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Started thedmd/imgui-node-editor integration

RefactorUnifiedBlendTreeStateMachineHandling
Martin Felis 2023-04-21 11:55:36 +02:00
parent 2dbf8373a8
commit 8dfc8dd05c
88 changed files with 35298 additions and 5 deletions
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61
3rdparty/imgui-node-editor/.github/workflows/build.yml vendored Normal file
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name: build
on:
push:
pull_request:
workflow_run:
# Use a workflow as a trigger of scheduled builds. Forked repositories can disable scheduled builds by disabling
# "scheduled" workflow, while maintaining ability to perform local CI builds.
workflows:
- scheduled
branches:
- master
- develop
types:
- requested
env:
# Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
BUILD_TYPE: Release
jobs:
Windows:
runs-on: windows-2019
env:
VS_PATH: C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\
MSBUILD_PATH: C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Current\Bin\
steps:
- uses: actions/checkout@v2
- name: Configure CMake
run: cmake -S examples -B ${{github.workspace}}/build -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
- name: Build
run: cmake --build ${{github.workspace}}/build --config ${{env.BUILD_TYPE}}
macOS:
runs-on: macos-latest
steps:
- name: Install Dependencies
run: |
brew install glfw3
- uses: actions/checkout@v2
- name: Configure CMake
run: cmake -S examples -B ${{github.workspace}}/build -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
- name: Build
run: cmake --build ${{github.workspace}}/build --config ${{env.BUILD_TYPE}}
Linux:
runs-on: ubuntu-latest
steps:
- name: Install Dependencies
run: |
sudo apt-get update
sudo apt-get install -y libglfw3-dev
- uses: actions/checkout@v2
- name: Configure CMake
run: cmake -S examples -B ${{github.workspace}}/build -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
- name: Build
run: cmake --build ${{github.workspace}}/build --config ${{env.BUILD_TYPE}}

11
3rdparty/imgui-node-editor/.gitignore vendored Normal file
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.vs
.vscode
.build*
.DS_Store
bin
[Bb]uild
*.VC.db
*.VC.opendb
*.user
*.ini
*.json

21
3rdparty/imgui-node-editor/LICENSE vendored Normal file
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MIT License
Copyright (c) 2019 Michał Cichoń
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

903
3rdparty/imgui-node-editor/crude_json.cpp vendored Normal file
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//Disable a bunch of warnings for now
#ifndef _MSC_VER
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wshadow"
#pragma GCC diagnostic ignored "-Wunused-but-set-variable"
#pragma GCC diagnostic ignored "-Wunused-parameter"
#endif
// Crude implementation of JSON value object and parser.
//
// VERSION 0.1
//
// LICENSE
// This software is dual-licensed to the public domain and under the following
// license: you are granted a perpetual, irrevocable license to copy, modify,
// publish, and distribute this file as you see fit.
//
// CREDITS
// Written by Michal Cichon
# include "crude_json.h"
# include <iomanip>
# include <limits>
# include <cstdlib>
# include <clocale>
# include <cmath>
# include <cstring>
# if CRUDE_JSON_IO
# include <stdio.h>
# include <memory>
# endif
namespace crude_json {
value::value(value&& other)
: m_Type(other.m_Type)
{
switch (m_Type)
{
case type_t::object: construct(m_Storage, std::move( *object_ptr(other.m_Storage))); break;
case type_t::array: construct(m_Storage, std::move( *array_ptr(other.m_Storage))); break;
case type_t::string: construct(m_Storage, std::move( *string_ptr(other.m_Storage))); break;
case type_t::boolean: construct(m_Storage, std::move(*boolean_ptr(other.m_Storage))); break;
case type_t::number: construct(m_Storage, std::move( *number_ptr(other.m_Storage))); break;
default: break;
}
destruct(other.m_Storage, other.m_Type);
other.m_Type = type_t::null;
}
value::value(const value& other)
: m_Type(other.m_Type)
{
switch (m_Type)
{
case type_t::object: construct(m_Storage, *object_ptr(other.m_Storage)); break;
case type_t::array: construct(m_Storage, *array_ptr(other.m_Storage)); break;
case type_t::string: construct(m_Storage, *string_ptr(other.m_Storage)); break;
case type_t::boolean: construct(m_Storage, *boolean_ptr(other.m_Storage)); break;
case type_t::number: construct(m_Storage, *number_ptr(other.m_Storage)); break;
default: break;
}
}
value& value::operator[](size_t index)
{
if (is_null())
m_Type = construct(m_Storage, type_t::array);
if (is_array())
{
auto& v = *array_ptr(m_Storage);
if (index >= v.size())
v.insert(v.end(), index - v.size() + 1, value());
return v[index];
}
CRUDE_ASSERT(false && "operator[] on unsupported type");
std::terminate();
}
const value& value::operator[](size_t index) const
{
if (is_array())
return (*array_ptr(m_Storage))[index];
CRUDE_ASSERT(false && "operator[] on unsupported type");
std::terminate();
}
value& value::operator[](const string& key)
{
if (is_null())
m_Type = construct(m_Storage, type_t::object);
if (is_object())
return (*object_ptr(m_Storage))[key];
CRUDE_ASSERT(false && "operator[] on unsupported type");
std::terminate();
}
const value& value::operator[](const string& key) const
{
if (is_object())
{
auto& o = *object_ptr(m_Storage);
auto it = o.find(key);
CRUDE_ASSERT(it != o.end());
return it->second;
}
CRUDE_ASSERT(false && "operator[] on unsupported type");
std::terminate();
}
bool value::contains(const string& key) const
{
if (is_object())
{
auto& o = *object_ptr(m_Storage);
auto it = o.find(key);
return it != o.end();
}
return false;
}
void value::push_back(const value& value)
{
if (is_null())
m_Type = construct(m_Storage, type_t::array);
if (is_array())
{
auto& v = *array_ptr(m_Storage);
v.push_back(value);
}
else
{
CRUDE_ASSERT(false && "operator[] on unsupported type");
std::terminate();
}
}
void value::push_back(value&& value)
{
if (is_null())
m_Type = construct(m_Storage, type_t::array);
if (is_array())
{
auto& v = *array_ptr(m_Storage);
v.push_back(std::move(value));
}
else
{
CRUDE_ASSERT(false && "operator[] on unsupported type");
std::terminate();
}
}
size_t value::erase(const string& key)
{
if (!is_object())
return 0;
auto& o = *object_ptr(m_Storage);
auto it = o.find(key);
if (it == o.end())
return 0;
o.erase(it);
return 1;
}
void value::swap(value& other)
{
using std::swap;
if (m_Type == other.m_Type)
{
switch (m_Type)
{
case type_t::object: swap(*object_ptr(m_Storage), *object_ptr(other.m_Storage)); break;
case type_t::array: swap(*array_ptr(m_Storage), *array_ptr(other.m_Storage)); break;
case type_t::string: swap(*string_ptr(m_Storage), *string_ptr(other.m_Storage)); break;
case type_t::boolean: swap(*boolean_ptr(m_Storage), *boolean_ptr(other.m_Storage)); break;
case type_t::number: swap(*number_ptr(m_Storage), *number_ptr(other.m_Storage)); break;
default: break;
}
}
else
{
value tmp(std::move(other));
other.~value();
new (&other) value(std::move(*this));
this->~value();
new (this) value(std::move(tmp));
}
}
string value::dump(const int indent, const char indent_char) const
{
dump_context_t context(indent, indent_char);
context.out.precision(std::numeric_limits<double>::max_digits10 + 1);
context.out << std::defaultfloat;
dump(context, 0);
return context.out.str();
}
void value::dump_context_t::write_indent(int level)
{
if (indent <= 0 || level == 0)
return;
out.fill(indent_char);
out.width(indent * level);
out << indent_char;
out.width(0);
}
void value::dump_context_t::write_separator()
{
if (indent < 0)
return;
out.put(' ');
}
void value::dump_context_t::write_newline()
{
if (indent < 0)
return;
out.put('\n');
}
void value::dump(dump_context_t& context, int level) const
{
context.write_indent(level);
switch (m_Type)
{
case type_t::null:
context.out << "null";
break;
case type_t::object:
context.out << '{';
{
context.write_newline();
bool first = true;
for (auto& entry : *object_ptr(m_Storage))
{
if (!first) { context.out << ','; context.write_newline(); } else first = false;
context.write_indent(level + 1);
context.out << '\"' << entry.first << "\":";
if (!entry.second.is_structured())
{
context.write_separator();
entry.second.dump(context, 0);
}
else
{
context.write_newline();
entry.second.dump(context, level + 1);
}
}
if (!first)
context.write_newline();
}
context.write_indent(level);
context.out << '}';
break;
case type_t::array:
context.out << '[';
{
context.write_newline();
bool first = true;
for (auto& entry : *array_ptr(m_Storage))
{
if (!first) { context.out << ','; context.write_newline(); } else first = false;
if (!entry.is_structured())
{
context.write_indent(level + 1);
entry.dump(context, 0);
}
else
{
entry.dump(context, level + 1);
}
}
if (!first)
context.write_newline();
}
context.write_indent(level);
context.out << ']';
break;
case type_t::string:
context.out << '\"';
if (string_ptr(m_Storage)->find_first_of("\"\\/\b\f\n\r") != string::npos || string_ptr(m_Storage)->find('\0') != string::npos)
{
for (auto c : *string_ptr(m_Storage))
{
if (c == '\"') context.out << "\\\"";
else if (c == '\\') context.out << "\\\\";
else if (c == '/') context.out << "\\/";
else if (c == '\b') context.out << "\\b";
else if (c == '\f') context.out << "\\f";
else if (c == '\n') context.out << "\\n";
else if (c == '\r') context.out << "\\r";
else if (c == '\t') context.out << "\\t";
else if (c == 0) context.out << "\\u0000";
else context.out << c;
}
}
else
context.out << *string_ptr(m_Storage);
context.out << '\"';
break;
case type_t::boolean:
if (*boolean_ptr(m_Storage))
context.out << "true";
else
context.out << "false";
break;
case type_t::number:
context.out << *number_ptr(m_Storage);
break;
default:
break;
}
}
struct value::parser
{
parser(const char* begin, const char* end)
: m_Cursor(begin)
, m_End(end)
{
}
value parse()
{
value v;
// Switch to C locale to make strtod and strtol work as expected
auto previous_locale = std::setlocale(LC_NUMERIC, "C");
// Accept single value only when end of the stream is reached.
if (!accept_element(v) || !eof())
v = value(type_t::discarded);
if (previous_locale && strcmp(previous_locale, "C") != 0)
std::setlocale(LC_NUMERIC, previous_locale);
return v;
}
private:
struct cursor_state
{
cursor_state(parser* p)
: m_Owner(p)
, m_LastCursor(p->m_Cursor)
{
}
void reset()
{
m_Owner->m_Cursor = m_LastCursor;
}
bool operator()(bool accept)
{
if (!accept)
reset();
else
m_LastCursor = m_Owner->m_Cursor;
return accept;
}
private:
parser* m_Owner;
const char* m_LastCursor;
};
cursor_state state()
{
return cursor_state(this);
}
bool accept_value(value& result)
{
return accept_object(result)
|| accept_array(result)
|| accept_string(result)
|| accept_number(result)
|| accept_boolean(result)
|| accept_null(result);
}
bool accept_object(value& result)
{
auto s = state();
object o;
if (s(accept('{') && accept_ws() && accept('}')))
{
result = o;
return true;
}
else if (s(accept('{') && accept_members(o) && accept('}')))
{
result = std::move(o);
return true;
}
return false;
}
bool accept_members(object& o)
{
if (!accept_member(o))
return false;
while (true)
{
auto s = state();
if (!s(accept(',') && accept_member(o)))
break;
}
return true;
}
bool accept_member(object& o)
{
auto s = state();
value key;
value v;
if (s(accept_ws() && accept_string(key) && accept_ws() && accept(':') && accept_element(v)))
{
o.emplace(std::move(key.get<string>()), std::move(v));
return true;
}
return false;
}
bool accept_array(value& result)
{
auto s = state();
if (s(accept('[') && accept_ws() && accept(']')))
{
result = array();
return true;
}
array a;
if (s(accept('[') && accept_elements(a) && accept(']')))
{
result = std::move(a);
return true;
}
return false;
}
bool accept_elements(array& a)
{
value v;
if (!accept_element(v))
return false;
a.emplace_back(std::move(v));
while (true)
{
auto s = state();
v = nullptr;
if (!s(accept(',') && accept_element(v)))
break;
a.emplace_back(std::move(v));
}
return true;
}
bool accept_element(value& result)
{
auto s = state();
return s(accept_ws() && accept_value(result) && accept_ws());
}
bool accept_string(value& result)
{
auto s = state();
string v;
if (s(accept('\"') && accept_characters(v) && accept('\"')))
{
result = std::move(v);
return true;
}
else
return false;
}
bool accept_characters(string& result)
{
int c;
while (accept_character(c))
{
CRUDE_ASSERT(c < 128); // #todo: convert characters > 127 to UTF-8
result.push_back(static_cast<char>(c));
}
return true;
}
bool accept_character(int& c)
{
auto s = state();
if (accept('\\'))
{
return accept_escape(c);
}
else if (expect('\"'))
return false;
// #todo: Handle UTF-8 sequences.
return s((c = peek()) >= 0) && advance();
}
bool accept_escape(int& c)
{
if (accept('\"')) { c = '\"'; return true; }
if (accept('\\')) { c = '\\'; return true; }
if (accept('/')) { c = '/'; return true; }
if (accept('b')) { c = '\b'; return true; }
if (accept('f')) { c = '\f'; return true; }
if (accept('n')) { c = '\n'; return true; }
if (accept('r')) { c = '\r'; return true; }
if (accept('t')) { c = '\t'; return true; }
auto s = state();
string hex;
hex.reserve(4);
if (s(accept('u') && accept_hex(hex) && accept_hex(hex) && accept_hex(hex) && accept_hex(hex)))
{
char* end = nullptr;
auto v = std::strtol(hex.c_str(), &end, 16);
if (end != hex.c_str() + hex.size())
return false;
c = v;
return true;
}
return false;
}
bool accept_hex(string& result)
{
if (accept_digit(result))
return true;
auto c = peek();
if ((c >= 'A' && c <= 'F') || (c >= 'a' && c <= 'f'))
{
advance();
result.push_back(static_cast<char>(c));
return true;
}
return false;
}
bool accept_number(value& result)
{
auto s = state();
string n;
if (s(accept_int(n) && accept_frac(n) && accept_exp(n)))
{
char* end = nullptr;
auto v = std::strtod(n.c_str(), &end);
if (end != n.c_str() + n.size())
return false;
if (v != 0 && !std::isnormal(v))
return false;
result = v;
return true;
}
return false;
}
bool accept_int(string& result)
{
auto s = state();
string part;
if (s(accept_onenine(part) && accept_digits(part)))
{
result += std::move(part);
return true;
}
part.resize(0);
if (accept_digit(part))
{
result += std::move(part);
return true;
}
part.resize(0);
if (s(accept('-') && accept_onenine(part) && accept_digits(part)))
{
result += '-';
result += std::move(part);
return true;
}
part.resize(0);
if (s(accept('-') && accept_digit(part)))
{
result += '-';
result += std::move(part);
return true;
}
return false;
}
bool accept_digits(string& result)
{
string part;
if (!accept_digit(part))
return false;
while (accept_digit(part))
;
result += std::move(part);
return true;
}
bool accept_digit(string& result)
{
if (accept('0'))
{
result.push_back('0');
return true;
}
else if (accept_onenine(result))
return true;
return false;
}
bool accept_onenine(string& result)
{
auto c = peek();
if (c >= '1' && c <= '9')
{
result.push_back(static_cast<char>(c));
return advance();
}
return false;
}
bool accept_frac(string& result)
{
auto s = state();
string part;
if (s(accept('.') && accept_digits(part)))
{
result += '.';
result += std::move(part);
}
return true;
}
bool accept_exp(string& result)
{
auto s = state();
string part;
if (s(accept('e') && accept_sign(part) && accept_digits(part)))
{
result += 'e';
result += std::move(part);
return true;
}
part.resize(0);
if (s(accept('E') && accept_sign(part) && accept_digits(part)))
{
result += 'E';
result += std::move(part);
}
return true;
}
bool accept_sign(string& result)
{
if (accept('+'))
result.push_back('+');
else if (accept('-'))
result.push_back('-');
return true;
}
bool accept_ws()
{
while (expect('\x09') || expect('\x0A') || expect('\x0D') || expect('\x20'))
advance();
return true;
}
bool accept_boolean(value& result)
{
if (accept("true"))
{
result = true;
return true;
}
else if (accept("false"))
{
result = false;
return true;
}
return false;
}
bool accept_null(value& result)
{
if (accept("null"))
{
result = nullptr;
return true;
}
return false;
}
bool accept(char c)
{
if (expect(c))
return advance();
else
return false;
}
bool accept(const char* str)
{
auto last = m_Cursor;
while (*str)
{
if (eof() || *str != *m_Cursor)
{
m_Cursor = last;
return false;
}
advance();
++str;
}
return true;
}
int peek() const
{
if (!eof())
return *m_Cursor;
else
return -1;
}
bool expect(char c)
{
return peek() == c;
}
bool advance(int count = 1)
{
if (m_Cursor + count > m_End)
{
m_Cursor = m_End;
return false;
}
m_Cursor += count;
return true;
}
bool eof() const
{
return m_Cursor == m_End;
}
const char* m_Cursor;
const char* m_End;
};
value value::parse(const string& data)
{
auto p = parser(data.c_str(), data.c_str() + data.size());
auto v = p.parse();
return v;
}
# if CRUDE_JSON_IO
std::pair<value, bool> value::load(const string& path)
{
// Modern C++, so beautiful...
std::unique_ptr<FILE, void(*)(FILE*)> file{nullptr, [](FILE* file) { if (file) fclose(file); }};
# if defined(_MSC_VER) || (defined(__STDC_LIB_EXT1__) && __STDC_WANT_LIB_EXT1__)
FILE* handle = nullptr;
if (fopen_s(&handle, path.c_str(), "rb") != 0)
return {value{}, false};
file.reset(handle);
# else
file.reset(fopen(path.c_str(), "rb"));
# endif
if (!file)
return {value{}, false};
fseek(file.get(), 0, SEEK_END);
auto size = static_cast<size_t>(ftell(file.get()));
fseek(file.get(), 0, SEEK_SET);
string data;
data.resize(size);
if (fread(const_cast<char*>(data.data()), size, 1, file.get()) != 1)
return {value{}, false};
return {parse(data), true};
}
bool value::save(const string& path, const int indent, const char indent_char) const
{
// Modern C++, so beautiful...
std::unique_ptr<FILE, void(*)(FILE*)> file{nullptr, [](FILE* file) { if (file) fclose(file); }};
# if defined(_MSC_VER) || (defined(__STDC_LIB_EXT1__) && __STDC_WANT_LIB_EXT1__)
FILE* handle = nullptr;
if (fopen_s(&handle, path.c_str(), "wb") != 0)
return false;
file.reset(handle);
# else
file.reset(fopen(path.c_str(), "wb"));
# endif
if (!file)
return false;
auto data = dump(indent, indent_char);
if (fwrite(data.data(), data.size(), 1, file.get()) != 1)
return false;
return true;
}
# endif
} // namespace crude_json
//Disable a bunch of warnings for now
#ifndef _MSC_VER
#pragma GCC diagnostic pop
#endif

261
3rdparty/imgui-node-editor/crude_json.h vendored Normal file
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//Disable a bunch of warnings for now
#ifndef _MSC_VER
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wshadow"
#endif
// Crude implementation of JSON value object and parser.
//
// VERSION 0.1
//
// LICENSE
// This software is dual-licensed to the public domain and under the following
// license: you are granted a perpetual, irrevocable license to copy, modify,
// publish, and distribute this file as you see fit.
//
// CREDITS
// Written by Michal Cichon
# ifndef __CRUDE_JSON_H__
# define __CRUDE_JSON_H__
# pragma once
# include <type_traits>
# include <string>
# include <vector>
# include <map>
# include <cstddef>
# include <algorithm>
# include <sstream>
# ifndef CRUDE_ASSERT
# include <cassert>
# define CRUDE_ASSERT(expr) assert(expr)
# endif
# ifndef CRUDE_JSON_IO
# define CRUDE_JSON_IO 1
# endif
namespace crude_json {
struct value;
using string = std::string;
using object = std::map<string, value>;
using array = std::vector<value>;
using number = double;
using boolean = bool;
using null = std::nullptr_t;
enum class type_t
{
null,
object,
array,
string,
boolean,
number,
discarded
};
struct value
{
value(type_t type = type_t::null): m_Type(construct(m_Storage, type)) {}
value(value&& other);
value(const value& other);
value( null) : m_Type(construct(m_Storage, null())) {}
value( object&& v): m_Type(construct(m_Storage, std::move(v))) {}
value(const object& v): m_Type(construct(m_Storage, v)) {}
value( array&& v): m_Type(construct(m_Storage, std::move(v))) {}
value(const array& v): m_Type(construct(m_Storage, v)) {}
value( string&& v): m_Type(construct(m_Storage, std::move(v))) {}
value(const string& v): m_Type(construct(m_Storage, v)) {}
value(const char* v): m_Type(construct(m_Storage, v)) {}
value( boolean v): m_Type(construct(m_Storage, v)) {}
value( number v): m_Type(construct(m_Storage, v)) {}
~value() { destruct(m_Storage, m_Type); }
value& operator=(value&& other) { if (this != &other) { value(std::move(other)).swap(*this); } return *this; }
value& operator=(const value& other) { if (this != &other) { value( other).swap(*this); } return *this; }
value& operator=( null) { auto other = value( ); swap(other); return *this; }
value& operator=( object&& v) { auto other = value(std::move(v)); swap(other); return *this; }
value& operator=(const object& v) { auto other = value( v); swap(other); return *this; }
value& operator=( array&& v) { auto other = value(std::move(v)); swap(other); return *this; }
value& operator=(const array& v) { auto other = value( v); swap(other); return *this; }
value& operator=( string&& v) { auto other = value(std::move(v)); swap(other); return *this; }
value& operator=(const string& v) { auto other = value( v); swap(other); return *this; }
value& operator=(const char* v) { auto other = value( v); swap(other); return *this; }
value& operator=( boolean v) { auto other = value( v); swap(other); return *this; }
value& operator=( number v) { auto other = value( v); swap(other); return *this; }
type_t type() const { return m_Type; }
operator type_t() const { return m_Type; }
value& operator[](size_t index);
const value& operator[](size_t index) const;
value& operator[](const string& key);
const value& operator[](const string& key) const;
bool contains(const string& key) const;
void push_back(const value& value);
void push_back(value&& value);
size_t erase(const string& key);
bool is_primitive() const { return is_string() || is_number() || is_boolean() || is_null(); }
bool is_structured() const { return is_object() || is_array(); }
bool is_null() const { return m_Type == type_t::null; }
bool is_object() const { return m_Type == type_t::object; }
bool is_array() const { return m_Type == type_t::array; }
bool is_string() const { return m_Type == type_t::string; }
bool is_boolean() const { return m_Type == type_t::boolean; }
bool is_number() const { return m_Type == type_t::number; }
bool is_discarded() const { return m_Type == type_t::discarded; }
template <typename T> const T& get() const;
template <typename T> T& get();
template <typename T> const T* get_ptr() const;
template <typename T> T* get_ptr();
string dump(const int indent = -1, const char indent_char = ' ') const;
void swap(value& other);
inline friend void swap(value& lhs, value& rhs) { lhs.swap(rhs); }
// Returns discarded value for invalid inputs.
static value parse(const string& data);
# if CRUDE_JSON_IO
static std::pair<value, bool> load(const string& path);
bool save(const string& path, const int indent = -1, const char indent_char = ' ') const;
# endif
private:
struct parser;
// VS2015: std::max() is not constexpr yet.
# define CRUDE_MAX2(a, b) ((a) < (b) ? (b) : (a))
# define CRUDE_MAX3(a, b, c) CRUDE_MAX2(CRUDE_MAX2(a, b), c)
# define CRUDE_MAX4(a, b, c, d) CRUDE_MAX2(CRUDE_MAX3(a, b, c), d)
# define CRUDE_MAX5(a, b, c, d, e) CRUDE_MAX2(CRUDE_MAX4(a, b, c, d), e)
enum
{
max_size = CRUDE_MAX5( sizeof(string), sizeof(object), sizeof(array), sizeof(number), sizeof(boolean)),
max_align = CRUDE_MAX5(alignof(string), alignof(object), alignof(array), alignof(number), alignof(boolean))
};
# undef CRUDE_MAX5
# undef CRUDE_MAX4
# undef CRUDE_MAX3
# undef CRUDE_MAX2
using storage_t = std::aligned_storage<max_size, max_align>::type;
static object* object_ptr( storage_t& storage) { return reinterpret_cast< object*>(&storage); }
static const object* object_ptr(const storage_t& storage) { return reinterpret_cast<const object*>(&storage); }
static array* array_ptr( storage_t& storage) { return reinterpret_cast< array*>(&storage); }
static const array* array_ptr(const storage_t& storage) { return reinterpret_cast<const array*>(&storage); }
static string* string_ptr( storage_t& storage) { return reinterpret_cast< string*>(&storage); }
static const string* string_ptr(const storage_t& storage) { return reinterpret_cast<const string*>(&storage); }
static boolean* boolean_ptr( storage_t& storage) { return reinterpret_cast< boolean*>(&storage); }
static const boolean* boolean_ptr(const storage_t& storage) { return reinterpret_cast<const boolean*>(&storage); }
static number* number_ptr( storage_t& storage) { return reinterpret_cast< number*>(&storage); }
static const number* number_ptr(const storage_t& storage) { return reinterpret_cast<const number*>(&storage); }
static type_t construct(storage_t& storage, type_t type)
{
switch (type)
{
case type_t::object: new (&storage) object(); break;
case type_t::array: new (&storage) array(); break;
case type_t::string: new (&storage) string(); break;
case type_t::boolean: new (&storage) boolean(); break;
case type_t::number: new (&storage) number(); break;
default: break;
}
return type;
}
static type_t construct(storage_t& storage, null) { (void)storage; return type_t::null; }
static type_t construct(storage_t& storage, object&& value) { new (&storage) object(std::forward<object>(value)); return type_t::object; }
static type_t construct(storage_t& storage, const object& value) { new (&storage) object(value); return type_t::object; }
static type_t construct(storage_t& storage, array&& value) { new (&storage) array(std::forward<array>(value)); return type_t::array; }
static type_t construct(storage_t& storage, const array& value) { new (&storage) array(value); return type_t::array; }
static type_t construct(storage_t& storage, string&& value) { new (&storage) string(std::forward<string>(value)); return type_t::string; }
static type_t construct(storage_t& storage, const string& value) { new (&storage) string(value); return type_t::string; }
static type_t construct(storage_t& storage, const char* value) { new (&storage) string(value); return type_t::string; }
static type_t construct(storage_t& storage, boolean value) { new (&storage) boolean(value); return type_t::boolean; }
static type_t construct(storage_t& storage, number value) { new (&storage) number(value); return type_t::number; }
static void destruct(storage_t& storage, type_t type)
{
switch (type)
{
case type_t::object: object_ptr(storage)->~object(); break;
case type_t::array: array_ptr(storage)->~array(); break;
case type_t::string: string_ptr(storage)->~string(); break;
default: break;
}
}
struct dump_context_t
{
std::ostringstream out;
const int indent = -1;
const char indent_char = ' ';
// VS2015: Aggregate initialization isn't a thing yet.
dump_context_t(const int indent, const char indent_char)
: indent(indent)
, indent_char(indent_char)
{
}
void write_indent(int level);
void write_separator();
void write_newline();
};
void dump(dump_context_t& context, int level) const;
storage_t m_Storage;
type_t m_Type;
};
template <> inline const object& value::get<object>() const { CRUDE_ASSERT(m_Type == type_t::object); return *object_ptr(m_Storage); }
template <> inline const array& value::get<array>() const { CRUDE_ASSERT(m_Type == type_t::array); return *array_ptr(m_Storage); }
template <> inline const string& value::get<string>() const { CRUDE_ASSERT(m_Type == type_t::string); return *string_ptr(m_Storage); }
template <> inline const boolean& value::get<boolean>() const { CRUDE_ASSERT(m_Type == type_t::boolean); return *boolean_ptr(m_Storage); }
template <> inline const number& value::get<number>() const { CRUDE_ASSERT(m_Type == type_t::number); return *number_ptr(m_Storage); }
template <> inline object& value::get<object>() { CRUDE_ASSERT(m_Type == type_t::object); return *object_ptr(m_Storage); }
template <> inline array& value::get<array>() { CRUDE_ASSERT(m_Type == type_t::array); return *array_ptr(m_Storage); }
template <> inline string& value::get<string>() { CRUDE_ASSERT(m_Type == type_t::string); return *string_ptr(m_Storage); }
template <> inline boolean& value::get<boolean>() { CRUDE_ASSERT(m_Type == type_t::boolean); return *boolean_ptr(m_Storage); }
template <> inline number& value::get<number>() { CRUDE_ASSERT(m_Type == type_t::number); return *number_ptr(m_Storage); }
template <> inline const object* value::get_ptr<object>() const { if (m_Type == type_t::object) return object_ptr(m_Storage); else return nullptr; }
template <> inline const array* value::get_ptr<array>() const { if (m_Type == type_t::array) return array_ptr(m_Storage); else return nullptr; }
template <> inline const string* value::get_ptr<string>() const { if (m_Type == type_t::string) return string_ptr(m_Storage); else return nullptr; }
template <> inline const boolean* value::get_ptr<boolean>() const { if (m_Type == type_t::boolean) return boolean_ptr(m_Storage); else return nullptr; }
template <> inline const number* value::get_ptr<number>() const { if (m_Type == type_t::number) return number_ptr(m_Storage); else return nullptr; }
template <> inline object* value::get_ptr<object>() { if (m_Type == type_t::object) return object_ptr(m_Storage); else return nullptr; }
template <> inline array* value::get_ptr<array>() { if (m_Type == type_t::array) return array_ptr(m_Storage); else return nullptr; }
template <> inline string* value::get_ptr<string>() { if (m_Type == type_t::string) return string_ptr(m_Storage); else return nullptr; }
template <> inline boolean* value::get_ptr<boolean>() { if (m_Type == type_t::boolean) return boolean_ptr(m_Storage); else return nullptr; }
template <> inline number* value::get_ptr<number>() { if (m_Type == type_t::number) return number_ptr(m_Storage); else return nullptr; }
} // namespace crude_json
# endif // __CRUDE_JSON_H__
//Disable a bunch of warnings for now
#ifndef _MSC_VER
#pragma GCC diagnostic pop
#endif

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v0.9.1 (WIP):
CHANGE: Remove unwanted extra frame height from node bottom
CHANGE: Allow to specify if links of deleted node should also be automatically deleted
Now it is possible to delete only node without automatically serving links,
application can choose to do this operation by itself and for example
short circuit flow links ot do any other special operation.
CHANGE: Canvas: Allow to overlap canvas widget
CHANGE: Natvis: Move crude_json natvis to separate file
CHANGE: Natvis: Show readable NodeId/PinId/LinkId
CHANGE: Make Navigate action to honor duration
CHANGE: Travis: Use Ubuntu Bionic (18.04) for CI, to get newer version of GLFW3
CHANGE: Editor: Make action button internally configurable
CHANGE: Make Node Editor forward compatible with ImGui 1.80+ (#112)
We're keeping backward compatibility with pre 1.8x versions.
CHANGE: Update internal copy ImGui to 1.84 (WIP) (3512f2c2c283ec86) (#107)
Internal copy has two PR's merged:
https://github.com/thedmd/imgui/tree/feature/layout - used in blueprints example only
https://github.com/thedmd/imgui/tree/feature/extra-keys - optional: used by Node Editor if present
CHANGE: Use github actions instead of Travis and AppVeyor (#113)
CHANGE: Delete operation on node/link will remove internal object (#173)
CHANGE: Natvis: Add crude_json::value visualization
NEW: All source components are now versioned
NEW: Make view state independent of window resolution.
NEW: Editor can now break links connected specified node or pin
New API:
int BreakLinks(NodeId nodeId);
int BreakLinks(PinId pinId);
NEW: Editor can now tell if node or pin has any links attached
New API:
bool HasAnyLinks(NodeId nodeId);
bool HasAnyLinks(PinId pinId);
NEW: Editor can be queried if particular node or link is selected
New API:
bool IsNodeSelected(NodeId nodeId);
bool IsLinkSelected(LinkId linkId);
NEW: Editor now can return pins of the link
New API:
bool GetLinkPins(LinkId linkId, PinId* startPinId, PinId* endPinId);
`startPinId` and `endPinId` may be null if caller is not interested
in particular id.
NEW: Editor now return ids of hovered node/pin/link
New API:
NodeId GetHoveredNode();
PinId GetHoveredPin();
LinkId GetHoveredLink();
NEW: Add SetGroupSize() to explicitly set group size
New API:
void SetGroupSize(NodeId nodeId, const ImVec2& size);
NEW: crude_json: Add save() and load()
When CRUDE_JSON_IO == 1 value will have load() and save()
function implemented using stdio.h FILE.
NEW: crude_json: Add erase() and get_ptr()
NEW: Application overhaul
- Convert from function based to inheritable class
- Add ability to close app and change title from code
- Add ability to control main window flags (ex. show menubar)
- Save ImGui state to ini file
- Render using pre-multiplied alpha textures
- Add extra fonts to examples.
NEW: Reintegrate Widgets example from @crolando (#77)
NEW: User can now override button indices for various actions (#88)
New API in Config:
int DragButtonIndex; // Mouse button index drag action will react to (0-left, 1-right, 2-middle)
int SelectButtonIndex; // Mouse button index select action will react to (0-left, 1-right, 2-middle)
int NavigateButtonIndex; // Mouse button index navigate action will react to (0-left, 1-right, 2-middle)
int ContextMenuButtonIndex; // Mouse button index context menu action will react to (0-left, 1-right, 2-middle)
NEW: Flow direction can now be picked per flow (#104)
New API:
enum class FlowDirection
{
Forward,
Backward
};
void Flow(LinkId linkId, FlowDirection direction = FlowDirection::Forward);
NEW: Editor can now return number of submitted nodes (#81)
New API:
int GetNodeCount(); // Returns number of submitted nodes since Begin() call
NEW: Editor can now return nodes in order they are drawn (#81)
New API:
int GetOrderedNodeIds(NodeId* nodes, int size); // Fills an array with node id's in order they're drawn; up to 'size` elements are set. Returns actual size of filled id's.
NEW: Editor now allow to set Z position for nodes (#109)
Nodes with higher Z position are drawn on top of ones with lower.
New API:
void SetNodeZPosition(NodeId nodeId, float z); // Sets node z position, nodes with higher value are drawn over nodes with lower value
float GetNodeZPosition(NodeId nodeId); // Returns node z position, defaults is 0.0f
NEW: Editor: SaveReasonFlags now inform about node creation/deletion
NEW: Editor: Expose button index background was clicked with
New API:
ImGuiMouseButton GetBackgroundClickButtonIndex(); // -1 if none
ImGuiMouseButton GetBackgroundDoubleClickButtonIndex(); // -1 if none
NEW: Editor: Expose configuration editor was created with
New API:
const Config& GetConfig(EditorContext* ctx = nullptr);
NEW: Editor: Add highlighting of Links connected to selected Node (#175)
New API:
StyleColor_HighlightLinkBorder
StyleVar_HighlightConnectedLinks
NEW: Editor: Add ability to snap link origin to pin direction (#167)
New API:
StyleVar_SnapLinkToPinDir
NEW: Editor: Add way to override default zoom levels (#174)
New API:
ImVector<float> Config::CustomZoomLevels;
NEW: Editor: Add canvas size mode (#170)
Config can now decide how editor should resize view when changing size.
New API:
enum class CanvasSizeMode;
Config::CanvasSizeMode;
BUGFIX: Avoid crash while destroying editor.
BUGFIX: Save draw list used by editor between Begin() and End()
There is a chance ImGui::GetWindowDrawList() will return different draw list
while nodes are being composed. To avoid troubles of manipulating incorrect
draw list one obtained in Begin() is remembered and used.
BUGFIX: Avoid division by zero in ImCubicBezierBoundingRect
BUGFIX: Don't stuck in delete action if user does not handle it
BUGFIX: Enable use channel splitter inside Begin/End for node and pin. #28
BUGFIX: Don't manipulate channels when editor is suspended #28
BUGFIX: Fix ObjectId serialization
BUGFIX: GroupNode resize instead of move on low zoom #87
BUGFIX: Make Canvas work with Viewports (#91, #90)
BUGFIX: Explicitly choose embedded GL3W as OpenGL extension loader (#96)
BUGFIX: Application: Don't apply HiDPI logic for (-FLT_MAX,-FLT_MAX) mouse position
BUGFIX: Editor: Clamp over-the-edge drag distance to prevent scrolling to infinity on focus lost
BUGFIX: Editor: Consume scroll event (#73) (require ImGui 17909 or later)
BUGFIX: Editor: Respect window focus while handling actions (#99)
BUGFIX: Examples: Correct case of `data` directory (#97)
BUGFIX: Canvas: Save/Restore CursorMaxPos only in Begin/End (#101)
BUGFIX: Editor: Don't implicitly capture keyboard (#83)
BUGFIX: Application: Reset key down state after loosing keyboard focus
BUGFIX: Editor: Make off-screen dragging work again
BUGFIX: ImGui: Disable obsolete functions (#103)
BUGFIX: Editor: Allow nodes with zero size (#134)
BUGFIX: Canvas: Update call ImGui::IsClippedEx() on ImGui > 18415 (#138)
BUGFIX: Canvas: Disable pink debug outline around widget (#150)
BUGFIX: Editor: Remove node settings when it is explicitly deleted (#153)
BUGFIX: Editor: Improve link dragging with fast movement (#156)
BUGFIX: Editor: Make selection rect start at click point
BUGFIX: Editor: Make selection rect sharp
BUGFIX: Editor: Don't populate unused channels with empty draw command, fixes memory leak (#168, #165)
BUGFIX: Application: Correctly set DX11 View for NULL textures (#162)
BUGFIX: Application: Recreate DX11 resources lazily (related to #162)
BUGFIX: Editor: Don't steal input from active user widget (#172)
BUGFIX: Editor: Delete item from internal list only when action accepts (#178)
BUGFIX: Editor: Cycle canvas to correctly restore view on first frame (#159)
BUGFIX: Editor: Don't relay on ImGui CursorMaxPos to apply padding (https://github.com/ocornut/imgui/issues/5548)

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# Node Editor in ImGui
[![build](https://github.com/thedmd/imgui-node-editor/actions/workflows/build.yml/badge.svg)](https://github.com/thedmd/imgui-node-editor/actions/workflows/build.yml)
## About
An implementation of node editor with ImGui-like API.
Project purpose is to serve as a basis for more complex solutions like blueprint editors.
![node_editor_overview](https://user-images.githubusercontent.com/1197433/89328475-c01bc680-d68d-11ea-88bf-8c4155480927.gif)
Node Editor is build around an idea "draw your content, we do the rest", which mean interactions are handled by editor, content rendering is handled by user. Editor will take care of:
* placing your node in the word
* dragging nodes
* zoom and scrolling
* selection
* various interaction that can be queried by API (creation, deletion, selection changes, etc.)
Here are some highlights:
* Node movement and selection is handled internally
* Node and pin contents are fully customizable
* Fully styled, default theme is modeled after UE4 blueprints
- Flexible enough to produce such nodes:
![image](https://user-images.githubusercontent.com/1197433/60381408-c3895b00-9a54-11e9-8312-d9fc9af63347.png)
![image](https://user-images.githubusercontent.com/1197433/60381400-a3599c00-9a54-11e9-9c51-a88f25f7db07.png)
![image](https://user-images.githubusercontent.com/1197433/60381589-7d81c680-9a57-11e9-87b1-9f73ec33bea4.png)
- Customizable links based on Bézier curves:
![image](https://user-images.githubusercontent.com/1197433/60381475-ac973880-9a55-11e9-9ad9-5862975cd2b8.png)
![image](https://user-images.githubusercontent.com/1197433/60381467-9db08600-9a55-11e9-9868-2ae849f67de9.png)
![image](https://user-images.githubusercontent.com/1197433/60381488-cd5f8e00-9a55-11e9-8346-1f4c8d6bea22.png)
* Automatic highlights for nodes, pins and links:
![image](https://user-images.githubusercontent.com/1197433/60381536-9e95e780-9a56-11e9-80bb-dad0d3d9557a.png)
* Smooth navigation and selection
* Node state can be saved in user context, so layout will not break
* Selection rectangles and group dragging
* Context menu support
* Basic shortcuts support (cut/copy/paste/delete)
* ImGui style API
Editor is used to implement blueprint editor in Spark CE engine, it proved itself there by allowing to do everything we needed. Therefore it is now slowly moving into stable state from beeing a prototype.
Note: Project recently was restructured to mimic ImGui layout.
Please report issues or questions if something isn't clear.
## Dependencies
* Vanilla ImGui 1.72+
* C++14
### Dependencies for examples:
* https://github.com/thedmd/imgui/tree/feature/layout (used in blueprints sample only)
### Optional extension you can pull into your local copy of ImGui node editor can take advantage of:
* ~~https://github.com/thedmd/imgui/tree/feature/draw-list-fringe-scale (for sharp rendering, while zooming)~~ It is part of ImGui since 1.80 release
* https://github.com/thedmd/imgui/tree/feature/extra-keys (for extra shortcuts)
## Building / Installing
Node Editor sources are located in root project directory. To use it, simply copy&paste sources into your project. Exactly like you can do with ImGui.
### Examples
[Examples](../examples) can be build with CMake:
```
Windows:
cmake -S examples -B build -G "Visual Studio 15 2017 Win64"
or
cmake -S examples -B build -G "Visual Studio 16 2019" -A x64
macOS:
cmake -S examples -B build -G "Xcode"
Linux:
cmake -S examples -B build -G "Unix Makefiles"
Build:
cmake --build build --config Release
```
Executables will be located in `build\bin` directory.
### Quick Start
Main node editor header is located in [imgui_node_editor.h](../imgui_node_editor.h).
Minimal example of one node can be found in [simple-example.cpp](../examples/simple-example/simple-example.cpp).
Press 'F' in editor to focus on editor content if you see only grid.
```cpp
# include <imgui.h>
# include <imgui_node_editor.h>
# include <application.h>
namespace ed = ax::NodeEditor;
struct Example:
public Application
{
using Application::Application;
void OnStart() override
{
ed::Config config;
config.SettingsFile = "Simple.json";
m_Context = ed::CreateEditor(&config);
}
void OnStop() override
{
ed::DestroyEditor(m_Context);
}
void OnFrame(float deltaTime) override
{
auto& io = ImGui::GetIO();
ImGui::Text("FPS: %.2f (%.2gms)", io.Framerate, io.Framerate ? 1000.0f / io.Framerate : 0.0f);
ImGui::Separator();
ed::SetCurrentEditor(m_Context);
ed::Begin("My Editor", ImVec2(0.0, 0.0f));
int uniqueId = 1;
// Start drawing nodes.
ed::BeginNode(uniqueId++);
ImGui::Text("Node A");
ed::BeginPin(uniqueId++, ed::PinKind::Input);
ImGui::Text("-> In");
ed::EndPin();
ImGui::SameLine();
ed::BeginPin(uniqueId++, ed::PinKind::Output);
ImGui::Text("Out ->");
ed::EndPin();
ed::EndNode();
ed::End();
ed::SetCurrentEditor(nullptr);
//ImGui::ShowMetricsWindow();
}
ed::EditorContext* m_Context = nullptr;
};
int Main(int argc, char** argv)
{
Example exampe("Simple", argc, argv);
if (exampe.Create())
return exampe.Run();
return 0;
}
```
Result:
![00-Simple](https://user-images.githubusercontent.com/1197433/89328516-cca01f00-d68d-11ea-9959-2da159851101.png)
For more details please visit [examples](../examples) folder.
### Blueprints Example
![Preview2](https://user-images.githubusercontent.com/1197433/60053458-2f2b9b00-96d8-11e9-92f9-08aff63b2023.png)
### Here is Node Editor at work in Spark CE
![image](https://user-images.githubusercontent.com/1197433/60381756-174a7300-9a5a-11e9-9a04-00f10565e05e.png)
![image](https://user-images.githubusercontent.com/1197433/60381760-2f21f700-9a5a-11e9-9053-c0547a9cc40a.png)

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In random order:
* Documentation: Make one
Done:
* ~~ImGui: Factor out changes to ImGui to use vanilla version.~~
* ~~Editor: Fix variable naming (mainly add `m_` prefix)~~
* ~~Editor: Split NodeEditorImpl.cpp to multiple files, file has grown too big.~~
* ~~Editor: Factor out use of `picojson.h`~~
* ~~Editor: Move use of `<optional>` to optional code extensions~~
#57 - join `ax::NodeEditor::EditorContext` with `struct EditorContext` and remove `reinterpret_cast<>`

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cmake_minimum_required(VERSION 3.12)
project(imgui-node-editor)
# Define IMGUI_NODE_EDITOR_ROOT_DIR pointing to project root directory
get_filename_component(IMGUI_NODE_EDITOR_ROOT_DIR ${CMAKE_SOURCE_DIR}/.. ABSOLUTE CACHE)
# Enable solution folders in Visual Studio and Folders in Xcode
set_property(GLOBAL PROPERTY USE_FOLDERS ON)
# Point CMake where to look for module files.
list(APPEND CMAKE_MODULE_PATH ${IMGUI_NODE_EDITOR_ROOT_DIR}/misc/cmake-modules)
# Node editor use C++14
set(CMAKE_CXX_STANDARD 14)
set(CMAKE_CXX_STANDARD_REQUIRED YES)
# Macro that will configure an example application
macro(add_example_executable name)
project(${name})
set(_Example_Sources
${ARGN}
)
#source_group("" FILES ${_Example_Sources})
source_group(TREE ${CMAKE_CURRENT_SOURCE_DIR} FILES ${_Example_Sources})
file(GLOB _Example_CommonResources CONFIGURE_DEPENDS "${IMGUI_NODE_EDITOR_ROOT_DIR}/examples/data/*")
file(GLOB _Example_Resources CONFIGURE_DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/data/*")
#message(FATAL_ERROR "_Example_Resources = ${_Example_Resources}")
set(_Example_Type)
if (WIN32)
set(_Example_Type WIN32)
set(ApplicationIcon ${IMGUI_NODE_EDITOR_ROOT_DIR}/examples/Application/Support/Icon.ico)
file(TO_NATIVE_PATH "${ApplicationIcon}" ApplicationIcon)
string(REPLACE "\\" "\\\\" ApplicationIcon "${ApplicationIcon}")
configure_file(
${IMGUI_NODE_EDITOR_ROOT_DIR}/examples/Application/Support/Resource.rc.in
${CMAKE_CURRENT_BINARY_DIR}/Resource.rc
)
source_group(TREE "${IMGUI_NODE_EDITOR_ROOT_DIR}/examples" FILES ${_Example_CommonResources})
source_group(TREE "${CMAKE_CURRENT_SOURCE_DIR}" FILES ${_Example_Resources})
list(APPEND _Example_Resources
${CMAKE_CURRENT_BINARY_DIR}/Resource.rc
${_Example_CommonResources}
)
source_group("resources" FILES ${CMAKE_CURRENT_BINARY_DIR}/Resource.rc)
elseif (APPLE)
set(_Example_Type MACOSX_BUNDLE)
set_source_files_properties(${_Example_Resources} ${_Example_CommonResources} PROPERTIES
MACOSX_PACKAGE_LOCATION "Resources/data"
)
set(_Example_Icon "${IMGUI_NODE_EDITOR_ROOT_DIR}/examples/application/support/Icon.icns")
list(APPEND _Example_Resources ${_Example_Icon})
set_source_files_properties(${_Example_Icon} PROPERTIES
MACOSX_PACKAGE_LOCATION "Resources"
)
endif()
add_executable(${name} ${_Example_Type} ${_Example_Sources} ${_Example_Resources} ${_Example_CommonResources})
find_package(imgui REQUIRED)
find_package(imgui_node_editor REQUIRED)
target_link_libraries(${name} PRIVATE imgui imgui_node_editor application)
set(_ExampleBinDir ${CMAKE_BINARY_DIR}/bin)
set_target_properties(${name} PROPERTIES
FOLDER "examples"
RUNTIME_OUTPUT_DIRECTORY "${_ExampleBinDir}"
RUNTIME_OUTPUT_DIRECTORY_DEBUG "${_ExampleBinDir}"
RUNTIME_OUTPUT_DIRECTORY_RELWITHDEBINFO "${_ExampleBinDir}"
RUNTIME_OUTPUT_DIRECTORY_MINSIZEREL "${_ExampleBinDir}"
RUNTIME_OUTPUT_DIRECTORY_RELEASE "${_ExampleBinDir}"
DEBUG_POSTFIX _d
RELWITHDEBINGO_POSTFIX _rd
MINSIZEREL_POSTFIX _r
VS_DEBUGGER_WORKING_DIRECTORY ${_ExampleBinDir}
MACOSX_BUNDLE_INFO_PLIST "${IMGUI_NODE_EDITOR_ROOT_DIR}/examples/application/support/Info.plist.in"
MACOSX_BUNDLE_BUNDLE_NAME "${PACKAGE_NAME}"
MACOSX_BUNDLE_GUI_IDENTIFIER "com.sandbox.collisions"
MACOSX_BUNDLE_LONG_VERSION_STRING "${PACKAGE_VERSION}"
MACOSX_BUNDLE_SHORT_VERSION_STRING "${PACKAGE_VERSION_MAJOR}.${PACKAGE_VERSION_MINOR}"
MACOSX_BUNDLE_ICON_FILE Icon.icns
)
add_custom_command(
TARGET ${name}
PRE_BUILD
COMMAND ${CMAKE_COMMAND} -E make_directory ARGS ${_ExampleBinDir}/data
)
set(_ResourceRoot ${CMAKE_CURRENT_SOURCE_DIR})
foreach(_Resource ROOT "${IMGUI_NODE_EDITOR_ROOT_DIR}/examples/data" ${_Example_CommonResources} ROOT "${CMAKE_CURRENT_SOURCE_DIR}/data" ${_Example_Resources})
if (_Resource STREQUAL ROOT)
set(_ResourceRoot FALSE)
continue()
elseif(NOT _ResourceRoot)
set(_ResourceRoot ${_Resource})
continue()
endif()
if ("${_Resource}" MATCHES "\.DS_Store$")
list(REMOVE_ITEM _Example_Resources ${_Resource})
list(REMOVE_ITEM _Example_CommonResources ${_Resource})
continue()
endif()
file(RELATIVE_PATH _RelResource ${_ResourceRoot} ${_Resource})
add_custom_command(
TARGET ${name}
PRE_BUILD
COMMAND ${CMAKE_COMMAND} -E copy_if_different ARGS ${_Resource} ${_ExampleBinDir}/data/${_RelResource}
)
endforeach()
endmacro()
add_subdirectory(application)
add_subdirectory(canvas-example)
add_subdirectory(simple-example)
add_subdirectory(widgets-example)
add_subdirectory(basic-interaction-example)
add_subdirectory(blueprints-example)

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project(application)
set(_Application_Sources
include/application.h
source/application.cpp
source/entry_point.cpp
source/imgui_extra_keys.h
source/config.h.in
source/setup.h
source/platform.h
source/platform_win32.cpp
source/platform_glfw.cpp
source/renderer.h
source/renderer_dx11.cpp
source/renderer_ogl3.cpp
)
add_library(application STATIC)
target_include_directories(application PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/include)
find_package(imgui REQUIRED)
find_package(stb_image REQUIRED)
find_package(ScopeGuard REQUIRED)
target_link_libraries(application PUBLIC imgui)
target_link_libraries(application PRIVATE stb_image ScopeGuard)
if (WIN32)
list(APPEND _Application_Sources
source/imgui_impl_dx11.cpp
source/imgui_impl_dx11.h
source/imgui_impl_win32.cpp
source/imgui_impl_win32.h
)
set(_DXSDK_Dir ${IMGUI_NODE_EDITOR_ROOT_DIR}/external/DXSDK)
set(_DXSDK_Arch x86)
if (${CMAKE_SIZEOF_VOID_P} EQUAL 8)
set(_DXSDK_Arch x64)
endif()
add_library(dxerr STATIC ${_DXSDK_Dir}/src/dxerr.cpp)
target_include_directories(dxerr PUBLIC "${_DXSDK_Dir}/include")
set_property(TARGET dxerr PROPERTY FOLDER "external")
add_library(d3dx11 UNKNOWN IMPORTED)
set_target_properties(d3dx11 PROPERTIES
IMPORTED_LOCATION "${_DXSDK_Dir}/lib/${_DXSDK_Arch}/d3dx11.lib"
IMPORTED_LOCATION_DEBUG "${_DXSDK_Dir}/lib/${_DXSDK_Arch}/d3dx11d.lib"
INTERFACE_INCLUDE_DIRECTORIES "${_DXSDK_Dir}/include"
INTERFACE_LINK_LIBRARIES "$<$<CONFIG:Debug>:dxerr>"
)
target_link_libraries(application PRIVATE d3d11.lib d3dcompiler.lib d3dx11)
else()
find_package(OpenGL REQUIRED)
find_package(glfw3 3 REQUIRED)
if (APPLE)
target_link_libraries(application PRIVATE
"-framework CoreFoundation"
"-framework Cocoa"
"-framework IOKit"
"-framework CoreVideo"
)
endif()
endif()
if (OpenGL_FOUND)
set(HAVE_OPENGL YES)
find_package(gl3w REQUIRED)
# Explicitly select embedded GL3W loader
target_compile_definitions(application PRIVATE IMGUI_IMPL_OPENGL_LOADER_GL3W)
target_include_directories(application PRIVATE ${OPENGL_INCLUDE_DIR})
target_link_libraries(application PRIVATE ${OPENGL_gl_LIBRARY} gl3w)
list(APPEND _Application_Sources
source/imgui_impl_opengl3.cpp
source/imgui_impl_opengl3.h
)
endif()
if (glfw3_FOUND)
set(HAVE_GLFW3 YES)
list(APPEND _Application_Sources
source/imgui_impl_glfw.cpp
source/imgui_impl_glfw.h
)
target_link_libraries(application PRIVATE
glfw
)
endif()
configure_file(
source/config.h.in
${CMAKE_CURRENT_BINARY_DIR}/source/config.h
)
target_compile_definitions(application PRIVATE
#BACKEND_CONFIG=IMGUI_GLFW
#RENDERER_CONFIG=IMGUI_OGL3
)
target_include_directories(application PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/source)
source_group(TREE "${CMAKE_CURRENT_SOURCE_DIR}" FILES ${_Application_Sources})
target_sources(application PRIVATE ${_Application_Sources})
set_property(TARGET application PROPERTY FOLDER "examples")

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# pragma once
# include <imgui.h>
# include <string>
# include <memory>
struct Platform;
struct Renderer;
struct Application
{
Application(const char* name);
Application(const char* name, int argc, char** argv);
~Application();
bool Create(int width = -1, int height = -1);
int Run();
void SetTitle(const char* title);
bool Close();
void Quit();
const std::string& GetName() const;
ImFont* DefaultFont() const;
ImFont* HeaderFont() const;
ImTextureID LoadTexture(const char* path);
ImTextureID CreateTexture(const void* data, int width, int height);
void DestroyTexture(ImTextureID texture);
int GetTextureWidth(ImTextureID texture);
int GetTextureHeight(ImTextureID texture);
virtual void OnStart() {}
virtual void OnStop() {}
virtual void OnFrame(float deltaTime) {}
virtual ImGuiWindowFlags GetWindowFlags() const;
virtual bool CanClose() { return true; }
private:
void RecreateFontAtlas();
void Frame();
std::string m_Name;
std::string m_IniFilename;
std::unique_ptr<Platform> m_Platform;
std::unique_ptr<Renderer> m_Renderer;
ImGuiContext* m_Context = nullptr;
ImFont* m_DefaultFont = nullptr;
ImFont* m_HeaderFont = nullptr;
};
int Main(int argc, char** argv);

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# include "application.h"
# include "setup.h"
# include "platform.h"
# include "renderer.h"
extern "C" {
#define STB_IMAGE_IMPLEMENTATION
#define STB_IMAGE_STATIC
#include "stb_image.h"
}
Application::Application(const char* name)
: Application(name, 0, nullptr)
{
}
Application::Application(const char* name, int argc, char** argv)
: m_Name(name)
, m_Platform(CreatePlatform(*this))
, m_Renderer(CreateRenderer())
{
m_Platform->ApplicationStart(argc, argv);
}
Application::~Application()
{
m_Renderer->Destroy();
m_Platform->ApplicationStop();
if (m_Context)
{
ImGui::DestroyContext(m_Context);
m_Context= nullptr;
}
}
bool Application::Create(int width /*= -1*/, int height /*= -1*/)
{
m_Context = ImGui::CreateContext();
ImGui::SetCurrentContext(m_Context);
if (!m_Platform->OpenMainWindow("Application", width, height))
return false;
if (!m_Renderer->Create(*m_Platform))
return false;
m_IniFilename = m_Name + ".ini";
ImGuiIO& io = ImGui::GetIO();
//io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls
io.IniFilename = m_IniFilename.c_str();
io.LogFilename = nullptr;
ImGui::StyleColorsDark();
RecreateFontAtlas();
m_Platform->AcknowledgeWindowScaleChanged();
m_Platform->AcknowledgeFramebufferScaleChanged();
OnStart();
Frame();
return true;
}
int Application::Run()
{
m_Platform->ShowMainWindow();
while (m_Platform->ProcessMainWindowEvents())
{
if (!m_Platform->IsMainWindowVisible())
continue;
Frame();
}
OnStop();
return 0;
}
void Application::RecreateFontAtlas()
{
ImGuiIO& io = ImGui::GetIO();
IM_DELETE(io.Fonts);
io.Fonts = IM_NEW(ImFontAtlas);
ImFontConfig config;
config.OversampleH = 4;
config.OversampleV = 4;
config.PixelSnapH = false;
m_DefaultFont = io.Fonts->AddFontFromFileTTF("data/Play-Regular.ttf", 18.0f, &config);
m_HeaderFont = io.Fonts->AddFontFromFileTTF("data/Cuprum-Bold.ttf", 20.0f, &config);
io.Fonts->Build();
}
void Application::Frame()
{
auto& io = ImGui::GetIO();
if (m_Platform->HasWindowScaleChanged())
m_Platform->AcknowledgeWindowScaleChanged();
if (m_Platform->HasFramebufferScaleChanged())
{
RecreateFontAtlas();
m_Platform->AcknowledgeFramebufferScaleChanged();
}
const float windowScale = m_Platform->GetWindowScale();
const float framebufferScale = m_Platform->GetFramebufferScale();
if (io.WantSetMousePos)
{
io.MousePos.x *= windowScale;
io.MousePos.y *= windowScale;
}
m_Platform->NewFrame();
// Don't touch "uninitialized" mouse position
if (io.MousePos.x > -FLT_MAX && io.MousePos.y > -FLT_MAX)
{
io.MousePos.x /= windowScale;
io.MousePos.y /= windowScale;
}
io.DisplaySize.x /= windowScale;
io.DisplaySize.y /= windowScale;
io.DisplayFramebufferScale.x = framebufferScale;
io.DisplayFramebufferScale.y = framebufferScale;
m_Renderer->NewFrame();
ImGui::NewFrame();
ImGui::SetNextWindowPos(ImVec2(0, 0));
ImGui::SetNextWindowSize(io.DisplaySize);
const auto windowBorderSize = ImGui::GetStyle().WindowBorderSize;
const auto windowRounding = ImGui::GetStyle().WindowRounding;
ImGui::PushStyleVar(ImGuiStyleVar_WindowBorderSize, 0.0f);
ImGui::PushStyleVar(ImGuiStyleVar_WindowRounding, 0.0f);
ImGui::Begin("Content", nullptr, GetWindowFlags());
ImGui::PushStyleVar(ImGuiStyleVar_WindowBorderSize, windowBorderSize);
ImGui::PushStyleVar(ImGuiStyleVar_WindowRounding, windowRounding);
OnFrame(io.DeltaTime);
ImGui::PopStyleVar(2);
ImGui::End();
ImGui::PopStyleVar(2);
// Rendering
m_Renderer->Clear(ImColor(32, 32, 32, 255));
ImGui::Render();
m_Renderer->RenderDrawData(ImGui::GetDrawData());
m_Platform->FinishFrame();
}
void Application::SetTitle(const char* title)
{
m_Platform->SetMainWindowTitle(title);
}
bool Application::Close()
{
return m_Platform->CloseMainWindow();
}
void Application::Quit()
{
m_Platform->Quit();
}
const std::string& Application::GetName() const
{
return m_Name;
}
ImFont* Application::DefaultFont() const
{
return m_DefaultFont;
}
ImFont* Application::HeaderFont() const
{
return m_HeaderFont;
}
ImTextureID Application::LoadTexture(const char* path)
{
int width = 0, height = 0, component = 0;
if (auto data = stbi_load(path, &width, &height, &component, 4))
{
auto texture = CreateTexture(data, width, height);
stbi_image_free(data);
return texture;
}
else
return nullptr;
}
ImTextureID Application::CreateTexture(const void* data, int width, int height)
{
return m_Renderer->CreateTexture(data, width, height);
}
void Application::DestroyTexture(ImTextureID texture)
{
m_Renderer->DestroyTexture(texture);
}
int Application::GetTextureWidth(ImTextureID texture)
{
return m_Renderer->GetTextureWidth(texture);
}
int Application::GetTextureHeight(ImTextureID texture)
{
return m_Renderer->GetTextureHeight(texture);
}
ImGuiWindowFlags Application::GetWindowFlags() const
{
return
ImGuiWindowFlags_NoTitleBar |
ImGuiWindowFlags_NoResize |
ImGuiWindowFlags_NoMove |
ImGuiWindowFlags_NoScrollbar |
ImGuiWindowFlags_NoScrollWithMouse |
ImGuiWindowFlags_NoSavedSettings |
ImGuiWindowFlags_NoBringToFrontOnFocus;
}

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# pragma once
# cmakedefine01 HAVE_GLFW3
# cmakedefine01 HAVE_OPENGL

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# include "application.h"
# include "platform.h"
# if PLATFORM(WINDOWS)
# define NOMINMAX
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
# include <stdlib.h> // __argc, argv
# endif
# if defined(_WIN32) && !defined(_CONSOLE)
int WINAPI WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPSTR lpCmdLine, _In_ int nShowCmd)
{
return Main(__argc, __argv);
}
# else
int main(int argc, char** argv)
{
return Main(argc, argv);
}
# endif

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# pragma once
# include <imgui.h>
# include <type_traits>
// https://stackoverflow.com/a/8597498
# define DECLARE_HAS_NESTED(Name, Member) \
\
template<class T> \
struct has_nested_ ## Name \
{ \
typedef char yes; \
typedef yes(&no)[2]; \
\
template<class U> static yes test(decltype(U::Member)*); \
template<class U> static no test(...); \
\
static bool const value = sizeof(test<T>(0)) == sizeof(yes); \
};
# define DECLARE_KEY_TESTER(Key) \
DECLARE_HAS_NESTED(Key, Key) \
struct KeyTester_ ## Key \
{ \
template <typename T> \
static int Get(typename std::enable_if<has_nested_ ## Key<ImGuiKey_>::value, T>::type*) \
{ \
return T::Key; \
} \
\
template <typename T> \
static int Get(typename std::enable_if<!has_nested_ ## Key<ImGuiKey_>::value, T>::type*) \
{ \
return -1; \
} \
}
DECLARE_KEY_TESTER(ImGuiKey_F);
DECLARE_KEY_TESTER(ImGuiKey_D);
static inline int GetEnumValueForF()
{
return KeyTester_ImGuiKey_F::Get<ImGuiKey_>(nullptr);
}
static inline int GetEnumValueForD()
{
return KeyTester_ImGuiKey_D::Get<ImGuiKey_>(nullptr);
}

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// dear imgui: Renderer for DirectX11
// This needs to be used along with a Platform Binding (e.g. Win32)
// Implemented features:
// [X] Renderer: User texture binding. Use 'ID3D11ShaderResourceView*' as ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
// [X] Renderer: Support for large meshes (64k+ vertices) with 16-bits indices.
// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp
// https://github.com/ocornut/imgui
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2019-05-29: DirectX11: Added support for large mesh (64K+ vertices), enable ImGuiBackendFlags_RendererHasVtxOffset flag.
// 2019-04-30: DirectX11: Added support for special ImDrawCallback_ResetRenderState callback to reset render state.
// 2018-12-03: Misc: Added #pragma comment statement to automatically link with d3dcompiler.lib when using D3DCompile().
// 2018-11-30: Misc: Setting up io.BackendRendererName so it can be displayed in the About Window.
// 2018-08-01: DirectX11: Querying for IDXGIFactory instead of IDXGIFactory1 to increase compatibility.
// 2018-07-13: DirectX11: Fixed unreleased resources in Init and Shutdown functions.
// 2018-06-08: Misc: Extracted imgui_impl_dx11.cpp/.h away from the old combined DX11+Win32 example.
// 2018-06-08: DirectX11: Use draw_data->DisplayPos and draw_data->DisplaySize to setup projection matrix and clipping rectangle.
// 2018-02-16: Misc: Obsoleted the io.RenderDrawListsFn callback and exposed ImGui_ImplDX11_RenderDrawData() in the .h file so you can call it yourself.
// 2018-02-06: Misc: Removed call to ImGui::Shutdown() which is not available from 1.60 WIP, user needs to call CreateContext/DestroyContext themselves.
// 2016-05-07: DirectX11: Disabling depth-write.
#include "imgui.h"
#include "imgui_impl_dx11.h"
// DirectX
struct IUnknown;
#include <stdio.h>
#include <d3d11.h>
#include <d3dcompiler.h>
#ifdef _MSC_VER
#pragma comment(lib, "d3dcompiler") // Automatically link with d3dcompiler.lib as we are using D3DCompile() below.
#endif
struct TEXTURE;
// DirectX data
static ID3D11Device* g_pd3dDevice = NULL;
static ID3D11DeviceContext* g_pd3dDeviceContext = NULL;
static IDXGIFactory* g_pFactory = NULL;
static ID3D11Buffer* g_pVB = NULL;
static ID3D11Buffer* g_pIB = NULL;
static ID3D10Blob* g_pVertexShaderBlob = NULL;
static ID3D11VertexShader* g_pVertexShader = NULL;
static ID3D11InputLayout* g_pInputLayout = NULL;
static ID3D11Buffer* g_pVertexConstantBuffer = NULL;
static ID3D10Blob* g_pPixelShaderBlob = NULL;
static ID3D11PixelShader* g_pPixelShader = NULL;
static ID3D11SamplerState* g_pFontSampler = NULL;
static ImTextureID g_pFontTextureID = NULL;
static ID3D11RasterizerState* g_pRasterizerState = NULL;
static ID3D11BlendState* g_pBlendState = NULL;
static ID3D11DepthStencilState* g_pDepthStencilState = NULL;
static int g_VertexBufferSize = 5000, g_IndexBufferSize = 10000;
static ImVector<TEXTURE*> g_Textures;
struct VERTEX_CONSTANT_BUFFER
{
float mvp[4][4];
};
struct TEXTURE
{
TEXTURE()
{
View = NULL;
Width = 0;
Height = 0;
}
ID3D11ShaderResourceView* View;
int Width;
int Height;
ImVector<unsigned char> Data;
};
// Forward Declarations
static bool ImGui_UploadTexture(TEXTURE* texture);
static void ImGui_ReleaseTexture(TEXTURE* texture);
static void ImGui_ImplDX11_SetupRenderState(ImDrawData* draw_data, ID3D11DeviceContext* ctx)
{
// Setup viewport
D3D11_VIEWPORT vp;
memset(&vp, 0, sizeof(D3D11_VIEWPORT));
vp.Width = draw_data->DisplaySize.x * draw_data->FramebufferScale.x;
vp.Height = draw_data->DisplaySize.y * draw_data->FramebufferScale.y;
vp.MinDepth = 0.0f;
vp.MaxDepth = 1.0f;
vp.TopLeftX = vp.TopLeftY = 0;
ctx->RSSetViewports(1, &vp);
// Setup shader and vertex buffers
unsigned int stride = sizeof(ImDrawVert);
unsigned int offset = 0;
ctx->IASetInputLayout(g_pInputLayout);
ctx->IASetVertexBuffers(0, 1, &g_pVB, &stride, &offset);
ctx->IASetIndexBuffer(g_pIB, sizeof(ImDrawIdx) == 2 ? DXGI_FORMAT_R16_UINT : DXGI_FORMAT_R32_UINT, 0);
ctx->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
ctx->VSSetShader(g_pVertexShader, NULL, 0);
ctx->VSSetConstantBuffers(0, 1, &g_pVertexConstantBuffer);
ctx->PSSetShader(g_pPixelShader, NULL, 0);
ctx->PSSetSamplers(0, 1, &g_pFontSampler);
// Setup blend state
const float blend_factor[4] = { 0.f, 0.f, 0.f, 0.f };
ctx->OMSetBlendState(g_pBlendState, blend_factor, 0xffffffff);
ctx->OMSetDepthStencilState(g_pDepthStencilState, 0);
ctx->RSSetState(g_pRasterizerState);
}
// Render function
// (this used to be set in io.RenderDrawListsFn and called by ImGui::Render(), but you can now call this directly from your main loop)
void ImGui_ImplDX11_RenderDrawData(ImDrawData* draw_data)
{
// Avoid rendering when minimized
if (draw_data->DisplaySize.x <= 0.0f || draw_data->DisplaySize.y <= 0.0f)
return;
ID3D11DeviceContext* ctx = g_pd3dDeviceContext;
// Create and grow vertex/index buffers if needed
if (!g_pVB || g_VertexBufferSize < draw_data->TotalVtxCount)
{
if (g_pVB) { g_pVB->Release(); g_pVB = NULL; }
g_VertexBufferSize = draw_data->TotalVtxCount + 5000;
D3D11_BUFFER_DESC desc;
memset(&desc, 0, sizeof(D3D11_BUFFER_DESC));
desc.Usage = D3D11_USAGE_DYNAMIC;
desc.ByteWidth = g_VertexBufferSize * sizeof(ImDrawVert);
desc.BindFlags = D3D11_BIND_VERTEX_BUFFER;
desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
desc.MiscFlags = 0;
if (g_pd3dDevice->CreateBuffer(&desc, NULL, &g_pVB) < 0)
return;
}
if (!g_pIB || g_IndexBufferSize < draw_data->TotalIdxCount)
{
if (g_pIB) { g_pIB->Release(); g_pIB = NULL; }
g_IndexBufferSize = draw_data->TotalIdxCount + 10000;
D3D11_BUFFER_DESC desc;
memset(&desc, 0, sizeof(D3D11_BUFFER_DESC));
desc.Usage = D3D11_USAGE_DYNAMIC;
desc.ByteWidth = g_IndexBufferSize * sizeof(ImDrawIdx);
desc.BindFlags = D3D11_BIND_INDEX_BUFFER;
desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
if (g_pd3dDevice->CreateBuffer(&desc, NULL, &g_pIB) < 0)
return;
}
// Upload vertex/index data into a single contiguous GPU buffer
D3D11_MAPPED_SUBRESOURCE vtx_resource, idx_resource;
if (ctx->Map(g_pVB, 0, D3D11_MAP_WRITE_DISCARD, 0, &vtx_resource) != S_OK)
return;
if (ctx->Map(g_pIB, 0, D3D11_MAP_WRITE_DISCARD, 0, &idx_resource) != S_OK)
return;
ImDrawVert* vtx_dst = (ImDrawVert*)vtx_resource.pData;
ImDrawIdx* idx_dst = (ImDrawIdx*)idx_resource.pData;
for (int n = 0; n < draw_data->CmdListsCount; n++)
{
const ImDrawList* cmd_list = draw_data->CmdLists[n];
memcpy(vtx_dst, cmd_list->VtxBuffer.Data, cmd_list->VtxBuffer.Size * sizeof(ImDrawVert));
memcpy(idx_dst, cmd_list->IdxBuffer.Data, cmd_list->IdxBuffer.Size * sizeof(ImDrawIdx));
vtx_dst += cmd_list->VtxBuffer.Size;
idx_dst += cmd_list->IdxBuffer.Size;
}
ctx->Unmap(g_pVB, 0);
ctx->Unmap(g_pIB, 0);
// Setup orthographic projection matrix into our constant buffer
// Our visible imgui space lies from draw_data->DisplayPos (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right). DisplayPos is (0,0) for single viewport apps.
{
D3D11_MAPPED_SUBRESOURCE mapped_resource;
if (ctx->Map(g_pVertexConstantBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mapped_resource) != S_OK)
return;
VERTEX_CONSTANT_BUFFER* constant_buffer = (VERTEX_CONSTANT_BUFFER*)mapped_resource.pData;
float L = draw_data->DisplayPos.x;
float R = draw_data->DisplayPos.x + draw_data->DisplaySize.x;
float T = draw_data->DisplayPos.y;
float B = draw_data->DisplayPos.y + draw_data->DisplaySize.y;
float mvp[4][4] =
{
{ 2.0f/(R-L), 0.0f, 0.0f, 0.0f },
{ 0.0f, 2.0f/(T-B), 0.0f, 0.0f },
{ 0.0f, 0.0f, 0.5f, 0.0f },
{ (R+L)/(L-R), (T+B)/(B-T), 0.5f, 1.0f },
};
memcpy(&constant_buffer->mvp, mvp, sizeof(mvp));
ctx->Unmap(g_pVertexConstantBuffer, 0);
}
// Backup DX state that will be modified to restore it afterwards (unfortunately this is very ugly looking and verbose. Close your eyes!)
struct BACKUP_DX11_STATE
{
UINT ScissorRectsCount, ViewportsCount;
D3D11_RECT ScissorRects[D3D11_VIEWPORT_AND_SCISSORRECT_OBJECT_COUNT_PER_PIPELINE];
D3D11_VIEWPORT Viewports[D3D11_VIEWPORT_AND_SCISSORRECT_OBJECT_COUNT_PER_PIPELINE];
ID3D11RasterizerState* RS;
ID3D11BlendState* BlendState;
FLOAT BlendFactor[4];
UINT SampleMask;
UINT StencilRef;
ID3D11DepthStencilState* DepthStencilState;
ID3D11ShaderResourceView* PSShaderResource;
ID3D11SamplerState* PSSampler;
ID3D11PixelShader* PS;
ID3D11VertexShader* VS;
UINT PSInstancesCount, VSInstancesCount;
ID3D11ClassInstance* PSInstances[256], *VSInstances[256]; // 256 is max according to PSSetShader documentation
D3D11_PRIMITIVE_TOPOLOGY PrimitiveTopology;
ID3D11Buffer* IndexBuffer, *VertexBuffer, *VSConstantBuffer;
UINT IndexBufferOffset, VertexBufferStride, VertexBufferOffset;
DXGI_FORMAT IndexBufferFormat;
ID3D11InputLayout* InputLayout;
};
BACKUP_DX11_STATE old;
old.ScissorRectsCount = old.ViewportsCount = D3D11_VIEWPORT_AND_SCISSORRECT_OBJECT_COUNT_PER_PIPELINE;
ctx->RSGetScissorRects(&old.ScissorRectsCount, old.ScissorRects);
ctx->RSGetViewports(&old.ViewportsCount, old.Viewports);
ctx->RSGetState(&old.RS);
ctx->OMGetBlendState(&old.BlendState, old.BlendFactor, &old.SampleMask);
ctx->OMGetDepthStencilState(&old.DepthStencilState, &old.StencilRef);
ctx->PSGetShaderResources(0, 1, &old.PSShaderResource);
ctx->PSGetSamplers(0, 1, &old.PSSampler);
old.PSInstancesCount = old.VSInstancesCount = 256;
ctx->PSGetShader(&old.PS, old.PSInstances, &old.PSInstancesCount);
ctx->VSGetShader(&old.VS, old.VSInstances, &old.VSInstancesCount);
ctx->VSGetConstantBuffers(0, 1, &old.VSConstantBuffer);
ctx->IAGetPrimitiveTopology(&old.PrimitiveTopology);
ctx->IAGetIndexBuffer(&old.IndexBuffer, &old.IndexBufferFormat, &old.IndexBufferOffset);
ctx->IAGetVertexBuffers(0, 1, &old.VertexBuffer, &old.VertexBufferStride, &old.VertexBufferOffset);
ctx->IAGetInputLayout(&old.InputLayout);
// Setup desired DX state
ImGui_ImplDX11_SetupRenderState(draw_data, ctx);
// Render command lists
// (Because we merged all buffers into a single one, we maintain our own offset into them)
int global_idx_offset = 0;
int global_vtx_offset = 0;
// Will project scissor/clipping rectangles into framebuffer space
ImVec2 clip_off = draw_data->DisplayPos; // (0,0) unless using multi-viewports
ImVec2 clip_scale = draw_data->FramebufferScale; // (1,1) unless using retina display which are often (2,2)
for (int n = 0; n < draw_data->CmdListsCount; n++)
{
const ImDrawList* cmd_list = draw_data->CmdLists[n];
for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
{
const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
if (pcmd->UserCallback != NULL)
{
// User callback, registered via ImDrawList::AddCallback()
// (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
ImGui_ImplDX11_SetupRenderState(draw_data, ctx);
else
pcmd->UserCallback(cmd_list, pcmd);
}
else
{
ImVec4 clip_rect;
clip_rect.x = (pcmd->ClipRect.x - clip_off.x) * clip_scale.x;
clip_rect.y = (pcmd->ClipRect.y - clip_off.y) * clip_scale.y;
clip_rect.z = (pcmd->ClipRect.z - clip_off.x) * clip_scale.x;
clip_rect.w = (pcmd->ClipRect.w - clip_off.y) * clip_scale.y;
// Apply scissor/clipping rectangle
const D3D11_RECT r = { (LONG)clip_rect.x, (LONG)clip_rect.y, (LONG)clip_rect.z, (LONG)clip_rect.w };
ctx->RSSetScissorRects(1, &r);
// Bind texture, Draw
TEXTURE* texture = (TEXTURE*)pcmd->TextureId;
ID3D11ShaderResourceView* textureView = texture ? texture->View : nullptr;
ctx->PSSetShaderResources(0, 1, &textureView);
ctx->DrawIndexed(pcmd->ElemCount, pcmd->IdxOffset + global_idx_offset, pcmd->VtxOffset + global_vtx_offset);
}
}
global_idx_offset += cmd_list->IdxBuffer.Size;
global_vtx_offset += cmd_list->VtxBuffer.Size;
}
// Restore modified DX state
ctx->RSSetScissorRects(old.ScissorRectsCount, old.ScissorRects);
ctx->RSSetViewports(old.ViewportsCount, old.Viewports);
ctx->RSSetState(old.RS); if (old.RS) old.RS->Release();
ctx->OMSetBlendState(old.BlendState, old.BlendFactor, old.SampleMask); if (old.BlendState) old.BlendState->Release();
ctx->OMSetDepthStencilState(old.DepthStencilState, old.StencilRef); if (old.DepthStencilState) old.DepthStencilState->Release();
ctx->PSSetShaderResources(0, 1, &old.PSShaderResource); if (old.PSShaderResource) old.PSShaderResource->Release();
ctx->PSSetSamplers(0, 1, &old.PSSampler); if (old.PSSampler) old.PSSampler->Release();
ctx->PSSetShader(old.PS, old.PSInstances, old.PSInstancesCount); if (old.PS) old.PS->Release();
for (UINT i = 0; i < old.PSInstancesCount; i++) if (old.PSInstances[i]) old.PSInstances[i]->Release();
ctx->VSSetShader(old.VS, old.VSInstances, old.VSInstancesCount); if (old.VS) old.VS->Release();
ctx->VSSetConstantBuffers(0, 1, &old.VSConstantBuffer); if (old.VSConstantBuffer) old.VSConstantBuffer->Release();
for (UINT i = 0; i < old.VSInstancesCount; i++) if (old.VSInstances[i]) old.VSInstances[i]->Release();
ctx->IASetPrimitiveTopology(old.PrimitiveTopology);
ctx->IASetIndexBuffer(old.IndexBuffer, old.IndexBufferFormat, old.IndexBufferOffset); if (old.IndexBuffer) old.IndexBuffer->Release();
ctx->IASetVertexBuffers(0, 1, &old.VertexBuffer, &old.VertexBufferStride, &old.VertexBufferOffset); if (old.VertexBuffer) old.VertexBuffer->Release();
ctx->IASetInputLayout(old.InputLayout); if (old.InputLayout) old.InputLayout->Release();
}
static void ImGui_ImplDX11_CreateFontsTexture()
{
// Build texture atlas
ImGuiIO& io = ImGui::GetIO();
unsigned char* pixels;
int width, height;
io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
g_pFontTextureID = ImGui_CreateTexture(pixels, width, height);
io.Fonts->TexID = g_pFontTextureID;
// Create texture sampler
{
D3D11_SAMPLER_DESC desc;
ZeroMemory(&desc, sizeof(desc));
desc.Filter = D3D11_FILTER_MIN_MAG_MIP_LINEAR;
desc.AddressU = D3D11_TEXTURE_ADDRESS_WRAP;
desc.AddressV = D3D11_TEXTURE_ADDRESS_WRAP;
desc.AddressW = D3D11_TEXTURE_ADDRESS_WRAP;
desc.MipLODBias = 0.f;
desc.ComparisonFunc = D3D11_COMPARISON_ALWAYS;
desc.MinLOD = 0.f;
desc.MaxLOD = 0.f;
g_pd3dDevice->CreateSamplerState(&desc, &g_pFontSampler);
}
}
bool ImGui_ImplDX11_CreateDeviceObjects()
{
if (!g_pd3dDevice)
return false;
if (g_pFontSampler)
ImGui_ImplDX11_InvalidateDeviceObjects();
// By using D3DCompile() from <d3dcompiler.h> / d3dcompiler.lib, we introduce a dependency to a given version of d3dcompiler_XX.dll (see D3DCOMPILER_DLL_A)
// If you would like to use this DX11 sample code but remove this dependency you can:
// 1) compile once, save the compiled shader blobs into a file or source code and pass them to CreateVertexShader()/CreatePixelShader() [preferred solution]
// 2) use code to detect any version of the DLL and grab a pointer to D3DCompile from the DLL.
// See https://github.com/ocornut/imgui/pull/638 for sources and details.
// Create the vertex shader
{
static const char* vertexShader =
"cbuffer vertexBuffer : register(b0) \
{\
float4x4 ProjectionMatrix; \
};\
struct VS_INPUT\
{\
float2 pos : POSITION;\
float4 col : COLOR0;\
float2 uv : TEXCOORD0;\
};\
\
struct PS_INPUT\
{\
float4 pos : SV_POSITION;\
float4 col : COLOR0;\
float2 uv : TEXCOORD0;\
};\
\
PS_INPUT main(VS_INPUT input)\
{\
PS_INPUT output;\
output.pos = mul( ProjectionMatrix, float4(input.pos.xy, 0.f, 1.f));\
output.col = input.col;\
output.uv = input.uv;\
return output;\
}";
D3DCompile(vertexShader, strlen(vertexShader), NULL, NULL, NULL, "main", "vs_4_0", 0, 0, &g_pVertexShaderBlob, NULL);
if (g_pVertexShaderBlob == NULL) // NB: Pass ID3D10Blob* pErrorBlob to D3DCompile() to get error showing in (const char*)pErrorBlob->GetBufferPointer(). Make sure to Release() the blob!
return false;
if (g_pd3dDevice->CreateVertexShader((DWORD*)g_pVertexShaderBlob->GetBufferPointer(), g_pVertexShaderBlob->GetBufferSize(), NULL, &g_pVertexShader) != S_OK)
return false;
// Create the input layout
D3D11_INPUT_ELEMENT_DESC local_layout[] =
{
{ "POSITION", 0, DXGI_FORMAT_R32G32_FLOAT, 0, (size_t)(&((ImDrawVert*)0)->pos), D3D11_INPUT_PER_VERTEX_DATA, 0 },
{ "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, (size_t)(&((ImDrawVert*)0)->uv), D3D11_INPUT_PER_VERTEX_DATA, 0 },
{ "COLOR", 0, DXGI_FORMAT_R8G8B8A8_UNORM, 0, (size_t)(&((ImDrawVert*)0)->col), D3D11_INPUT_PER_VERTEX_DATA, 0 },
};
if (g_pd3dDevice->CreateInputLayout(local_layout, 3, g_pVertexShaderBlob->GetBufferPointer(), g_pVertexShaderBlob->GetBufferSize(), &g_pInputLayout) != S_OK)
return false;
// Create the constant buffer
{
D3D11_BUFFER_DESC desc;
desc.ByteWidth = sizeof(VERTEX_CONSTANT_BUFFER);
desc.Usage = D3D11_USAGE_DYNAMIC;
desc.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
desc.MiscFlags = 0;
g_pd3dDevice->CreateBuffer(&desc, NULL, &g_pVertexConstantBuffer);
}
}
// Create the pixel shader
{
static const char* pixelShader =
"struct PS_INPUT\
{\
float4 pos : SV_POSITION;\
float4 col : COLOR0;\
float2 uv : TEXCOORD0;\
};\
sampler sampler0;\
Texture2D texture0;\
\
float4 main(PS_INPUT input) : SV_Target\
{\
float4 out_col = input.col * texture0.Sample(sampler0, input.uv); \
out_col.rgb *= out_col.a; \
return out_col; \
}";
D3DCompile(pixelShader, strlen(pixelShader), NULL, NULL, NULL, "main", "ps_4_0", 0, 0, &g_pPixelShaderBlob, NULL);
if (g_pPixelShaderBlob == NULL) // NB: Pass ID3D10Blob* pErrorBlob to D3DCompile() to get error showing in (const char*)pErrorBlob->GetBufferPointer(). Make sure to Release() the blob!
return false;
if (g_pd3dDevice->CreatePixelShader((DWORD*)g_pPixelShaderBlob->GetBufferPointer(), g_pPixelShaderBlob->GetBufferSize(), NULL, &g_pPixelShader) != S_OK)
return false;
}
// Create the blending setup
{
D3D11_BLEND_DESC desc;
ZeroMemory(&desc, sizeof(desc));
desc.AlphaToCoverageEnable = false;
desc.RenderTarget[0].BlendEnable = true;
desc.RenderTarget[0].SrcBlend = D3D11_BLEND_ONE;
desc.RenderTarget[0].DestBlend = D3D11_BLEND_INV_SRC_ALPHA;
desc.RenderTarget[0].BlendOp = D3D11_BLEND_OP_ADD;
desc.RenderTarget[0].SrcBlendAlpha = D3D11_BLEND_ONE;
desc.RenderTarget[0].DestBlendAlpha = D3D11_BLEND_ZERO;
desc.RenderTarget[0].BlendOpAlpha = D3D11_BLEND_OP_ADD;
desc.RenderTarget[0].RenderTargetWriteMask = D3D11_COLOR_WRITE_ENABLE_ALL;
g_pd3dDevice->CreateBlendState(&desc, &g_pBlendState);
}
// Create the rasterizer state
{
D3D11_RASTERIZER_DESC desc;
ZeroMemory(&desc, sizeof(desc));
desc.FillMode = D3D11_FILL_SOLID;
desc.CullMode = D3D11_CULL_NONE;
desc.ScissorEnable = true;
desc.DepthClipEnable = true;
g_pd3dDevice->CreateRasterizerState(&desc, &g_pRasterizerState);
}
// Create depth-stencil State
{
D3D11_DEPTH_STENCIL_DESC desc;
ZeroMemory(&desc, sizeof(desc));
desc.DepthEnable = false;
desc.DepthWriteMask = D3D11_DEPTH_WRITE_MASK_ALL;
desc.DepthFunc = D3D11_COMPARISON_ALWAYS;
desc.StencilEnable = false;
desc.FrontFace.StencilFailOp = desc.FrontFace.StencilDepthFailOp = desc.FrontFace.StencilPassOp = D3D11_STENCIL_OP_KEEP;
desc.FrontFace.StencilFunc = D3D11_COMPARISON_ALWAYS;
desc.BackFace = desc.FrontFace;
g_pd3dDevice->CreateDepthStencilState(&desc, &g_pDepthStencilState);
}
ImGui_ImplDX11_CreateFontsTexture();
for (auto& texture : g_Textures)
ImGui_UploadTexture(texture);
return true;
}
void ImGui_ImplDX11_InvalidateDeviceObjects()
{
if (!g_pd3dDevice)
return;
for (auto& texture : g_Textures)
ImGui_ReleaseTexture(texture);
if (g_pFontTextureID)
{
ImGui_DestroyTexture(g_pFontTextureID);
g_pFontTextureID = NULL;
}
if (g_pFontSampler) { g_pFontSampler->Release(); g_pFontSampler = NULL; }
if (g_pIB) { g_pIB->Release(); g_pIB = NULL; }
if (g_pVB) { g_pVB->Release(); g_pVB = NULL; }
if (g_pBlendState) { g_pBlendState->Release(); g_pBlendState = NULL; }
if (g_pDepthStencilState) { g_pDepthStencilState->Release(); g_pDepthStencilState = NULL; }
if (g_pRasterizerState) { g_pRasterizerState->Release(); g_pRasterizerState = NULL; }
if (g_pPixelShader) { g_pPixelShader->Release(); g_pPixelShader = NULL; }
if (g_pPixelShaderBlob) { g_pPixelShaderBlob->Release(); g_pPixelShaderBlob = NULL; }
if (g_pVertexConstantBuffer) { g_pVertexConstantBuffer->Release(); g_pVertexConstantBuffer = NULL; }
if (g_pInputLayout) { g_pInputLayout->Release(); g_pInputLayout = NULL; }
if (g_pVertexShader) { g_pVertexShader->Release(); g_pVertexShader = NULL; }
if (g_pVertexShaderBlob) { g_pVertexShaderBlob->Release(); g_pVertexShaderBlob = NULL; }
}
bool ImGui_ImplDX11_Init(ID3D11Device* device, ID3D11DeviceContext* device_context)
{
// Setup back-end capabilities flags
ImGuiIO& io = ImGui::GetIO();
io.BackendRendererName = "imgui_impl_dx11";
io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset; // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
// Get factory from device
IDXGIDevice* pDXGIDevice = NULL;
IDXGIAdapter* pDXGIAdapter = NULL;
IDXGIFactory* pFactory = NULL;
if (device->QueryInterface(IID_PPV_ARGS(&pDXGIDevice)) == S_OK)
if (pDXGIDevice->GetParent(IID_PPV_ARGS(&pDXGIAdapter)) == S_OK)
if (pDXGIAdapter->GetParent(IID_PPV_ARGS(&pFactory)) == S_OK)
{
g_pd3dDevice = device;
g_pd3dDeviceContext = device_context;
g_pFactory = pFactory;
}
if (pDXGIDevice) pDXGIDevice->Release();
if (pDXGIAdapter) pDXGIAdapter->Release();
g_pd3dDevice->AddRef();
g_pd3dDeviceContext->AddRef();
g_Textures.reserve(16);
return true;
}
void ImGui_ImplDX11_Shutdown()
{
ImGui_ImplDX11_InvalidateDeviceObjects();
if (g_pFactory) { g_pFactory->Release(); g_pFactory = NULL; }
if (g_pd3dDevice) { g_pd3dDevice->Release(); g_pd3dDevice = NULL; }
if (g_pd3dDeviceContext) { g_pd3dDeviceContext->Release(); g_pd3dDeviceContext = NULL; }
}
void ImGui_ImplDX11_NewFrame()
{
if (!g_pFontSampler)
ImGui_ImplDX11_CreateDeviceObjects();
}
extern "C" {
#define STB_IMAGE_IMPLEMENTATION
#define STB_IMAGE_STATIC
#include "stb_image.h"
}
ImTextureID ImGui_LoadTexture(const char* path)
{
int width = 0, height = 0, component = 0;
if (auto data = stbi_load(path, &width, &height, &component, 4))
{
auto texture = ImGui_CreateTexture(data, width, height);
stbi_image_free(data);
return texture;
}
else
return nullptr;
}
ImTextureID ImGui_CreateTexture(const void* data, int width, int height)
{
auto texture = IM_NEW(TEXTURE);
texture->Width = width;
texture->Height = height;
texture->Data.resize(width * height * 4);
memcpy(texture->Data.Data, data, texture->Data.Size);
if (!ImGui_UploadTexture(texture))
{
IM_DELETE(texture);
return nullptr;
}
g_Textures.push_back(texture);
return (ImTextureID)texture;
}
void ImGui_DestroyTexture(ImTextureID texture)
{
if (!texture)
return;
TEXTURE* texture_object = (TEXTURE*)(texture);
ImGui_ReleaseTexture(texture_object);
for (TEXTURE** it = g_Textures.begin(), **itEnd = g_Textures.end(); it != itEnd; ++it)
{
if (*it == texture_object)
{
g_Textures.erase(it);
break;
}
}
IM_DELETE(texture_object);
}
static bool ImGui_UploadTexture(TEXTURE* texture)
{
if (!g_pd3dDevice || !texture)
return false;
if (texture->View)
return true;
D3D11_TEXTURE2D_DESC desc = {};
desc.Width = texture->Width;
desc.Height = texture->Height;
desc.MipLevels = 1;
desc.ArraySize = 1;
desc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
desc.SampleDesc.Count = 1;
desc.Usage = D3D11_USAGE_DEFAULT;
desc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
desc.CPUAccessFlags = 0;
D3D11_SUBRESOURCE_DATA subResource = {};
subResource.pSysMem = texture->Data.Data;
subResource.SysMemPitch = desc.Width * 4;
subResource.SysMemSlicePitch = 0;
ID3D11Texture2D *pTexture = nullptr;
g_pd3dDevice->CreateTexture2D(&desc, &subResource, &pTexture);
if (!pTexture)
return false;
// Create texture view
D3D11_SHADER_RESOURCE_VIEW_DESC srvDesc = {};
srvDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
srvDesc.ViewDimension = D3D11_SRV_DIMENSION_TEXTURE2D;
srvDesc.Texture2D.MipLevels = desc.MipLevels;
srvDesc.Texture2D.MostDetailedMip = 0;
g_pd3dDevice->CreateShaderResourceView(pTexture, &srvDesc, &texture->View);
pTexture->Release();
return true;
}
static void ImGui_ReleaseTexture(TEXTURE* texture)
{
if (texture)
{
if (texture->View)
{
texture->View->Release();
texture->View = nullptr;
}
}
}
int ImGui_GetTextureWidth(ImTextureID texture)
{
if (TEXTURE* tex = (TEXTURE*)(texture))
return tex->Width;
else
return 0;
}
int ImGui_GetTextureHeight(ImTextureID texture)
{
if (TEXTURE* tex = (TEXTURE*)(texture))
return tex->Height;
else
return 0;
}

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// dear imgui: Renderer for DirectX11
// This needs to be used along with a Platform Binding (e.g. Win32)
// Implemented features:
// [X] Renderer: User texture binding. Use 'ID3D11ShaderResourceView*' as ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp.
// https://github.com/ocornut/imgui
#pragma once
struct ID3D11Device;
struct ID3D11DeviceContext;
IMGUI_IMPL_API bool ImGui_ImplDX11_Init(ID3D11Device* device, ID3D11DeviceContext* device_context);
IMGUI_IMPL_API void ImGui_ImplDX11_Shutdown();
IMGUI_IMPL_API void ImGui_ImplDX11_NewFrame();
IMGUI_IMPL_API void ImGui_ImplDX11_RenderDrawData(ImDrawData* draw_data);
// Use if you want to reset your rendering device without losing ImGui state.
IMGUI_IMPL_API void ImGui_ImplDX11_InvalidateDeviceObjects();
IMGUI_IMPL_API bool ImGui_ImplDX11_CreateDeviceObjects();
IMGUI_IMPL_API ImTextureID ImGui_LoadTexture(const char* path);
IMGUI_IMPL_API ImTextureID ImGui_CreateTexture(const void* data, int width, int height);
IMGUI_IMPL_API void ImGui_DestroyTexture(ImTextureID texture);
IMGUI_IMPL_API int ImGui_GetTextureWidth(ImTextureID texture);
IMGUI_IMPL_API int ImGui_GetTextureHeight(ImTextureID texture);

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// dear imgui: Platform Binding for GLFW
// This needs to be used along with a Renderer (e.g. OpenGL3, Vulkan..)
// (Info: GLFW is a cross-platform general purpose library for handling windows, inputs, OpenGL/Vulkan graphics context creation, etc.)
// (Requires: GLFW 3.1+)
// Implemented features:
// [X] Platform: Clipboard support.
// [X] Platform: Gamepad support. Enable with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
// [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange' (note: the resizing cursors requires GLFW 3.4+).
// [X] Platform: Keyboard arrays indexed using GLFW_KEY_* codes, e.g. ImGui::IsKeyPressed(GLFW_KEY_SPACE).
// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp.
// https://github.com/ocornut/imgui
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2020-01-17: Inputs: Disable error callback while assigning mouse cursors because some X11 setup don't have them and it generates errors.
// 2019-12-05: Inputs: Added support for new mouse cursors added in GLFW 3.4+ (resizing cursors, not allowed cursor).
// 2019-10-18: Misc: Previously installed user callbacks are now restored on shutdown.
// 2019-07-21: Inputs: Added mapping for ImGuiKey_KeyPadEnter.
// 2019-05-11: Inputs: Don't filter value from character callback before calling AddInputCharacter().
// 2019-03-12: Misc: Preserve DisplayFramebufferScale when main window is minimized.
// 2018-11-30: Misc: Setting up io.BackendPlatformName so it can be displayed in the About Window.
// 2018-11-07: Inputs: When installing our GLFW callbacks, we save user's previously installed ones - if any - and chain call them.
// 2018-08-01: Inputs: Workaround for Emscripten which doesn't seem to handle focus related calls.
// 2018-06-29: Inputs: Added support for the ImGuiMouseCursor_Hand cursor.
// 2018-06-08: Misc: Extracted imgui_impl_glfw.cpp/.h away from the old combined GLFW+OpenGL/Vulkan examples.
// 2018-03-20: Misc: Setup io.BackendFlags ImGuiBackendFlags_HasMouseCursors flag + honor ImGuiConfigFlags_NoMouseCursorChange flag.
// 2018-02-20: Inputs: Added support for mouse cursors (ImGui::GetMouseCursor() value, passed to glfwSetCursor()).
// 2018-02-06: Misc: Removed call to ImGui::Shutdown() which is not available from 1.60 WIP, user needs to call CreateContext/DestroyContext themselves.
// 2018-02-06: Inputs: Added mapping for ImGuiKey_Space.
// 2018-01-25: Inputs: Added gamepad support if ImGuiConfigFlags_NavEnableGamepad is set.
// 2018-01-25: Inputs: Honoring the io.WantSetMousePos by repositioning the mouse (when using navigation and ImGuiConfigFlags_NavMoveMouse is set).
// 2018-01-20: Inputs: Added Horizontal Mouse Wheel support.
// 2018-01-18: Inputs: Added mapping for ImGuiKey_Insert.
// 2017-08-25: Inputs: MousePos set to -FLT_MAX,-FLT_MAX when mouse is unavailable/missing (instead of -1,-1).
// 2016-10-15: Misc: Added a void* user_data parameter to Clipboard function handlers.
#include "imgui.h"
#include "imgui_impl_glfw.h"
#include "imgui_extra_keys.h"
// GLFW
#include <GLFW/glfw3.h>
#ifdef _WIN32
#undef APIENTRY
#define GLFW_EXPOSE_NATIVE_WIN32
#include <GLFW/glfw3native.h> // for glfwGetWin32Window
#endif
#define GLFW_HAS_WINDOW_TOPMOST (GLFW_VERSION_MAJOR * 1000 + GLFW_VERSION_MINOR * 100 >= 3200) // 3.2+ GLFW_FLOATING
#define GLFW_HAS_WINDOW_HOVERED (GLFW_VERSION_MAJOR * 1000 + GLFW_VERSION_MINOR * 100 >= 3300) // 3.3+ GLFW_HOVERED
#define GLFW_HAS_WINDOW_ALPHA (GLFW_VERSION_MAJOR * 1000 + GLFW_VERSION_MINOR * 100 >= 3300) // 3.3+ glfwSetWindowOpacity
#define GLFW_HAS_PER_MONITOR_DPI (GLFW_VERSION_MAJOR * 1000 + GLFW_VERSION_MINOR * 100 >= 3300) // 3.3+ glfwGetMonitorContentScale
#define GLFW_HAS_VULKAN (GLFW_VERSION_MAJOR * 1000 + GLFW_VERSION_MINOR * 100 >= 3200) // 3.2+ glfwCreateWindowSurface
#ifdef GLFW_RESIZE_NESW_CURSOR // let's be nice to people who pulled GLFW between 2019-04-16 (3.4 define) and 2019-11-29 (cursors defines) // FIXME: Remove when GLFW 3.4 is released?
#define GLFW_HAS_NEW_CURSORS (GLFW_VERSION_MAJOR * 1000 + GLFW_VERSION_MINOR * 100 >= 3400) // 3.4+ GLFW_RESIZE_ALL_CURSOR, GLFW_RESIZE_NESW_CURSOR, GLFW_RESIZE_NWSE_CURSOR, GLFW_NOT_ALLOWED_CURSOR
#else
#define GLFW_HAS_NEW_CURSORS (0)
#endif
// Data
enum GlfwClientApi
{
GlfwClientApi_Unknown,
GlfwClientApi_OpenGL,
GlfwClientApi_Vulkan
};
static GLFWwindow* g_Window = NULL; // Main window
static GlfwClientApi g_ClientApi = GlfwClientApi_Unknown;
static double g_Time = 0.0;
static bool g_MouseJustPressed[ImGuiMouseButton_COUNT] = {};
static GLFWcursor* g_MouseCursors[ImGuiMouseCursor_COUNT] = {};
static bool g_InstalledCallbacks = false;
// Chain GLFW callbacks: our callbacks will call the user's previously installed callbacks, if any.
static GLFWmousebuttonfun g_PrevUserCallbackMousebutton = NULL;
static GLFWscrollfun g_PrevUserCallbackScroll = NULL;
static GLFWkeyfun g_PrevUserCallbackKey = NULL;
static GLFWcharfun g_PrevUserCallbackChar = NULL;
static const char* ImGui_ImplGlfw_GetClipboardText(void* user_data)
{
return glfwGetClipboardString((GLFWwindow*)user_data);
}
static void ImGui_ImplGlfw_SetClipboardText(void* user_data, const char* text)
{
glfwSetClipboardString((GLFWwindow*)user_data, text);
}
void ImGui_ImplGlfw_MouseButtonCallback(GLFWwindow* window, int button, int action, int mods)
{
if (g_PrevUserCallbackMousebutton != NULL)
g_PrevUserCallbackMousebutton(window, button, action, mods);
if (action == GLFW_PRESS && button >= 0 && button < IM_ARRAYSIZE(g_MouseJustPressed))
g_MouseJustPressed[button] = true;
}
void ImGui_ImplGlfw_ScrollCallback(GLFWwindow* window, double xoffset, double yoffset)
{
if (g_PrevUserCallbackScroll != NULL)
g_PrevUserCallbackScroll(window, xoffset, yoffset);
ImGuiIO& io = ImGui::GetIO();
io.MouseWheelH += (float)xoffset;
io.MouseWheel += (float)yoffset;
}
void ImGui_ImplGlfw_KeyCallback(GLFWwindow* window, int key, int scancode, int action, int mods)
{
if (g_PrevUserCallbackKey != NULL)
g_PrevUserCallbackKey(window, key, scancode, action, mods);
ImGuiIO& io = ImGui::GetIO();
if (action == GLFW_PRESS)
io.KeysDown[key] = true;
if (action == GLFW_RELEASE)
io.KeysDown[key] = false;
// Modifiers are not reliable across systems
io.KeyCtrl = io.KeysDown[GLFW_KEY_LEFT_CONTROL] || io.KeysDown[GLFW_KEY_RIGHT_CONTROL];
io.KeyShift = io.KeysDown[GLFW_KEY_LEFT_SHIFT] || io.KeysDown[GLFW_KEY_RIGHT_SHIFT];
io.KeyAlt = io.KeysDown[GLFW_KEY_LEFT_ALT] || io.KeysDown[GLFW_KEY_RIGHT_ALT];
#ifdef _WIN32
io.KeySuper = false;
#else
io.KeySuper = io.KeysDown[GLFW_KEY_LEFT_SUPER] || io.KeysDown[GLFW_KEY_RIGHT_SUPER];
#endif
}
void ImGui_ImplGlfw_CharCallback(GLFWwindow* window, unsigned int c)
{
if (g_PrevUserCallbackChar != NULL)
g_PrevUserCallbackChar(window, c);
ImGuiIO& io = ImGui::GetIO();
io.AddInputCharacter(c);
}
static bool ImGui_ImplGlfw_Init(GLFWwindow* window, bool install_callbacks, GlfwClientApi client_api)
{
g_Window = window;
g_Time = 0.0;
// Setup back-end capabilities flags
ImGuiIO& io = ImGui::GetIO();
io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors; // We can honor GetMouseCursor() values (optional)
io.BackendFlags |= ImGuiBackendFlags_HasSetMousePos; // We can honor io.WantSetMousePos requests (optional, rarely used)
io.BackendPlatformName = "imgui_impl_glfw";
// Keyboard mapping. ImGui will use those indices to peek into the io.KeysDown[] array.
io.KeyMap[ImGuiKey_Tab] = GLFW_KEY_TAB;
io.KeyMap[ImGuiKey_LeftArrow] = GLFW_KEY_LEFT;
io.KeyMap[ImGuiKey_RightArrow] = GLFW_KEY_RIGHT;
io.KeyMap[ImGuiKey_UpArrow] = GLFW_KEY_UP;
io.KeyMap[ImGuiKey_DownArrow] = GLFW_KEY_DOWN;
io.KeyMap[ImGuiKey_PageUp] = GLFW_KEY_PAGE_UP;
io.KeyMap[ImGuiKey_PageDown] = GLFW_KEY_PAGE_DOWN;
io.KeyMap[ImGuiKey_Home] = GLFW_KEY_HOME;
io.KeyMap[ImGuiKey_End] = GLFW_KEY_END;
io.KeyMap[ImGuiKey_Insert] = GLFW_KEY_INSERT;
io.KeyMap[ImGuiKey_Delete] = GLFW_KEY_DELETE;
io.KeyMap[ImGuiKey_Backspace] = GLFW_KEY_BACKSPACE;
io.KeyMap[ImGuiKey_Space] = GLFW_KEY_SPACE;
io.KeyMap[ImGuiKey_Enter] = GLFW_KEY_ENTER;
io.KeyMap[ImGuiKey_Escape] = GLFW_KEY_ESCAPE;
io.KeyMap[ImGuiKey_KeyPadEnter] = GLFW_KEY_KP_ENTER;
io.KeyMap[ImGuiKey_A] = GLFW_KEY_A;
io.KeyMap[ImGuiKey_C] = GLFW_KEY_C;
io.KeyMap[ImGuiKey_V] = GLFW_KEY_V;
io.KeyMap[ImGuiKey_X] = GLFW_KEY_X;
io.KeyMap[ImGuiKey_Y] = GLFW_KEY_Y;
io.KeyMap[ImGuiKey_Z] = GLFW_KEY_Z;
int f_index = GetEnumValueForF();
int d_index = GetEnumValueForD();
if (f_index >= 0)
io.KeyMap[f_index] = GLFW_KEY_F;
if (d_index >= 0)
io.KeyMap[d_index] = GLFW_KEY_D;
io.SetClipboardTextFn = ImGui_ImplGlfw_SetClipboardText;
io.GetClipboardTextFn = ImGui_ImplGlfw_GetClipboardText;
io.ClipboardUserData = g_Window;
#if defined(_WIN32)
//io.ImeWindowHandle = (void*)glfwGetWin32Window(g_Window);
#endif
// Create mouse cursors
// (By design, on X11 cursors are user configurable and some cursors may be missing. When a cursor doesn't exist,
// GLFW will emit an error which will often be printed by the app, so we temporarily disable error reporting.
// Missing cursors will return NULL and our _UpdateMouseCursor() function will use the Arrow cursor instead.)
GLFWerrorfun prev_error_callback = glfwSetErrorCallback(NULL);
g_MouseCursors[ImGuiMouseCursor_Arrow] = glfwCreateStandardCursor(GLFW_ARROW_CURSOR);
g_MouseCursors[ImGuiMouseCursor_TextInput] = glfwCreateStandardCursor(GLFW_IBEAM_CURSOR);
g_MouseCursors[ImGuiMouseCursor_ResizeNS] = glfwCreateStandardCursor(GLFW_VRESIZE_CURSOR);
g_MouseCursors[ImGuiMouseCursor_ResizeEW] = glfwCreateStandardCursor(GLFW_HRESIZE_CURSOR);
g_MouseCursors[ImGuiMouseCursor_Hand] = glfwCreateStandardCursor(GLFW_HAND_CURSOR);
#if GLFW_HAS_NEW_CURSORS
g_MouseCursors[ImGuiMouseCursor_ResizeAll] = glfwCreateStandardCursor(GLFW_RESIZE_ALL_CURSOR);
g_MouseCursors[ImGuiMouseCursor_ResizeNESW] = glfwCreateStandardCursor(GLFW_RESIZE_NESW_CURSOR);
g_MouseCursors[ImGuiMouseCursor_ResizeNWSE] = glfwCreateStandardCursor(GLFW_RESIZE_NWSE_CURSOR);
g_MouseCursors[ImGuiMouseCursor_NotAllowed] = glfwCreateStandardCursor(GLFW_NOT_ALLOWED_CURSOR);
#else
g_MouseCursors[ImGuiMouseCursor_ResizeAll] = glfwCreateStandardCursor(GLFW_ARROW_CURSOR);
g_MouseCursors[ImGuiMouseCursor_ResizeNESW] = glfwCreateStandardCursor(GLFW_ARROW_CURSOR);
g_MouseCursors[ImGuiMouseCursor_ResizeNWSE] = glfwCreateStandardCursor(GLFW_ARROW_CURSOR);
g_MouseCursors[ImGuiMouseCursor_NotAllowed] = glfwCreateStandardCursor(GLFW_ARROW_CURSOR);
#endif
glfwSetErrorCallback(prev_error_callback);
// Chain GLFW callbacks: our callbacks will call the user's previously installed callbacks, if any.
g_PrevUserCallbackMousebutton = NULL;
g_PrevUserCallbackScroll = NULL;
g_PrevUserCallbackKey = NULL;
g_PrevUserCallbackChar = NULL;
if (install_callbacks)
{
g_InstalledCallbacks = true;
g_PrevUserCallbackMousebutton = glfwSetMouseButtonCallback(window, ImGui_ImplGlfw_MouseButtonCallback);
g_PrevUserCallbackScroll = glfwSetScrollCallback(window, ImGui_ImplGlfw_ScrollCallback);
g_PrevUserCallbackKey = glfwSetKeyCallback(window, ImGui_ImplGlfw_KeyCallback);
g_PrevUserCallbackChar = glfwSetCharCallback(window, ImGui_ImplGlfw_CharCallback);
}
g_ClientApi = client_api;
return true;
}
bool ImGui_ImplGlfw_InitForNone(GLFWwindow* window, bool install_callbacks)
{
return ImGui_ImplGlfw_Init(window, install_callbacks, GlfwClientApi_Unknown);
}
bool ImGui_ImplGlfw_InitForOpenGL(GLFWwindow* window, bool install_callbacks)
{
return ImGui_ImplGlfw_Init(window, install_callbacks, GlfwClientApi_OpenGL);
}
bool ImGui_ImplGlfw_InitForVulkan(GLFWwindow* window, bool install_callbacks)
{
return ImGui_ImplGlfw_Init(window, install_callbacks, GlfwClientApi_Vulkan);
}
void ImGui_ImplGlfw_Shutdown()
{
if (g_InstalledCallbacks)
{
glfwSetMouseButtonCallback(g_Window, g_PrevUserCallbackMousebutton);
glfwSetScrollCallback(g_Window, g_PrevUserCallbackScroll);
glfwSetKeyCallback(g_Window, g_PrevUserCallbackKey);
glfwSetCharCallback(g_Window, g_PrevUserCallbackChar);
g_InstalledCallbacks = false;
}
for (ImGuiMouseCursor cursor_n = 0; cursor_n < ImGuiMouseCursor_COUNT; cursor_n++)
{
glfwDestroyCursor(g_MouseCursors[cursor_n]);
g_MouseCursors[cursor_n] = NULL;
}
g_ClientApi = GlfwClientApi_Unknown;
}
static void ImGui_ImplGlfw_UpdateMousePosAndButtons()
{
// Update buttons
ImGuiIO& io = ImGui::GetIO();
for (int i = 0; i < IM_ARRAYSIZE(io.MouseDown); i++)
{
// If a mouse press event came, always pass it as "mouse held this frame", so we don't miss click-release events that are shorter than 1 frame.
io.MouseDown[i] = g_MouseJustPressed[i] || glfwGetMouseButton(g_Window, i) != 0;
g_MouseJustPressed[i] = false;
}
// Update mouse position
const ImVec2 mouse_pos_backup = io.MousePos;
io.MousePos = ImVec2(-FLT_MAX, -FLT_MAX);
#ifdef __EMSCRIPTEN__
const bool focused = true; // Emscripten
#else
const bool focused = glfwGetWindowAttrib(g_Window, GLFW_FOCUSED) != 0;
#endif
if (focused)
{
if (io.WantSetMousePos)
{
glfwSetCursorPos(g_Window, (double)mouse_pos_backup.x, (double)mouse_pos_backup.y);
}
else
{
double mouse_x, mouse_y;
glfwGetCursorPos(g_Window, &mouse_x, &mouse_y);
io.MousePos = ImVec2((float)mouse_x, (float)mouse_y);
}
}
}
static void ImGui_ImplGlfw_UpdateMouseCursor()
{
ImGuiIO& io = ImGui::GetIO();
if ((io.ConfigFlags & ImGuiConfigFlags_NoMouseCursorChange) || glfwGetInputMode(g_Window, GLFW_CURSOR) == GLFW_CURSOR_DISABLED)
return;
ImGuiMouseCursor imgui_cursor = ImGui::GetMouseCursor();
if (imgui_cursor == ImGuiMouseCursor_None || io.MouseDrawCursor)
{
// Hide OS mouse cursor if imgui is drawing it or if it wants no cursor
glfwSetInputMode(g_Window, GLFW_CURSOR, GLFW_CURSOR_HIDDEN);
}
else
{
// Show OS mouse cursor
// FIXME-PLATFORM: Unfocused windows seems to fail changing the mouse cursor with GLFW 3.2, but 3.3 works here.
glfwSetCursor(g_Window, g_MouseCursors[imgui_cursor] ? g_MouseCursors[imgui_cursor] : g_MouseCursors[ImGuiMouseCursor_Arrow]);
glfwSetInputMode(g_Window, GLFW_CURSOR, GLFW_CURSOR_NORMAL);
}
}
static void ImGui_ImplGlfw_UpdateGamepads()
{
ImGuiIO& io = ImGui::GetIO();
memset(io.NavInputs, 0, sizeof(io.NavInputs));
if ((io.ConfigFlags & ImGuiConfigFlags_NavEnableGamepad) == 0)
return;
// Update gamepad inputs
#define MAP_BUTTON(NAV_NO, BUTTON_NO) { if (buttons_count > BUTTON_NO && buttons[BUTTON_NO] == GLFW_PRESS) io.NavInputs[NAV_NO] = 1.0f; }
#define MAP_ANALOG(NAV_NO, AXIS_NO, V0, V1) { float v = (axes_count > AXIS_NO) ? axes[AXIS_NO] : V0; v = (v - V0) / (V1 - V0); if (v > 1.0f) v = 1.0f; if (io.NavInputs[NAV_NO] < v) io.NavInputs[NAV_NO] = v; }
int axes_count = 0, buttons_count = 0;
const float* axes = glfwGetJoystickAxes(GLFW_JOYSTICK_1, &axes_count);
const unsigned char* buttons = glfwGetJoystickButtons(GLFW_JOYSTICK_1, &buttons_count);
MAP_BUTTON(ImGuiNavInput_Activate, 0); // Cross / A
MAP_BUTTON(ImGuiNavInput_Cancel, 1); // Circle / B
MAP_BUTTON(ImGuiNavInput_Menu, 2); // Square / X
MAP_BUTTON(ImGuiNavInput_Input, 3); // Triangle / Y
MAP_BUTTON(ImGuiNavInput_DpadLeft, 13); // D-Pad Left
MAP_BUTTON(ImGuiNavInput_DpadRight, 11); // D-Pad Right
MAP_BUTTON(ImGuiNavInput_DpadUp, 10); // D-Pad Up
MAP_BUTTON(ImGuiNavInput_DpadDown, 12); // D-Pad Down
MAP_BUTTON(ImGuiNavInput_FocusPrev, 4); // L1 / LB
MAP_BUTTON(ImGuiNavInput_FocusNext, 5); // R1 / RB
MAP_BUTTON(ImGuiNavInput_TweakSlow, 4); // L1 / LB
MAP_BUTTON(ImGuiNavInput_TweakFast, 5); // R1 / RB
MAP_ANALOG(ImGuiNavInput_LStickLeft, 0, -0.3f, -0.9f);
MAP_ANALOG(ImGuiNavInput_LStickRight,0, +0.3f, +0.9f);
MAP_ANALOG(ImGuiNavInput_LStickUp, 1, +0.3f, +0.9f);
MAP_ANALOG(ImGuiNavInput_LStickDown, 1, -0.3f, -0.9f);
#undef MAP_BUTTON
#undef MAP_ANALOG
if (axes_count > 0 && buttons_count > 0)
io.BackendFlags |= ImGuiBackendFlags_HasGamepad;
else
io.BackendFlags &= ~ImGuiBackendFlags_HasGamepad;
}
void ImGui_ImplGlfw_NewFrame()
{
ImGuiIO& io = ImGui::GetIO();
IM_ASSERT(io.Fonts->IsBuilt() && "Font atlas not built! It is generally built by the renderer back-end. Missing call to renderer _NewFrame() function? e.g. ImGui_ImplOpenGL3_NewFrame().");
// Setup display size (every frame to accommodate for window resizing)
int w, h;
int display_w, display_h;
glfwGetWindowSize(g_Window, &w, &h);
glfwGetFramebufferSize(g_Window, &display_w, &display_h);
io.DisplaySize = ImVec2((float)w, (float)h);
if (w > 0 && h > 0)
io.DisplayFramebufferScale = ImVec2((float)display_w / w, (float)display_h / h);
// Setup time step
double current_time = glfwGetTime();
io.DeltaTime = g_Time > 0.0 ? (float)(current_time - g_Time) : (float)(1.0f / 60.0f);
g_Time = current_time;
ImGui_ImplGlfw_UpdateMousePosAndButtons();
ImGui_ImplGlfw_UpdateMouseCursor();
// Update game controllers (if enabled and available)
ImGui_ImplGlfw_UpdateGamepads();
}

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// dear imgui: Platform Binding for GLFW
// This needs to be used along with a Renderer (e.g. OpenGL3, Vulkan..)
// (Info: GLFW is a cross-platform general purpose library for handling windows, inputs, OpenGL/Vulkan graphics context creation, etc.)
// Implemented features:
// [X] Platform: Clipboard support.
// [X] Platform: Gamepad support. Enable with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
// [x] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'. FIXME: 3 cursors types are missing from GLFW.
// [X] Platform: Keyboard arrays indexed using GLFW_KEY_* codes, e.g. ImGui::IsKeyPressed(GLFW_KEY_SPACE).
// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp.
// https://github.com/ocornut/imgui
// About GLSL version:
// The 'glsl_version' initialization parameter defaults to "#version 150" if NULL.
// Only override if your GL version doesn't handle this GLSL version. Keep NULL if unsure!
#pragma once
#include "imgui.h" // IMGUI_IMPL_API
struct GLFWwindow;
IMGUI_IMPL_API bool ImGui_ImplGlfw_InitForNone(GLFWwindow* window, bool install_callbacks);
IMGUI_IMPL_API bool ImGui_ImplGlfw_InitForOpenGL(GLFWwindow* window, bool install_callbacks);
IMGUI_IMPL_API bool ImGui_ImplGlfw_InitForVulkan(GLFWwindow* window, bool install_callbacks);
IMGUI_IMPL_API void ImGui_ImplGlfw_Shutdown();
IMGUI_IMPL_API void ImGui_ImplGlfw_NewFrame();
// GLFW callbacks
// - When calling Init with 'install_callbacks=true': GLFW callbacks will be installed for you. They will call user's previously installed callbacks, if any.
// - When calling Init with 'install_callbacks=false': GLFW callbacks won't be installed. You will need to call those function yourself from your own GLFW callbacks.
IMGUI_IMPL_API void ImGui_ImplGlfw_MouseButtonCallback(GLFWwindow* window, int button, int action, int mods);
IMGUI_IMPL_API void ImGui_ImplGlfw_ScrollCallback(GLFWwindow* window, double xoffset, double yoffset);
IMGUI_IMPL_API void ImGui_ImplGlfw_KeyCallback(GLFWwindow* window, int key, int scancode, int action, int mods);
IMGUI_IMPL_API void ImGui_ImplGlfw_CharCallback(GLFWwindow* window, unsigned int c);

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// dear imgui: Renderer for modern OpenGL with shaders / programmatic pipeline
// - Desktop GL: 2.x 3.x 4.x
// - Embedded GL: ES 2.0 (WebGL 1.0), ES 3.0 (WebGL 2.0)
// This needs to be used along with a Platform Binding (e.g. GLFW, SDL, Win32, custom..)
// Implemented features:
// [X] Renderer: User texture binding. Use 'GLuint' OpenGL texture identifier as void*/ImTextureID. Read the FAQ about ImTextureID!
// [x] Renderer: Desktop GL only: Support for large meshes (64k+ vertices) with 16-bit indices.
// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp.
// https://github.com/ocornut/imgui
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2020-07-10: OpenGL: Added support for glad2 OpenGL loader.
// 2020-05-08: OpenGL: Made default GLSL version 150 (instead of 130) on OSX.
// 2020-04-21: OpenGL: Fixed handling of glClipControl(GL_UPPER_LEFT) by inverting projection matrix.
// 2020-04-12: OpenGL: Fixed context version check mistakenly testing for 4.0+ instead of 3.2+ to enable ImGuiBackendFlags_RendererHasVtxOffset.
// 2020-03-24: OpenGL: Added support for glbinding 2.x OpenGL loader.
// 2020-01-07: OpenGL: Added support for glbinding 3.x OpenGL loader.
// 2019-10-25: OpenGL: Using a combination of GL define and runtime GL version to decide whether to use glDrawElementsBaseVertex(). Fix building with pre-3.2 GL loaders.
// 2019-09-22: OpenGL: Detect default GL loader using __has_include compiler facility.
// 2019-09-16: OpenGL: Tweak initialization code to allow application calling ImGui_ImplOpenGL3_CreateFontsTexture() before the first NewFrame() call.
// 2019-05-29: OpenGL: Desktop GL only: Added support for large mesh (64K+ vertices), enable ImGuiBackendFlags_RendererHasVtxOffset flag.
// 2019-04-30: OpenGL: Added support for special ImDrawCallback_ResetRenderState callback to reset render state.
// 2019-03-29: OpenGL: Not calling glBindBuffer more than necessary in the render loop.
// 2019-03-15: OpenGL: Added a GL call + comments in ImGui_ImplOpenGL3_Init() to detect uninitialized GL function loaders early.
// 2019-03-03: OpenGL: Fix support for ES 2.0 (WebGL 1.0).
// 2019-02-20: OpenGL: Fix for OSX not supporting OpenGL 4.5, we don't try to read GL_CLIP_ORIGIN even if defined by the headers/loader.
// 2019-02-11: OpenGL: Projecting clipping rectangles correctly using draw_data->FramebufferScale to allow multi-viewports for retina display.
// 2019-02-01: OpenGL: Using GLSL 410 shaders for any version over 410 (e.g. 430, 450).
// 2018-11-30: Misc: Setting up io.BackendRendererName so it can be displayed in the About Window.
// 2018-11-13: OpenGL: Support for GL 4.5's glClipControl(GL_UPPER_LEFT) / GL_CLIP_ORIGIN.
// 2018-08-29: OpenGL: Added support for more OpenGL loaders: glew and glad, with comments indicative that any loader can be used.
// 2018-08-09: OpenGL: Default to OpenGL ES 3 on iOS and Android. GLSL version default to "#version 300 ES".
// 2018-07-30: OpenGL: Support for GLSL 300 ES and 410 core. Fixes for Emscripten compilation.
// 2018-07-10: OpenGL: Support for more GLSL versions (based on the GLSL version string). Added error output when shaders fail to compile/link.
// 2018-06-08: Misc: Extracted imgui_impl_opengl3.cpp/.h away from the old combined GLFW/SDL+OpenGL3 examples.
// 2018-06-08: OpenGL: Use draw_data->DisplayPos and draw_data->DisplaySize to setup projection matrix and clipping rectangle.
// 2018-05-25: OpenGL: Removed unnecessary backup/restore of GL_ELEMENT_ARRAY_BUFFER_BINDING since this is part of the VAO state.
// 2018-05-14: OpenGL: Making the call to glBindSampler() optional so 3.2 context won't fail if the function is a NULL pointer.
// 2018-03-06: OpenGL: Added const char* glsl_version parameter to ImGui_ImplOpenGL3_Init() so user can override the GLSL version e.g. "#version 150".
// 2018-02-23: OpenGL: Create the VAO in the render function so the setup can more easily be used with multiple shared GL context.
// 2018-02-16: Misc: Obsoleted the io.RenderDrawListsFn callback and exposed ImGui_ImplSdlGL3_RenderDrawData() in the .h file so you can call it yourself.
// 2018-01-07: OpenGL: Changed GLSL shader version from 330 to 150.
// 2017-09-01: OpenGL: Save and restore current bound sampler. Save and restore current polygon mode.
// 2017-05-01: OpenGL: Fixed save and restore of current blend func state.
// 2017-05-01: OpenGL: Fixed save and restore of current GL_ACTIVE_TEXTURE.
// 2016-09-05: OpenGL: Fixed save and restore of current scissor rectangle.
// 2016-07-29: OpenGL: Explicitly setting GL_UNPACK_ROW_LENGTH to reduce issues because SDL changes it. (#752)
//----------------------------------------
// OpenGL GLSL GLSL
// version version string
//----------------------------------------
// 2.0 110 "#version 110"
// 2.1 120 "#version 120"
// 3.0 130 "#version 130"
// 3.1 140 "#version 140"
// 3.2 150 "#version 150"
// 3.3 330 "#version 330 core"
// 4.0 400 "#version 400 core"
// 4.1 410 "#version 410 core"
// 4.2 420 "#version 410 core"
// 4.3 430 "#version 430 core"
// ES 2.0 100 "#version 100" = WebGL 1.0
// ES 3.0 300 "#version 300 es" = WebGL 2.0
//----------------------------------------
#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)
#define _CRT_SECURE_NO_WARNINGS
#endif
#include "imgui.h"
#include "imgui_impl_opengl3.h"
#include <stdio.h>
#if defined(_MSC_VER) && _MSC_VER <= 1500 // MSVC 2008 or earlier
#include <stddef.h> // intptr_t
#else
#include <stdint.h> // intptr_t
#endif
// GL includes
#if defined(IMGUI_IMPL_OPENGL_ES2)
#include <GLES2/gl2.h>
#elif defined(IMGUI_IMPL_OPENGL_ES3)
#if (defined(__APPLE__) && (TARGET_OS_IOS || TARGET_OS_TV))
#include <OpenGLES/ES3/gl.h> // Use GL ES 3
#else
#include <GLES3/gl3.h> // Use GL ES 3
#endif
#else
// About Desktop OpenGL function loaders:
// Modern desktop OpenGL doesn't have a standard portable header file to load OpenGL function pointers.
// Helper libraries are often used for this purpose! Here we are supporting a few common ones (gl3w, glew, glad).
// You may use another loader/header of your choice (glext, glLoadGen, etc.), or chose to manually implement your own.
#if defined(IMGUI_IMPL_OPENGL_LOADER_GL3W)
#include <GL/gl3w.h> // Needs to be initialized with gl3wInit() in user's code
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLEW)
#include <GL/glew.h> // Needs to be initialized with glewInit() in user's code.
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD)
#include <glad/glad.h> // Needs to be initialized with gladLoadGL() in user's code.
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD2)
#include <glad/gl.h> // Needs to be initialized with gladLoadGL(...) or gladLoaderLoadGL() in user's code.
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2)
#ifndef GLFW_INCLUDE_NONE
#define GLFW_INCLUDE_NONE // GLFW including OpenGL headers causes ambiguity or multiple definition errors.
#endif
#include <glbinding/Binding.h> // Needs to be initialized with glbinding::Binding::initialize() in user's code.
#include <glbinding/gl/gl.h>
using namespace gl;
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING3)
#ifndef GLFW_INCLUDE_NONE
#define GLFW_INCLUDE_NONE // GLFW including OpenGL headers causes ambiguity or multiple definition errors.
#endif
#include <glbinding/glbinding.h>// Needs to be initialized with glbinding::initialize() in user's code.
#include <glbinding/gl/gl.h>
using namespace gl;
#else
#include IMGUI_IMPL_OPENGL_LOADER_CUSTOM
#endif
#endif
// Desktop GL 3.2+ has glDrawElementsBaseVertex() which GL ES and WebGL don't have.
#if defined(IMGUI_IMPL_OPENGL_ES2) || defined(IMGUI_IMPL_OPENGL_ES3) || !defined(GL_VERSION_3_2)
#define IMGUI_IMPL_OPENGL_MAY_HAVE_VTX_OFFSET 0
#else
#define IMGUI_IMPL_OPENGL_MAY_HAVE_VTX_OFFSET 1
#endif
// OpenGL Data
static GLuint g_GlVersion = 0; // Extracted at runtime using GL_MAJOR_VERSION, GL_MINOR_VERSION queries (e.g. 320 for GL 3.2)
static char g_GlslVersionString[32] = ""; // Specified by user or detected based on compile time GL settings.
static GLuint g_FontTexture = 0;
static GLuint g_ShaderHandle = 0, g_VertHandle = 0, g_FragHandle = 0;
static GLint g_AttribLocationTex = 0, g_AttribLocationProjMtx = 0; // Uniforms location
static GLuint g_AttribLocationVtxPos = 0, g_AttribLocationVtxUV = 0, g_AttribLocationVtxColor = 0; // Vertex attributes location
static unsigned int g_VboHandle = 0, g_ElementsHandle = 0;
// Functions
bool ImGui_ImplOpenGL3_Init(const char* glsl_version)
{
// Query for GL version (e.g. 320 for GL 3.2)
#if !defined(IMGUI_IMPL_OPENGL_ES2)
GLint major, minor;
glGetIntegerv(GL_MAJOR_VERSION, &major);
glGetIntegerv(GL_MINOR_VERSION, &minor);
g_GlVersion = (GLuint)(major * 100 + minor * 10);
#else
g_GlVersion = 200; // GLES 2
#endif
// Setup back-end capabilities flags
ImGuiIO& io = ImGui::GetIO();
io.BackendRendererName = "imgui_impl_opengl3";
#if IMGUI_IMPL_OPENGL_MAY_HAVE_VTX_OFFSET
if (g_GlVersion >= 320)
io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset; // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
#endif
// Store GLSL version string so we can refer to it later in case we recreate shaders.
// Note: GLSL version is NOT the same as GL version. Leave this to NULL if unsure.
#if defined(IMGUI_IMPL_OPENGL_ES2)
if (glsl_version == NULL)
glsl_version = "#version 100";
#elif defined(IMGUI_IMPL_OPENGL_ES3)
if (glsl_version == NULL)
glsl_version = "#version 300 es";
#elif defined(__APPLE__)
if (glsl_version == NULL)
glsl_version = "#version 150";
#else
if (glsl_version == NULL)
glsl_version = "#version 130";
#endif
IM_ASSERT((int)strlen(glsl_version) + 2 < IM_ARRAYSIZE(g_GlslVersionString));
strcpy(g_GlslVersionString, glsl_version);
strcat(g_GlslVersionString, "\n");
// Debugging construct to make it easily visible in the IDE and debugger which GL loader has been selected.
// The code actually never uses the 'gl_loader' variable! It is only here so you can read it!
// If auto-detection fails or doesn't select the same GL loader file as used by your application,
// you are likely to get a crash below.
// You can explicitly select a loader by using '#define IMGUI_IMPL_OPENGL_LOADER_XXX' in imconfig.h or compiler command-line.
const char* gl_loader = "Unknown";
IM_UNUSED(gl_loader);
#if defined(IMGUI_IMPL_OPENGL_LOADER_GL3W)
gl_loader = "GL3W";
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLEW)
gl_loader = "GLEW";
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD)
gl_loader = "GLAD";
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD2)
gl_loader = "GLAD2";
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2)
gl_loader = "glbinding2";
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING3)
gl_loader = "glbinding3";
#elif defined(IMGUI_IMPL_OPENGL_LOADER_CUSTOM)
gl_loader = "custom";
#else
gl_loader = "none";
#endif
// Make an arbitrary GL call (we don't actually need the result)
// IF YOU GET A CRASH HERE: it probably means that you haven't initialized the OpenGL function loader used by this code.
// Desktop OpenGL 3/4 need a function loader. See the IMGUI_IMPL_OPENGL_LOADER_xxx explanation above.
GLint current_texture;
glGetIntegerv(GL_TEXTURE_BINDING_2D, &current_texture);
return true;
}
void ImGui_ImplOpenGL3_Shutdown()
{
ImGui_ImplOpenGL3_DestroyDeviceObjects();
}
void ImGui_ImplOpenGL3_NewFrame()
{
if (!g_ShaderHandle)
ImGui_ImplOpenGL3_CreateDeviceObjects();
}
static void ImGui_ImplOpenGL3_SetupRenderState(ImDrawData* draw_data, int fb_width, int fb_height, GLuint vertex_array_object)
{
// Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled, polygon fill
glEnable(GL_BLEND);
glBlendEquation(GL_FUNC_ADD);
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
glDisable(GL_CULL_FACE);
glDisable(GL_DEPTH_TEST);
glEnable(GL_SCISSOR_TEST);
#ifdef GL_POLYGON_MODE
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
#endif
// Support for GL 4.5 rarely used glClipControl(GL_UPPER_LEFT)
bool clip_origin_lower_left = true;
#if defined(GL_CLIP_ORIGIN) && !defined(__APPLE__)
GLenum current_clip_origin = 0; glGetIntegerv(GL_CLIP_ORIGIN, (GLint*)&current_clip_origin);
if (current_clip_origin == GL_UPPER_LEFT)
clip_origin_lower_left = false;
#endif
// Setup viewport, orthographic projection matrix
// Our visible imgui space lies from draw_data->DisplayPos (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right). DisplayPos is (0,0) for single viewport apps.
glViewport(0, 0, (GLsizei)fb_width, (GLsizei)fb_height);
float L = draw_data->DisplayPos.x;
float R = draw_data->DisplayPos.x + draw_data->DisplaySize.x;
float T = draw_data->DisplayPos.y;
float B = draw_data->DisplayPos.y + draw_data->DisplaySize.y;
if (!clip_origin_lower_left) { float tmp = T; T = B; B = tmp; } // Swap top and bottom if origin is upper left
const float ortho_projection[4][4] =
{
{ 2.0f/(R-L), 0.0f, 0.0f, 0.0f },
{ 0.0f, 2.0f/(T-B), 0.0f, 0.0f },
{ 0.0f, 0.0f, -1.0f, 0.0f },
{ (R+L)/(L-R), (T+B)/(B-T), 0.0f, 1.0f },
};
glUseProgram(g_ShaderHandle);
glUniform1i(g_AttribLocationTex, 0);
glUniformMatrix4fv(g_AttribLocationProjMtx, 1, GL_FALSE, &ortho_projection[0][0]);
#ifdef GL_SAMPLER_BINDING
glBindSampler(0, 0); // We use combined texture/sampler state. Applications using GL 3.3 may set that otherwise.
#endif
(void)vertex_array_object;
#ifndef IMGUI_IMPL_OPENGL_ES2
glBindVertexArray(vertex_array_object);
#endif
// Bind vertex/index buffers and setup attributes for ImDrawVert
glBindBuffer(GL_ARRAY_BUFFER, g_VboHandle);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_ElementsHandle);
glEnableVertexAttribArray(g_AttribLocationVtxPos);
glEnableVertexAttribArray(g_AttribLocationVtxUV);
glEnableVertexAttribArray(g_AttribLocationVtxColor);
glVertexAttribPointer(g_AttribLocationVtxPos, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, pos));
glVertexAttribPointer(g_AttribLocationVtxUV, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, uv));
glVertexAttribPointer(g_AttribLocationVtxColor, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, col));
}
// OpenGL3 Render function.
// (this used to be set in io.RenderDrawListsFn and called by ImGui::Render(), but you can now call this directly from your main loop)
// Note that this implementation is little overcomplicated because we are saving/setting up/restoring every OpenGL state explicitly, in order to be able to run within any OpenGL engine that doesn't do so.
void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
{
// Avoid rendering when minimized, scale coordinates for retina displays (screen coordinates != framebuffer coordinates)
int fb_width = (int)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x);
int fb_height = (int)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y);
if (fb_width <= 0 || fb_height <= 0)
return;
// Backup GL state
GLenum last_active_texture; glGetIntegerv(GL_ACTIVE_TEXTURE, (GLint*)&last_active_texture);
glActiveTexture(GL_TEXTURE0);
GLuint last_program; glGetIntegerv(GL_CURRENT_PROGRAM, (GLint*)&last_program);
GLuint last_texture; glGetIntegerv(GL_TEXTURE_BINDING_2D, (GLint*)&last_texture);
#ifdef GL_SAMPLER_BINDING
GLuint last_sampler; glGetIntegerv(GL_SAMPLER_BINDING, (GLint*)&last_sampler);
#endif
GLuint last_array_buffer; glGetIntegerv(GL_ARRAY_BUFFER_BINDING, (GLint*)&last_array_buffer);
#ifndef IMGUI_IMPL_OPENGL_ES2
GLuint last_vertex_array_object; glGetIntegerv(GL_VERTEX_ARRAY_BINDING, (GLint*)&last_vertex_array_object);
#endif
#ifdef GL_POLYGON_MODE
GLint last_polygon_mode[2]; glGetIntegerv(GL_POLYGON_MODE, last_polygon_mode);
#endif
GLint last_viewport[4]; glGetIntegerv(GL_VIEWPORT, last_viewport);
GLint last_scissor_box[4]; glGetIntegerv(GL_SCISSOR_BOX, last_scissor_box);
GLenum last_blend_src_rgb; glGetIntegerv(GL_BLEND_SRC_RGB, (GLint*)&last_blend_src_rgb);
GLenum last_blend_dst_rgb; glGetIntegerv(GL_BLEND_DST_RGB, (GLint*)&last_blend_dst_rgb);
GLenum last_blend_src_alpha; glGetIntegerv(GL_BLEND_SRC_ALPHA, (GLint*)&last_blend_src_alpha);
GLenum last_blend_dst_alpha; glGetIntegerv(GL_BLEND_DST_ALPHA, (GLint*)&last_blend_dst_alpha);
GLenum last_blend_equation_rgb; glGetIntegerv(GL_BLEND_EQUATION_RGB, (GLint*)&last_blend_equation_rgb);
GLenum last_blend_equation_alpha; glGetIntegerv(GL_BLEND_EQUATION_ALPHA, (GLint*)&last_blend_equation_alpha);
GLboolean last_enable_blend = glIsEnabled(GL_BLEND);
GLboolean last_enable_cull_face = glIsEnabled(GL_CULL_FACE);
GLboolean last_enable_depth_test = glIsEnabled(GL_DEPTH_TEST);
GLboolean last_enable_scissor_test = glIsEnabled(GL_SCISSOR_TEST);
// Setup desired GL state
// Recreate the VAO every time (this is to easily allow multiple GL contexts to be rendered to. VAO are not shared among GL contexts)
// The renderer would actually work without any VAO bound, but then our VertexAttrib calls would overwrite the default one currently bound.
GLuint vertex_array_object = 0;
#ifndef IMGUI_IMPL_OPENGL_ES2
glGenVertexArrays(1, &vertex_array_object);
#endif
ImGui_ImplOpenGL3_SetupRenderState(draw_data, fb_width, fb_height, vertex_array_object);
// Will project scissor/clipping rectangles into framebuffer space
ImVec2 clip_off = draw_data->DisplayPos; // (0,0) unless using multi-viewports
ImVec2 clip_scale = draw_data->FramebufferScale; // (1,1) unless using retina display which are often (2,2)
// Render command lists
for (int n = 0; n < draw_data->CmdListsCount; n++)
{
const ImDrawList* cmd_list = draw_data->CmdLists[n];
// Upload vertex/index buffers
glBufferData(GL_ARRAY_BUFFER, (GLsizeiptr)cmd_list->VtxBuffer.Size * (int)sizeof(ImDrawVert), (const GLvoid*)cmd_list->VtxBuffer.Data, GL_STREAM_DRAW);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, (GLsizeiptr)cmd_list->IdxBuffer.Size * (int)sizeof(ImDrawIdx), (const GLvoid*)cmd_list->IdxBuffer.Data, GL_STREAM_DRAW);
for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
{
const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
if (pcmd->UserCallback != NULL)
{
// User callback, registered via ImDrawList::AddCallback()
// (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
ImGui_ImplOpenGL3_SetupRenderState(draw_data, fb_width, fb_height, vertex_array_object);
else
pcmd->UserCallback(cmd_list, pcmd);
}
else
{
// Project scissor/clipping rectangles into framebuffer space
ImVec4 clip_rect;
clip_rect.x = (pcmd->ClipRect.x - clip_off.x) * clip_scale.x;
clip_rect.y = (pcmd->ClipRect.y - clip_off.y) * clip_scale.y;
clip_rect.z = (pcmd->ClipRect.z - clip_off.x) * clip_scale.x;
clip_rect.w = (pcmd->ClipRect.w - clip_off.y) * clip_scale.y;
if (clip_rect.x < fb_width && clip_rect.y < fb_height && clip_rect.z >= 0.0f && clip_rect.w >= 0.0f)
{
// Apply scissor/clipping rectangle
glScissor((int)clip_rect.x, (int)(fb_height - clip_rect.w), (int)(clip_rect.z - clip_rect.x), (int)(clip_rect.w - clip_rect.y));
// Bind texture, Draw
glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->TextureId);
#if IMGUI_IMPL_OPENGL_MAY_HAVE_VTX_OFFSET
if (g_GlVersion >= 320)
glDrawElementsBaseVertex(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, (void*)(intptr_t)(pcmd->IdxOffset * sizeof(ImDrawIdx)), (GLint)pcmd->VtxOffset);
else
#endif
glDrawElements(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, (void*)(intptr_t)(pcmd->IdxOffset * sizeof(ImDrawIdx)));
}
}
}
}
// Destroy the temporary VAO
#ifndef IMGUI_IMPL_OPENGL_ES2
glDeleteVertexArrays(1, &vertex_array_object);
#endif
// Restore modified GL state
glUseProgram(last_program);
glBindTexture(GL_TEXTURE_2D, last_texture);
#ifdef GL_SAMPLER_BINDING
glBindSampler(0, last_sampler);
#endif
glActiveTexture(last_active_texture);
#ifndef IMGUI_IMPL_OPENGL_ES2
glBindVertexArray(last_vertex_array_object);
#endif
glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer);
glBlendEquationSeparate(last_blend_equation_rgb, last_blend_equation_alpha);
glBlendFuncSeparate(last_blend_src_rgb, last_blend_dst_rgb, last_blend_src_alpha, last_blend_dst_alpha);
if (last_enable_blend) glEnable(GL_BLEND); else glDisable(GL_BLEND);
if (last_enable_cull_face) glEnable(GL_CULL_FACE); else glDisable(GL_CULL_FACE);
if (last_enable_depth_test) glEnable(GL_DEPTH_TEST); else glDisable(GL_DEPTH_TEST);
if (last_enable_scissor_test) glEnable(GL_SCISSOR_TEST); else glDisable(GL_SCISSOR_TEST);
#ifdef GL_POLYGON_MODE
glPolygonMode(GL_FRONT_AND_BACK, (GLenum)last_polygon_mode[0]);
#endif
glViewport(last_viewport[0], last_viewport[1], (GLsizei)last_viewport[2], (GLsizei)last_viewport[3]);
glScissor(last_scissor_box[0], last_scissor_box[1], (GLsizei)last_scissor_box[2], (GLsizei)last_scissor_box[3]);
}
bool ImGui_ImplOpenGL3_CreateFontsTexture()
{
// Build texture atlas
ImGuiIO& io = ImGui::GetIO();
unsigned char* pixels;
int width, height;
io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height); // Load as RGBA 32-bit (75% of the memory is wasted, but default font is so small) because it is more likely to be compatible with user's existing shaders. If your ImTextureId represent a higher-level concept than just a GL texture id, consider calling GetTexDataAsAlpha8() instead to save on GPU memory.
// Upload texture to graphics system
GLint last_texture;
glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
glGenTextures(1, &g_FontTexture);
glBindTexture(GL_TEXTURE_2D, g_FontTexture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
#ifdef GL_UNPACK_ROW_LENGTH
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
#endif
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
// Store our identifier
io.Fonts->TexID = (ImTextureID)(intptr_t)g_FontTexture;
// Restore state
glBindTexture(GL_TEXTURE_2D, last_texture);
return true;
}
void ImGui_ImplOpenGL3_DestroyFontsTexture()
{
if (g_FontTexture)
{
ImGuiIO& io = ImGui::GetIO();
glDeleteTextures(1, &g_FontTexture);
io.Fonts->TexID = 0;
g_FontTexture = 0;
}
}
// If you get an error please report on github. You may try different GL context version or GLSL version. See GL<>GLSL version table at the top of this file.
static bool CheckShader(GLuint handle, const char* desc)
{
GLint status = 0, log_length = 0;
glGetShaderiv(handle, GL_COMPILE_STATUS, &status);
glGetShaderiv(handle, GL_INFO_LOG_LENGTH, &log_length);
if ((GLboolean)status == GL_FALSE)
fprintf(stderr, "ERROR: ImGui_ImplOpenGL3_CreateDeviceObjects: failed to compile %s!\n", desc);
if (log_length > 1)
{
ImVector<char> buf;
buf.resize((int)(log_length + 1));
glGetShaderInfoLog(handle, log_length, NULL, (GLchar*)buf.begin());
fprintf(stderr, "%s\n", buf.begin());
}
return (GLboolean)status == GL_TRUE;
}
// If you get an error please report on GitHub. You may try different GL context version or GLSL version.
static bool CheckProgram(GLuint handle, const char* desc)
{
GLint status = 0, log_length = 0;
glGetProgramiv(handle, GL_LINK_STATUS, &status);
glGetProgramiv(handle, GL_INFO_LOG_LENGTH, &log_length);
if ((GLboolean)status == GL_FALSE)
fprintf(stderr, "ERROR: ImGui_ImplOpenGL3_CreateDeviceObjects: failed to link %s! (with GLSL '%s')\n", desc, g_GlslVersionString);
if (log_length > 1)
{
ImVector<char> buf;
buf.resize((int)(log_length + 1));
glGetProgramInfoLog(handle, log_length, NULL, (GLchar*)buf.begin());
fprintf(stderr, "%s\n", buf.begin());
}
return (GLboolean)status == GL_TRUE;
}
bool ImGui_ImplOpenGL3_CreateDeviceObjects()
{
// Backup GL state
GLint last_texture, last_array_buffer;
glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &last_array_buffer);
#ifndef IMGUI_IMPL_OPENGL_ES2
GLint last_vertex_array;
glGetIntegerv(GL_VERTEX_ARRAY_BINDING, &last_vertex_array);
#endif
// Parse GLSL version string
int glsl_version = 130;
sscanf(g_GlslVersionString, "#version %d", &glsl_version);
const GLchar* vertex_shader_glsl_120 =
"uniform mat4 ProjMtx;\n"
"attribute vec2 Position;\n"
"attribute vec2 UV;\n"
"attribute vec4 Color;\n"
"varying vec2 Frag_UV;\n"
"varying vec4 Frag_Color;\n"
"void main()\n"
"{\n"
" Frag_UV = UV;\n"
" Frag_Color = Color;\n"
" gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
"}\n";
const GLchar* vertex_shader_glsl_130 =
"uniform mat4 ProjMtx;\n"
"in vec2 Position;\n"
"in vec2 UV;\n"
"in vec4 Color;\n"
"out vec2 Frag_UV;\n"
"out vec4 Frag_Color;\n"
"void main()\n"
"{\n"
" Frag_UV = UV;\n"
" Frag_Color = Color;\n"
" gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
"}\n";
const GLchar* vertex_shader_glsl_300_es =
"precision mediump float;\n"
"layout (location = 0) in vec2 Position;\n"
"layout (location = 1) in vec2 UV;\n"
"layout (location = 2) in vec4 Color;\n"
"uniform mat4 ProjMtx;\n"
"out vec2 Frag_UV;\n"
"out vec4 Frag_Color;\n"
"void main()\n"
"{\n"
" Frag_UV = UV;\n"
" Frag_Color = Color;\n"
" gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
"}\n";
const GLchar* vertex_shader_glsl_410_core =
"layout (location = 0) in vec2 Position;\n"
"layout (location = 1) in vec2 UV;\n"
"layout (location = 2) in vec4 Color;\n"
"uniform mat4 ProjMtx;\n"
"out vec2 Frag_UV;\n"
"out vec4 Frag_Color;\n"
"void main()\n"
"{\n"
" Frag_UV = UV;\n"
" Frag_Color = Color;\n"
" gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
"}\n";
const GLchar* fragment_shader_glsl_120 =
"#ifdef GL_ES\n"
" precision mediump float;\n"
"#endif\n"
"uniform sampler2D Texture;\n"
"varying vec2 Frag_UV;\n"
"varying vec4 Frag_Color;\n"
"void main()\n"
"{\n"
" vec4 col = Frag_Color * texture2D(Texture, Frag_UV.st);\n"
" col.xyz *= col.w;"
" gl_FragColor = col;\n"
"}\n";
const GLchar* fragment_shader_glsl_130 =
"uniform sampler2D Texture;\n"
"in vec2 Frag_UV;\n"
"in vec4 Frag_Color;\n"
"out vec4 Out_Color;\n"
"void main()\n"
"{\n"
" vec4 col = Frag_Color * texture2D(Texture, Frag_UV.st);\n"
" col.xyz *= col.w;"
" gl_FragColor = col;\n"
"}\n";
const GLchar* fragment_shader_glsl_300_es =
"precision mediump float;\n"
"uniform sampler2D Texture;\n"
"in vec2 Frag_UV;\n"
"in vec4 Frag_Color;\n"
"layout (location = 0) out vec4 Out_Color;\n"
"void main()\n"
"{\n"
" vec4 col = Frag_Color * texture2D(Texture, Frag_UV.st);\n"
" col.xyz *= col.w;"
" gl_FragColor = col;\n"
"}\n";
const GLchar* fragment_shader_glsl_410_core =
"in vec2 Frag_UV;\n"
"in vec4 Frag_Color;\n"
"uniform sampler2D Texture;\n"
"layout (location = 0) out vec4 Out_Color;\n"
"void main()\n"
"{\n"
" vec4 col = Frag_Color * texture2D(Texture, Frag_UV.st);\n"
" col.xyz *= col.w;"
" gl_FragColor = col;\n"
"}\n";
// Select shaders matching our GLSL versions
const GLchar* vertex_shader = NULL;
const GLchar* fragment_shader = NULL;
if (glsl_version < 130)
{
vertex_shader = vertex_shader_glsl_120;
fragment_shader = fragment_shader_glsl_120;
}
else if (glsl_version >= 410)
{
vertex_shader = vertex_shader_glsl_410_core;
fragment_shader = fragment_shader_glsl_410_core;
}
else if (glsl_version == 300)
{
vertex_shader = vertex_shader_glsl_300_es;
fragment_shader = fragment_shader_glsl_300_es;
}
else
{
vertex_shader = vertex_shader_glsl_130;
fragment_shader = fragment_shader_glsl_130;
}
// Create shaders
const GLchar* vertex_shader_with_version[2] = { g_GlslVersionString, vertex_shader };
g_VertHandle = glCreateShader(GL_VERTEX_SHADER);
glShaderSource(g_VertHandle, 2, vertex_shader_with_version, NULL);
glCompileShader(g_VertHandle);
CheckShader(g_VertHandle, "vertex shader");
const GLchar* fragment_shader_with_version[2] = { g_GlslVersionString, fragment_shader };
g_FragHandle = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(g_FragHandle, 2, fragment_shader_with_version, NULL);
glCompileShader(g_FragHandle);
CheckShader(g_FragHandle, "fragment shader");
g_ShaderHandle = glCreateProgram();
glAttachShader(g_ShaderHandle, g_VertHandle);
glAttachShader(g_ShaderHandle, g_FragHandle);
glLinkProgram(g_ShaderHandle);
CheckProgram(g_ShaderHandle, "shader program");
g_AttribLocationTex = glGetUniformLocation(g_ShaderHandle, "Texture");
g_AttribLocationProjMtx = glGetUniformLocation(g_ShaderHandle, "ProjMtx");
g_AttribLocationVtxPos = (GLuint)glGetAttribLocation(g_ShaderHandle, "Position");
g_AttribLocationVtxUV = (GLuint)glGetAttribLocation(g_ShaderHandle, "UV");
g_AttribLocationVtxColor = (GLuint)glGetAttribLocation(g_ShaderHandle, "Color");
// Create buffers
glGenBuffers(1, &g_VboHandle);
glGenBuffers(1, &g_ElementsHandle);
ImGui_ImplOpenGL3_CreateFontsTexture();
// Restore modified GL state
glBindTexture(GL_TEXTURE_2D, last_texture);
glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer);
#ifndef IMGUI_IMPL_OPENGL_ES2
glBindVertexArray(last_vertex_array);
#endif
return true;
}
void ImGui_ImplOpenGL3_DestroyDeviceObjects()
{
if (g_VboHandle) { glDeleteBuffers(1, &g_VboHandle); g_VboHandle = 0; }
if (g_ElementsHandle) { glDeleteBuffers(1, &g_ElementsHandle); g_ElementsHandle = 0; }
if (g_ShaderHandle && g_VertHandle) { glDetachShader(g_ShaderHandle, g_VertHandle); }
if (g_ShaderHandle && g_FragHandle) { glDetachShader(g_ShaderHandle, g_FragHandle); }
if (g_VertHandle) { glDeleteShader(g_VertHandle); g_VertHandle = 0; }
if (g_FragHandle) { glDeleteShader(g_FragHandle); g_FragHandle = 0; }
if (g_ShaderHandle) { glDeleteProgram(g_ShaderHandle); g_ShaderHandle = 0; }
ImGui_ImplOpenGL3_DestroyFontsTexture();
}

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// dear imgui: Renderer for modern OpenGL with shaders / programmatic pipeline
// - Desktop GL: 2.x 3.x 4.x
// - Embedded GL: ES 2.0 (WebGL 1.0), ES 3.0 (WebGL 2.0)
// This needs to be used along with a Platform Binding (e.g. GLFW, SDL, Win32, custom..)
// Implemented features:
// [X] Renderer: User texture binding. Use 'GLuint' OpenGL texture identifier as void*/ImTextureID. Read the FAQ about ImTextureID!
// [x] Renderer: Desktop GL only: Support for large meshes (64k+ vertices) with 16-bit indices.
// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp.
// https://github.com/ocornut/imgui
// About Desktop OpenGL function loaders:
// Modern Desktop OpenGL doesn't have a standard portable header file to load OpenGL function pointers.
// Helper libraries are often used for this purpose! Here we are supporting a few common ones (gl3w, glew, glad).
// You may use another loader/header of your choice (glext, glLoadGen, etc.), or chose to manually implement your own.
// About GLSL version:
// The 'glsl_version' initialization parameter should be NULL (default) or a "#version XXX" string.
// On computer platform the GLSL version default to "#version 130". On OpenGL ES 3 platform it defaults to "#version 300 es"
// Only override if your GL version doesn't handle this GLSL version. See GLSL version table at the top of imgui_impl_opengl3.cpp.
#pragma once
#include "imgui.h" // IMGUI_IMPL_API
// Backend API
IMGUI_IMPL_API bool ImGui_ImplOpenGL3_Init(const char* glsl_version = NULL);
IMGUI_IMPL_API void ImGui_ImplOpenGL3_Shutdown();
IMGUI_IMPL_API void ImGui_ImplOpenGL3_NewFrame();
IMGUI_IMPL_API void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data);
// (Optional) Called by Init/NewFrame/Shutdown
IMGUI_IMPL_API bool ImGui_ImplOpenGL3_CreateFontsTexture();
IMGUI_IMPL_API void ImGui_ImplOpenGL3_DestroyFontsTexture();
IMGUI_IMPL_API bool ImGui_ImplOpenGL3_CreateDeviceObjects();
IMGUI_IMPL_API void ImGui_ImplOpenGL3_DestroyDeviceObjects();
// Specific OpenGL ES versions
//#define IMGUI_IMPL_OPENGL_ES2 // Auto-detected on Emscripten
//#define IMGUI_IMPL_OPENGL_ES3 // Auto-detected on iOS/Android
// Attempt to auto-detect the default Desktop GL loader based on available header files.
// If auto-detection fails or doesn't select the same GL loader file as used by your application,
// you are likely to get a crash in ImGui_ImplOpenGL3_Init().
// You can explicitly select a loader by using one of the '#define IMGUI_IMPL_OPENGL_LOADER_XXX' in imconfig.h or compiler command-line.
#if !defined(IMGUI_IMPL_OPENGL_ES2) \
&& !defined(IMGUI_IMPL_OPENGL_ES3) \
&& !defined(IMGUI_IMPL_OPENGL_LOADER_GL3W) \
&& !defined(IMGUI_IMPL_OPENGL_LOADER_GLEW) \
&& !defined(IMGUI_IMPL_OPENGL_LOADER_GLAD) \
&& !defined(IMGUI_IMPL_OPENGL_LOADER_GLAD2) \
&& !defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2) \
&& !defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING3) \
&& !defined(IMGUI_IMPL_OPENGL_LOADER_CUSTOM)
// Try to detect GLES on matching platforms
#if defined(__APPLE__)
#include "TargetConditionals.h"
#endif
#if (defined(__APPLE__) && (TARGET_OS_IOS || TARGET_OS_TV)) || (defined(__ANDROID__))
#define IMGUI_IMPL_OPENGL_ES3 // iOS, Android -> GL ES 3, "#version 300 es"
#elif defined(__EMSCRIPTEN__)
#define IMGUI_IMPL_OPENGL_ES2 // Emscripten -> GL ES 2, "#version 100"
// Otherwise try to detect supported Desktop OpenGL loaders..
#elif defined(__has_include)
#if __has_include(<GL/glew.h>)
#define IMGUI_IMPL_OPENGL_LOADER_GLEW
#elif __has_include(<glad/glad.h>)
#define IMGUI_IMPL_OPENGL_LOADER_GLAD
#elif __has_include(<glad/gl.h>)
#define IMGUI_IMPL_OPENGL_LOADER_GLAD2
#elif __has_include(<GL/gl3w.h>)
#define IMGUI_IMPL_OPENGL_LOADER_GL3W
#elif __has_include(<glbinding/glbinding.h>)
#define IMGUI_IMPL_OPENGL_LOADER_GLBINDING3
#elif __has_include(<glbinding/Binding.h>)
#define IMGUI_IMPL_OPENGL_LOADER_GLBINDING2
#else
#error "Cannot detect OpenGL loader!"
#endif
#else
#define IMGUI_IMPL_OPENGL_LOADER_GL3W // Default to GL3W embedded in our repository
#endif
#endif

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// dear imgui: Platform Binding for Windows (standard windows API for 32 and 64 bits applications)
// This needs to be used along with a Renderer (e.g. DirectX11, OpenGL3, Vulkan..)
// Implemented features:
// [X] Platform: Clipboard support (for Win32 this is actually part of core dear imgui)
// [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
// [X] Platform: Keyboard arrays indexed using VK_* Virtual Key Codes, e.g. ImGui::IsKeyPressed(VK_SPACE).
// [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
#include "imgui.h"
#include "imgui_impl_win32.h"
#include "imgui_extra_keys.h"
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
#include <windows.h>
#include <tchar.h>
// Using XInput library for gamepad (with recent Windows SDK this may leads to executables which won't run on Windows 7)
#ifndef IMGUI_IMPL_WIN32_DISABLE_GAMEPAD
#include <XInput.h>
#else
#define IMGUI_IMPL_WIN32_DISABLE_LINKING_XINPUT
#endif
#if defined(_MSC_VER) && !defined(IMGUI_IMPL_WIN32_DISABLE_LINKING_XINPUT)
#pragma comment(lib, "xinput")
//#pragma comment(lib, "Xinput9_1_0")
#endif
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2020-03-03: Inputs: Calling AddInputCharacterUTF16() to support surrogate pairs leading to codepoint >= 0x10000 (for more complete CJK inputs)
// 2020-02-17: Added ImGui_ImplWin32_EnableDpiAwareness(), ImGui_ImplWin32_GetDpiScaleForHwnd(), ImGui_ImplWin32_GetDpiScaleForMonitor() helper functions.
// 2020-01-14: Inputs: Added support for #define IMGUI_IMPL_WIN32_DISABLE_GAMEPAD/IMGUI_IMPL_WIN32_DISABLE_LINKING_XINPUT.
// 2019-12-05: Inputs: Added support for ImGuiMouseCursor_NotAllowed mouse cursor.
// 2019-05-11: Inputs: Don't filter value from WM_CHAR before calling AddInputCharacter().
// 2019-01-17: Misc: Using GetForegroundWindow()+IsChild() instead of GetActiveWindow() to be compatible with windows created in a different thread or parent.
// 2019-01-17: Inputs: Added support for mouse buttons 4 and 5 via WM_XBUTTON* messages.
// 2019-01-15: Inputs: Added support for XInput gamepads (if ImGuiConfigFlags_NavEnableGamepad is set by user application).
// 2018-11-30: Misc: Setting up io.BackendPlatformName so it can be displayed in the About Window.
// 2018-06-29: Inputs: Added support for the ImGuiMouseCursor_Hand cursor.
// 2018-06-10: Inputs: Fixed handling of mouse wheel messages to support fine position messages (typically sent by track-pads).
// 2018-06-08: Misc: Extracted imgui_impl_win32.cpp/.h away from the old combined DX9/DX10/DX11/DX12 examples.
// 2018-03-20: Misc: Setup io.BackendFlags ImGuiBackendFlags_HasMouseCursors and ImGuiBackendFlags_HasSetMousePos flags + honor ImGuiConfigFlags_NoMouseCursorChange flag.
// 2018-02-20: Inputs: Added support for mouse cursors (ImGui::GetMouseCursor() value and WM_SETCURSOR message handling).
// 2018-02-06: Inputs: Added mapping for ImGuiKey_Space.
// 2018-02-06: Inputs: Honoring the io.WantSetMousePos by repositioning the mouse (when using navigation and ImGuiConfigFlags_NavMoveMouse is set).
// 2018-02-06: Misc: Removed call to ImGui::Shutdown() which is not available from 1.60 WIP, user needs to call CreateContext/DestroyContext themselves.
// 2018-01-20: Inputs: Added Horizontal Mouse Wheel support.
// 2018-01-08: Inputs: Added mapping for ImGuiKey_Insert.
// 2018-01-05: Inputs: Added WM_LBUTTONDBLCLK double-click handlers for window classes with the CS_DBLCLKS flag.
// 2017-10-23: Inputs: Added WM_SYSKEYDOWN / WM_SYSKEYUP handlers so e.g. the VK_MENU key can be read.
// 2017-10-23: Inputs: Using Win32 ::SetCapture/::GetCapture() to retrieve mouse positions outside the client area when dragging.
// 2016-11-12: Inputs: Only call Win32 ::SetCursor(NULL) when io.MouseDrawCursor is set.
// Win32 Data
static HWND g_hWnd = NULL;
static INT64 g_Time = 0;
static INT64 g_TicksPerSecond = 0;
static ImGuiMouseCursor g_LastMouseCursor = ImGuiMouseCursor_COUNT;
static bool g_HasGamepad = false;
static bool g_WantUpdateHasGamepad = true;
// Functions
bool ImGui_ImplWin32_Init(void* hwnd)
{
if (!::QueryPerformanceFrequency((LARGE_INTEGER*)&g_TicksPerSecond))
return false;
if (!::QueryPerformanceCounter((LARGE_INTEGER*)&g_Time))
return false;
// Setup back-end capabilities flags
g_hWnd = (HWND)hwnd;
ImGuiIO& io = ImGui::GetIO();
io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors; // We can honor GetMouseCursor() values (optional)
io.BackendFlags |= ImGuiBackendFlags_HasSetMousePos; // We can honor io.WantSetMousePos requests (optional, rarely used)
io.BackendPlatformName = "imgui_impl_win32";
//io.ImeWindowHandle = hwnd;
// Keyboard mapping. ImGui will use those indices to peek into the io.KeysDown[] array that we will update during the application lifetime.
io.KeyMap[ImGuiKey_Tab] = VK_TAB;
io.KeyMap[ImGuiKey_LeftArrow] = VK_LEFT;
io.KeyMap[ImGuiKey_RightArrow] = VK_RIGHT;
io.KeyMap[ImGuiKey_UpArrow] = VK_UP;
io.KeyMap[ImGuiKey_DownArrow] = VK_DOWN;
io.KeyMap[ImGuiKey_PageUp] = VK_PRIOR;
io.KeyMap[ImGuiKey_PageDown] = VK_NEXT;
io.KeyMap[ImGuiKey_Home] = VK_HOME;
io.KeyMap[ImGuiKey_End] = VK_END;
io.KeyMap[ImGuiKey_Insert] = VK_INSERT;
io.KeyMap[ImGuiKey_Delete] = VK_DELETE;
io.KeyMap[ImGuiKey_Backspace] = VK_BACK;
io.KeyMap[ImGuiKey_Space] = VK_SPACE;
io.KeyMap[ImGuiKey_Enter] = VK_RETURN;
io.KeyMap[ImGuiKey_Escape] = VK_ESCAPE;
io.KeyMap[ImGuiKey_KeyPadEnter] = VK_RETURN;
io.KeyMap[ImGuiKey_A] = 'A';
io.KeyMap[ImGuiKey_C] = 'C';
io.KeyMap[ImGuiKey_V] = 'V';
io.KeyMap[ImGuiKey_X] = 'X';
io.KeyMap[ImGuiKey_Y] = 'Y';
io.KeyMap[ImGuiKey_Z] = 'Z';
int f_index = GetEnumValueForF();
int d_index = GetEnumValueForD();
if (f_index >= 0)
io.KeyMap[f_index] = 'F';
if (d_index >= 0)
io.KeyMap[d_index] = 'D';
return true;
}
void ImGui_ImplWin32_Shutdown()
{
g_hWnd = (HWND)0;
}
static bool ImGui_ImplWin32_UpdateMouseCursor()
{
ImGuiIO& io = ImGui::GetIO();
if (io.ConfigFlags & ImGuiConfigFlags_NoMouseCursorChange)
return false;
ImGuiMouseCursor imgui_cursor = ImGui::GetMouseCursor();
if (imgui_cursor == ImGuiMouseCursor_None || io.MouseDrawCursor)
{
// Hide OS mouse cursor if imgui is drawing it or if it wants no cursor
::SetCursor(NULL);
}
else
{
// Show OS mouse cursor
LPTSTR win32_cursor = IDC_ARROW;
switch (imgui_cursor)
{
case ImGuiMouseCursor_Arrow: win32_cursor = IDC_ARROW; break;
case ImGuiMouseCursor_TextInput: win32_cursor = IDC_IBEAM; break;
case ImGuiMouseCursor_ResizeAll: win32_cursor = IDC_SIZEALL; break;
case ImGuiMouseCursor_ResizeEW: win32_cursor = IDC_SIZEWE; break;
case ImGuiMouseCursor_ResizeNS: win32_cursor = IDC_SIZENS; break;
case ImGuiMouseCursor_ResizeNESW: win32_cursor = IDC_SIZENESW; break;
case ImGuiMouseCursor_ResizeNWSE: win32_cursor = IDC_SIZENWSE; break;
case ImGuiMouseCursor_Hand: win32_cursor = IDC_HAND; break;
case ImGuiMouseCursor_NotAllowed: win32_cursor = IDC_NO; break;
}
::SetCursor(::LoadCursor(NULL, win32_cursor));
}
return true;
}
static void ImGui_ImplWin32_UpdateMousePos()
{
ImGuiIO& io = ImGui::GetIO();
// Set OS mouse position if requested (rarely used, only when ImGuiConfigFlags_NavEnableSetMousePos is enabled by user)
if (io.WantSetMousePos)
{
POINT pos = { (int)(io.MousePos.x), (int)(io.MousePos.y) };
::ClientToScreen(g_hWnd, &pos);
::SetCursorPos(pos.x, pos.y);
}
// Set mouse position
io.MousePos = ImVec2(-FLT_MAX, -FLT_MAX);
POINT pos;
if (HWND active_window = ::GetForegroundWindow())
if (active_window == g_hWnd || ::IsChild(active_window, g_hWnd))
if (::GetCursorPos(&pos) && ::ScreenToClient(g_hWnd, &pos))
io.MousePos = ImVec2((float)pos.x, (float)pos.y);
}
// Gamepad navigation mapping
static void ImGui_ImplWin32_UpdateGamepads()
{
#ifndef IMGUI_IMPL_WIN32_DISABLE_GAMEPAD
ImGuiIO& io = ImGui::GetIO();
memset(io.NavInputs, 0, sizeof(io.NavInputs));
if ((io.ConfigFlags & ImGuiConfigFlags_NavEnableGamepad) == 0)
return;
// Calling XInputGetState() every frame on disconnected gamepads is unfortunately too slow.
// Instead we refresh gamepad availability by calling XInputGetCapabilities() _only_ after receiving WM_DEVICECHANGE.
if (g_WantUpdateHasGamepad)
{
XINPUT_CAPABILITIES caps;
g_HasGamepad = (XInputGetCapabilities(0, XINPUT_FLAG_GAMEPAD, &caps) == ERROR_SUCCESS);
g_WantUpdateHasGamepad = false;
}
XINPUT_STATE xinput_state;
io.BackendFlags &= ~ImGuiBackendFlags_HasGamepad;
if (g_HasGamepad && XInputGetState(0, &xinput_state) == ERROR_SUCCESS)
{
const XINPUT_GAMEPAD& gamepad = xinput_state.Gamepad;
io.BackendFlags |= ImGuiBackendFlags_HasGamepad;
#define MAP_BUTTON(NAV_NO, BUTTON_ENUM) { io.NavInputs[NAV_NO] = (gamepad.wButtons & BUTTON_ENUM) ? 1.0f : 0.0f; }
#define MAP_ANALOG(NAV_NO, VALUE, V0, V1) { float vn = (float)(VALUE - V0) / (float)(V1 - V0); if (vn > 1.0f) vn = 1.0f; if (vn > 0.0f && io.NavInputs[NAV_NO] < vn) io.NavInputs[NAV_NO] = vn; }
MAP_BUTTON(ImGuiNavInput_Activate, XINPUT_GAMEPAD_A); // Cross / A
MAP_BUTTON(ImGuiNavInput_Cancel, XINPUT_GAMEPAD_B); // Circle / B
MAP_BUTTON(ImGuiNavInput_Menu, XINPUT_GAMEPAD_X); // Square / X
MAP_BUTTON(ImGuiNavInput_Input, XINPUT_GAMEPAD_Y); // Triangle / Y
MAP_BUTTON(ImGuiNavInput_DpadLeft, XINPUT_GAMEPAD_DPAD_LEFT); // D-Pad Left
MAP_BUTTON(ImGuiNavInput_DpadRight, XINPUT_GAMEPAD_DPAD_RIGHT); // D-Pad Right
MAP_BUTTON(ImGuiNavInput_DpadUp, XINPUT_GAMEPAD_DPAD_UP); // D-Pad Up
MAP_BUTTON(ImGuiNavInput_DpadDown, XINPUT_GAMEPAD_DPAD_DOWN); // D-Pad Down
MAP_BUTTON(ImGuiNavInput_FocusPrev, XINPUT_GAMEPAD_LEFT_SHOULDER); // L1 / LB
MAP_BUTTON(ImGuiNavInput_FocusNext, XINPUT_GAMEPAD_RIGHT_SHOULDER); // R1 / RB
MAP_BUTTON(ImGuiNavInput_TweakSlow, XINPUT_GAMEPAD_LEFT_SHOULDER); // L1 / LB
MAP_BUTTON(ImGuiNavInput_TweakFast, XINPUT_GAMEPAD_RIGHT_SHOULDER); // R1 / RB
MAP_ANALOG(ImGuiNavInput_LStickLeft, gamepad.sThumbLX, -XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE, -32768);
MAP_ANALOG(ImGuiNavInput_LStickRight, gamepad.sThumbLX, +XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE, +32767);
MAP_ANALOG(ImGuiNavInput_LStickUp, gamepad.sThumbLY, +XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE, +32767);
MAP_ANALOG(ImGuiNavInput_LStickDown, gamepad.sThumbLY, -XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE, -32767);
#undef MAP_BUTTON
#undef MAP_ANALOG
}
#endif // #ifndef IMGUI_IMPL_WIN32_DISABLE_GAMEPAD
}
void ImGui_ImplWin32_NewFrame()
{
ImGuiIO& io = ImGui::GetIO();
IM_ASSERT(io.Fonts->IsBuilt() && "Font atlas not built! It is generally built by the renderer back-end. Missing call to renderer _NewFrame() function? e.g. ImGui_ImplOpenGL3_NewFrame().");
// Setup display size (every frame to accommodate for window resizing)
RECT rect;
::GetClientRect(g_hWnd, &rect);
io.DisplaySize = ImVec2((float)(rect.right - rect.left), (float)(rect.bottom - rect.top));
// Setup time step
INT64 current_time;
::QueryPerformanceCounter((LARGE_INTEGER*)&current_time);
io.DeltaTime = (float)(current_time - g_Time) / g_TicksPerSecond;
g_Time = current_time;
// Read keyboard modifiers inputs
io.KeyCtrl = (::GetKeyState(VK_CONTROL) & 0x8000) != 0;
io.KeyShift = (::GetKeyState(VK_SHIFT) & 0x8000) != 0;
io.KeyAlt = (::GetKeyState(VK_MENU) & 0x8000) != 0;
io.KeySuper = false;
// io.KeysDown[], io.MousePos, io.MouseDown[], io.MouseWheel: filled by the WndProc handler below.
// Update OS mouse position
ImGui_ImplWin32_UpdateMousePos();
// Update OS mouse cursor with the cursor requested by imgui
ImGuiMouseCursor mouse_cursor = io.MouseDrawCursor ? ImGuiMouseCursor_None : ImGui::GetMouseCursor();
if (g_LastMouseCursor != mouse_cursor)
{
g_LastMouseCursor = mouse_cursor;
ImGui_ImplWin32_UpdateMouseCursor();
}
// Update game controllers (if enabled and available)
ImGui_ImplWin32_UpdateGamepads();
}
// Allow compilation with old Windows SDK. MinGW doesn't have default _WIN32_WINNT/WINVER versions.
#ifndef WM_MOUSEHWHEEL
#define WM_MOUSEHWHEEL 0x020E
#endif
#ifndef DBT_DEVNODES_CHANGED
#define DBT_DEVNODES_CHANGED 0x0007
#endif
// Win32 message handler (process Win32 mouse/keyboard inputs, etc.)
// Call from your application's message handler.
// When implementing your own back-end, you can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if Dear ImGui wants to use your inputs.
// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application.
// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application.
// Generally you may always pass all inputs to Dear ImGui, and hide them from your application based on those two flags.
// PS: In this Win32 handler, we use the capture API (GetCapture/SetCapture/ReleaseCapture) to be able to read mouse coordinates when dragging mouse outside of our window bounds.
// PS: We treat DBLCLK messages as regular mouse down messages, so this code will work on windows classes that have the CS_DBLCLKS flag set. Our own example app code doesn't set this flag.
#if 0
// Copy this line into your .cpp file to forward declare the function.
extern IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
#endif
IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
if (ImGui::GetCurrentContext() == NULL)
return 0;
ImGuiIO& io = ImGui::GetIO();
switch (msg)
{
case WM_LBUTTONDOWN: case WM_LBUTTONDBLCLK:
case WM_RBUTTONDOWN: case WM_RBUTTONDBLCLK:
case WM_MBUTTONDOWN: case WM_MBUTTONDBLCLK:
case WM_XBUTTONDOWN: case WM_XBUTTONDBLCLK:
{
int button = 0;
if (msg == WM_LBUTTONDOWN || msg == WM_LBUTTONDBLCLK) { button = 0; }
if (msg == WM_RBUTTONDOWN || msg == WM_RBUTTONDBLCLK) { button = 1; }
if (msg == WM_MBUTTONDOWN || msg == WM_MBUTTONDBLCLK) { button = 2; }
if (msg == WM_XBUTTONDOWN || msg == WM_XBUTTONDBLCLK) { button = (GET_XBUTTON_WPARAM(wParam) == XBUTTON1) ? 3 : 4; }
if (!ImGui::IsAnyMouseDown() && ::GetCapture() == NULL)
::SetCapture(hwnd);
io.MouseDown[button] = true;
return 0;
}
case WM_LBUTTONUP:
case WM_RBUTTONUP:
case WM_MBUTTONUP:
case WM_XBUTTONUP:
{
int button = 0;
if (msg == WM_LBUTTONUP) { button = 0; }
if (msg == WM_RBUTTONUP) { button = 1; }
if (msg == WM_MBUTTONUP) { button = 2; }
if (msg == WM_XBUTTONUP) { button = (GET_XBUTTON_WPARAM(wParam) == XBUTTON1) ? 3 : 4; }
io.MouseDown[button] = false;
if (!ImGui::IsAnyMouseDown() && ::GetCapture() == hwnd)
::ReleaseCapture();
return 0;
}
case WM_MOUSEWHEEL:
io.MouseWheel += (float)GET_WHEEL_DELTA_WPARAM(wParam) / (float)WHEEL_DELTA;
return 0;
case WM_MOUSEHWHEEL:
io.MouseWheelH += (float)GET_WHEEL_DELTA_WPARAM(wParam) / (float)WHEEL_DELTA;
return 0;
case WM_KEYDOWN:
case WM_SYSKEYDOWN:
if (wParam < 256)
io.KeysDown[wParam] = 1;
return 0;
case WM_KEYUP:
case WM_SYSKEYUP:
if (wParam < 256)
io.KeysDown[wParam] = 0;
return 0;
case WM_CHAR:
// You can also use ToAscii()+GetKeyboardState() to retrieve characters.
if (wParam > 0 && wParam < 0x10000)
io.AddInputCharacterUTF16((unsigned short)wParam);
return 0;
case WM_SETCURSOR:
if (LOWORD(lParam) == HTCLIENT && ImGui_ImplWin32_UpdateMouseCursor())
return 1;
return 0;
case WM_DEVICECHANGE:
if ((UINT)wParam == DBT_DEVNODES_CHANGED)
g_WantUpdateHasGamepad = true;
return 0;
case WM_KILLFOCUS:
for (int n = 0; n < IM_ARRAYSIZE(io.KeysDown); n++)
io.KeysDown[n] = false;
break;
}
return 0;
}
//--------------------------------------------------------------------------------------------------------
// DPI-related helpers (optional)
//--------------------------------------------------------------------------------------------------------
// - Use to enable DPI awareness without having to create an application manifest.
// - Your own app may already do this via a manifest or explicit calls. This is mostly useful for our examples/ apps.
// - In theory we could call simple functions from Windows SDK such as SetProcessDPIAware(), SetProcessDpiAwareness(), etc.
// but most of the functions provided by Microsoft require Windows 8.1/10+ SDK at compile time and Windows 8/10+ at runtime,
// neither we want to require the user to have. So we dynamically select and load those functions to avoid dependencies.
//---------------------------------------------------------------------------------------------------------
// This is the scheme successfully used by GLFW (from which we borrowed some of the code) and other apps aiming to be highly portable.
// ImGui_ImplWin32_EnableDpiAwareness() is just a helper called by main.cpp, we don't call it automatically.
// If you are trying to implement your own back-end for your own engine, you may ignore that noise.
//---------------------------------------------------------------------------------------------------------
// Implement some of the functions and types normally declared in recent Windows SDK.
#if !defined(_versionhelpers_H_INCLUDED_) && !defined(_INC_VERSIONHELPERS)
static BOOL IsWindowsVersionOrGreater(WORD major, WORD minor, WORD sp)
{
OSVERSIONINFOEXW osvi = { sizeof(osvi), major, minor, 0, 0, { 0 }, sp, 0, 0, 0, 0 };
DWORD mask = VER_MAJORVERSION | VER_MINORVERSION | VER_SERVICEPACKMAJOR;
ULONGLONG cond = ::VerSetConditionMask(0, VER_MAJORVERSION, VER_GREATER_EQUAL);
cond = ::VerSetConditionMask(cond, VER_MINORVERSION, VER_GREATER_EQUAL);
cond = ::VerSetConditionMask(cond, VER_SERVICEPACKMAJOR, VER_GREATER_EQUAL);
return ::VerifyVersionInfoW(&osvi, mask, cond);
}
#define IsWindows8Point1OrGreater() IsWindowsVersionOrGreater(HIBYTE(0x0602), LOBYTE(0x0602), 0) // _WIN32_WINNT_WINBLUE
#endif
#ifndef DPI_ENUMS_DECLARED
typedef enum { PROCESS_DPI_UNAWARE = 0, PROCESS_SYSTEM_DPI_AWARE = 1, PROCESS_PER_MONITOR_DPI_AWARE = 2 } PROCESS_DPI_AWARENESS;
typedef enum { MDT_EFFECTIVE_DPI = 0, MDT_ANGULAR_DPI = 1, MDT_RAW_DPI = 2, MDT_DEFAULT = MDT_EFFECTIVE_DPI } MONITOR_DPI_TYPE;
#endif
#ifndef _DPI_AWARENESS_CONTEXTS_
DECLARE_HANDLE(DPI_AWARENESS_CONTEXT);
#define DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE (DPI_AWARENESS_CONTEXT)-3
#endif
#ifndef DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2
#define DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2 (DPI_AWARENESS_CONTEXT)-4
#endif
typedef HRESULT(WINAPI* PFN_SetProcessDpiAwareness)(PROCESS_DPI_AWARENESS); // Shcore.lib + dll, Windows 8.1+
typedef HRESULT(WINAPI* PFN_GetDpiForMonitor)(HMONITOR, MONITOR_DPI_TYPE, UINT*, UINT*); // Shcore.lib + dll, Windows 8.1+
typedef DPI_AWARENESS_CONTEXT(WINAPI* PFN_SetThreadDpiAwarenessContext)(DPI_AWARENESS_CONTEXT); // User32.lib + dll, Windows 10 v1607+ (Creators Update)
// Helper function to enable DPI awareness without setting up a manifest
void ImGui_ImplWin32_EnableDpiAwareness()
{
// if (IsWindows10OrGreater()) // This needs a manifest to succeed. Instead we try to grab the function pointer!
{
static HINSTANCE user32_dll = ::LoadLibraryA("user32.dll"); // Reference counted per-process
if (PFN_SetThreadDpiAwarenessContext SetThreadDpiAwarenessContextFn = (PFN_SetThreadDpiAwarenessContext)::GetProcAddress(user32_dll, "SetThreadDpiAwarenessContext"))
{
SetThreadDpiAwarenessContextFn(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2);
return;
}
}
if (IsWindows8Point1OrGreater())
{
static HINSTANCE shcore_dll = ::LoadLibraryA("shcore.dll"); // Reference counted per-process
if (PFN_SetProcessDpiAwareness SetProcessDpiAwarenessFn = (PFN_SetProcessDpiAwareness)::GetProcAddress(shcore_dll, "SetProcessDpiAwareness"))
{
SetProcessDpiAwarenessFn(PROCESS_PER_MONITOR_DPI_AWARE);
return;
}
}
#if _WIN32_WINNT >= 0x0600
::SetProcessDPIAware();
#endif
}
#if defined(_MSC_VER) && !defined(NOGDI)
#pragma comment(lib, "gdi32") // Link with gdi32.lib for GetDeviceCaps()
#endif
float ImGui_ImplWin32_GetDpiScaleForMonitor(void* monitor)
{
UINT xdpi = 96, ydpi = 96;
static BOOL bIsWindows8Point1OrGreater = IsWindows8Point1OrGreater();
if (bIsWindows8Point1OrGreater)
{
static HINSTANCE shcore_dll = ::LoadLibraryA("shcore.dll"); // Reference counted per-process
if (PFN_GetDpiForMonitor GetDpiForMonitorFn = (PFN_GetDpiForMonitor)::GetProcAddress(shcore_dll, "GetDpiForMonitor"))
GetDpiForMonitorFn((HMONITOR)monitor, MDT_EFFECTIVE_DPI, &xdpi, &ydpi);
}
#ifndef NOGDI
else
{
const HDC dc = ::GetDC(NULL);
xdpi = ::GetDeviceCaps(dc, LOGPIXELSX);
ydpi = ::GetDeviceCaps(dc, LOGPIXELSY);
::ReleaseDC(NULL, dc);
}
#endif
IM_ASSERT(xdpi == ydpi); // Please contact me if you hit this assert!
return xdpi / 96.0f;
}
float ImGui_ImplWin32_GetDpiScaleForHwnd(void* hwnd)
{
HMONITOR monitor = ::MonitorFromWindow((HWND)hwnd, MONITOR_DEFAULTTONEAREST);
return ImGui_ImplWin32_GetDpiScaleForMonitor(monitor);
}
//---------------------------------------------------------------------------------------------------------

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// dear imgui: Platform Binding for Windows (standard windows API for 32 and 64 bits applications)
// This needs to be used along with a Renderer (e.g. DirectX11, OpenGL3, Vulkan..)
// Implemented features:
// [X] Platform: Clipboard support (for Win32 this is actually part of core dear imgui)
// [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
// [X] Platform: Keyboard arrays indexed using VK_* Virtual Key Codes, e.g. ImGui::IsKeyPressed(VK_SPACE).
// [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
#pragma once
#include "imgui.h" // IMGUI_IMPL_API
IMGUI_IMPL_API bool ImGui_ImplWin32_Init(void* hwnd);
IMGUI_IMPL_API void ImGui_ImplWin32_Shutdown();
IMGUI_IMPL_API void ImGui_ImplWin32_NewFrame();
// Configuration
// - Disable gamepad support or linking with xinput.lib
//#define IMGUI_IMPL_WIN32_DISABLE_GAMEPAD
//#define IMGUI_IMPL_WIN32_DISABLE_LINKING_XINPUT
// Win32 message handler your application need to call.
// - Intentionally commented out in a '#if 0' block to avoid dragging dependencies on <windows.h> from this helper.
// - You should COPY the line below into your .cpp code to forward declare the function and then you can call it.
#if 0
extern IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
#endif
// DPI-related helpers (optional)
// - Use to enable DPI awareness without having to create an application manifest.
// - Your own app may already do this via a manifest or explicit calls. This is mostly useful for our examples/ apps.
// - In theory we could call simple functions from Windows SDK such as SetProcessDPIAware(), SetProcessDpiAwareness(), etc.
// but most of the functions provided by Microsoft require Windows 8.1/10+ SDK at compile time and Windows 8/10+ at runtime,
// neither we want to require the user to have. So we dynamically select and load those functions to avoid dependencies.
IMGUI_IMPL_API void ImGui_ImplWin32_EnableDpiAwareness();
IMGUI_IMPL_API float ImGui_ImplWin32_GetDpiScaleForHwnd(void* hwnd); // HWND hwnd
IMGUI_IMPL_API float ImGui_ImplWin32_GetDpiScaleForMonitor(void* monitor); // HMONITOR monitor

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# pragma once
# include "setup.h"
# include <memory>
struct Application;
struct Renderer;
struct Platform
{
virtual ~Platform() {};
virtual bool ApplicationStart(int argc, char** argv) = 0;
virtual void ApplicationStop() = 0;
virtual bool OpenMainWindow(const char* title, int width, int height) = 0;
virtual bool CloseMainWindow() = 0;
virtual void* GetMainWindowHandle() const = 0;
virtual void SetMainWindowTitle(const char* title) = 0;
virtual void ShowMainWindow() = 0;
virtual bool ProcessMainWindowEvents() = 0;
virtual bool IsMainWindowVisible() const = 0;
virtual void SetRenderer(Renderer* renderer) = 0;
virtual void NewFrame() = 0;
virtual void FinishFrame() = 0;
virtual void Quit() = 0;
bool HasWindowScaleChanged() const { return m_WindowScaleChanged; }
void AcknowledgeWindowScaleChanged() { m_WindowScaleChanged = false; }
float GetWindowScale() const { return m_WindowScale; }
void SetWindowScale(float windowScale)
{
if (windowScale == m_WindowScale)
return;
m_WindowScale = windowScale;
m_WindowScaleChanged = true;
}
bool HasFramebufferScaleChanged() const { return m_FramebufferScaleChanged; }
void AcknowledgeFramebufferScaleChanged() { m_FramebufferScaleChanged = false; }
float GetFramebufferScale() const { return m_FramebufferScale; }
void SetFramebufferScale(float framebufferScale)
{
if (framebufferScale == m_FramebufferScale)
return;
m_FramebufferScale = framebufferScale;
m_FramebufferScaleChanged = true;
}
private:
bool m_WindowScaleChanged = false;
float m_WindowScale = 1.0f;
bool m_FramebufferScaleChanged = false;
float m_FramebufferScale = 1.0f;
};
std::unique_ptr<Platform> CreatePlatform(Application& application);

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# include "platform.h"
# include "setup.h"
# if BACKEND(IMGUI_GLFW)
# include "application.h"
# include "renderer.h"
# include <GLFW/glfw3.h>
# if PLATFORM(WINDOWS)
# define GLFW_EXPOSE_NATIVE_WIN32
# include <GLFW/glfw3native.h>
# endif
# include <imgui.h>
# include "imgui_impl_glfw.h"
struct PlatformGLFW final
: Platform
{
static PlatformGLFW* s_Instance;
PlatformGLFW(Application& application);
bool ApplicationStart(int argc, char** argv) override;
void ApplicationStop() override;
bool OpenMainWindow(const char* title, int width, int height) override;
bool CloseMainWindow() override;
void* GetMainWindowHandle() const override;
void SetMainWindowTitle(const char* title) override;
void ShowMainWindow() override;
bool ProcessMainWindowEvents() override;
bool IsMainWindowVisible() const override;
void SetRenderer(Renderer* renderer) override;
void NewFrame() override;
void FinishFrame() override;
void Quit() override;
void UpdatePixelDensity();
Application& m_Application;
GLFWwindow* m_Window = nullptr;
bool m_QuitRequested = false;
bool m_IsMinimized = false;
bool m_WasMinimized = false;
Renderer* m_Renderer = nullptr;
};
std::unique_ptr<Platform> CreatePlatform(Application& application)
{
return std::make_unique<PlatformGLFW>(application);
}
PlatformGLFW::PlatformGLFW(Application& application)
: m_Application(application)
{
}
bool PlatformGLFW::ApplicationStart(int argc, char** argv)
{
if (!glfwInit())
return false;
return true;
}
void PlatformGLFW::ApplicationStop()
{
glfwTerminate();
}
bool PlatformGLFW::OpenMainWindow(const char* title, int width, int height)
{
if (m_Window)
return false;
glfwWindowHint(GLFW_VISIBLE, 0);
using InitializerType = bool (*)(GLFWwindow* window, bool install_callbacks);
InitializerType initializer = nullptr;
# if RENDERER(IMGUI_OGL3)
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
# if PLATFORM(MACOS)
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
# ifdef GLFW_COCOA_RETINA_FRAMEBUFFER
glfwWindowHint(GLFW_COCOA_RETINA_FRAMEBUFFER, GL_TRUE);
# endif
# ifdef GLFW_COCOA_GRAPHICS_SWITCHING
glfwWindowHint(GLFW_COCOA_GRAPHICS_SWITCHING, GL_TRUE);
# endif
# endif
initializer = &ImGui_ImplGlfw_InitForOpenGL;
# else
glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
initializer = &ImGui_ImplGlfw_InitForNone;
# endif
glfwWindowHint(GLFW_SCALE_TO_MONITOR, GL_TRUE);
width = width < 0 ? 1440 : width;
height = height < 0 ? 800 : height;
m_Window = glfwCreateWindow(width, height, title, nullptr, nullptr);
if (!m_Window)
return false;
if (!initializer || !initializer(m_Window, true))
{
glfwDestroyWindow(m_Window);
m_Window = nullptr;
return false;
}
glfwSetWindowUserPointer(m_Window, this);
glfwSetWindowCloseCallback(m_Window, [](GLFWwindow* window)
{
auto self = reinterpret_cast<PlatformGLFW*>(glfwGetWindowUserPointer(window));
if (!self->m_QuitRequested)
self->CloseMainWindow();
});
glfwSetWindowIconifyCallback(m_Window, [](GLFWwindow* window, int iconified)
{
auto self = reinterpret_cast<PlatformGLFW*>(glfwGetWindowUserPointer(window));
if (iconified)
{
self->m_IsMinimized = true;
self->m_WasMinimized = true;
}
else
{
self->m_IsMinimized = false;
}
});
auto onFramebuferSizeChanged = [](GLFWwindow* window, int width, int height)
{
auto self = reinterpret_cast<PlatformGLFW*>(glfwGetWindowUserPointer(window));
if (self->m_Renderer)
{
self->m_Renderer->Resize(width, height);
self->UpdatePixelDensity();
}
};
glfwSetFramebufferSizeCallback(m_Window, onFramebuferSizeChanged);
auto onWindowContentScaleChanged = [](GLFWwindow* window, float xscale, float yscale)
{
auto self = reinterpret_cast<PlatformGLFW*>(glfwGetWindowUserPointer(window));
self->UpdatePixelDensity();
};
glfwSetWindowContentScaleCallback(m_Window, onWindowContentScaleChanged);
UpdatePixelDensity();
glfwMakeContextCurrent(m_Window);
glfwSwapInterval(1); // Enable vsync
return true;
}
bool PlatformGLFW::CloseMainWindow()
{
if (m_Window == nullptr)
return true;
auto canClose = m_Application.CanClose();
glfwSetWindowShouldClose(m_Window, canClose ? 1 : 0);
return canClose;
}
void* PlatformGLFW::GetMainWindowHandle() const
{
# if PLATFORM(WINDOWS)
return m_Window ? glfwGetWin32Window(m_Window) : nullptr;
# else
return nullptr;
# endif
}
void PlatformGLFW::SetMainWindowTitle(const char* title)
{
glfwSetWindowTitle(m_Window, title);
}
void PlatformGLFW::ShowMainWindow()
{
if (m_Window == nullptr)
return;
glfwShowWindow(m_Window);
}
bool PlatformGLFW::ProcessMainWindowEvents()
{
if (m_Window == nullptr)
return false;
if (m_IsMinimized)
glfwWaitEvents();
else
glfwPollEvents();
if (m_QuitRequested || glfwWindowShouldClose(m_Window))
{
ImGui_ImplGlfw_Shutdown();
glfwDestroyWindow(m_Window);
return false;
}
return true;
}
bool PlatformGLFW::IsMainWindowVisible() const
{
if (m_Window == nullptr)
return false;
if (m_IsMinimized)
return false;
return true;
}
void PlatformGLFW::SetRenderer(Renderer* renderer)
{
m_Renderer = renderer;
}
void PlatformGLFW::NewFrame()
{
ImGui_ImplGlfw_NewFrame();
if (m_WasMinimized)
{
ImGui::GetIO().DeltaTime = 0.1e-6f;
m_WasMinimized = false;
}
}
void PlatformGLFW::FinishFrame()
{
if (m_Renderer)
m_Renderer->Present();
glfwSwapBuffers(m_Window);
}
void PlatformGLFW::Quit()
{
m_QuitRequested = true;
glfwPostEmptyEvent();
}
void PlatformGLFW::UpdatePixelDensity()
{
float xscale, yscale;
glfwGetWindowContentScale(m_Window, &xscale, &yscale);
float scale = xscale > yscale ? xscale : yscale;
# if PLATFORM(WINDOWS)
float windowScale = scale;
float framebufferScale = scale;
# else
float windowScale = 1.0f;
float framebufferScale = scale;
# endif
SetWindowScale(windowScale); // this is how windows is scaled, not window content
SetFramebufferScale(framebufferScale);
}
# endif // BACKEND(IMGUI_GLFW)

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# include "platform.h"
# include "setup.h"
# if BACKEND(IMGUI_WIN32)
# include "application.h"
# include "renderer.h"
# define NOMINMAX
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
# include <tchar.h>
# include <string>
# include <imgui.h>
# include "imgui_impl_win32.h"
# if defined(_UNICODE)
std::wstring Utf8ToNative(const std::string& str)
{
int size = MultiByteToWideChar(CP_UTF8, 0, &str[0], (int)str.size(), nullptr, 0);
std::wstring result(size, 0);
MultiByteToWideChar(CP_UTF8, 0, str.data(), (int)str.size(), (wchar_t*)result.data(), size);
return result;
}
# else
std::string Utf8ToNative(const std::string& str)
{
return str;
}
# endif
IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
struct PlatformWin32 final
: Platform
{
static PlatformWin32* s_Instance;
PlatformWin32(Application& application);
bool ApplicationStart(int argc, char** argv) override;
void ApplicationStop() override;
bool OpenMainWindow(const char* title, int width, int height) override;
bool CloseMainWindow() override;
void* GetMainWindowHandle() const override;
void SetMainWindowTitle(const char* title) override;
void ShowMainWindow() override;
bool ProcessMainWindowEvents() override;
bool IsMainWindowVisible() const override;
void SetRenderer(Renderer* renderer) override;
void NewFrame() override;
void FinishFrame() override;
void Quit() override;
void SetDpiScale(float dpiScale);
LRESULT WinProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
Application& m_Application;
WNDCLASSEX m_WindowClass = {};
HWND m_MainWindowHandle = nullptr;
bool m_IsMinimized = false;
bool m_WasMinimized = false;
bool m_CanCloseResult = false;
Renderer* m_Renderer = nullptr;
};
std::unique_ptr<Platform> CreatePlatform(Application& application)
{
return std::make_unique<PlatformWin32>(application);
}
PlatformWin32* PlatformWin32::s_Instance = nullptr;
PlatformWin32::PlatformWin32(Application& application)
: m_Application(application)
{
}
bool PlatformWin32::ApplicationStart(int argc, char** argv)
{
if (s_Instance)
return false;
s_Instance = this;
auto winProc = [](HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) -> LRESULT
{
return s_Instance->WinProc(hWnd, msg, wParam, lParam);
};
m_WindowClass =
{
sizeof(WNDCLASSEX),
CS_CLASSDC,
winProc,
0L,
0L,
GetModuleHandle(nullptr),
LoadIcon(GetModuleHandle(nullptr),
IDI_APPLICATION),
LoadCursor(nullptr, IDC_ARROW),
nullptr,
nullptr,
_T("imgui-node-editor-application"),
LoadIcon(GetModuleHandle(nullptr),
IDI_APPLICATION)
};
if (!RegisterClassEx(&m_WindowClass))
{
s_Instance = nullptr;
return false;
}
ImGui_ImplWin32_EnableDpiAwareness();
return true;
}
void PlatformWin32::ApplicationStop()
{
if (!s_Instance)
return;
UnregisterClass(m_WindowClass.lpszClassName, m_WindowClass.hInstance);
s_Instance = nullptr;
}
bool PlatformWin32::OpenMainWindow(const char* title, int width, int height)
{
if (m_MainWindowHandle)
return false;
m_MainWindowHandle = CreateWindow(
m_WindowClass.lpszClassName,
Utf8ToNative(title).c_str(),
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
width < 0 ? CW_USEDEFAULT : width,
height < 0 ? CW_USEDEFAULT : height,
nullptr, nullptr, m_WindowClass.hInstance, nullptr);
if (!m_MainWindowHandle)
return false;
if (!ImGui_ImplWin32_Init(m_MainWindowHandle))
{
DestroyWindow(m_MainWindowHandle);
m_MainWindowHandle = nullptr;
return false;
}
SetDpiScale(ImGui_ImplWin32_GetDpiScaleForHwnd(m_MainWindowHandle));
return true;
}
bool PlatformWin32::CloseMainWindow()
{
if (m_MainWindowHandle == nullptr)
return true;
SendMessage(m_MainWindowHandle, WM_CLOSE, 0, 0);
return m_CanCloseResult;
}
void* PlatformWin32::GetMainWindowHandle() const
{
return m_MainWindowHandle;
}
void PlatformWin32::SetMainWindowTitle(const char* title)
{
SetWindowText(m_MainWindowHandle, Utf8ToNative(title).c_str());
}
void PlatformWin32::ShowMainWindow()
{
if (m_MainWindowHandle == nullptr)
return;
//ShowWindow(m_MainWindowHandle, SW_SHOWMAXIMIZED);
ShowWindow(m_MainWindowHandle, SW_SHOW);
UpdateWindow(m_MainWindowHandle);
}
bool PlatformWin32::ProcessMainWindowEvents()
{
if (m_MainWindowHandle == nullptr)
return false;
auto fetchMessage = [this](MSG* msg) -> bool
{
if (!m_IsMinimized)
return PeekMessage(msg, nullptr, 0U, 0U, PM_REMOVE) != 0;
else
return GetMessage(msg, nullptr, 0U, 0U) != 0;
};
MSG msg = {};
while (fetchMessage(&msg))
{
if (msg.message == WM_KEYDOWN && (msg.wParam == VK_ESCAPE))
PostQuitMessage(0);
if (msg.message == WM_QUIT)
return false;
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return true;
}
bool PlatformWin32::IsMainWindowVisible() const
{
if (m_MainWindowHandle == nullptr)
return false;
if (m_IsMinimized)
return false;
return true;
}
void PlatformWin32::SetRenderer(Renderer* renderer)
{
m_Renderer = renderer;
}
void PlatformWin32::NewFrame()
{
ImGui_ImplWin32_NewFrame();
if (m_WasMinimized)
{
ImGui::GetIO().DeltaTime = 0.1e-6f;
m_WasMinimized = false;
}
}
void PlatformWin32::FinishFrame()
{
if (m_Renderer)
m_Renderer->Present();
}
void PlatformWin32::Quit()
{
PostQuitMessage(0);
}
void PlatformWin32::SetDpiScale(float dpiScale)
{
SetWindowScale(dpiScale);
SetFramebufferScale(dpiScale);
}
LRESULT PlatformWin32::WinProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
if (ImGui_ImplWin32_WndProcHandler(hWnd, msg, wParam, lParam))
return 1;
switch (msg)
{
case WM_CLOSE:
m_CanCloseResult = m_Application.CanClose();
if (m_CanCloseResult)
{
ImGui_ImplWin32_Shutdown();
DestroyWindow(hWnd);
}
return 0;
case WM_SIZE:
if (wParam == SIZE_MINIMIZED)
{
m_IsMinimized = true;
m_WasMinimized = true;
}
else if (wParam == SIZE_RESTORED && m_IsMinimized)
{
m_IsMinimized = false;
}
if (m_Renderer != nullptr && wParam != SIZE_MINIMIZED)
m_Renderer->Resize(static_cast<int>(LOWORD(lParam)), static_cast<int>(HIWORD(lParam)));
return 0;
case WM_SYSCOMMAND:
if ((wParam & 0xfff0) == SC_KEYMENU) // Disable ALT application menu
return 0;
break;
case WM_DPICHANGED:
SetDpiScale(ImGui_ImplWin32_GetDpiScaleForHwnd(hWnd));
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hWnd, msg, wParam, lParam);
}
# endif // BACKEND(IMGUI_WIN32)

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# pragma once
# include "setup.h"
# include <memory>
struct Platform;
struct ImDrawData;
struct ImVec4;
using ImTextureID= void*;
struct Renderer
{
virtual ~Renderer() {};
virtual bool Create(Platform& platform) = 0;
virtual void Destroy() = 0;
virtual void NewFrame() = 0;
virtual void RenderDrawData(ImDrawData* drawData) = 0;
virtual void Clear(const ImVec4& color) = 0;
virtual void Present() = 0;
virtual void Resize(int width, int height) = 0;
virtual ImTextureID CreateTexture(const void* data, int width, int height) = 0;
virtual void DestroyTexture(ImTextureID texture) = 0;
virtual int GetTextureWidth(ImTextureID texture) = 0;
virtual int GetTextureHeight(ImTextureID texture) = 0;
};
std::unique_ptr<Renderer> CreateRenderer();

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# include "renderer.h"
# include "setup.h"
# if RENDERER(IMGUI_DX11)
# include "platform.h"
# if PLATFORM(WINDOWS)
# define NOMINMAX
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
# endif
# include <imgui.h>
# include "imgui_impl_dx11.h"
# include <d3d11.h>
struct RendererDX11 final
: Renderer
{
bool Create(Platform& platform) override;
void Destroy() override;
void NewFrame() override;
void RenderDrawData(ImDrawData* drawData) override;
void Clear(const ImVec4& color) override;
void Present() override;
void Resize(int width, int height) override;
ImTextureID CreateTexture(const void* data, int width, int height) override;
void DestroyTexture(ImTextureID texture) override;
int GetTextureWidth(ImTextureID texture) override;
int GetTextureHeight(ImTextureID texture) override;
HRESULT CreateDeviceD3D(HWND hWnd);
void CleanupDeviceD3D();
void CreateRenderTarget();
void CleanupRenderTarget();
Platform* m_Platform = nullptr;
ID3D11Device* m_device = nullptr;
ID3D11DeviceContext* m_deviceContext = nullptr;
IDXGISwapChain* m_swapChain = nullptr;
ID3D11RenderTargetView* m_mainRenderTargetView = nullptr;
};
std::unique_ptr<Renderer> CreateRenderer()
{
return std::make_unique<RendererDX11>();
}
bool RendererDX11::Create(Platform& platform)
{
m_Platform = &platform;
auto hr = CreateDeviceD3D(reinterpret_cast<HWND>(platform.GetMainWindowHandle()));
if (FAILED(hr))
return false;
if (!ImGui_ImplDX11_Init(m_device, m_deviceContext))
{
CleanupDeviceD3D();
return false;
}
m_Platform->SetRenderer(this);
return true;
}
void RendererDX11::Destroy()
{
if (!m_Platform)
return;
m_Platform->SetRenderer(nullptr);
ImGui_ImplDX11_Shutdown();
CleanupDeviceD3D();
}
void RendererDX11::NewFrame()
{
ImGui_ImplDX11_NewFrame();
}
void RendererDX11::RenderDrawData(ImDrawData* drawData)
{
ImGui_ImplDX11_RenderDrawData(drawData);
}
void RendererDX11::Clear(const ImVec4& color)
{
m_deviceContext->ClearRenderTargetView(m_mainRenderTargetView, (float*)&color.x);
}
void RendererDX11::Present()
{
m_swapChain->Present(1, 0);
}
void RendererDX11::Resize(int width, int height)
{
ImGui_ImplDX11_InvalidateDeviceObjects();
CleanupRenderTarget();
m_swapChain->ResizeBuffers(0, (UINT)width, (UINT)height, DXGI_FORMAT_UNKNOWN, 0);
CreateRenderTarget();
}
HRESULT RendererDX11::CreateDeviceD3D(HWND hWnd)
{
// Setup swap chain
DXGI_SWAP_CHAIN_DESC sd;
{
ZeroMemory(&sd, sizeof(sd));
sd.BufferCount = 2;
sd.BufferDesc.Width = 0;
sd.BufferDesc.Height = 0;
sd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
sd.BufferDesc.RefreshRate.Numerator = 60;
sd.BufferDesc.RefreshRate.Denominator = 1;
sd.Flags = DXGI_SWAP_CHAIN_FLAG_ALLOW_MODE_SWITCH;
sd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
sd.OutputWindow = hWnd;
sd.SampleDesc.Count = 1;
sd.SampleDesc.Quality = 0;
sd.Windowed = TRUE;
sd.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;
}
UINT createDeviceFlags = 0;
//createDeviceFlags |= D3D11_CREATE_DEVICE_DEBUG;
D3D_FEATURE_LEVEL featureLevel;
const D3D_FEATURE_LEVEL featureLevelArray[1] = { D3D_FEATURE_LEVEL_11_0, };
if (D3D11CreateDeviceAndSwapChain(nullptr, D3D_DRIVER_TYPE_HARDWARE, nullptr, createDeviceFlags, featureLevelArray, 1, D3D11_SDK_VERSION, &sd, &m_swapChain, &m_device, &featureLevel, &m_deviceContext) != S_OK)
return E_FAIL;
CreateRenderTarget();
return S_OK;
}
void RendererDX11::CleanupDeviceD3D()
{
CleanupRenderTarget();
if (m_swapChain) { m_swapChain->Release(); m_swapChain = nullptr; }
if (m_deviceContext) { m_deviceContext->Release(); m_deviceContext = nullptr; }
if (m_device) { m_device->Release(); m_device = nullptr; }
}
void RendererDX11::CreateRenderTarget()
{
DXGI_SWAP_CHAIN_DESC sd;
m_swapChain->GetDesc(&sd);
// Create the render target
ID3D11Texture2D* pBackBuffer;
D3D11_RENDER_TARGET_VIEW_DESC render_target_view_desc;
ZeroMemory(&render_target_view_desc, sizeof(render_target_view_desc));
render_target_view_desc.Format = sd.BufferDesc.Format;
render_target_view_desc.ViewDimension = D3D11_RTV_DIMENSION_TEXTURE2D;
m_swapChain->GetBuffer(0, __uuidof(ID3D11Texture2D), (LPVOID*)&pBackBuffer);
m_device->CreateRenderTargetView(pBackBuffer, &render_target_view_desc, &m_mainRenderTargetView);
m_deviceContext->OMSetRenderTargets(1, &m_mainRenderTargetView, nullptr);
pBackBuffer->Release();
}
void RendererDX11::CleanupRenderTarget()
{
if (m_mainRenderTargetView) { m_mainRenderTargetView->Release(); m_mainRenderTargetView = nullptr; }
}
ImTextureID RendererDX11::CreateTexture(const void* data, int width, int height)
{
return ImGui_CreateTexture(data, width, height);
}
void RendererDX11::DestroyTexture(ImTextureID texture)
{
return ImGui_DestroyTexture(texture);
}
int RendererDX11::GetTextureWidth(ImTextureID texture)
{
return ImGui_GetTextureWidth(texture);
}
int RendererDX11::GetTextureHeight(ImTextureID texture)
{
return ImGui_GetTextureHeight(texture);
}
# endif // RENDERER(IMGUI_DX11)

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# include "renderer.h"
# if RENDERER(IMGUI_OGL3)
# include "platform.h"
# include <algorithm>
# if PLATFORM(WINDOWS)
# define NOMINMAX
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
# endif
# include "imgui_impl_opengl3.h"
# if defined(IMGUI_IMPL_OPENGL_LOADER_GL3W)
# include <GL/gl3w.h> // Initialize with gl3wInit()
# elif defined(IMGUI_IMPL_OPENGL_LOADER_GLEW)
# include <GL/glew.h> // Initialize with glewInit()
# elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD)
# include <glad/glad.h> // Initialize with gladLoadGL()
# elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD2)
# include <glad/gl.h> // Initialize with gladLoadGL(...) or gladLoaderLoadGL()
# elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2)
# define GLFW_INCLUDE_NONE // GLFW including OpenGL headers causes ambiguity or multiple definition errors.
# include <glbinding/Binding.h> // Initialize with glbinding::Binding::initialize()
# include <glbinding/gl/gl.h>
using namespace gl;
# elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING3)
# define GLFW_INCLUDE_NONE // GLFW including OpenGL headers causes ambiguity or multiple definition errors.
# include <glbinding/glbinding.h>// Initialize with glbinding::initialize()
# include <glbinding/gl/gl.h>
using namespace gl;
# else
# include IMGUI_IMPL_OPENGL_LOADER_CUSTOM
# endif
struct ImTexture
{
GLuint TextureID = 0;
int Width = 0;
int Height = 0;
};
struct RendererOpenGL3 final
: Renderer
{
bool Create(Platform& platform) override;
void Destroy() override;
void NewFrame() override;
void RenderDrawData(ImDrawData* drawData) override;
void Clear(const ImVec4& color) override;
void Present() override;
void Resize(int width, int height) override;
ImVector<ImTexture>::iterator FindTexture(ImTextureID texture);
ImTextureID CreateTexture(const void* data, int width, int height) override;
void DestroyTexture(ImTextureID texture) override;
int GetTextureWidth(ImTextureID texture) override;
int GetTextureHeight(ImTextureID texture) override;
Platform* m_Platform = nullptr;
ImVector<ImTexture> m_Textures;
};
std::unique_ptr<Renderer> CreateRenderer()
{
return std::make_unique<RendererOpenGL3>();
}
bool RendererOpenGL3::Create(Platform& platform)
{
m_Platform = &platform;
// Technically we should initialize OpenGL context here,
// but for now we relay on one created by GLFW3
#if defined(IMGUI_IMPL_OPENGL_LOADER_GL3W)
bool err = gl3wInit() != 0;
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLEW)
bool err = glewInit() != GLEW_OK;
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD)
bool err = gladLoadGL() == 0;
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD2)
bool err = gladLoadGL(glfwGetProcAddress) == 0; // glad2 recommend using the windowing library loader instead of the (optionally) bundled one.
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2)
bool err = false;
glbinding::Binding::initialize();
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING3)
bool err = false;
glbinding::initialize([](const char* name) { return (glbinding::ProcAddress)glfwGetProcAddress(name); });
#else
bool err = false; // If you use IMGUI_IMPL_OPENGL_LOADER_CUSTOM, your loader is likely to requires some form of initialization.
#endif
if (err)
return false;
# if PLATFORM(MACOS)
const char* glslVersion = "#version 150";
# else
const char* glslVersion = "#version 130";
# endif
if (!ImGui_ImplOpenGL3_Init(glslVersion))
return false;
m_Platform->SetRenderer(this);
return true;
}
void RendererOpenGL3::Destroy()
{
if (!m_Platform)
return;
m_Platform->SetRenderer(nullptr);
ImGui_ImplOpenGL3_Shutdown();
}
void RendererOpenGL3::NewFrame()
{
ImGui_ImplOpenGL3_NewFrame();
}
void RendererOpenGL3::RenderDrawData(ImDrawData* drawData)
{
ImGui_ImplOpenGL3_RenderDrawData(drawData);
}
void RendererOpenGL3::Clear(const ImVec4& color)
{
glClearColor(color.x, color.y, color.z, color.w);
glClear(GL_COLOR_BUFFER_BIT);
}
void RendererOpenGL3::Present()
{
}
void RendererOpenGL3::Resize(int width, int height)
{
glViewport(0, 0, width, height);
}
ImTextureID RendererOpenGL3::CreateTexture(const void* data, int width, int height)
{
m_Textures.resize(m_Textures.size() + 1);
ImTexture& texture = m_Textures.back();
// Upload texture to graphics system
GLint last_texture = 0;
glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
glGenTextures(1, &texture.TextureID);
glBindTexture(GL_TEXTURE_2D, texture.TextureID);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
glBindTexture(GL_TEXTURE_2D, last_texture);
texture.Width = width;
texture.Height = height;
return reinterpret_cast<ImTextureID>(static_cast<std::intptr_t>(texture.TextureID));
}
ImVector<ImTexture>::iterator RendererOpenGL3::FindTexture(ImTextureID texture)
{
auto textureID = static_cast<GLuint>(reinterpret_cast<std::intptr_t>(texture));
return std::find_if(m_Textures.begin(), m_Textures.end(), [textureID](ImTexture& texture)
{
return texture.TextureID == textureID;
});
}
void RendererOpenGL3::DestroyTexture(ImTextureID texture)
{
auto textureIt = FindTexture(texture);
if (textureIt == m_Textures.end())
return;
glDeleteTextures(1, &textureIt->TextureID);
m_Textures.erase(textureIt);
}
int RendererOpenGL3::GetTextureWidth(ImTextureID texture)
{
auto textureIt = FindTexture(texture);
if (textureIt != m_Textures.end())
return textureIt->Width;
return 0;
}
int RendererOpenGL3::GetTextureHeight(ImTextureID texture)
{
auto textureIt = FindTexture(texture);
if (textureIt != m_Textures.end())
return textureIt->Height;
return 0;
}
# endif // RENDERER(IMGUI_OGL3)

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# pragma once
# include "config.h"
# define DETAIL_PRIV_EXPAND(x) x
# define EXPAND(x) DETAIL_PRIV_EXPAND(x)
# define DETAIL_PRIV_CONCAT(x, y) x ## y
# define CONCAT(x, y) DETAIL_PRIV_CONCAT(x, y)
// Define PLATFORM(x) which evaluate to 0 or 1 when
// 'x' is: WINDOWS, MACOS or LINUX
# if defined(_WIN32)
# define PLATFORM_PRIV_WINDOWS() 1
# elif defined(__APPLE__)
# define PLATFORM_PRIV_MACOS() 1
# elif defined(__linux__)
# define PLATFORM_PRIV_LINUX() 1
# else
# error Unsupported platform
# endif
# ifndef PLATFORM_PRIV_WINDOWS
# define PLATFORM_PRIV_WINDOWS() 0
# endif
# ifndef PLATFORM_PRIV_MACOS
# define PLATFORM_PRIV_MACOS() 0
# endif
# ifndef PLATFORM_PRIV_LINUX
# define PLATFORM_PRIV_LINUX() 0
# endif
# define PLATFORM(x) (PLATFORM_PRIV_##x())
// Define BACKEND(x) which evaluate to 0 or 1 when
// 'x' is: IMGUI_WIN32 or IMGUI_GLFW
//
// Use BACKEND_CONFIG to override desired backend
//
# if PLATFORM(WINDOWS)
# define BACKEND_HAVE_IMGUI_WIN32() 1
# endif
# if HAVE_GLFW3
# define BACKEND_HAVE_IMGUI_GLFW() 1
# endif
# ifndef BACKEND_HAVE_IMGUI_WIN32
# define BACKEND_HAVE_IMGUI_WIN32() 0
# endif
# ifndef BACKEND_HAVE_IMGUI_GLFW
# define BACKEND_HAVE_IMGUI_GLFW() 0
# endif
# define BACKEND_PRIV_IMGUI_WIN32() 1
# define BACKEND_PRIV_IMGUI_GLFW() 2
# if !defined(BACKEND_CONFIG)
# if PLATFORM(WINDOWS)
# define BACKEND_CONFIG IMGUI_WIN32
# else
# define BACKEND_CONFIG IMGUI_GLFW
# endif
# endif
# define BACKEND(x) ((BACKEND_PRIV_##x()) == CONCAT(BACKEND_PRIV_, EXPAND(BACKEND_CONFIG))() && (BACKEND_HAVE_##x()))
// Define RENDERER(x) which evaluate to 0 or 1 when
// 'x' is: IMGUI_DX11 or IMGUI_OGL3
//
// Use RENDERER_CONFIG to override desired renderer
//
# if PLATFORM(WINDOWS)
# define RENDERER_HAVE_IMGUI_DX11() 1
# endif
# if HAVE_OPENGL
# define RENDERER_HAVE_IMGUI_OGL3() 1
# endif
# ifndef RENDERER_HAVE_IMGUI_DX11
# define RENDERER_HAVE_IMGUI_DX11() 0
# endif
# ifndef RENDERER_HAVE_IMGUI_OGL3
# define RENDERER_HAVE_IMGUI_OGL3() 0
# endif
# define RENDERER_PRIV_IMGUI_DX11() 1
# define RENDERER_PRIV_IMGUI_OGL3() 2
# if !defined(RENDERER_CONFIG)
# if PLATFORM(WINDOWS)
# define RENDERER_CONFIG IMGUI_DX11
# else
# define RENDERER_CONFIG IMGUI_OGL3
# endif
# endif
# define RENDERER(x) ((RENDERER_PRIV_##x()) == CONCAT(RENDERER_PRIV_, EXPAND(RENDERER_CONFIG))() && (RENDERER_HAVE_##x()))

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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleDevelopmentRegion</key>
<string>English</string>
<key>CFBundleExecutable</key>
<string>${MACOSX_BUNDLE_EXECUTABLE_NAME}</string>
<key>CFBundleGetInfoString</key>
<string>${MACOSX_BUNDLE_INFO_STRING}</string>
<key>CFBundleIconFile</key>
<string>${MACOSX_BUNDLE_ICON_FILE}</string>
<key>CFBundleIdentifier</key>
<string>${MACOSX_BUNDLE_GUI_IDENTIFIER}</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundleLongVersionString</key>
<string>${MACOSX_BUNDLE_LONG_VERSION_STRING}</string>
<key>CFBundleName</key>
<string>${MACOSX_BUNDLE_BUNDLE_NAME}</string>
<key>CFBundlePackageType</key>
<string>APPL</string>
<key>CFBundleShortVersionString</key>
<string>${MACOSX_BUNDLE_SHORT_VERSION_STRING}</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleVersion</key>
<string>${MACOSX_BUNDLE_BUNDLE_VERSION}</string>
<key>CSResourcesFileMapped</key>
<true/>
<key>LSRequiresCarbon</key>
<true/>
<key>NSHumanReadableCopyright</key>
<string>${MACOSX_BUNDLE_COPYRIGHT}</string>
<key>NSSupportsAutomaticGraphicsSwitching</key>
<true/>
<key>NSHighResolutionCapable</key>
<true/>
</dict>
</plist>

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#define IDI_APPLICATION 32512
IDI_APPLICATION ICON "${ApplicationIcon}"

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add_example_executable(basic-interaction-example
basic-interaction-example.cpp
)

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3rdparty/imgui-node-editor/examples/basic-interaction-example/basic-interaction-example.cpp vendored Normal file
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# include <imgui.h>
# include <imgui_node_editor.h>
# include <application.h>
namespace ed = ax::NodeEditor;
struct Example:
public Application
{
// Struct to hold basic information about connection between
// pins. Note that connection (aka. link) has its own ID.
// This is useful later with dealing with selections, deletion
// or other operations.
struct LinkInfo
{
ed::LinkId Id;
ed::PinId InputId;
ed::PinId OutputId;
};
using Application::Application;
void OnStart() override
{
ed::Config config;
config.SettingsFile = "BasicInteraction.json";
m_Context = ed::CreateEditor(&config);
}
void OnStop() override
{
ed::DestroyEditor(m_Context);
}
void ImGuiEx_BeginColumn()
{
ImGui::BeginGroup();
}
void ImGuiEx_NextColumn()
{
ImGui::EndGroup();
ImGui::SameLine();
ImGui::BeginGroup();
}
void ImGuiEx_EndColumn()
{
ImGui::EndGroup();
}
void OnFrame(float deltaTime) override
{
auto& io = ImGui::GetIO();
ImGui::Text("FPS: %.2f (%.2gms)", io.Framerate, io.Framerate ? 1000.0f / io.Framerate : 0.0f);
ImGui::Separator();
ed::SetCurrentEditor(m_Context);
// Start interaction with editor.
ed::Begin("My Editor", ImVec2(0.0, 0.0f));
int uniqueId = 1;
//
// 1) Commit known data to editor
//
// Submit Node A
ed::NodeId nodeA_Id = uniqueId++;
ed::PinId nodeA_InputPinId = uniqueId++;
ed::PinId nodeA_OutputPinId = uniqueId++;
if (m_FirstFrame)
ed::SetNodePosition(nodeA_Id, ImVec2(10, 10));
ed::BeginNode(nodeA_Id);
ImGui::Text("Node A");
ed::BeginPin(nodeA_InputPinId, ed::PinKind::Input);
ImGui::Text("-> In");
ed::EndPin();
ImGui::SameLine();
ed::BeginPin(nodeA_OutputPinId, ed::PinKind::Output);
ImGui::Text("Out ->");
ed::EndPin();
ed::EndNode();
// Submit Node B
ed::NodeId nodeB_Id = uniqueId++;
ed::PinId nodeB_InputPinId1 = uniqueId++;
ed::PinId nodeB_InputPinId2 = uniqueId++;
ed::PinId nodeB_OutputPinId = uniqueId++;
if (m_FirstFrame)
ed::SetNodePosition(nodeB_Id, ImVec2(210, 60));
ed::BeginNode(nodeB_Id);
ImGui::Text("Node B");
ImGuiEx_BeginColumn();
ed::BeginPin(nodeB_InputPinId1, ed::PinKind::Input);
ImGui::Text("-> In1");
ed::EndPin();
ed::BeginPin(nodeB_InputPinId2, ed::PinKind::Input);
ImGui::Text("-> In2");
ed::EndPin();
ImGuiEx_NextColumn();
ed::BeginPin(nodeB_OutputPinId, ed::PinKind::Output);
ImGui::Text("Out ->");
ed::EndPin();
ImGuiEx_EndColumn();
ed::EndNode();
// Submit Links
for (auto& linkInfo : m_Links)
ed::Link(linkInfo.Id, linkInfo.InputId, linkInfo.OutputId);
//
// 2) Handle interactions
//
// Handle creation action, returns true if editor want to create new object (node or link)
if (ed::BeginCreate())
{
ed::PinId inputPinId, outputPinId;
if (ed::QueryNewLink(&inputPinId, &outputPinId))
{
// QueryNewLink returns true if editor want to create new link between pins.
//
// Link can be created only for two valid pins, it is up to you to
// validate if connection make sense. Editor is happy to make any.
//
// Link always goes from input to output. User may choose to drag
// link from output pin or input pin. This determine which pin ids
// are valid and which are not:
// * input valid, output invalid - user started to drag new ling from input pin
// * input invalid, output valid - user started to drag new ling from output pin
// * input valid, output valid - user dragged link over other pin, can be validated
if (inputPinId && outputPinId) // both are valid, let's accept link
{
// ed::AcceptNewItem() return true when user release mouse button.
if (ed::AcceptNewItem())
{
// Since we accepted new link, lets add one to our list of links.
m_Links.push_back({ ed::LinkId(m_NextLinkId++), inputPinId, outputPinId });
// Draw new link.
ed::Link(m_Links.back().Id, m_Links.back().InputId, m_Links.back().OutputId);
}
// You may choose to reject connection between these nodes
// by calling ed::RejectNewItem(). This will allow editor to give
// visual feedback by changing link thickness and color.
}
}
}
ed::EndCreate(); // Wraps up object creation action handling.
// Handle deletion action
if (ed::BeginDelete())
{
// There may be many links marked for deletion, let's loop over them.
ed::LinkId deletedLinkId;
while (ed::QueryDeletedLink(&deletedLinkId))
{
// If you agree that link can be deleted, accept deletion.
if (ed::AcceptDeletedItem())
{
// Then remove link from your data.
for (auto& link : m_Links)
{
if (link.Id == deletedLinkId)
{
m_Links.erase(&link);
break;
}
}
}
// You may reject link deletion by calling:
// ed::RejectDeletedItem();
}
}
ed::EndDelete(); // Wrap up deletion action
// End of interaction with editor.
ed::End();
if (m_FirstFrame)
ed::NavigateToContent(0.0f);
ed::SetCurrentEditor(nullptr);
m_FirstFrame = false;
// ImGui::ShowMetricsWindow();
}
ed::EditorContext* m_Context = nullptr; // Editor context, required to trace a editor state.
bool m_FirstFrame = true; // Flag set for first frame only, some action need to be executed once.
ImVector<LinkInfo> m_Links; // List of live links. It is dynamic unless you want to create read-only view over nodes.
int m_NextLinkId = 100; // Counter to help generate link ids. In real application this will probably based on pointer to user data structure.
};
int Main(int argc, char** argv)
{
Example exampe("Basic Interaction", argc, argv);
if (exampe.Create())
return exampe.Run();
return 0;
}

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add_example_executable(blueprints-example
blueprints-example.cpp
utilities/builders.h
utilities/drawing.h
utilities/widgets.h
utilities/builders.cpp
utilities/drawing.cpp
utilities/widgets.cpp
)

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//------------------------------------------------------------------------------
// LICENSE
// This software is dual-licensed to the public domain and under the following
// license: you are granted a perpetual, irrevocable license to copy, modify,
// publish, and distribute this file as you see fit.
//
// CREDITS
// Written by Michal Cichon
//------------------------------------------------------------------------------
# include "builders.h"
# define IMGUI_DEFINE_MATH_OPERATORS
# include <imgui_internal.h>
//------------------------------------------------------------------------------
namespace ed = ax::NodeEditor;
namespace util = ax::NodeEditor::Utilities;
util::BlueprintNodeBuilder::BlueprintNodeBuilder(ImTextureID texture, int textureWidth, int textureHeight):
HeaderTextureId(texture),
HeaderTextureWidth(textureWidth),
HeaderTextureHeight(textureHeight),
CurrentNodeId(0),
CurrentStage(Stage::Invalid),
HasHeader(false)
{
}
void util::BlueprintNodeBuilder::Begin(ed::NodeId id)
{
HasHeader = false;
HeaderMin = HeaderMax = ImVec2();
ed::PushStyleVar(StyleVar_NodePadding, ImVec4(8, 4, 8, 8));
ed::BeginNode(id);
ImGui::PushID(id.AsPointer());
CurrentNodeId = id;
SetStage(Stage::Begin);
}
void util::BlueprintNodeBuilder::End()
{
SetStage(Stage::End);
ed::EndNode();
if (ImGui::IsItemVisible())
{
auto alpha = static_cast<int>(255 * ImGui::GetStyle().Alpha);
auto drawList = ed::GetNodeBackgroundDrawList(CurrentNodeId);
const auto halfBorderWidth = ed::GetStyle().NodeBorderWidth * 0.5f;
auto headerColor = IM_COL32(0, 0, 0, alpha) | (HeaderColor & IM_COL32(255, 255, 255, 0));
if ((HeaderMax.x > HeaderMin.x) && (HeaderMax.y > HeaderMin.y) && HeaderTextureId)
{
const auto uv = ImVec2(
(HeaderMax.x - HeaderMin.x) / (float)(4.0f * HeaderTextureWidth),
(HeaderMax.y - HeaderMin.y) / (float)(4.0f * HeaderTextureHeight));
drawList->AddImageRounded(HeaderTextureId,
HeaderMin - ImVec2(8 - halfBorderWidth, 4 - halfBorderWidth),
HeaderMax + ImVec2(8 - halfBorderWidth, 0),
ImVec2(0.0f, 0.0f), uv,
#if IMGUI_VERSION_NUM > 18101
headerColor, GetStyle().NodeRounding, ImDrawFlags_RoundCornersTop);
#else
headerColor, GetStyle().NodeRounding, 1 | 2);
#endif
auto headerSeparatorMin = ImVec2(HeaderMin.x, HeaderMax.y);
auto headerSeparatorMax = ImVec2(HeaderMax.x, HeaderMin.y);
if ((headerSeparatorMax.x > headerSeparatorMin.x) && (headerSeparatorMax.y > headerSeparatorMin.y))
{
drawList->AddLine(
headerSeparatorMin + ImVec2(-(8 - halfBorderWidth), -0.5f),
headerSeparatorMax + ImVec2( (8 - halfBorderWidth), -0.5f),
ImColor(255, 255, 255, 96 * alpha / (3 * 255)), 1.0f);
}
}
}
CurrentNodeId = 0;
ImGui::PopID();
ed::PopStyleVar();
SetStage(Stage::Invalid);
}
void util::BlueprintNodeBuilder::Header(const ImVec4& color)
{
HeaderColor = ImColor(color);
SetStage(Stage::Header);
}
void util::BlueprintNodeBuilder::EndHeader()
{
SetStage(Stage::Content);
}
void util::BlueprintNodeBuilder::Input(ed::PinId id)
{
if (CurrentStage == Stage::Begin)
SetStage(Stage::Content);
const auto applyPadding = (CurrentStage == Stage::Input);
SetStage(Stage::Input);
if (applyPadding)
ImGui::Spring(0);
Pin(id, PinKind::Input);
ImGui::BeginHorizontal(id.AsPointer());
}
void util::BlueprintNodeBuilder::EndInput()
{
ImGui::EndHorizontal();
EndPin();
}
void util::BlueprintNodeBuilder::Middle()
{
if (CurrentStage == Stage::Begin)
SetStage(Stage::Content);
SetStage(Stage::Middle);
}
void util::BlueprintNodeBuilder::Output(ed::PinId id)
{
if (CurrentStage == Stage::Begin)
SetStage(Stage::Content);
const auto applyPadding = (CurrentStage == Stage::Output);
SetStage(Stage::Output);
if (applyPadding)
ImGui::Spring(0);
Pin(id, PinKind::Output);
ImGui::BeginHorizontal(id.AsPointer());
}
void util::BlueprintNodeBuilder::EndOutput()
{
ImGui::EndHorizontal();
EndPin();
}
bool util::BlueprintNodeBuilder::SetStage(Stage stage)
{
if (stage == CurrentStage)
return false;
auto oldStage = CurrentStage;
CurrentStage = stage;
ImVec2 cursor;
switch (oldStage)
{
case Stage::Begin:
break;
case Stage::Header:
ImGui::EndHorizontal();
HeaderMin = ImGui::GetItemRectMin();
HeaderMax = ImGui::GetItemRectMax();
// spacing between header and content
ImGui::Spring(0, ImGui::GetStyle().ItemSpacing.y * 2.0f);
break;
case Stage::Content:
break;
case Stage::Input:
ed::PopStyleVar(2);
ImGui::Spring(1, 0);
ImGui::EndVertical();
// #debug
// ImGui::GetWindowDrawList()->AddRect(
// ImGui::GetItemRectMin(), ImGui::GetItemRectMax(), IM_COL32(255, 0, 0, 255));
break;
case Stage::Middle:
ImGui::EndVertical();
// #debug
// ImGui::GetWindowDrawList()->AddRect(
// ImGui::GetItemRectMin(), ImGui::GetItemRectMax(), IM_COL32(255, 0, 0, 255));
break;
case Stage::Output:
ed::PopStyleVar(2);
ImGui::Spring(1, 0);
ImGui::EndVertical();
// #debug
// ImGui::GetWindowDrawList()->AddRect(
// ImGui::GetItemRectMin(), ImGui::GetItemRectMax(), IM_COL32(255, 0, 0, 255));
break;
case Stage::End:
break;
case Stage::Invalid:
break;
}
switch (stage)
{
case Stage::Begin:
ImGui::BeginVertical("node");
break;
case Stage::Header:
HasHeader = true;
ImGui::BeginHorizontal("header");
break;
case Stage::Content:
if (oldStage == Stage::Begin)
ImGui::Spring(0);
ImGui::BeginHorizontal("content");
ImGui::Spring(0, 0);
break;
case Stage::Input:
ImGui::BeginVertical("inputs", ImVec2(0, 0), 0.0f);
ed::PushStyleVar(ed::StyleVar_PivotAlignment, ImVec2(0, 0.5f));
ed::PushStyleVar(ed::StyleVar_PivotSize, ImVec2(0, 0));
if (!HasHeader)
ImGui::Spring(1, 0);
break;
case Stage::Middle:
ImGui::Spring(1);
ImGui::BeginVertical("middle", ImVec2(0, 0), 1.0f);
break;
case Stage::Output:
if (oldStage == Stage::Middle || oldStage == Stage::Input)
ImGui::Spring(1);
else
ImGui::Spring(1, 0);
ImGui::BeginVertical("outputs", ImVec2(0, 0), 1.0f);
ed::PushStyleVar(ed::StyleVar_PivotAlignment, ImVec2(1.0f, 0.5f));
ed::PushStyleVar(ed::StyleVar_PivotSize, ImVec2(0, 0));
if (!HasHeader)
ImGui::Spring(1, 0);
break;
case Stage::End:
if (oldStage == Stage::Input)
ImGui::Spring(1, 0);
if (oldStage != Stage::Begin)
ImGui::EndHorizontal();
ContentMin = ImGui::GetItemRectMin();
ContentMax = ImGui::GetItemRectMax();
//ImGui::Spring(0);
ImGui::EndVertical();
NodeMin = ImGui::GetItemRectMin();
NodeMax = ImGui::GetItemRectMax();
break;
case Stage::Invalid:
break;
}
return true;
}
void util::BlueprintNodeBuilder::Pin(ed::PinId id, ed::PinKind kind)
{
ed::BeginPin(id, kind);
}
void util::BlueprintNodeBuilder::EndPin()
{
ed::EndPin();
// #debug
// ImGui::GetWindowDrawList()->AddRectFilled(
// ImGui::GetItemRectMin(), ImGui::GetItemRectMax(), IM_COL32(255, 0, 0, 64));
}

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//------------------------------------------------------------------------------
// LICENSE
// This software is dual-licensed to the public domain and under the following
// license: you are granted a perpetual, irrevocable license to copy, modify,
// publish, and distribute this file as you see fit.
//
// CREDITS
// Written by Michal Cichon
//------------------------------------------------------------------------------
# pragma once
//------------------------------------------------------------------------------
# include <imgui_node_editor.h>
//------------------------------------------------------------------------------
namespace ax {
namespace NodeEditor {
namespace Utilities {
//------------------------------------------------------------------------------
struct BlueprintNodeBuilder
{
BlueprintNodeBuilder(ImTextureID texture = nullptr, int textureWidth = 0, int textureHeight = 0);
void Begin(NodeId id);
void End();
void Header(const ImVec4& color = ImVec4(1, 1, 1, 1));
void EndHeader();
void Input(PinId id);
void EndInput();
void Middle();
void Output(PinId id);
void EndOutput();
private:
enum class Stage
{
Invalid,
Begin,
Header,
Content,
Input,
Output,
Middle,
End
};
bool SetStage(Stage stage);
void Pin(PinId id, ax::NodeEditor::PinKind kind);
void EndPin();
ImTextureID HeaderTextureId;
int HeaderTextureWidth;
int HeaderTextureHeight;
NodeId CurrentNodeId;
Stage CurrentStage;
ImU32 HeaderColor;
ImVec2 NodeMin;
ImVec2 NodeMax;
ImVec2 HeaderMin;
ImVec2 HeaderMax;
ImVec2 ContentMin;
ImVec2 ContentMax;
bool HasHeader;
};
//------------------------------------------------------------------------------
} // namespace Utilities
} // namespace Editor
} // namespace ax

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# include "drawing.h"
# define IMGUI_DEFINE_MATH_OPERATORS
# include <imgui_internal.h>
void ax::Drawing::DrawIcon(ImDrawList* drawList, const ImVec2& a, const ImVec2& b, IconType type, bool filled, ImU32 color, ImU32 innerColor)
{
auto rect = ImRect(a, b);
auto rect_x = rect.Min.x;
auto rect_y = rect.Min.y;
auto rect_w = rect.Max.x - rect.Min.x;
auto rect_h = rect.Max.y - rect.Min.y;
auto rect_center_x = (rect.Min.x + rect.Max.x) * 0.5f;
auto rect_center_y = (rect.Min.y + rect.Max.y) * 0.5f;
auto rect_center = ImVec2(rect_center_x, rect_center_y);
const auto outline_scale = rect_w / 24.0f;
const auto extra_segments = static_cast<int>(2 * outline_scale); // for full circle
if (type == IconType::Flow)
{
const auto origin_scale = rect_w / 24.0f;
const auto offset_x = 1.0f * origin_scale;
const auto offset_y = 0.0f * origin_scale;
const auto margin = (filled ? 2.0f : 2.0f) * origin_scale;
const auto rounding = 0.1f * origin_scale;
const auto tip_round = 0.7f; // percentage of triangle edge (for tip)
//const auto edge_round = 0.7f; // percentage of triangle edge (for corner)
const auto canvas = ImRect(
rect.Min.x + margin + offset_x,
rect.Min.y + margin + offset_y,
rect.Max.x - margin + offset_x,
rect.Max.y - margin + offset_y);
const auto canvas_x = canvas.Min.x;
const auto canvas_y = canvas.Min.y;
const auto canvas_w = canvas.Max.x - canvas.Min.x;
const auto canvas_h = canvas.Max.y - canvas.Min.y;
const auto left = canvas_x + canvas_w * 0.5f * 0.3f;
const auto right = canvas_x + canvas_w - canvas_w * 0.5f * 0.3f;
const auto top = canvas_y + canvas_h * 0.5f * 0.2f;
const auto bottom = canvas_y + canvas_h - canvas_h * 0.5f * 0.2f;
const auto center_y = (top + bottom) * 0.5f;
//const auto angle = AX_PI * 0.5f * 0.5f * 0.5f;
const auto tip_top = ImVec2(canvas_x + canvas_w * 0.5f, top);
const auto tip_right = ImVec2(right, center_y);
const auto tip_bottom = ImVec2(canvas_x + canvas_w * 0.5f, bottom);
drawList->PathLineTo(ImVec2(left, top) + ImVec2(0, rounding));
drawList->PathBezierCubicCurveTo(
ImVec2(left, top),
ImVec2(left, top),
ImVec2(left, top) + ImVec2(rounding, 0));
drawList->PathLineTo(tip_top);
drawList->PathLineTo(tip_top + (tip_right - tip_top) * tip_round);
drawList->PathBezierCubicCurveTo(
tip_right,
tip_right,
tip_bottom + (tip_right - tip_bottom) * tip_round);
drawList->PathLineTo(tip_bottom);
drawList->PathLineTo(ImVec2(left, bottom) + ImVec2(rounding, 0));
drawList->PathBezierCubicCurveTo(
ImVec2(left, bottom),
ImVec2(left, bottom),
ImVec2(left, bottom) - ImVec2(0, rounding));
if (!filled)
{
if (innerColor & 0xFF000000)
drawList->AddConvexPolyFilled(drawList->_Path.Data, drawList->_Path.Size, innerColor);
drawList->PathStroke(color, true, 2.0f * outline_scale);
}
else
drawList->PathFillConvex(color);
}
else
{
auto triangleStart = rect_center_x + 0.32f * rect_w;
auto rect_offset = -static_cast<int>(rect_w * 0.25f * 0.25f);
rect.Min.x += rect_offset;
rect.Max.x += rect_offset;
rect_x += rect_offset;
rect_center_x += rect_offset * 0.5f;
rect_center.x += rect_offset * 0.5f;
if (type == IconType::Circle)
{
const auto c = rect_center;
if (!filled)
{
const auto r = 0.5f * rect_w / 2.0f - 0.5f;
if (innerColor & 0xFF000000)
drawList->AddCircleFilled(c, r, innerColor, 12 + extra_segments);
drawList->AddCircle(c, r, color, 12 + extra_segments, 2.0f * outline_scale);
}
else
{
drawList->AddCircleFilled(c, 0.5f * rect_w / 2.0f, color, 12 + extra_segments);
}
}
if (type == IconType::Square)
{
if (filled)
{
const auto r = 0.5f * rect_w / 2.0f;
const auto p0 = rect_center - ImVec2(r, r);
const auto p1 = rect_center + ImVec2(r, r);
#if IMGUI_VERSION_NUM > 18101
drawList->AddRectFilled(p0, p1, color, 0, ImDrawFlags_RoundCornersAll);
#else
drawList->AddRectFilled(p0, p1, color, 0, 15);
#endif
}
else
{
const auto r = 0.5f * rect_w / 2.0f - 0.5f;
const auto p0 = rect_center - ImVec2(r, r);
const auto p1 = rect_center + ImVec2(r, r);
if (innerColor & 0xFF000000)
{
#if IMGUI_VERSION_NUM > 18101
drawList->AddRectFilled(p0, p1, innerColor, 0, ImDrawFlags_RoundCornersAll);
#else
drawList->AddRectFilled(p0, p1, innerColor, 0, 15);
#endif
}
#if IMGUI_VERSION_NUM > 18101
drawList->AddRect(p0, p1, color, 0, ImDrawFlags_RoundCornersAll, 2.0f * outline_scale);
#else
drawList->AddRect(p0, p1, color, 0, 15, 2.0f * outline_scale);
#endif
}
}
if (type == IconType::Grid)
{
const auto r = 0.5f * rect_w / 2.0f;
const auto w = ceilf(r / 3.0f);
const auto baseTl = ImVec2(floorf(rect_center_x - w * 2.5f), floorf(rect_center_y - w * 2.5f));
const auto baseBr = ImVec2(floorf(baseTl.x + w), floorf(baseTl.y + w));
auto tl = baseTl;
auto br = baseBr;
for (int i = 0; i < 3; ++i)
{
tl.x = baseTl.x;
br.x = baseBr.x;
drawList->AddRectFilled(tl, br, color);
tl.x += w * 2;
br.x += w * 2;
if (i != 1 || filled)
drawList->AddRectFilled(tl, br, color);
tl.x += w * 2;
br.x += w * 2;
drawList->AddRectFilled(tl, br, color);
tl.y += w * 2;
br.y += w * 2;
}
triangleStart = br.x + w + 1.0f / 24.0f * rect_w;
}
if (type == IconType::RoundSquare)
{
if (filled)
{
const auto r = 0.5f * rect_w / 2.0f;
const auto cr = r * 0.5f;
const auto p0 = rect_center - ImVec2(r, r);
const auto p1 = rect_center + ImVec2(r, r);
#if IMGUI_VERSION_NUM > 18101
drawList->AddRectFilled(p0, p1, color, cr, ImDrawFlags_RoundCornersAll);
#else
drawList->AddRectFilled(p0, p1, color, cr, 15);
#endif
}
else
{
const auto r = 0.5f * rect_w / 2.0f - 0.5f;
const auto cr = r * 0.5f;
const auto p0 = rect_center - ImVec2(r, r);
const auto p1 = rect_center + ImVec2(r, r);
if (innerColor & 0xFF000000)
{
#if IMGUI_VERSION_NUM > 18101
drawList->AddRectFilled(p0, p1, innerColor, cr, ImDrawFlags_RoundCornersAll);
#else
drawList->AddRectFilled(p0, p1, innerColor, cr, 15);
#endif
}
#if IMGUI_VERSION_NUM > 18101
drawList->AddRect(p0, p1, color, cr, ImDrawFlags_RoundCornersAll, 2.0f * outline_scale);
#else
drawList->AddRect(p0, p1, color, cr, 15, 2.0f * outline_scale);
#endif
}
}
else if (type == IconType::Diamond)
{
if (filled)
{
const auto r = 0.607f * rect_w / 2.0f;
const auto c = rect_center;
drawList->PathLineTo(c + ImVec2( 0, -r));
drawList->PathLineTo(c + ImVec2( r, 0));
drawList->PathLineTo(c + ImVec2( 0, r));
drawList->PathLineTo(c + ImVec2(-r, 0));
drawList->PathFillConvex(color);
}
else
{
const auto r = 0.607f * rect_w / 2.0f - 0.5f;
const auto c = rect_center;
drawList->PathLineTo(c + ImVec2( 0, -r));
drawList->PathLineTo(c + ImVec2( r, 0));
drawList->PathLineTo(c + ImVec2( 0, r));
drawList->PathLineTo(c + ImVec2(-r, 0));
if (innerColor & 0xFF000000)
drawList->AddConvexPolyFilled(drawList->_Path.Data, drawList->_Path.Size, innerColor);
drawList->PathStroke(color, true, 2.0f * outline_scale);
}
}
else
{
const auto triangleTip = triangleStart + rect_w * (0.45f - 0.32f);
drawList->AddTriangleFilled(
ImVec2(ceilf(triangleTip), rect_y + rect_h * 0.5f),
ImVec2(triangleStart, rect_center_y + 0.15f * rect_h),
ImVec2(triangleStart, rect_center_y - 0.15f * rect_h),
color);
}
}
}

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# pragma once
# include <imgui.h>
namespace ax {
namespace Drawing {
enum class IconType: ImU32 { Flow, Circle, Square, Grid, RoundSquare, Diamond };
void DrawIcon(ImDrawList* drawList, const ImVec2& a, const ImVec2& b, IconType type, bool filled, ImU32 color, ImU32 innerColor);
} // namespace Drawing
} // namespace ax

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# include "widgets.h"
# define IMGUI_DEFINE_MATH_OPERATORS
# include <imgui_internal.h>
void ax::Widgets::Icon(const ImVec2& size, IconType type, bool filled, const ImVec4& color/* = ImVec4(1, 1, 1, 1)*/, const ImVec4& innerColor/* = ImVec4(0, 0, 0, 0)*/)
{
if (ImGui::IsRectVisible(size))
{
auto cursorPos = ImGui::GetCursorScreenPos();
auto drawList = ImGui::GetWindowDrawList();
ax::Drawing::DrawIcon(drawList, cursorPos, cursorPos + size, type, filled, ImColor(color), ImColor(innerColor));
}
ImGui::Dummy(size);
}

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#pragma once
#include <imgui.h>
#include "drawing.h"
namespace ax {
namespace Widgets {
using Drawing::IconType;
void Icon(const ImVec2& size, IconType type, bool filled, const ImVec4& color = ImVec4(1, 1, 1, 1), const ImVec4& innerColor = ImVec4(0, 0, 0, 0));
} // namespace Widgets
} // namespace ax

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add_example_executable(canvas-example
canvas-example.cpp
)
#target_link_libraries(Canvas PRIVATE imgui_canvas)

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# include <imgui.h>
# define IMGUI_DEFINE_MATH_OPERATORS
# include <imgui_internal.h>
# include <imgui_canvas.h>
# include <application.h>
static void DrawScale(const ImVec2& from, const ImVec2& to, float majorUnit, float minorUnit, float labelAlignment, float sign = 1.0f)
{
auto drawList = ImGui::GetWindowDrawList();
auto direction = (to - from) * ImInvLength(to - from, 0.0f);
auto normal = ImVec2(-direction.y, direction.x);
auto distance = sqrtf(ImLengthSqr(to - from));
if (ImDot(direction, direction) < FLT_EPSILON)
return;
auto minorSize = 5.0f;
auto majorSize = 10.0f;
auto labelDistance = 8.0f;
drawList->AddLine(from, to, IM_COL32(255, 255, 255, 255));
auto p = from;
for (auto d = 0.0f; d <= distance; d += minorUnit, p += direction * minorUnit)
drawList->AddLine(p - normal * minorSize, p + normal * minorSize, IM_COL32(255, 255, 255, 255));
for (auto d = 0.0f; d <= distance + majorUnit; d += majorUnit)
{
p = from + direction * d;
drawList->AddLine(p - normal * majorSize, p + normal * majorSize, IM_COL32(255, 255, 255, 255));
if (d == 0.0f)
continue;
char label[16];
snprintf(label, 15, "%g", d * sign);
auto labelSize = ImGui::CalcTextSize(label);
auto labelPosition = p + ImVec2(fabsf(normal.x), fabsf(normal.y)) * labelDistance;
auto labelAlignedSize = ImDot(labelSize, direction);
labelPosition += direction * (-labelAlignedSize + labelAlignment * labelAlignedSize * 2.0f);
labelPosition = ImFloor(labelPosition + ImVec2(0.5f, 0.5f));
drawList->AddText(labelPosition, IM_COL32(255, 255, 255, 255), label);
}
}
static bool Splitter(bool split_vertically, float thickness, float* size1, float* size2, float min_size1, float min_size2, float splitter_long_axis_size = -1.0f)
{
using namespace ImGui;
ImGuiContext& g = *GImGui;
ImGuiWindow* window = g.CurrentWindow;
ImGuiID id = window->GetID("##Splitter");
ImRect bb;
bb.Min = window->DC.CursorPos + (split_vertically ? ImVec2(*size1, 0.0f) : ImVec2(0.0f, *size1));
bb.Max = bb.Min + CalcItemSize(split_vertically ? ImVec2(thickness, splitter_long_axis_size) : ImVec2(splitter_long_axis_size, thickness), 0.0f, 0.0f);
return SplitterBehavior(bb, id, split_vertically ? ImGuiAxis_X : ImGuiAxis_Y, size1, size2, min_size1, min_size2, 0.0f);
}
struct Example:
public Application
{
using Application::Application;
void OnFrame(float deltaTime) override
{
auto& io = ImGui::GetIO();
ImGui::Text("FPS: %.2f (%.2gms)", io.Framerate, io.Framerate ? 1000.0f / io.Framerate : 0.0f);
ImGui::Separator();
auto availableRegion = ImGui::GetContentRegionAvail();
static float s_SplitterSize = 6.0f;
static float s_SplitterArea = 0.0f;
static float s_LeftPaneSize = 0.0f;
static float s_RightPaneSize = 0.0f;
if (s_SplitterArea != availableRegion.x)
{
if (s_SplitterArea == 0.0f)
{
s_SplitterArea = availableRegion.x;
s_LeftPaneSize = ImFloor(availableRegion.x * 0.25f);
s_RightPaneSize = availableRegion.x - s_LeftPaneSize - s_SplitterSize;
}
else
{
auto ratio = availableRegion.x / s_SplitterArea;
s_SplitterArea = availableRegion.x;
s_LeftPaneSize = s_LeftPaneSize * ratio;
s_RightPaneSize = availableRegion.x - s_LeftPaneSize - s_SplitterSize;
}
}
static ImGuiEx::Canvas canvas;
static ImVec2 drawStartPoint;
static bool isDragging = false;
static ImRect panelRect;
Splitter(true, s_SplitterSize, &s_LeftPaneSize, &s_RightPaneSize, 100.0f, 100.0f);
auto canvasRect = canvas.Rect();
auto viewRect = canvas.ViewRect();
auto viewOrigin = canvas.ViewOrigin();
auto viewScale = canvas.ViewScale();
ImGui::BeginChild("##top", ImVec2(s_LeftPaneSize, -1), false, ImGuiWindowFlags_NoScrollWithMouse);
ImGui::TextUnformatted("Rect:");
ImGui::BeginColumns("rect", 2, ImGuiOldColumnFlags_NoBorder);
ImGui::SetColumnWidth(0, ImGui::CalcTextSize("\t\tL: 0000.00\t").x);
ImGui::Text("\tL: %.2f", canvasRect.Min.x); ImGui::NextColumn();
ImGui::Text("\tT: %.2f", canvasRect.Min.y); ImGui::NextColumn();
ImGui::Text("\tR: %.2f", canvasRect.Max.x); ImGui::NextColumn();
ImGui::Text("\tB: %.2f", canvasRect.Max.y); ImGui::NextColumn();
ImGui::Text("\tW: %.2f", canvasRect.GetWidth()); ImGui::NextColumn();
ImGui::Text("\tH: %.2f", canvasRect.GetHeight()); ImGui::NextColumn();
ImGui::EndColumns();
ImGui::TextUnformatted("View Rect:");
ImGui::BeginColumns("viewrect", 2, ImGuiOldColumnFlags_NoBorder);
ImGui::SetColumnWidth(0, ImGui::CalcTextSize("\t\tL: 0000.00\t").x);
ImGui::Text("\tL: %.2f", viewRect.Min.x); ImGui::NextColumn();
ImGui::Text("\tT: %.2f", viewRect.Min.y); ImGui::NextColumn();
ImGui::Text("\tR: %.2f", viewRect.Max.x); ImGui::NextColumn();
ImGui::Text("\tB: %.2f", viewRect.Max.y); ImGui::NextColumn();
ImGui::Text("\tW: %.2f", viewRect.GetWidth()); ImGui::NextColumn();
ImGui::Text("\tH: %.2f", viewRect.GetHeight()); ImGui::NextColumn();
ImGui::EndColumns();
ImGui::TextUnformatted("Origin:");
ImGui::Indent();
auto originChanged = false;
ImGui::PushItemWidth(-ImGui::GetStyle().IndentSpacing);
originChanged |= ImGui::DragFloat("##originx", &viewOrigin.x, 1.0f);
originChanged |= ImGui::DragFloat("##originy", &viewOrigin.y, 1.0f);
if (originChanged) canvas.SetView(viewOrigin, viewScale);
ImGui::PopItemWidth();
ImGui::Unindent();
ImGui::TextUnformatted("Scale:");
ImGui::Indent();
ImGui::PushItemWidth(-ImGui::GetStyle().IndentSpacing);
if (ImGui::DragFloat("##scale", &viewScale, 0.01f, 0.01f, 15.0f))
canvas.SetView(viewOrigin, viewScale);
ImGui::PopItemWidth();
ImGui::Unindent();
ImGui::Separator();
if (ImGui::Button("Center over Panel", ImVec2(s_LeftPaneSize, 0)))
canvas.CenterView(panelRect.GetCenter());
if (ImGui::Button("Center and zoom to Panel", ImVec2(s_LeftPaneSize, 0)))
canvas.CenterView(panelRect);
ImGui::TextUnformatted("Panel Rect:");
ImGui::BeginColumns("panelrect", 2, ImGuiOldColumnFlags_NoBorder);
ImGui::SetColumnWidth(0, ImGui::CalcTextSize("\t\tL: 0000.00\t").x);
ImGui::Text("\tL: %.2f", panelRect.Min.x); ImGui::NextColumn();
ImGui::Text("\tT: %.2f", panelRect.Min.y); ImGui::NextColumn();
ImGui::Text("\tR: %.2f", panelRect.Max.x); ImGui::NextColumn();
ImGui::Text("\tB: %.2f", panelRect.Max.y); ImGui::NextColumn();
ImGui::Text("\tW: %.2f", panelRect.GetWidth()); ImGui::NextColumn();
ImGui::Text("\tH: %.2f", panelRect.GetHeight()); ImGui::NextColumn();
ImGui::EndColumns();
ImGui::EndChild();
ImGui::SameLine(0.0f, s_SplitterSize);
if (canvas.Begin("##mycanvas", ImVec2(s_RightPaneSize, 0.0f)))
{
//auto drawList = ImGui::GetWindowDrawList();
if ((isDragging || ImGui::IsItemHovered()) && ImGui::IsMouseDragging(1, 0.0f))
{
if (!isDragging)
{
isDragging = true;
drawStartPoint = viewOrigin;
}
canvas.SetView(drawStartPoint + ImGui::GetMouseDragDelta(1, 0.0f) * viewScale, viewScale);
}
else if (isDragging)
isDragging = false;
viewRect = canvas.ViewRect();
if (viewRect.Max.x > 0.0f)
DrawScale(ImVec2(0.0f, 0.0f), ImVec2(viewRect.Max.x, 0.0f), 100.0f, 10.0f, 0.6f);
if (viewRect.Min.x < 0.0f)
DrawScale(ImVec2(0.0f, 0.0f), ImVec2(viewRect.Min.x, 0.0f), 100.0f, 10.0f, 0.6f, -1.0f);
if (viewRect.Max.y > 0.0f)
DrawScale(ImVec2(0.0f, 0.0f), ImVec2(0.0f, viewRect.Max.y), 100.0f, 10.0f, 0.6f);
if (viewRect.Min.y < 0.0f)
DrawScale(ImVec2(0.0f, 0.0f), ImVec2(0.0f, viewRect.Min.y), 100.0f, 10.0f, 0.6f, -1.0f);
ImGui::Text("Hovered: %d", ImGui::IsItemHovered() ? 1 : 0);
ImGui::TextUnformatted("Hello World!");
ImGui::Bullet();
ImGui::Button("Panel", ImVec2(s_RightPaneSize * 0.75f, availableRegion.y * 0.5f) * 0.5f);
panelRect.Min = ImGui::GetItemRectMin();
panelRect.Max = ImGui::GetItemRectMax();
canvas.End();
}
//ed::SetCurrentEditor(g_Context);
//ed::Begin("My Editor", ImVec2(0.0, 0.0f));
//int uniqueId = 1;
//// Start drawing nodes.
//ed::BeginNode(uniqueId++);
// ImGui::Text("Node A");
// ed::BeginPin(uniqueId++, ed::PinKind::Input);
// ImGui::Text("-> In");
// ed::EndPin();
// ImGui::SameLine();
// ed::BeginPin(uniqueId++, ed::PinKind::Output);
// ImGui::Text("Out ->");
// ed::EndPin();
//ed::EndNode();
//ed::End();
//ed::SetCurrentEditor(nullptr);
//ImGui::ShowMetricsWindow();
}
};
int Main(int argc, char** argv)
{
Example exampe("Canvas", argc, argv);
if (exampe.Create())
return exampe.Run();
return 0;
}

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Copyright 2010 The Cuprum Project Authors (lemonad@jovanny.ru), with Reserved Font Name "Cuprum".
This Font Software is licensed under the SIL Open Font License, Version 1.1.
This license is copied below, and is also available with a FAQ at:
http://scripts.sil.org/OFL
-----------------------------------------------------------
SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
-----------------------------------------------------------
PREAMBLE
The goals of the Open Font License (OFL) are to stimulate worldwide
development of collaborative font projects, to support the font creation
efforts of academic and linguistic communities, and to provide a free and
open framework in which fonts may be shared and improved in partnership
with others.
The OFL allows the licensed fonts to be used, studied, modified and
redistributed freely as long as they are not sold by themselves. The
fonts, including any derivative works, can be bundled, embedded,
redistributed and/or sold with any software provided that any reserved
names are not used by derivative works. The fonts and derivatives,
however, cannot be released under any other type of license. The
requirement for fonts to remain under this license does not apply
to any document created using the fonts or their derivatives.
DEFINITIONS
"Font Software" refers to the set of files released by the Copyright
Holder(s) under this license and clearly marked as such. This may
include source files, build scripts and documentation.
"Reserved Font Name" refers to any names specified as such after the
copyright statement(s).
"Original Version" refers to the collection of Font Software components as
distributed by the Copyright Holder(s).
"Modified Version" refers to any derivative made by adding to, deleting,
or substituting -- in part or in whole -- any of the components of the
Original Version, by changing formats or by porting the Font Software to a
new environment.
"Author" refers to any designer, engineer, programmer, technical
writer or other person who contributed to the Font Software.
PERMISSION & CONDITIONS
Permission is hereby granted, free of charge, to any person obtaining
a copy of the Font Software, to use, study, copy, merge, embed, modify,
redistribute, and sell modified and unmodified copies of the Font
Software, subject to the following conditions:
1) Neither the Font Software nor any of its individual components,
in Original or Modified Versions, may be sold by itself.
2) Original or Modified Versions of the Font Software may be bundled,
redistributed and/or sold with any software, provided that each copy
contains the above copyright notice and this license. These can be
included either as stand-alone text files, human-readable headers or
in the appropriate machine-readable metadata fields within text or
binary files as long as those fields can be easily viewed by the user.
3) No Modified Version of the Font Software may use the Reserved Font
Name(s) unless explicit written permission is granted by the corresponding
Copyright Holder. This restriction only applies to the primary font name as
presented to the users.
4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
Software shall not be used to promote, endorse or advertise any
Modified Version, except to acknowledge the contribution(s) of the
Copyright Holder(s) and the Author(s) or with their explicit written
permission.
5) The Font Software, modified or unmodified, in part or in whole,
must be distributed entirely under this license, and must not be
distributed under any other license. The requirement for fonts to
remain under this license does not apply to any document created
using the Font Software.
TERMINATION
This license becomes null and void if any of the above conditions are
not met.
DISCLAIMER
THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
OTHER DEALINGS IN THE FONT SOFTWARE.

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Copyright 2016 The Oswald Project Authors (https://github.com/googlefonts/OswaldFont)
This Font Software is licensed under the SIL Open Font License, Version 1.1.
This license is copied below, and is also available with a FAQ at:
http://scripts.sil.org/OFL
-----------------------------------------------------------
SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
-----------------------------------------------------------
PREAMBLE
The goals of the Open Font License (OFL) are to stimulate worldwide
development of collaborative font projects, to support the font creation
efforts of academic and linguistic communities, and to provide a free and
open framework in which fonts may be shared and improved in partnership
with others.
The OFL allows the licensed fonts to be used, studied, modified and
redistributed freely as long as they are not sold by themselves. The
fonts, including any derivative works, can be bundled, embedded,
redistributed and/or sold with any software provided that any reserved
names are not used by derivative works. The fonts and derivatives,
however, cannot be released under any other type of license. The
requirement for fonts to remain under this license does not apply
to any document created using the fonts or their derivatives.
DEFINITIONS
"Font Software" refers to the set of files released by the Copyright
Holder(s) under this license and clearly marked as such. This may
include source files, build scripts and documentation.
"Reserved Font Name" refers to any names specified as such after the
copyright statement(s).
"Original Version" refers to the collection of Font Software components as
distributed by the Copyright Holder(s).
"Modified Version" refers to any derivative made by adding to, deleting,
or substituting -- in part or in whole -- any of the components of the
Original Version, by changing formats or by porting the Font Software to a
new environment.
"Author" refers to any designer, engineer, programmer, technical
writer or other person who contributed to the Font Software.
PERMISSION & CONDITIONS
Permission is hereby granted, free of charge, to any person obtaining
a copy of the Font Software, to use, study, copy, merge, embed, modify,
redistribute, and sell modified and unmodified copies of the Font
Software, subject to the following conditions:
1) Neither the Font Software nor any of its individual components,
in Original or Modified Versions, may be sold by itself.
2) Original or Modified Versions of the Font Software may be bundled,
redistributed and/or sold with any software, provided that each copy
contains the above copyright notice and this license. These can be
included either as stand-alone text files, human-readable headers or
in the appropriate machine-readable metadata fields within text or
binary files as long as those fields can be easily viewed by the user.
3) No Modified Version of the Font Software may use the Reserved Font
Name(s) unless explicit written permission is granted by the corresponding
Copyright Holder. This restriction only applies to the primary font name as
presented to the users.
4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
Software shall not be used to promote, endorse or advertise any
Modified Version, except to acknowledge the contribution(s) of the
Copyright Holder(s) and the Author(s) or with their explicit written
permission.
5) The Font Software, modified or unmodified, in part or in whole,
must be distributed entirely under this license, and must not be
distributed under any other license. The requirement for fonts to
remain under this license does not apply to any document created
using the Font Software.
TERMINATION
This license becomes null and void if any of the above conditions are
not met.
DISCLAIMER
THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
OTHER DEALINGS IN THE FONT SOFTWARE.

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Copyright (c) 2011, Jonas Hecksher, Playtypes, e-types AS (lasse@e-types.com), with Reserved Font Name 'Play', 'Playtype', 'Playtype Sans'.
This Font Software is licensed under the SIL Open Font License, Version 1.1.
This license is copied below, and is also available with a FAQ at:
http://scripts.sil.org/OFL
-----------------------------------------------------------
SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
-----------------------------------------------------------
PREAMBLE
The goals of the Open Font License (OFL) are to stimulate worldwide
development of collaborative font projects, to support the font creation
efforts of academic and linguistic communities, and to provide a free and
open framework in which fonts may be shared and improved in partnership
with others.
The OFL allows the licensed fonts to be used, studied, modified and
redistributed freely as long as they are not sold by themselves. The
fonts, including any derivative works, can be bundled, embedded,
redistributed and/or sold with any software provided that any reserved
names are not used by derivative works. The fonts and derivatives,
however, cannot be released under any other type of license. The
requirement for fonts to remain under this license does not apply
to any document created using the fonts or their derivatives.
DEFINITIONS
"Font Software" refers to the set of files released by the Copyright
Holder(s) under this license and clearly marked as such. This may
include source files, build scripts and documentation.
"Reserved Font Name" refers to any names specified as such after the
copyright statement(s).
"Original Version" refers to the collection of Font Software components as
distributed by the Copyright Holder(s).
"Modified Version" refers to any derivative made by adding to, deleting,
or substituting -- in part or in whole -- any of the components of the
Original Version, by changing formats or by porting the Font Software to a
new environment.
"Author" refers to any designer, engineer, programmer, technical
writer or other person who contributed to the Font Software.
PERMISSION & CONDITIONS
Permission is hereby granted, free of charge, to any person obtaining
a copy of the Font Software, to use, study, copy, merge, embed, modify,
redistribute, and sell modified and unmodified copies of the Font
Software, subject to the following conditions:
1) Neither the Font Software nor any of its individual components,
in Original or Modified Versions, may be sold by itself.
2) Original or Modified Versions of the Font Software may be bundled,
redistributed and/or sold with any software, provided that each copy
contains the above copyright notice and this license. These can be
included either as stand-alone text files, human-readable headers or
in the appropriate machine-readable metadata fields within text or
binary files as long as those fields can be easily viewed by the user.
3) No Modified Version of the Font Software may use the Reserved Font
Name(s) unless explicit written permission is granted by the corresponding
Copyright Holder. This restriction only applies to the primary font name as
presented to the users.
4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
Software shall not be used to promote, endorse or advertise any
Modified Version, except to acknowledge the contribution(s) of the
Copyright Holder(s) and the Author(s) or with their explicit written
permission.
5) The Font Software, modified or unmodified, in part or in whole,
must be distributed entirely under this license, and must not be
distributed under any other license. The requirement for fonts to
remain under this license does not apply to any document created
using the Font Software.
TERMINATION
This license becomes null and void if any of the above conditions are
not met.
DISCLAIMER
THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
OTHER DEALINGS IN THE FONT SOFTWARE.

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add_example_executable(simple-example
simple-example.cpp
)

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# include <imgui.h>
# include <imgui_node_editor.h>
# include <application.h>
namespace ed = ax::NodeEditor;
struct Example:
public Application
{
using Application::Application;
void OnStart() override
{
ed::Config config;
config.SettingsFile = "Simple.json";
m_Context = ed::CreateEditor(&config);
}
void OnStop() override
{
ed::DestroyEditor(m_Context);
}
void OnFrame(float deltaTime) override
{
auto& io = ImGui::GetIO();
ImGui::Text("FPS: %.2f (%.2gms)", io.Framerate, io.Framerate ? 1000.0f / io.Framerate : 0.0f);
ImGui::Separator();
ed::SetCurrentEditor(m_Context);
ed::Begin("My Editor", ImVec2(0.0, 0.0f));
int uniqueId = 1;
// Start drawing nodes.
ed::BeginNode(uniqueId++);
ImGui::Text("Node A");
ed::BeginPin(uniqueId++, ed::PinKind::Input);
ImGui::Text("-> In");
ed::EndPin();
ImGui::SameLine();
ed::BeginPin(uniqueId++, ed::PinKind::Output);
ImGui::Text("Out ->");
ed::EndPin();
ed::EndNode();
ed::End();
ed::SetCurrentEditor(nullptr);
//ImGui::ShowMetricsWindow();
}
ed::EditorContext* m_Context = nullptr;
};
int Main(int argc, char** argv)
{
Example exampe("Simple", argc, argv);
if (exampe.Create())
return exampe.Run();
return 0;
}

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add_example_executable(widgets-example
widgets-example.cpp
)

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// ===================================================================================================================
// Widget Example
// Drawing standard ImGui widgets inside the node body
//
// First, some unsorted notes about which widgets do and don't draw well inside nodes. Run the examples to see all the allowed widgets.
//
// - Child windows with scrolling doesn't work in the node. The child window appears in a normal node,
// and scrolls, but its contents are floating around in the wrong location, and they are not scaled.
// Note that you can put scrolling child windows into "deferred popups" (see next item).
// - Listboxes and combo-boxes only work in nodes with a work-around: deferring the popup calls until after the node drawing is
// completed. Look to the popup-demo for an example.
// - Headers and trees work inside the nodes only with hacks. This is because they attempt to span the "avaialbe width"
// and the nodes can't tell these widgets how wide it is. The work-around is to set up a fake
// table with a static column width, then draw your header and tree widgets in that column.
// - Clickable tabs don't work in nodes. Tabs appear, but you cannot actually change the tab, so they're functionally useless.
// - Editable text areas work, but you have to manually manage disabling the editor shorcuts while typing is detected.
// Look around for the call to ed::EnableShortcuts() for an example.
// - Most of the cool graph widgets can't be used because they are hard-coded in ImGui to spawn tooltips, which don't work.
# include <imgui.h>
# include <imgui_internal.h>
# include <imgui_node_editor.h>
# include <application.h>
namespace ed = ax::NodeEditor;
# ifdef _MSC_VER
# define portable_strcpy strcpy_s
# define portable_sprintf sprintf_s
# else
# define portable_strcpy strcpy
# define portable_sprintf sprintf
# endif
struct Example:
public Application
{
using Application::Application;
struct LinkInfo
{
ed::LinkId Id;
ed::PinId InputId;
ed::PinId OutputId;
};
void OnStart() override
{
ed::Config config;
config.SettingsFile = "Widgets.json";
m_Context = ed::CreateEditor(&config);
}
void OnStop() override
{
ed::DestroyEditor(m_Context);
}
void OnFrame(float deltaTime) override
{
static bool firstframe = true; // Used to position the nodes on startup
auto& io = ImGui::GetIO();
// FPS Counter Ribbon
ImGui::Text("FPS: %.2f (%.2gms)", io.Framerate, io.Framerate ? 1000.0f / io.Framerate : 0.0f);
ImGui::Separator();
// Node Editor Widget
ed::SetCurrentEditor(m_Context);
ed::Begin("My Editor", ImVec2(0.0, 0.0f));
int uniqueId = 1;
// Basic Widgets Demo ==============================================================================================
auto basic_id = uniqueId++;
ed::BeginNode(basic_id);
ImGui::Text("Basic Widget Demo");
ed::BeginPin(uniqueId++, ed::PinKind::Input);
ImGui::Text("-> In");
ed::EndPin();
ImGui::SameLine();
ImGui::Dummy(ImVec2(250, 0)); // Hacky magic number to space out the output pin.
ImGui::SameLine();
ed::BeginPin(uniqueId++, ed::PinKind::Output);
ImGui::Text("Out ->");
ed::EndPin();
// Widget Demo from imgui_demo.cpp...
// Normal Button
static int clicked = 0;
if (ImGui::Button("Button"))
clicked++;
if (clicked & 1)
{
ImGui::SameLine();
ImGui::Text("Thanks for clicking me!");
}
// Checkbox
static bool check = true;
ImGui::Checkbox("checkbox", &check);
// Radio buttons
static int e = 0;
ImGui::RadioButton("radio a", &e, 0); ImGui::SameLine();
ImGui::RadioButton("radio b", &e, 1); ImGui::SameLine();
ImGui::RadioButton("radio c", &e, 2);
// Color buttons, demonstrate using PushID() to add unique identifier in the ID stack, and changing style.
for (int i = 0; i < 7; i++)
{
if (i > 0)
ImGui::SameLine();
ImGui::PushID(i);
ImGui::PushStyleColor(ImGuiCol_Button, (ImVec4)ImColor::HSV(i / 7.0f, 0.6f, 0.6f));
ImGui::PushStyleColor(ImGuiCol_ButtonHovered, (ImVec4)ImColor::HSV(i / 7.0f, 0.7f, 0.7f));
ImGui::PushStyleColor(ImGuiCol_ButtonActive, (ImVec4)ImColor::HSV(i / 7.0f, 0.8f, 0.8f));
ImGui::Button("Click");
ImGui::PopStyleColor(3);
ImGui::PopID();
}
// Use AlignTextToFramePadding() to align text baseline to the baseline of framed elements (otherwise a Text+SameLine+Button sequence will have the text a little too high by default)
ImGui::AlignTextToFramePadding();
ImGui::Text("Hold to repeat:");
ImGui::SameLine();
// Arrow buttons with Repeater
static int counter = 0;
float spacing = ImGui::GetStyle().ItemInnerSpacing.x;
ImGui::PushButtonRepeat(true);
if (ImGui::ArrowButton("##left", ImGuiDir_Left)) { counter--; }
ImGui::SameLine(0.0f, spacing);
if (ImGui::ArrowButton("##right", ImGuiDir_Right)) { counter++; }
ImGui::PopButtonRepeat();
ImGui::SameLine();
ImGui::Text("%d", counter);
// The input widgets also require you to manually disable the editor shortcuts so the view doesn't fly around.
// (note that this is a per-frame setting, so it disables it for all text boxes. I left it here so you could find it!)
ed::EnableShortcuts(!io.WantTextInput);
// The input widgets require some guidance on their widths, or else they're very large. (note matching pop at the end).
ImGui::PushItemWidth(200);
static char str1[128] = "";
ImGui::InputTextWithHint("input text (w/ hint)", "enter text here", str1, IM_ARRAYSIZE(str1));
static float f0 = 0.001f;
ImGui::InputFloat("input float", &f0, 0.01f, 1.0f, "%.3f");
static float f1 = 1.00f, f2 = 0.0067f;
ImGui::DragFloat("drag float", &f1, 0.005f);
ImGui::DragFloat("drag small float", &f2, 0.0001f, 0.0f, 0.0f, "%.06f ns");
ImGui::PopItemWidth();
ed::EndNode();
if (firstframe)
{
ed::SetNodePosition(basic_id, ImVec2(20, 20));
}
// Headers and Trees Demo =======================================================================================================
// TreeNodes and Headers streatch to the entire remaining work area. To put them in nodes what we need to do is to tell
// ImGui out work area is shorter. We can achieve that right now only by using columns API.
//
// Relevent bugs: https://github.com/thedmd/imgui-node-editor/issues/30
auto header_id = uniqueId++;
ed::BeginNode(header_id);
ImGui::Text("Tree Widget Demo");
// Pins Row
ed::BeginPin(uniqueId++, ed::PinKind::Input);
ImGui::Text("-> In");
ed::EndPin();
ImGui::SameLine();
ImGui::Dummy(ImVec2(35, 0)); // magic number - Crude & simple way to nudge over the output pin. Consider using layout and springs
ImGui::SameLine();
ed::BeginPin(uniqueId++, ed::PinKind::Output);
ImGui::Text("Out ->");
ed::EndPin();
// Tree column startup -------------------------------------------------------------------
// Push dummy widget to extend node size. Columns do not do that.
float width = 135; // bad magic numbers. used to define width of tree widget
ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(0.0f, 0.0f));
ImGui::Dummy(ImVec2(width, 0));
ImGui::PopStyleVar();
// Start columns, but use only first one.
ImGui::BeginColumns("##TreeColumns", 2,
ImGuiOldColumnFlags_NoBorder |
ImGuiOldColumnFlags_NoResize |
ImGuiOldColumnFlags_NoPreserveWidths |
ImGuiOldColumnFlags_NoForceWithinWindow);
// Adjust column width to match requested one.
ImGui::SetColumnWidth(0, width
+ ImGui::GetStyle().WindowPadding.x
+ ImGui::GetStyle().ItemSpacing.x);
// End of tree column startup --------------------------------------------------------------
// Back to normal ImGui drawing, in our column.
if (ImGui::CollapsingHeader("Open Header"))
{
ImGui::Text("Hello There");
if (ImGui::TreeNode("Open Tree")) {
static bool OP1_Bool = false;
ImGui::Text("Checked: %s", OP1_Bool ? "true" : "false");
ImGui::Checkbox("Option 1", &OP1_Bool);
ImGui::TreePop();
}
}
// Tree Column Shutdown
ImGui::EndColumns();
ed::EndNode(); // End of Tree Node Demo
if (firstframe)
{
ed::SetNodePosition(header_id, ImVec2(420, 20));
}
// Tool Tip & Pop-up Demo =====================================================================================
// Tooltips, combo-boxes, drop-down menus need to use a work-around to place the "overlay window" in the canvas.
// To do this, we must defer the popup calls until after we're done drawing the node material.
//
// Relevent bugs: https://github.com/thedmd/imgui-node-editor/issues/48
auto popup_id = uniqueId++;
ed::BeginNode(popup_id);
ImGui::Text("Tool Tip & Pop-up Demo");
ed::BeginPin(uniqueId++, ed::PinKind::Input);
ImGui::Text("-> In");
ed::EndPin();
ImGui::SameLine();
ImGui::Dummy(ImVec2(85, 0)); // Hacky magic number to space out the output pin.
ImGui::SameLine();
ed::BeginPin(uniqueId++, ed::PinKind::Output);
ImGui::Text("Out ->");
ed::EndPin();
// Tooltip example
ImGui::Text("Hover over me");
static bool do_tooltip = false;
do_tooltip = ImGui::IsItemHovered() ? true : false;
ImGui::SameLine();
ImGui::Text("- or me");
static bool do_adv_tooltip = false;
do_adv_tooltip = ImGui::IsItemHovered() ? true : false;
// Use AlignTextToFramePadding() to align text baseline to the baseline of framed elements
// (otherwise a Text+SameLine+Button sequence will have the text a little too high by default)
ImGui::AlignTextToFramePadding();
ImGui::Text("Option:");
ImGui::SameLine();
static char popup_text[128] = "Pick one!";
static bool do_popup = false;
if (ImGui::Button(popup_text)) {
do_popup = true; // Instead of saying OpenPopup() here, we set this bool, which is used later in the Deferred Pop-up Section
}
ed::EndNode();
if (firstframe) {
ed::SetNodePosition(popup_id, ImVec2(610, 20));
}
// --------------------------------------------------------------------------------------------------
// Deferred Pop-up Section
// This entire section needs to be bounded by Suspend/Resume! These calls pop us out of "node canvas coordinates"
// and draw the popups in a reasonable screen location.
ed::Suspend();
// There is some stately stuff happening here. You call "open popup" exactly once, and this
// causes it to stick open for many frames until the user makes a selection in the popup, or clicks off to dismiss.
// More importantly, this is done inside Suspend(), so it loads the popup with the correct screen coordinates!
if (do_popup) {
ImGui::OpenPopup("popup_button"); // Cause openpopup to stick open.
do_popup = false; // disable bool so that if we click off the popup, it doesn't open the next frame.
}
// This is the actual popup Gui drawing section.
if (ImGui::BeginPopup("popup_button")) {
// Note: if it weren't for the child window, we would have to PushItemWidth() here to avoid a crash!
ImGui::TextDisabled("Pick One:");
ImGui::BeginChild("popup_scroller", ImVec2(100, 100), true, ImGuiWindowFlags_AlwaysVerticalScrollbar);
if (ImGui::Button("Option 1")) {
portable_strcpy(popup_text, "Option 1");
ImGui::CloseCurrentPopup(); // These calls revoke the popup open state, which was set by OpenPopup above.
}
if (ImGui::Button("Option 2")) {
portable_strcpy(popup_text, "Option 2");
ImGui::CloseCurrentPopup();
}
if (ImGui::Button("Option 3")) {
portable_strcpy(popup_text, "Option 3");
ImGui::CloseCurrentPopup();
}
if (ImGui::Button("Option 4")) {
portable_strcpy(popup_text, "Option 4");
ImGui::CloseCurrentPopup();
}
ImGui::EndChild();
ImGui::EndPopup(); // Note this does not do anything to the popup open/close state. It just terminates the content declaration.
}
// Handle the simple tooltip
if (do_tooltip)
ImGui::SetTooltip("I am a tooltip");
// Handle the advanced tooltip
if (do_adv_tooltip) {
ImGui::BeginTooltip();
ImGui::Text("I am a fancy tooltip");
static float arr[] = { 0.6f, 0.1f, 1.0f, 0.5f, 0.92f, 0.1f, 0.2f };
ImGui::PlotLines("Curve", arr, IM_ARRAYSIZE(arr));
ImGui::EndTooltip();
}
ed::Resume();
// End of "Deferred Pop-up section"
// Plot Widgets =========================================================================================
// Note: most of these plots can't be used in nodes missing, because they spawn tooltips automatically,
// so we can't trap them in our deferred pop-up mechanism. This causes them to fly into a random screen
// location.
auto plot_id = uniqueId++;
ed::BeginNode(plot_id);
ImGui::Text("Plot Demo");
ed::BeginPin(uniqueId++, ed::PinKind::Input);
ImGui::Text("-> In");
ed::EndPin();
ImGui::SameLine();
ImGui::Dummy(ImVec2(250, 0)); // Hacky magic number to space out the output pin.
ImGui::SameLine();
ed::BeginPin(uniqueId++, ed::PinKind::Output);
ImGui::Text("Out ->");
ed::EndPin();
ImGui::PushItemWidth(300);
// Animate a simple progress bar
static float progress = 0.0f, progress_dir = 1.0f;
progress += progress_dir * 0.4f * ImGui::GetIO().DeltaTime;
if (progress >= +1.1f) { progress = +1.1f; progress_dir *= -1.0f; }
if (progress <= -0.1f) { progress = -0.1f; progress_dir *= -1.0f; }
// Typically we would use ImVec2(-1.0f,0.0f) or ImVec2(-FLT_MIN,0.0f) to use all available width,
// or ImVec2(width,0.0f) for a specified width. ImVec2(0.0f,0.0f) uses ItemWidth.
ImGui::ProgressBar(progress, ImVec2(0.0f, 0.0f));
ImGui::SameLine(0.0f, ImGui::GetStyle().ItemInnerSpacing.x);
ImGui::Text("Progress Bar");
float progress_saturated = (progress < 0.0f) ? 0.0f : (progress > 1.0f) ? 1.0f : progress;
char buf[32];
portable_sprintf(buf, "%d/%d", (int)(progress_saturated * 1753), 1753);
ImGui::ProgressBar(progress, ImVec2(0.f, 0.f), buf);
ImGui::PopItemWidth();
ed::EndNode();
if (firstframe) {
ed::SetNodePosition(plot_id, ImVec2(850, 20));
}
// ==================================================================================================
// Link Drawing Section
for (auto& linkInfo : m_Links)
ed::Link(linkInfo.Id, linkInfo.InputId, linkInfo.OutputId);
// ==================================================================================================
// Interaction Handling Section
// This was coppied from BasicInteration.cpp. See that file for commented code.
// Handle creation action ---------------------------------------------------------------------------
if (ed::BeginCreate())
{
ed::PinId inputPinId, outputPinId;
if (ed::QueryNewLink(&inputPinId, &outputPinId))
{
if (inputPinId && outputPinId)
{
if (ed::AcceptNewItem())
{
m_Links.push_back({ ed::LinkId(m_NextLinkId++), inputPinId, outputPinId });
ed::Link(m_Links.back().Id, m_Links.back().InputId, m_Links.back().OutputId);
}
}
}
}
ed::EndCreate();
// Handle deletion action ---------------------------------------------------------------------------
if (ed::BeginDelete())
{
ed::LinkId deletedLinkId;
while (ed::QueryDeletedLink(&deletedLinkId))
{
if (ed::AcceptDeletedItem())
{
for (auto& link : m_Links)
{
if (link.Id == deletedLinkId)
{
m_Links.erase(&link);
break;
}
}
}
}
}
ed::EndDelete();
ed::End();
ed::SetCurrentEditor(nullptr);
firstframe = false;
//ImGui::ShowMetricsWindow();
//ImGui::ShowDemoWindow();
}
ed::EditorContext* m_Context = nullptr;
ImVector<LinkInfo> m_Links; // List of live links. It is dynamic unless you want to create read-only view over nodes.
int m_NextLinkId = 100; // Counter to help generate link ids. In real application this will probably based on pointer to user data structure.
};
int Main(int argc, char** argv)
{
Example exampe("Widgets", argc, argv);
if (exampe.Create())
return exampe.Run();
return 0;
}

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project(ScopeGuard)
add_library(ScopeGuard INTERFACE)
set(_ScopeGuard_Sources
${CMAKE_CURRENT_SOURCE_DIR}/ScopeGuard.h
)
target_include_directories(ScopeGuard INTERFACE ${CMAKE_CURRENT_SOURCE_DIR})
target_sources(ScopeGuard INTERFACE ${_ScopeGuard_Sources})
source_group("ThirdParty\\ScopeGuard" FILES ${_ScopeGuard_Sources})

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# pragma once
# include <utility>
# define AX_CONCATENATE_IMPL(s1, s2) s1##s2
# define AX_CONCATENATE(s1, s2) AX_CONCATENATE_IMPL(s1, s2)
# ifdef __COUNTER__
# define AX_ANONYMOUS_VARIABLE(str) AX_CONCATENATE(str, __COUNTER__)
# else
# define AX_ANONYMOUS_VARIABLE(str) AX_CONCATENATE(str, __LINE__)
# endif
namespace ax {
namespace scopeguard_detail {
enum class ScopeGuardOnExit {};
template <typename F>
class ScopeGuard
{
F f_;
bool active_;
public:
ScopeGuard() = delete;
ScopeGuard(const ScopeGuard&) = delete;
ScopeGuard& operator=(const ScopeGuard&) = delete;
ScopeGuard(ScopeGuard&& rhs): f_(std::move(rhs.f_)), active_(rhs.active_) { rhs.dismiss(); }
ScopeGuard(F f): f_(std::move(f)), active_(true) {}
~ScopeGuard() { if (active_) f_(); }
void dismiss() { active_ = false; }
};
template <typename F>
inline ScopeGuard<F> operator+(ScopeGuardOnExit, F&& f)
{
return ScopeGuard<F>(std::forward<F>(f));
}
} // namespace scopeguard_detail
} // namespace ax
# define AX_SCOPE_EXIT \
auto AX_ANONYMOUS_VARIABLE(AX_SCOPE_EXIT_STATE) \
= ::ax::scopeguard_detail::ScopeGuardOnExit() + [&]()

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set(_gl3w_Sources
Include/GL/gl3w.h
Include/GL/glcorearb.h
Source/gl3w.c
)
source_group("" FILES ${_gl3w_Sources})
add_library(gl3w STATIC ${_gl3w_Sources})
target_include_directories(gl3w PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/Include)
if (UNIX AND (NOT APPLE))
# Linux: GL is required to pull glXGetProcAddress
target_link_libraries(gl3w PRIVATE GL dl)
endif()
set_property(TARGET gl3w PROPERTY FOLDER "external")

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project(stb_image)
add_library(stb_image INTERFACE)
set(_stb_image_Sources
${CMAKE_CURRENT_SOURCE_DIR}/stb_image.h
)
target_include_directories(stb_image INTERFACE ${CMAKE_CURRENT_SOURCE_DIR})
target_sources(stb_image INTERFACE ${_stb_image_Sources})
source_group("ThirdParty\\stb_image" FILES ${_stb_image_Sources})

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//------------------------------------------------------------------------------
// VERSION 0.1
//
// LICENSE
// This software is dual-licensed to the public domain and under the following
// license: you are granted a perpetual, irrevocable license to copy, modify,
// publish, and distribute this file as you see fit.
//
// CREDITS
// Written by Michal Cichon
//------------------------------------------------------------------------------
# ifndef __IMGUI_BEZIER_MATH_H__
# define __IMGUI_BEZIER_MATH_H__
# pragma once
//------------------------------------------------------------------------------
# include "imgui_extra_math.h"
//------------------------------------------------------------------------------
template <typename T>
struct ImCubicBezierPointsT
{
T P0;
T P1;
T P2;
T P3;
};
using ImCubicBezierPoints = ImCubicBezierPointsT<ImVec2>;
//------------------------------------------------------------------------------
// Low-level Bezier curve sampling.
template <typename T> inline T ImLinearBezier(const T& p0, const T& p1, float t);
template <typename T> inline T ImLinearBezierDt(const T& p0, const T& p1, float t);
template <typename T> inline T ImQuadraticBezier(const T& p0, const T& p1, const T& p2, float t);
template <typename T> inline T ImQuadraticBezierDt(const T& p0, const T& p1, const T& p2, float t);
template <typename T> inline T ImCubicBezier(const T& p0, const T& p1, const T& p2, const T& p3, float t);
template <typename T> inline T ImCubicBezierDt(const T& p0, const T& p1, const T& p2, const T& p3, float t);
// High-level Bezier sampling, automatically collapse to lower level Bezier curves if control points overlap.
template <typename T> inline T ImCubicBezierSample(const T& p0, const T& p1, const T& p2, const T& p3, float t);
template <typename T> inline T ImCubicBezierSample(const ImCubicBezierPointsT<T>& curve, float t);
template <typename T> inline T ImCubicBezierTangent(const T& p0, const T& p1, const T& p2, const T& p3, float t);
template <typename T> inline T ImCubicBezierTangent(const ImCubicBezierPointsT<T>& curve, float t);
// Calculate approximate length of Cubic Bezier curve.
template <typename T> inline float ImCubicBezierLength(const T& p0, const T& p1, const T& p2, const T& p3);
template <typename T> inline float ImCubicBezierLength(const ImCubicBezierPointsT<T>& curve);
// Splits Cubic Bezier curve into two curves.
template <typename T>
struct ImCubicBezierSplitResultT
{
ImCubicBezierPointsT<T> Left;
ImCubicBezierPointsT<T> Right;
};
using ImCubicBezierSplitResult = ImCubicBezierSplitResultT<ImVec2>;
template <typename T> inline ImCubicBezierSplitResultT<T> ImCubicBezierSplit(const T& p0, const T& p1, const T& p2, const T& p3, float t);
template <typename T> inline ImCubicBezierSplitResultT<T> ImCubicBezierSplit(const ImCubicBezierPointsT<T>& curve, float t);
// Returns bounding rectangle of Cubic Bezier curve.
inline ImRect ImCubicBezierBoundingRect(const ImVec2& p0, const ImVec2& p1, const ImVec2& p2, const ImVec2& p3);
inline ImRect ImCubicBezierBoundingRect(const ImCubicBezierPoints& curve);
// Project point on Cubic Bezier curve.
struct ImProjectResult
{
ImVec2 Point; // Point on curve
float Time; // [0 - 1]
float Distance; // Distance to curve
};
inline ImProjectResult ImProjectOnCubicBezier(const ImVec2& p, const ImVec2& p0, const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, const int subdivisions = 100);
inline ImProjectResult ImProjectOnCubicBezier(const ImVec2& p, const ImCubicBezierPoints& curve, const int subdivisions = 100);
// Calculate intersection between line and a Cubic Bezier curve.
struct ImCubicBezierIntersectResult
{
int Count;
ImVec2 Points[3];
};
inline ImCubicBezierIntersectResult ImCubicBezierLineIntersect(const ImVec2& p0, const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, const ImVec2& a0, const ImVec2& a1);
inline ImCubicBezierIntersectResult ImCubicBezierLineIntersect(const ImCubicBezierPoints& curve, const ImLine& line);
// Adaptive Cubic Bezier subdivision.
enum ImCubicBezierSubdivideFlags
{
ImCubicBezierSubdivide_None = 0,
ImCubicBezierSubdivide_SkipFirst = 1
};
struct ImCubicBezierSubdivideSample
{
ImVec2 Point;
ImVec2 Tangent;
};
using ImCubicBezierSubdivideCallback = void (*)(const ImCubicBezierSubdivideSample& p, void* user_pointer);
inline void ImCubicBezierSubdivide(ImCubicBezierSubdivideCallback callback, void* user_pointer, const ImVec2& p0, const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, float tess_tol = -1.0f, ImCubicBezierSubdivideFlags flags = ImCubicBezierSubdivide_None);
inline void ImCubicBezierSubdivide(ImCubicBezierSubdivideCallback callback, void* user_pointer, const ImCubicBezierPoints& curve, float tess_tol = -1.0f, ImCubicBezierSubdivideFlags flags = ImCubicBezierSubdivide_None);
// F has signature void(const ImCubicBezierSubdivideSample& p)
template <typename F> inline void ImCubicBezierSubdivide(F& callback, const ImVec2& p0, const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, float tess_tol = -1.0f, ImCubicBezierSubdivideFlags flags = ImCubicBezierSubdivide_None);
template <typename F> inline void ImCubicBezierSubdivide(F& callback, const ImCubicBezierPoints& curve, float tess_tol = -1.0f, ImCubicBezierSubdivideFlags flags = ImCubicBezierSubdivide_None);
// Fixed step Cubic Bezier subdivision.
struct ImCubicBezierFixedStepSample
{
float T;
float Length;
ImVec2 Point;
bool BreakSearch;
};
using ImCubicBezierFixedStepCallback = void (*)(ImCubicBezierFixedStepSample& sample, void* user_pointer);
inline void ImCubicBezierFixedStep(ImCubicBezierFixedStepCallback callback, void* user_pointer, const ImVec2& p0, const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, float step, bool overshoot = false, float max_value_error = 1e-3f, float max_t_error = 1e-5f);
inline void ImCubicBezierFixedStep(ImCubicBezierFixedStepCallback callback, void* user_pointer, const ImCubicBezierPoints& curve, float step, bool overshoot = false, float max_value_error = 1e-3f, float max_t_error = 1e-5f);
// F has signature void(const ImCubicBezierFixedStepSample& p)
template <typename F> inline void ImCubicBezierFixedStep(F& callback, const ImVec2& p0, const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, float step, bool overshoot = false, float max_value_error = 1e-3f, float max_t_error = 1e-5f);
template <typename F> inline void ImCubicBezierFixedStep(F& callback, const ImCubicBezierPoints& curve, float step, bool overshoot = false, float max_value_error = 1e-3f, float max_t_error = 1e-5f);
//------------------------------------------------------------------------------
# include "imgui_bezier_math.inl"
//------------------------------------------------------------------------------
# endif // __IMGUI_BEZIER_MATH_H__

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//Disable a bunch of warnings for now
#ifndef _MSC_VER
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wshadow"
#pragma GCC diagnostic ignored "-Wunused-but-set-variable"
#pragma GCC diagnostic ignored "-Wunused-parameter"
#endif
//------------------------------------------------------------------------------
// VERSION 0.1
//
// LICENSE
// This software is dual-licensed to the public domain and under the following
// license: you are granted a perpetual, irrevocable license to copy, modify,
// publish, and distribute this file as you see fit.
//
// CREDITS
// Written by Michal Cichon
//------------------------------------------------------------------------------
# ifndef __IMGUI_BEZIER_MATH_INL__
# define __IMGUI_BEZIER_MATH_INL__
# pragma once
//------------------------------------------------------------------------------
# include "imgui_bezier_math.h"
# include <map> // used in ImCubicBezierFixedStep
//------------------------------------------------------------------------------
template <typename T>
inline T ImLinearBezier(const T& p0, const T& p1, float t)
{
return p0 + t * (p1 - p0);
}
template <typename T>
inline T ImLinearBezierDt(const T& p0, const T& p1, float t)
{
IM_UNUSED(t);
return p1 - p0;
}
template <typename T>
inline T ImQuadraticBezier(const T& p0, const T& p1, const T& p2, float t)
{
const auto a = 1 - t;
return a * a * p0 + 2 * t * a * p1 + t * t * p2;
}
template <typename T>
inline T ImQuadraticBezierDt(const T& p0, const T& p1, const T& p2, float t)
{
return 2 * (1 - t) * (p1 - p0) + 2 * t * (p2 - p1);
}
template <typename T>
inline T ImCubicBezier(const T& p0, const T& p1, const T& p2, const T& p3, float t)
{
const auto a = 1 - t;
const auto b = a * a * a;
const auto c = t * t * t;
return b * p0 + 3 * t * a * a * p1 + 3 * t * t * a * p2 + c * p3;
}
template <typename T>
inline T ImCubicBezierDt(const T& p0, const T& p1, const T& p2, const T& p3, float t)
{
const auto a = 1 - t;
const auto b = a * a;
const auto c = t * t;
const auto d = 2 * t * a;
return -3 * p0 * b + 3 * p1 * (b - d) + 3 * p2 * (d - c) + 3 * p3 * c;
}
template <typename T>
inline T ImCubicBezierSample(const T& p0, const T& p1, const T& p2, const T& p3, float t)
{
const auto cp0_zero = ImLengthSqr(p1 - p0) < 1e-5f;
const auto cp1_zero = ImLengthSqr(p3 - p2) < 1e-5f;
if (cp0_zero && cp1_zero)
return ImLinearBezier(p0, p3, t);
else if (cp0_zero)
return ImQuadraticBezier(p0, p2, p3, t);
else if (cp1_zero)
return ImQuadraticBezier(p0, p1, p3, t);
else
return ImCubicBezier(p0, p1, p2, p3, t);
}
template <typename T>
inline T ImCubicBezierSample(const ImCubicBezierPointsT<T>& curve, float t)
{
return ImCubicBezierSample(curve.P0, curve.P1, curve.P2, curve.P3, t);
}
template <typename T>
inline T ImCubicBezierTangent(const T& p0, const T& p1, const T& p2, const T& p3, float t)
{
const auto cp0_zero = ImLengthSqr(p1 - p0) < 1e-5f;
const auto cp1_zero = ImLengthSqr(p3 - p2) < 1e-5f;
if (cp0_zero && cp1_zero)
return ImLinearBezierDt(p0, p3, t);
else if (cp0_zero)
return ImQuadraticBezierDt(p0, p2, p3, t);
else if (cp1_zero)
return ImQuadraticBezierDt(p0, p1, p3, t);
else
return ImCubicBezierDt(p0, p1, p2, p3, t);
}
template <typename T>
inline T ImCubicBezierTangent(const ImCubicBezierPointsT<T>& curve, float t)
{
return ImCubicBezierTangent(curve.P0, curve.P1, curve.P2, curve.P3, t);
}
template <typename T>
inline float ImCubicBezierLength(const T& p0, const T& p1, const T& p2, const T& p3)
{
// Legendre-Gauss abscissae with n=24 (x_i values, defined at i=n as the roots of the nth order Legendre polynomial Pn(x))
static const float t_values[] =
{
-0.0640568928626056260850430826247450385909f,
0.0640568928626056260850430826247450385909f,
-0.1911188674736163091586398207570696318404f,
0.1911188674736163091586398207570696318404f,
-0.3150426796961633743867932913198102407864f,
0.3150426796961633743867932913198102407864f,
-0.4337935076260451384870842319133497124524f,
0.4337935076260451384870842319133497124524f,
-0.5454214713888395356583756172183723700107f,
0.5454214713888395356583756172183723700107f,
-0.6480936519369755692524957869107476266696f,
0.6480936519369755692524957869107476266696f,
-0.7401241915785543642438281030999784255232f,
0.7401241915785543642438281030999784255232f,
-0.8200019859739029219539498726697452080761f,
0.8200019859739029219539498726697452080761f,
-0.8864155270044010342131543419821967550873f,
0.8864155270044010342131543419821967550873f,
-0.9382745520027327585236490017087214496548f,
0.9382745520027327585236490017087214496548f,
-0.9747285559713094981983919930081690617411f,
0.9747285559713094981983919930081690617411f,
-0.9951872199970213601799974097007368118745f,
0.9951872199970213601799974097007368118745f
};
// Legendre-Gauss weights with n=24 (w_i values, defined by a function linked to in the Bezier primer article)
static const float c_values[] =
{
0.1279381953467521569740561652246953718517f,
0.1279381953467521569740561652246953718517f,
0.1258374563468282961213753825111836887264f,
0.1258374563468282961213753825111836887264f,
0.1216704729278033912044631534762624256070f,
0.1216704729278033912044631534762624256070f,
0.1155056680537256013533444839067835598622f,
0.1155056680537256013533444839067835598622f,
0.1074442701159656347825773424466062227946f,
0.1074442701159656347825773424466062227946f,
0.0976186521041138882698806644642471544279f,
0.0976186521041138882698806644642471544279f,
0.0861901615319532759171852029837426671850f,
0.0861901615319532759171852029837426671850f,
0.0733464814110803057340336152531165181193f,
0.0733464814110803057340336152531165181193f,
0.0592985849154367807463677585001085845412f,
0.0592985849154367807463677585001085845412f,
0.0442774388174198061686027482113382288593f,
0.0442774388174198061686027482113382288593f,
0.0285313886289336631813078159518782864491f,
0.0285313886289336631813078159518782864491f,
0.0123412297999871995468056670700372915759f,
0.0123412297999871995468056670700372915759f
};
static_assert(sizeof(t_values) / sizeof(*t_values) == sizeof(c_values) / sizeof(*c_values), "");
auto arc = [p0, p1, p2, p3](float t)
{
const auto p = ImCubicBezierDt(p0, p1, p2, p3, t);
const auto l = ImLength(p);
return l;
};
const auto z = 0.5f;
const auto n = sizeof(t_values) / sizeof(*t_values);
auto accumulator = 0.0f;
for (size_t i = 0; i < n; ++i)
{
const auto t = z * t_values[i] + z;
accumulator += c_values[i] * arc(t);
}
return z * accumulator;
}
template <typename T>
inline float ImCubicBezierLength(const ImCubicBezierPointsT<T>& curve)
{
return ImCubicBezierLength(curve.P0, curve.P1, curve.P2, curve.P3);
}
template <typename T>
inline ImCubicBezierSplitResultT<T> ImCubicBezierSplit(const T& p0, const T& p1, const T& p2, const T& p3, float t)
{
const auto z1 = t;
const auto z2 = z1 * z1;
const auto z3 = z1 * z1 * z1;
const auto s1 = z1 - 1;
const auto s2 = s1 * s1;
const auto s3 = s1 * s1 * s1;
return ImCubicBezierSplitResultT<T>
{
ImCubicBezierPointsT<T>
{
p0,
z1 * p1 - s1 * p0,
z2 * p2 - 2 * z1 * s1 * p1 + s2 * p0,
z3 * p3 - 3 * z2 * s1 * p2 + 3 * z1 * s2 * p1 - s3 * p0
},
ImCubicBezierPointsT<T>
{
z3 * p0 - 3 * z2 * s1 * p1 + 3 * z1 * s2 * p2 - s3 * p3,
z2 * p1 - 2 * z1 * s1 * p2 + s2 * p3,
z1 * p2 - s1 * p3,
p3,
}
};
}
template <typename T>
inline ImCubicBezierSplitResultT<T> ImCubicBezierSplit(const ImCubicBezierPointsT<T>& curve, float t)
{
return ImCubicBezierSplit(curve.P0, curve.P1, curve.P2, curve.P3, t);
}
inline ImRect ImCubicBezierBoundingRect(const ImVec2& p0, const ImVec2& p1, const ImVec2& p2, const ImVec2& p3)
{
auto a = 3 * p3 - 9 * p2 + 9 * p1 - 3 * p0;
auto b = 6 * p0 - 12 * p1 + 6 * p2;
auto c = 3 * p1 - 3 * p0;
auto delta_squared = ImMul(b, b) - 4 * ImMul(a, c);
auto tl = ImMin(p0, p3);
auto rb = ImMax(p0, p3);
# define IM_VEC2_INDEX(v, i) *(&v.x + i)
for (int i = 0; i < 2; ++i)
{
if (IM_VEC2_INDEX(a, i) == 0.0f)
continue;
if (IM_VEC2_INDEX(delta_squared, i) >= 0)
{
auto delta = ImSqrt(IM_VEC2_INDEX(delta_squared, i));
auto t0 = (-IM_VEC2_INDEX(b, i) + delta) / (2 * IM_VEC2_INDEX(a, i));
if (t0 > 0 && t0 < 1)
{
auto p = ImCubicBezier(IM_VEC2_INDEX(p0, i), IM_VEC2_INDEX(p1, i), IM_VEC2_INDEX(p2, i), IM_VEC2_INDEX(p3, i), t0);
IM_VEC2_INDEX(tl, i) = ImMin(IM_VEC2_INDEX(tl, i), p);
IM_VEC2_INDEX(rb, i) = ImMax(IM_VEC2_INDEX(rb, i), p);
}
auto t1 = (-IM_VEC2_INDEX(b, i) - delta) / (2 * IM_VEC2_INDEX(a, i));
if (t1 > 0 && t1 < 1)
{
auto p = ImCubicBezier(IM_VEC2_INDEX(p0, i), IM_VEC2_INDEX(p1, i), IM_VEC2_INDEX(p2, i), IM_VEC2_INDEX(p3, i), t1);
IM_VEC2_INDEX(tl, i) = ImMin(IM_VEC2_INDEX(tl, i), p);
IM_VEC2_INDEX(rb, i) = ImMax(IM_VEC2_INDEX(rb, i), p);
}
}
}
# undef IM_VEC2_INDEX
return ImRect(tl, rb);
}
inline ImRect ImCubicBezierBoundingRect(const ImCubicBezierPoints& curve)
{
return ImCubicBezierBoundingRect(curve.P0, curve.P1, curve.P2, curve.P3);
}
inline ImProjectResult ImProjectOnCubicBezier(const ImVec2& point, const ImVec2& p0, const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, const int subdivisions)
{
// http://pomax.github.io/bezierinfo/#projections
const float epsilon = 1e-5f;
const float fixed_step = 1.0f / static_cast<float>(subdivisions - 1);
ImProjectResult result;
result.Point = point;
result.Time = 0.0f;
result.Distance = FLT_MAX;
// Step 1: Coarse check
for (int i = 0; i < subdivisions; ++i)
{
auto t = i * fixed_step;
auto p = ImCubicBezier(p0, p1, p2, p3, t);
auto s = point - p;
auto d = ImDot(s, s);
if (d < result.Distance)
{
result.Point = p;
result.Time = t;
result.Distance = d;
}
}
if (result.Time == 0.0f || ImFabs(result.Time - 1.0f) <= epsilon)
{
result.Distance = ImSqrt(result.Distance);
return result;
}
// Step 2: Fine check
auto left = result.Time - fixed_step;
auto right = result.Time + fixed_step;
auto step = fixed_step * 0.1f;
for (auto t = left; t < right + step; t += step)
{
auto p = ImCubicBezier(p0, p1, p2, p3, t);
auto s = point - p;
auto d = ImDot(s, s);
if (d < result.Distance)
{
result.Point = p;
result.Time = t;
result.Distance = d;
}
}
result.Distance = ImSqrt(result.Distance);
return result;
}
inline ImProjectResult ImProjectOnCubicBezier(const ImVec2& p, const ImCubicBezierPoints& curve, const int subdivisions)
{
return ImProjectOnCubicBezier(p, curve.P0, curve.P1, curve.P2, curve.P3, subdivisions);
}
inline ImCubicBezierIntersectResult ImCubicBezierLineIntersect(const ImVec2& p0, const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, const ImVec2& a0, const ImVec2& a1)
{
auto cubic_roots = [](float a, float b, float c, float d, float* roots) -> int
{
int count = 0;
auto sign = [](float x) -> float { return x < 0 ? -1.0f : 1.0f; };
auto A = b / a;
auto B = c / a;
auto C = d / a;
auto Q = (3 * B - ImPow(A, 2)) / 9;
auto R = (9 * A * B - 27 * C - 2 * ImPow(A, 3)) / 54;
auto D = ImPow(Q, 3) + ImPow(R, 2); // polynomial discriminant
if (D >= 0) // complex or duplicate roots
{
auto S = sign(R + ImSqrt(D)) * ImPow(ImFabs(R + ImSqrt(D)), (1.0f / 3.0f));
auto T = sign(R - ImSqrt(D)) * ImPow(ImFabs(R - ImSqrt(D)), (1.0f / 3.0f));
roots[0] = -A / 3 + (S + T); // real root
roots[1] = -A / 3 - (S + T) / 2; // real part of complex root
roots[2] = -A / 3 - (S + T) / 2; // real part of complex root
auto Im = ImFabs(ImSqrt(3) * (S - T) / 2); // complex part of root pair
// discard complex roots
if (Im != 0)
count = 1;
else
count = 3;
}
else // distinct real roots
{
auto th = ImAcos(R / ImSqrt(-ImPow(Q, 3)));
roots[0] = 2 * ImSqrt(-Q) * ImCos(th / 3) - A / 3;
roots[1] = 2 * ImSqrt(-Q) * ImCos((th + 2 * IM_PI) / 3) - A / 3;
roots[2] = 2 * ImSqrt(-Q) * ImCos((th + 4 * IM_PI) / 3) - A / 3;
count = 3;
}
return count;
};
/*
https://github.com/kaishiqi/Geometric-Bezier/blob/master/GeometricBezier/src/kaishiqi/geometric/intersection/Intersection.as
Start with Bezier using Bernstein polynomials for weighting functions:
(1-t^3)P0 + 3t(1-t)^2P1 + 3t^2(1-t)P2 + t^3P3
Expand and collect terms to form linear combinations of original Bezier
controls. This ends up with a vector cubic in t:
(-P0+3P1-3P2+P3)t^3 + (3P0-6P1+3P2)t^2 + (-3P0+3P1)t + P0
/\ /\ /\ /\
|| || || ||
c3 c2 c1 c0
*/
// Calculate the coefficients
auto c3 = -p0 + 3 * p1 - 3 * p2 + p3;
auto c2 = 3 * p0 - 6 * p1 + 3 * p2;
auto c1 = -3 * p0 + 3 * p1;
auto c0 = p0;
// Convert line to normal form: ax + by + c = 0
auto a = a1.y - a0.y;
auto b = a0.x - a1.x;
auto c = a0.x * (a0.y - a1.y) + a0.y * (a1.x - a0.x);
// Rotate each cubic coefficient using line for new coordinate system?
// Find roots of rotated cubic
float roots[3];
auto rootCount = cubic_roots(
a * c3.x + b * c3.y,
a * c2.x + b * c2.y,
a * c1.x + b * c1.y,
a * c0.x + b * c0.y + c,
roots);
// Any roots in closed interval [0,1] are intersections on Bezier, but
// might not be on the line segment.
// Find intersections and calculate point coordinates
auto min = ImMin(a0, a1);
auto max = ImMax(a0, a1);
ImCubicBezierIntersectResult result;
auto points = result.Points;
for (int i = 0; i < rootCount; ++i)
{
auto root = roots[i];
if (0 <= root && root <= 1)
{
// We're within the Bezier curve
// Find point on Bezier
auto p = ImCubicBezier(p0, p1, p2, p3, root);
// See if point is on line segment
// Had to make special cases for vertical and horizontal lines due
// to slight errors in calculation of p00
if (a0.x == a1.x)
{
if (min.y <= p.y && p.y <= max.y)
*points++ = p;
}
else if (a0.y == a1.y)
{
if (min.x <= p.x && p.x <= max.x)
*points++ = p;
}
else if (p.x >= min.x && p.y >= min.y && p.x <= max.x && p.y <= max.y)
{
*points++ = p;
}
}
}
result.Count = static_cast<int>(points - result.Points);
return result;
}
inline ImCubicBezierIntersectResult ImCubicBezierLineIntersect(const ImCubicBezierPoints& curve, const ImLine& line)
{
return ImCubicBezierLineIntersect(curve.P0, curve.P1, curve.P2, curve.P3, line.A, line.B);
}
inline void ImCubicBezierSubdivide(ImCubicBezierSubdivideCallback callback, void* user_pointer, const ImVec2& p0, const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, float tess_tol, ImCubicBezierSubdivideFlags flags)
{
return ImCubicBezierSubdivide(callback, user_pointer, ImCubicBezierPoints{ p0, p1, p2, p3 }, tess_tol, flags);
}
inline void ImCubicBezierSubdivide(ImCubicBezierSubdivideCallback callback, void* user_pointer, const ImCubicBezierPoints& curve, float tess_tol, ImCubicBezierSubdivideFlags flags)
{
struct Tesselator
{
ImCubicBezierSubdivideCallback Callback;
void* UserPointer;
float TesselationTollerance;
ImCubicBezierSubdivideFlags Flags;
void Commit(const ImVec2& p, const ImVec2& t)
{
ImCubicBezierSubdivideSample sample;
sample.Point = p;
sample.Tangent = t;
Callback(sample, UserPointer);
}
void Subdivide(const ImCubicBezierPoints& curve, int level = 0)
{
float dx = curve.P3.x - curve.P0.x;
float dy = curve.P3.y - curve.P0.y;
float d2 = ((curve.P1.x - curve.P3.x) * dy - (curve.P1.y - curve.P3.y) * dx);
float d3 = ((curve.P2.x - curve.P3.x) * dy - (curve.P2.y - curve.P3.y) * dx);
d2 = (d2 >= 0) ? d2 : -d2;
d3 = (d3 >= 0) ? d3 : -d3;
if ((d2 + d3) * (d2 + d3) < TesselationTollerance * (dx * dx + dy * dy))
{
Commit(curve.P3, ImCubicBezierTangent(curve, 1.0f));
}
else if (level < 10)
{
const auto p12 = (curve.P0 + curve.P1) * 0.5f;
const auto p23 = (curve.P1 + curve.P2) * 0.5f;
const auto p34 = (curve.P2 + curve.P3) * 0.5f;
const auto p123 = (p12 + p23) * 0.5f;
const auto p234 = (p23 + p34) * 0.5f;
const auto p1234 = (p123 + p234) * 0.5f;
Subdivide(ImCubicBezierPoints { curve.P0, p12, p123, p1234 }, level + 1);
Subdivide(ImCubicBezierPoints { p1234, p234, p34, curve.P3 }, level + 1);
}
}
};
if (tess_tol < 0)
tess_tol = 1.118f; // sqrtf(1.25f)
Tesselator tesselator;
tesselator.Callback = callback;
tesselator.UserPointer = user_pointer;
tesselator.TesselationTollerance = tess_tol * tess_tol;
tesselator.Flags = flags;
if (!(tesselator.Flags & ImCubicBezierSubdivide_SkipFirst))
tesselator.Commit(curve.P0, ImCubicBezierTangent(curve, 0.0f));
tesselator.Subdivide(curve, 0);
}
template <typename F> inline void ImCubicBezierSubdivide(F& callback, const ImVec2& p0, const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, float tess_tol, ImCubicBezierSubdivideFlags flags)
{
auto handler = [](const ImCubicBezierSubdivideSample& p, void* user_pointer)
{
auto& callback = *reinterpret_cast<F*>(user_pointer);
callback(p);
};
ImCubicBezierSubdivide(handler, &callback, ImCubicBezierPoints{ p0, p1, p2, p3 }, tess_tol, flags);
}
template <typename F> inline void ImCubicBezierSubdivide(F& callback, const ImCubicBezierPoints& curve, float tess_tol, ImCubicBezierSubdivideFlags flags)
{
auto handler = [](const ImCubicBezierSubdivideSample& p, void* user_pointer)
{
auto& callback = *reinterpret_cast<F*>(user_pointer);
callback(p);
};
ImCubicBezierSubdivide(handler, &callback, curve, tess_tol, flags);
}
inline void ImCubicBezierFixedStep(ImCubicBezierFixedStepCallback callback, void* user_pointer, const ImVec2& p0, const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, float step, bool overshoot, float max_value_error, float max_t_error)
{
if (step <= 0.0f || !callback || max_value_error <= 0 || max_t_error <= 0)
return;
ImCubicBezierFixedStepSample sample;
sample.T = 0.0f;
sample.Length = 0.0f;
sample.Point = p0;
sample.BreakSearch = false;
callback(sample, user_pointer);
if (sample.BreakSearch)
return;
const auto total_length = ImCubicBezierLength(p0, p1, p2, p3);
const auto point_count = static_cast<int>(total_length / step) + (overshoot ? 2 : 1);
const auto t_min = 0.0f;
const auto t_max = step * point_count / total_length;
const auto t_0 = (t_min + t_max) * 0.5f;
// #todo: replace map with ImVector + binary search
std::map<float, float> cache;
for (int point_index = 1; point_index < point_count; ++point_index)
{
const auto targetLength = point_index * step;
float t_start = t_min;
float t_end = t_max;
float t = t_0;
float t_best = t;
float error_best = total_length;
while (true)
{
auto cacheIt = cache.find(t);
if (cacheIt == cache.end())
{
const auto front = ImCubicBezierSplit(p0, p1, p2, p3, t).Left;
const auto split_length = ImCubicBezierLength(front);
cacheIt = cache.emplace(t, split_length).first;
}
const auto length = cacheIt->second;
const auto error = targetLength - length;
if (error < error_best)
{
error_best = error;
t_best = t;
}
if (ImFabs(error) <= max_value_error || ImFabs(t_start - t_end) <= max_t_error)
{
sample.T = t;
sample.Length = length;
sample.Point = ImCubicBezier(p0, p1, p2, p3, t);
callback(sample, user_pointer);
if (sample.BreakSearch)
return;
break;
}
else if (error < 0.0f)
t_end = t;
else // if (error > 0.0f)
t_start = t;
t = (t_start + t_end) * 0.5f;
}
}
}
inline void ImCubicBezierFixedStep(ImCubicBezierFixedStepCallback callback, void* user_pointer, const ImCubicBezierPoints& curve, float step, bool overshoot, float max_value_error, float max_t_error)
{
ImCubicBezierFixedStep(callback, user_pointer, curve.P0, curve.P1, curve.P2, curve.P3, step, overshoot, max_value_error, max_t_error);
}
// F has signature void(const ImCubicBezierFixedStepSample& p)
template <typename F>
inline void ImCubicBezierFixedStep(F& callback, const ImVec2& p0, const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, float step, bool overshoot, float max_value_error, float max_t_error)
{
auto handler = [](ImCubicBezierFixedStepSample& sample, void* user_pointer)
{
auto& callback = *reinterpret_cast<F*>(user_pointer);
callback(sample);
};
ImCubicBezierFixedStep(handler, &callback, p0, p1, p2, p3, step, overshoot, max_value_error, max_t_error);
}
template <typename F>
inline void ImCubicBezierFixedStep(F& callback, const ImCubicBezierPoints& curve, float step, bool overshoot, float max_value_error, float max_t_error)
{
auto handler = [](ImCubicBezierFixedStepSample& sample, void* user_pointer)
{
auto& callback = *reinterpret_cast<F*>(user_pointer);
callback(sample);
};
ImCubicBezierFixedStep(handler, &callback, curve.P0, curve.P1, curve.P2, curve.P3, step, overshoot, max_value_error, max_t_error);
}
//------------------------------------------------------------------------------
# endif // __IMGUI_BEZIER_MATH_INL__
#ifndef _MSC_VER
#pragma GCC diagnostic pop
#endif

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# define IMGUI_DEFINE_MATH_OPERATORS
# include "imgui_canvas.h"
# include <type_traits>
// https://stackoverflow.com/a/36079786
# define DECLARE_HAS_MEMBER(__trait_name__, __member_name__) \
\
template <typename __boost_has_member_T__> \
class __trait_name__ \
{ \
using check_type = ::std::remove_const_t<__boost_has_member_T__>; \
struct no_type {char x[2];}; \
using yes_type = char; \
\
struct base { void __member_name__() {}}; \
struct mixin : public base, public check_type {}; \
\
template <void (base::*)()> struct aux {}; \
\
template <typename U> static no_type test(aux<&U::__member_name__>*); \
template <typename U> static yes_type test(...); \
\
public: \
\
static constexpr bool value = (sizeof(yes_type) == sizeof(test<mixin>(0))); \
}
namespace ImCanvasDetails {
DECLARE_HAS_MEMBER(HasFringeScale, _FringeScale);
struct FringeScaleRef
{
// Overload is present when ImDrawList does have _FringeScale member variable.
template <typename T>
static float& Get(typename std::enable_if<HasFringeScale<T>::value, T>::type* drawList)
{
return drawList->_FringeScale;
}
// Overload is present when ImDrawList does not have _FringeScale member variable.
template <typename T>
static float& Get(typename std::enable_if<!HasFringeScale<T>::value, T>::type*)
{
static float placeholder = 1.0f;
return placeholder;
}
};
DECLARE_HAS_MEMBER(HasVtxCurrentOffset, _VtxCurrentOffset);
struct VtxCurrentOffsetRef
{
// Overload is present when ImDrawList does have _FringeScale member variable.
template <typename T>
static unsigned int& Get(typename std::enable_if<HasVtxCurrentOffset<T>::value, T>::type* drawList)
{
return drawList->_VtxCurrentOffset;
}
// Overload is present when ImDrawList does not have _FringeScale member variable.
template <typename T>
static unsigned int& Get(typename std::enable_if<!HasVtxCurrentOffset<T>::value, T>::type* drawList)
{
return drawList->_CmdHeader.VtxOffset;
}
};
} // namespace ImCanvasDetails
// Returns a reference to _FringeScale extension to ImDrawList
//
// If ImDrawList does not have _FringeScale a placeholder is returned.
static inline float& ImFringeScaleRef(ImDrawList* drawList)
{
using namespace ImCanvasDetails;
return FringeScaleRef::Get<ImDrawList>(drawList);
}
static inline unsigned int& ImVtxOffsetRef(ImDrawList* drawList)
{
using namespace ImCanvasDetails;
return VtxCurrentOffsetRef::Get<ImDrawList>(drawList);
}
static inline ImVec2 ImSelectPositive(const ImVec2& lhs, const ImVec2& rhs) { return ImVec2(lhs.x > 0.0f ? lhs.x : rhs.x, lhs.y > 0.0f ? lhs.y : rhs.y); }
bool ImGuiEx::Canvas::Begin(const char* id, const ImVec2& size)
{
return Begin(ImGui::GetID(id), size);
}
bool ImGuiEx::Canvas::Begin(ImGuiID id, const ImVec2& size)
{
IM_ASSERT(m_InBeginEnd == false);
m_WidgetPosition = ImGui::GetCursorScreenPos();
m_WidgetSize = ImSelectPositive(size, ImGui::GetContentRegionAvail());
m_WidgetRect = ImRect(m_WidgetPosition, m_WidgetPosition + m_WidgetSize);
m_DrawList = ImGui::GetWindowDrawList();
UpdateViewTransformPosition();
# if IMGUI_VERSION_NUM > 18415
if (ImGui::IsClippedEx(m_WidgetRect, id))
return false;
# else
if (ImGui::IsClippedEx(m_WidgetRect, id, false))
return false;
# endif
// Save current channel, so we can assert when user
// call canvas API with different one.
m_ExpectedChannel = m_DrawList->_Splitter._Current;
// #debug: Canvas content.
//m_DrawList->AddRectFilled(m_StartPos, m_StartPos + m_CurrentSize, IM_COL32(0, 0, 0, 64));
m_DrawList->AddRect(m_WidgetRect.Min, m_WidgetRect.Max, IM_COL32(255, 0, 255, 64));
ImGui::SetCursorScreenPos(ImVec2(0.0f, 0.0f));
# if IMGUI_EX_CANVAS_DEFERED()
m_Ranges.resize(0);
# endif
SaveInputState();
SaveViewportState();
// Record cursor max to prevent scrollbars from appearing.
m_WindowCursorMaxBackup = ImGui::GetCurrentWindow()->DC.CursorMaxPos;
EnterLocalSpace();
// Emit dummy widget matching bounds of the canvas.
ImGui::SetCursorScreenPos(m_ViewRect.Min);
ImGui::Dummy(m_ViewRect.GetSize());
ImGui::SetCursorScreenPos(ImVec2(0.0f, 0.0f));
m_InBeginEnd = true;
return true;
}
void ImGuiEx::Canvas::End()
{
// If you're here your call to Begin() returned false,
// or Begin() wasn't called at all.
IM_ASSERT(m_InBeginEnd == true);
// If you're here, please make sure you do not interleave
// channel splitter with canvas.
// Always call canvas function with using same channel.
IM_ASSERT(m_DrawList->_Splitter._Current == m_ExpectedChannel);
//auto& io = ImGui::GetIO();
// Check: Unmatched calls to Suspend() / Resume(). Please check your code.
IM_ASSERT(m_SuspendCounter == 0);
LeaveLocalSpace();
ImGui::GetCurrentWindow()->DC.CursorMaxPos = m_WindowCursorMaxBackup;
ImGui::SetItemAllowOverlap();
// Emit dummy widget matching bounds of the canvas.
ImGui::SetCursorScreenPos(m_WidgetPosition);
ImGui::Dummy(m_WidgetSize);
// #debug: Rect around canvas. Content should be inside these bounds.
//m_DrawList->AddRect(m_WidgetPosition - ImVec2(1.0f, 1.0f), m_WidgetPosition + m_WidgetSize + ImVec2(1.0f, 1.0f), IM_COL32(196, 0, 0, 255));
m_InBeginEnd = false;
}
void ImGuiEx::Canvas::SetView(const ImVec2& origin, float scale)
{
SetView(CanvasView(origin, scale));
}
void ImGuiEx::Canvas::SetView(const CanvasView& view)
{
if (m_InBeginEnd)
LeaveLocalSpace();
if (m_View.Origin.x != view.Origin.x || m_View.Origin.y != view.Origin.y)
{
m_View.Origin = view.Origin;
UpdateViewTransformPosition();
}
if (m_View.Scale != view.Scale)
{
m_View.Scale = view.Scale;
m_View.InvScale = view.InvScale;
}
if (m_InBeginEnd)
EnterLocalSpace();
}
void ImGuiEx::Canvas::CenterView(const ImVec2& canvasPoint)
{
auto view = CalcCenterView(canvasPoint);
SetView(view);
}
ImGuiEx::CanvasView ImGuiEx::Canvas::CalcCenterView(const ImVec2& canvasPoint) const
{
auto localCenter = ToLocal(m_WidgetPosition + m_WidgetSize * 0.5f);
auto localOffset = canvasPoint - localCenter;
auto offset = FromLocalV(localOffset);
return CanvasView{ m_View.Origin - offset, m_View.Scale };
}
void ImGuiEx::Canvas::CenterView(const ImRect& canvasRect)
{
auto view = CalcCenterView(canvasRect);
SetView(view);
}
ImGuiEx::CanvasView ImGuiEx::Canvas::CalcCenterView(const ImRect& canvasRect) const
{
auto canvasRectSize = canvasRect.GetSize();
if (canvasRectSize.x <= 0.0f || canvasRectSize.y <= 0.0f)
return View();
auto widgetAspectRatio = m_WidgetSize.y > 0.0f ? m_WidgetSize.x / m_WidgetSize.y : 0.0f;
auto canvasRectAspectRatio = canvasRectSize.y > 0.0f ? canvasRectSize.x / canvasRectSize.y : 0.0f;
if (widgetAspectRatio <= 0.0f || canvasRectAspectRatio <= 0.0f)
return View();
auto newOrigin = m_View.Origin;
auto newScale = m_View.Scale;
if (canvasRectAspectRatio > widgetAspectRatio)
{
// width span across view
newScale = m_WidgetSize.x / canvasRectSize.x;
newOrigin = canvasRect.Min * -newScale;
newOrigin.y += (m_WidgetSize.y - canvasRectSize.y * newScale) * 0.5f;
}
else
{
// height span across view
newScale = m_WidgetSize.y / canvasRectSize.y;
newOrigin = canvasRect.Min * -newScale;
newOrigin.x += (m_WidgetSize.x - canvasRectSize.x * newScale) * 0.5f;
}
return CanvasView{ newOrigin, newScale };
}
void ImGuiEx::Canvas::Suspend()
{
// If you're here, please make sure you do not interleave
// channel splitter with canvas.
// Always call canvas function with using same channel.
IM_ASSERT(m_DrawList->_Splitter._Current == m_ExpectedChannel);
if (m_SuspendCounter == 0)
LeaveLocalSpace();
++m_SuspendCounter;
}
void ImGuiEx::Canvas::Resume()
{
// If you're here, please make sure you do not interleave
// channel splitter with canvas.
// Always call canvas function with using same channel.
IM_ASSERT(m_DrawList->_Splitter._Current == m_ExpectedChannel);
// Check: Number of calls to Resume() do not match calls to Suspend(). Please check your code.
IM_ASSERT(m_SuspendCounter > 0);
if (--m_SuspendCounter == 0)
EnterLocalSpace();
}
ImVec2 ImGuiEx::Canvas::FromLocal(const ImVec2& point) const
{
return point * m_View.Scale + m_ViewTransformPosition;
}
ImVec2 ImGuiEx::Canvas::FromLocal(const ImVec2& point, const CanvasView& view) const
{
return point * view.Scale + view.Origin + m_WidgetPosition;
}
ImVec2 ImGuiEx::Canvas::FromLocalV(const ImVec2& vector) const
{
return vector * m_View.Scale;
}
ImVec2 ImGuiEx::Canvas::FromLocalV(const ImVec2& vector, const CanvasView& view) const
{
return vector * view.Scale;
}
ImVec2 ImGuiEx::Canvas::ToLocal(const ImVec2& point) const
{
return (point - m_ViewTransformPosition) * m_View.InvScale;
}
ImVec2 ImGuiEx::Canvas::ToLocal(const ImVec2& point, const CanvasView& view) const
{
return (point - view.Origin - m_WidgetPosition) * view.InvScale;
}
ImVec2 ImGuiEx::Canvas::ToLocalV(const ImVec2& vector) const
{
return vector * m_View.InvScale;
}
ImVec2 ImGuiEx::Canvas::ToLocalV(const ImVec2& vector, const CanvasView& view) const
{
return vector * view.InvScale;
}
ImRect ImGuiEx::Canvas::CalcViewRect(const CanvasView& view) const
{
ImRect result;
result.Min = ImVec2(-view.Origin.x, -view.Origin.y) * view.InvScale;
result.Max = (m_WidgetSize - view.Origin) * view.InvScale;
return result;
}
void ImGuiEx::Canvas::UpdateViewTransformPosition()
{
m_ViewTransformPosition = m_View.Origin + m_WidgetPosition;
}
void ImGuiEx::Canvas::SaveInputState()
{
auto& io = ImGui::GetIO();
m_MousePosBackup = io.MousePos;
m_MousePosPrevBackup = io.MousePosPrev;
for (auto i = 0; i < IM_ARRAYSIZE(m_MouseClickedPosBackup); ++i)
m_MouseClickedPosBackup[i] = io.MouseClickedPos[i];
}
void ImGuiEx::Canvas::RestoreInputState()
{
auto& io = ImGui::GetIO();
io.MousePos = m_MousePosBackup;
io.MousePosPrev = m_MousePosPrevBackup;
for (auto i = 0; i < IM_ARRAYSIZE(m_MouseClickedPosBackup); ++i)
io.MouseClickedPos[i] = m_MouseClickedPosBackup[i];
}
void ImGuiEx::Canvas::SaveViewportState()
{
# if defined(IMGUI_HAS_VIEWPORT)
auto window = ImGui::GetCurrentWindow();
auto viewport = ImGui::GetWindowViewport();
m_WindowPosBackup = window->Pos;
m_ViewportPosBackup = viewport->Pos;
m_ViewportSizeBackup = viewport->Size;
# if IMGUI_VERSION_NUM > 18002
m_ViewportWorkPosBackup = viewport->WorkPos;
m_ViewportWorkSizeBackup = viewport->WorkSize;
# else
m_ViewportWorkOffsetMinBackup = viewport->WorkOffsetMin;
m_ViewportWorkOffsetMaxBackup = viewport->WorkOffsetMax;
# endif
# endif
}
void ImGuiEx::Canvas::RestoreViewportState()
{
# if defined(IMGUI_HAS_VIEWPORT)
auto window = ImGui::GetCurrentWindow();
auto viewport = ImGui::GetWindowViewport();
window->Pos = m_WindowPosBackup;
viewport->Pos = m_ViewportPosBackup;
viewport->Size = m_ViewportSizeBackup;
# if IMGUI_VERSION_NUM > 18002
viewport->WorkPos = m_ViewportWorkPosBackup;
viewport->WorkSize = m_ViewportWorkSizeBackup;
# else
viewport->WorkOffsetMin = m_ViewportWorkOffsetMinBackup;
viewport->WorkOffsetMax = m_ViewportWorkOffsetMaxBackup;
# endif
# endif
}
void ImGuiEx::Canvas::EnterLocalSpace()
{
// Prepare ImDrawList for drawing in local coordinate system:
// - determine visible part of the canvas
// - start unique draw command
// - add clip rect matching canvas size
// - record current command index
// - record current vertex write index
// Determine visible part of the canvas. Make it before
// adding new command, to avoid round rip where command
// is removed in PopClipRect() and added again next PushClipRect().
ImGui::PushClipRect(m_WidgetPosition, m_WidgetPosition + m_WidgetSize, true);
auto clipped_clip_rect = m_DrawList->_ClipRectStack.back();
ImGui::PopClipRect();
// Make sure we do not share draw command with anyone. We don't want to mess
// with someones clip rectangle.
// #FIXME:
// This condition is not enough to avoid when user choose
// to use channel splitter.
//
// To deal with Suspend()/Resume() calls empty draw command
// is always added then splitter is active. Otherwise
// channel merger will collapse our draw command one with
// different clip rectangle.
//
// More investigation is needed. To get to the bottom of this.
if ((!m_DrawList->CmdBuffer.empty() && m_DrawList->CmdBuffer.back().ElemCount > 0) || m_DrawList->_Splitter._Count > 1)
m_DrawList->AddDrawCmd();
# if IMGUI_EX_CANVAS_DEFERED()
m_Ranges.resize(m_Ranges.Size + 1);
m_CurrentRange = &m_Ranges.back();
m_CurrentRange->BeginComandIndex = ImMax(m_DrawList->CmdBuffer.Size - 1, 0);
m_CurrentRange->BeginVertexIndex = m_DrawList->_VtxCurrentIdx + ImVtxOffsetRef(m_DrawList);
# endif
m_DrawListCommadBufferSize = ImMax(m_DrawList->CmdBuffer.Size - 1, 0);
m_DrawListStartVertexIndex = m_DrawList->_VtxCurrentIdx + ImVtxOffsetRef(m_DrawList);
# if defined(IMGUI_HAS_VIEWPORT)
auto window = ImGui::GetCurrentWindow();
window->Pos = ImVec2(0.0f, 0.0f);
auto viewport_min = m_ViewportPosBackup;
auto viewport_max = m_ViewportPosBackup + m_ViewportSizeBackup;
viewport_min.x = (viewport_min.x - m_ViewTransformPosition.x) * m_View.InvScale;
viewport_min.y = (viewport_min.y - m_ViewTransformPosition.y) * m_View.InvScale;
viewport_max.x = (viewport_max.x - m_ViewTransformPosition.x) * m_View.InvScale;
viewport_max.y = (viewport_max.y - m_ViewTransformPosition.y) * m_View.InvScale;
auto viewport = ImGui::GetWindowViewport();
viewport->Pos = viewport_min;
viewport->Size = viewport_max - viewport_min;
# if IMGUI_VERSION_NUM > 18002
viewport->WorkPos = m_ViewportWorkPosBackup * m_View.InvScale;
viewport->WorkSize = m_ViewportWorkSizeBackup * m_View.InvScale;
# else
viewport->WorkOffsetMin = m_ViewportWorkOffsetMinBackup * m_View.InvScale;
viewport->WorkOffsetMax = m_ViewportWorkOffsetMaxBackup * m_View.InvScale;
# endif
# endif
// Clip rectangle in parent canvas space and move it to local space.
clipped_clip_rect.x = (clipped_clip_rect.x - m_ViewTransformPosition.x) * m_View.InvScale;
clipped_clip_rect.y = (clipped_clip_rect.y - m_ViewTransformPosition.y) * m_View.InvScale;
clipped_clip_rect.z = (clipped_clip_rect.z - m_ViewTransformPosition.x) * m_View.InvScale;
clipped_clip_rect.w = (clipped_clip_rect.w - m_ViewTransformPosition.y) * m_View.InvScale;
ImGui::PushClipRect(ImVec2(clipped_clip_rect.x, clipped_clip_rect.y), ImVec2(clipped_clip_rect.z, clipped_clip_rect.w), false);
// Transform mouse position to local space.
auto& io = ImGui::GetIO();
io.MousePos = (m_MousePosBackup - m_ViewTransformPosition) * m_View.InvScale;
io.MousePosPrev = (m_MousePosPrevBackup - m_ViewTransformPosition) * m_View.InvScale;
for (auto i = 0; i < IM_ARRAYSIZE(m_MouseClickedPosBackup); ++i)
io.MouseClickedPos[i] = (m_MouseClickedPosBackup[i] - m_ViewTransformPosition) * m_View.InvScale;
m_ViewRect = CalcViewRect(m_View);;
auto& fringeScale = ImFringeScaleRef(m_DrawList);
m_LastFringeScale = fringeScale;
fringeScale *= m_View.InvScale;
}
void ImGuiEx::Canvas::LeaveLocalSpace()
{
IM_ASSERT(m_DrawList->_Splitter._Current == m_ExpectedChannel);
# if IMGUI_EX_CANVAS_DEFERED()
IM_ASSERT(m_CurrentRange != nullptr);
m_CurrentRange->EndVertexIndex = m_DrawList->_VtxCurrentIdx + ImVtxOffsetRef(m_DrawList);
m_CurrentRange->EndCommandIndex = m_DrawList->CmdBuffer.size();
if (m_CurrentRange->BeginVertexIndex == m_CurrentRange->EndVertexIndex)
{
// Drop empty range
m_Ranges.resize(m_Ranges.Size - 1);
}
m_CurrentRange = nullptr;
# endif
// Move vertices to screen space.
auto vertex = m_DrawList->VtxBuffer.Data + m_DrawListStartVertexIndex;
auto vertexEnd = m_DrawList->VtxBuffer.Data + m_DrawList->_VtxCurrentIdx + ImVtxOffsetRef(m_DrawList);
// If canvas view is not scaled take a faster path.
if (m_View.Scale != 1.0f)
{
while (vertex < vertexEnd)
{
vertex->pos.x = vertex->pos.x * m_View.Scale + m_ViewTransformPosition.x;
vertex->pos.y = vertex->pos.y * m_View.Scale + m_ViewTransformPosition.y;
++vertex;
}
// Move clip rectangles to screen space.
for (int i = m_DrawListCommadBufferSize; i < m_DrawList->CmdBuffer.size(); ++i)
{
auto& command = m_DrawList->CmdBuffer[i];
command.ClipRect.x = command.ClipRect.x * m_View.Scale + m_ViewTransformPosition.x;
command.ClipRect.y = command.ClipRect.y * m_View.Scale + m_ViewTransformPosition.y;
command.ClipRect.z = command.ClipRect.z * m_View.Scale + m_ViewTransformPosition.x;
command.ClipRect.w = command.ClipRect.w * m_View.Scale + m_ViewTransformPosition.y;
}
}
else
{
while (vertex < vertexEnd)
{
vertex->pos.x = vertex->pos.x + m_ViewTransformPosition.x;
vertex->pos.y = vertex->pos.y + m_ViewTransformPosition.y;
++vertex;
}
// Move clip rectangles to screen space.
for (int i = m_DrawListCommadBufferSize; i < m_DrawList->CmdBuffer.size(); ++i)
{
auto& command = m_DrawList->CmdBuffer[i];
command.ClipRect.x = command.ClipRect.x + m_ViewTransformPosition.x;
command.ClipRect.y = command.ClipRect.y + m_ViewTransformPosition.y;
command.ClipRect.z = command.ClipRect.z + m_ViewTransformPosition.x;
command.ClipRect.w = command.ClipRect.w + m_ViewTransformPosition.y;
}
}
auto& fringeScale = ImFringeScaleRef(m_DrawList);
fringeScale = m_LastFringeScale;
// And pop \o/
ImGui::PopClipRect();
RestoreInputState();
RestoreViewportState();
}

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// Canvas widget - view over infinite virtual space.
//
// Canvas allows you to draw your widgets anywhere over infinite space and provide
// view over it with support for panning and scaling.
//
// When you enter a canvas ImGui is moved to virtual space which mean:
// - ImGui::GetCursorScreenPos() return (0, 0) and which correspond to top left corner
// of the canvas on the screen (this can be changed using CanvasView()).
// - Mouse input is brought to canvas space, so widgets works as usual.
// - Everything you draw with ImDrawList will be in virtual space.
//
// By default origin point is on top left corner of canvas widget. It can be
// changed with call to CanvasView() where you can specify what part of space
// should be viewed by setting viewport origin point and scale. Current state
// can be queried with CanvasViewOrigin() and CanvasViewScale().
//
// Viewport size is controlled by 'size' parameter in BeginCanvas(). You can query
// it using CanvasContentMin/Max/Size functions. They are useful if you to not specify
// canvas size in which case all free space is used.
//
// Bounds of visible region of infinite space can be queried using CanvasViewMin/Max/Size
// functions. Everything that is drawn outside of this region will be clipped
// as usual in ImGui.
//
// While drawing inside canvas you can translate position from world (usual ImGui space)
// to virtual space and back using CanvasFromWorld()/CanvasToWorld().
//
// Canvas can be nested in each other (they are regular widgets after all). There
// is a way to transform position between current and parent canvas with
// CanvasFromParent()/CanvasToParent().
//
// Sometimes in more elaborate scenarios you want to move out canvas virtual space,
// do something and came back. You can do that with SuspendCanvas() and ResumeCanvas().
//
// Note:
// It is not valid to call canvas API outside of BeginCanvas() / EndCanvas() scope.
//
// VERSION 0.1
//
// LICENSE
// This software is dual-licensed to the public domain and under the following
// license: you are granted a perpetual, irrevocable license to copy, modify,
// publish, and distribute this file as you see fit.
//
// CREDITS
// Written by Michal Cichon
# ifndef __IMGUI_EX_CANVAS_H__
# define __IMGUI_EX_CANVAS_H__
# pragma once
# include <imgui.h>
# include <imgui_internal.h> // ImRect, ImFloor
namespace ImGuiEx {
struct CanvasView
{
ImVec2 Origin;
float Scale = 1.0f;
float InvScale = 1.0f;
CanvasView() = default;
CanvasView(const ImVec2& origin, float scale)
: Origin(origin)
, Scale(scale)
, InvScale(scale ? 1.0f / scale : 0.0f)
{
}
void Set(const ImVec2& origin, float scale)
{
*this = CanvasView(origin, scale);
}
};
// Canvas widget represent view over infinite plane.
//
// It acts like a child window without scroll bars with
// ability to zoom to specific part of canvas plane.
//
// Widgets are clipped according to current view exactly
// same way ImGui do. To avoid `missing widgets` artifacts first
// setup visible region with SetView() then draw content.
//
// Everything drawn with ImDrawList betwen calls to Begin()/End()
// will be drawn on canvas plane. This behavior can be suspended
// by calling Suspend() and resumed by calling Resume().
//
// Warning:
// Please do not interleave canvas with use of channel splitter.
// Keep channel splitter contained inside canvas or always
// call canvas functions from same channel.
struct Canvas
{
// Begins drawing content of canvas plane.
//
// When false is returned that mean canvas is not visible to the
// user can drawing should be skipped and End() not called.
// When true is returned drawing must be ended with call to End().
//
// If any size component is equal to zero or less canvas will
// automatically expand to all available area on that axis.
// So (0, 300) will take horizontal space and have height
// of 300 points. (0, 0) will take all remaining space of
// the window.
//
// You can query size of the canvas while it is being drawn
// by calling Rect().
bool Begin(const char* id, const ImVec2& size);
bool Begin(ImGuiID id, const ImVec2& size);
// Ends interaction with canvas plane.
//
// Must be called only when Begin() retuned true.
void End();
// Sets visible region of canvas plane.
//
// Origin is an offset of infinite plane origin from top left
// corner of the canvas.
//
// Scale greater than 1 make canvas content be bigger, less than 1 smaller.
void SetView(const ImVec2& origin, float scale);
void SetView(const CanvasView& view);
// Centers view over specific point on canvas plane.
//
// View will be centered on specific point by changing origin
// but not scale.
void CenterView(const ImVec2& canvasPoint);
// Calculates view over specific point on canvas plane.
CanvasView CalcCenterView(const ImVec2& canvasPoint) const;
// Centers view over specific rectangle on canvas plane.
//
// Whole rectangle will fit in canvas view. This will affect both
// origin and scale.
void CenterView(const ImRect& canvasRect);
// Calculates view over specific rectangle on canvas plane.
CanvasView CalcCenterView(const ImRect& canvasRect) const;
// Suspends canvas by returning to normal ImGui transformation space.
// While suspended UI will not be drawn on canvas plane.
//
// Calls to Suspend()/Resume() are symetrical. Each call to Suspend()
// must be matched with call to Resume().
void Suspend();
void Resume();
// Transforms point from canvas plane to ImGui.
ImVec2 FromLocal(const ImVec2& point) const;
ImVec2 FromLocal(const ImVec2& point, const CanvasView& view) const;
// Transforms vector from canvas plant to ImGui.
ImVec2 FromLocalV(const ImVec2& vector) const;
ImVec2 FromLocalV(const ImVec2& vector, const CanvasView& view) const;
// Transforms point from ImGui to canvas plane.
ImVec2 ToLocal(const ImVec2& point) const;
ImVec2 ToLocal(const ImVec2& point, const CanvasView& view) const;
// Transforms vector from ImGui to canvas plane.
ImVec2 ToLocalV(const ImVec2& vector) const;
ImVec2 ToLocalV(const ImVec2& vector, const CanvasView& view) const;
// Returns widget bounds.
//
// Note:
// Rect is valid after call to Begin().
const ImRect& Rect() const { return m_WidgetRect; }
// Returns visible region on canvas plane (in canvas plane coordinates).
const ImRect& ViewRect() const { return m_ViewRect; }
// Calculates visible region for view.
ImRect CalcViewRect(const CanvasView& view) const;
// Returns current view.
const CanvasView& View() const { return m_View; }
// Returns origin of the view.
//
// Origin is an offset of infinite plane origin from top left
// corner of the canvas.
const ImVec2& ViewOrigin() const { return m_View.Origin; }
// Returns scale of the view.
float ViewScale() const { return m_View.Scale; }
// Returns true if canvas is suspended.
//
// See: Suspend()/Resume()
bool IsSuspended() const { return m_SuspendCounter > 0; }
private:
# define IMGUI_EX_CANVAS_DEFERED() 0
# if IMGUI_EX_CANVAS_DEFERED()
struct Range
{
int BeginVertexIndex = 0;
int EndVertexIndex = 0;
int BeginComandIndex = 0;
int EndCommandIndex = 0;
};
# endif
void UpdateViewTransformPosition();
void SaveInputState();
void RestoreInputState();
void SaveViewportState();
void RestoreViewportState();
void EnterLocalSpace();
void LeaveLocalSpace();
bool m_InBeginEnd = false;
ImVec2 m_WidgetPosition;
ImVec2 m_WidgetSize;
ImRect m_WidgetRect;
ImDrawList* m_DrawList = nullptr;
int m_ExpectedChannel = 0;
# if IMGUI_EX_CANVAS_DEFERED()
ImVector<Range> m_Ranges;
Range* m_CurrentRange = nullptr;
# endif
int m_DrawListCommadBufferSize = 0;
int m_DrawListStartVertexIndex = 0;
CanvasView m_View;
ImRect m_ViewRect;
ImVec2 m_ViewTransformPosition;
int m_SuspendCounter = 0;
float m_LastFringeScale = 1.0f;
ImVec2 m_MousePosBackup;
ImVec2 m_MousePosPrevBackup;
ImVec2 m_MouseClickedPosBackup[IM_ARRAYSIZE(ImGuiIO::MouseClickedPos)];
ImVec2 m_WindowCursorMaxBackup;
# if defined(IMGUI_HAS_VIEWPORT)
ImVec2 m_WindowPosBackup;
ImVec2 m_ViewportPosBackup;
ImVec2 m_ViewportSizeBackup;
# if IMGUI_VERSION_NUM > 18002
ImVec2 m_ViewportWorkPosBackup;
ImVec2 m_ViewportWorkSizeBackup;
# else
ImVec2 m_ViewportWorkOffsetMinBackup;
ImVec2 m_ViewportWorkOffsetMaxBackup;
# endif
# endif
};
} // namespace ImGuiEx
# endif // __IMGUI_EX_CANVAS_H__

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//------------------------------------------------------------------------------
// VERSION 0.9.1
//
// LICENSE
// This software is dual-licensed to the public domain and under the following
// license: you are granted a perpetual, irrevocable license to copy, modify,
// publish, and distribute this file as you see fit.
//
// CREDITS
// Written by Michal Cichon
//------------------------------------------------------------------------------
# ifndef __IMGUI_EXTRA_MATH_H__
# define __IMGUI_EXTRA_MATH_H__
# pragma once
//------------------------------------------------------------------------------
# include <imgui.h>
# ifndef IMGUI_DEFINE_MATH_OPERATORS
# define IMGUI_DEFINE_MATH_OPERATORS
# endif
# include <imgui_internal.h>
//------------------------------------------------------------------------------
struct ImLine
{
ImVec2 A, B;
};
//------------------------------------------------------------------------------
inline bool operator==(const ImVec2& lhs, const ImVec2& rhs);
inline bool operator!=(const ImVec2& lhs, const ImVec2& rhs);
inline ImVec2 operator*(const float lhs, const ImVec2& rhs);
inline ImVec2 operator-(const ImVec2& lhs);
//------------------------------------------------------------------------------
inline float ImLength(float v);
inline float ImLength(const ImVec2& v);
inline float ImLengthSqr(float v);
inline ImVec2 ImNormalized(const ImVec2& v);
//------------------------------------------------------------------------------
inline bool ImRect_IsEmpty(const ImRect& rect);
inline ImVec2 ImRect_ClosestPoint(const ImRect& rect, const ImVec2& p, bool snap_to_edge);
inline ImVec2 ImRect_ClosestPoint(const ImRect& rect, const ImVec2& p, bool snap_to_edge, float radius);
inline ImVec2 ImRect_ClosestPoint(const ImRect& rect, const ImRect& b);
inline ImLine ImRect_ClosestLine(const ImRect& rect_a, const ImRect& rect_b);
inline ImLine ImRect_ClosestLine(const ImRect& rect_a, const ImRect& rect_b, float radius_a, float radius_b);
//------------------------------------------------------------------------------
namespace ImEasing {
template <typename V, typename T>
inline V EaseOutQuad(V b, V c, T t)
{
return b - c * (t * (t - 2));
}
} // namespace ImEasing
//------------------------------------------------------------------------------
# include "imgui_extra_math.inl"
//------------------------------------------------------------------------------
# endif // __IMGUI_EXTRA_MATH_H__

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//------------------------------------------------------------------------------
// VERSION 0.9.1
//
// LICENSE
// This software is dual-licensed to the public domain and under the following
// license: you are granted a perpetual, irrevocable license to copy, modify,
// publish, and distribute this file as you see fit.
//
// CREDITS
// Written by Michal Cichon
//------------------------------------------------------------------------------
# ifndef __IMGUI_EXTRA_MATH_INL__
# define __IMGUI_EXTRA_MATH_INL__
# pragma once
//------------------------------------------------------------------------------
# include "imgui_extra_math.h"
//------------------------------------------------------------------------------
inline bool operator==(const ImVec2& lhs, const ImVec2& rhs)
{
return lhs.x == rhs.x && lhs.y == rhs.y;
}
inline bool operator!=(const ImVec2& lhs, const ImVec2& rhs)
{
return lhs.x != rhs.x || lhs.y != rhs.y;
}
inline ImVec2 operator*(const float lhs, const ImVec2& rhs)
{
return ImVec2(lhs * rhs.x, lhs * rhs.y);
}
inline ImVec2 operator-(const ImVec2& lhs)
{
return ImVec2(-lhs.x, -lhs.y);
}
//------------------------------------------------------------------------------
inline float ImLength(float v)
{
return v;
}
inline float ImLength(const ImVec2& v)
{
return ImSqrt(ImLengthSqr(v));
}
inline float ImLengthSqr(float v)
{
return v * v;
}
inline ImVec2 ImNormalized(const ImVec2& v)
{
return v * ImInvLength(v, 0.0f);
}
//------------------------------------------------------------------------------
inline bool ImRect_IsEmpty(const ImRect& rect)
{
return rect.Min.x >= rect.Max.x
|| rect.Min.y >= rect.Max.y;
}
inline ImVec2 ImRect_ClosestPoint(const ImRect& rect, const ImVec2& p, bool snap_to_edge)
{
if (!snap_to_edge && rect.Contains(p))
return p;
return ImVec2(
(p.x > rect.Max.x) ? rect.Max.x : (p.x < rect.Min.x ? rect.Min.x : p.x),
(p.y > rect.Max.y) ? rect.Max.y : (p.y < rect.Min.y ? rect.Min.y : p.y)
);
}
inline ImVec2 ImRect_ClosestPoint(const ImRect& rect, const ImVec2& p, bool snap_to_edge, float radius)
{
auto point = ImRect_ClosestPoint(rect, p, snap_to_edge);
const auto offset = p - point;
const auto distance_sq = offset.x * offset.x + offset.y * offset.y;
if (distance_sq <= 0)
return point;
const auto distance = ImSqrt(distance_sq);
return point + offset * (ImMin(distance, radius) * (1.0f / distance));
}
inline ImVec2 ImRect_ClosestPoint(const ImRect& rect, const ImRect& other)
{
ImVec2 result;
if (other.Min.x >= rect.Max.x)
result.x = rect.Max.x;
else if (other.Max.x <= rect.Min.x)
result.x = rect.Min.x;
else
result.x = (ImMax(rect.Min.x, other.Min.x) + ImMin(rect.Max.x, other.Max.x)) / 2;
if (other.Min.y >= rect.Max.y)
result.y = rect.Max.y;
else if (other.Max.y <= rect.Min.y)
result.y = rect.Min.y;
else
result.y = (ImMax(rect.Min.y, other.Min.y) + ImMin(rect.Max.y, other.Max.y)) / 2;
return result;
}
inline ImLine ImRect_ClosestLine(const ImRect& rect_a, const ImRect& rect_b)
{
ImLine result;
result.A = ImRect_ClosestPoint(rect_a, rect_b);
result.B = ImRect_ClosestPoint(rect_b, rect_a);
auto distribute = [](float& a, float& b, float a0, float a1, float b0, float b1)
{
if (a0 >= b1 || a1 <= b0)
return;
const auto aw = a1 - a0;
const auto bw = b1 - b0;
if (aw > bw)
{
b = b0 + bw - bw * (a - a0) / aw;
a = b;
}
else if (aw < bw)
{
a = a0 + aw - aw * (b - b0) / bw;
b = a;
}
};
distribute(result.A.x, result.B.x, rect_a.Min.x, rect_a.Max.x, rect_b.Min.x, rect_b.Max.x);
distribute(result.A.y, result.B.y, rect_a.Min.y, rect_a.Max.y, rect_b.Min.y, rect_b.Max.y);
return result;
}
inline ImLine ImRect_ClosestLine(const ImRect& rect_a, const ImRect& rect_b, float radius_a, float radius_b)
{
auto line = ImRect_ClosestLine(rect_a, rect_b);
if (radius_a < 0)
radius_a = 0;
if (radius_b < 0)
radius_b = 0;
if (radius_a == 0 && radius_b == 0)
return line;
const auto offset = line.B - line.A;
const auto length_sq = offset.x * offset.x + offset.y * offset.y;
const auto radius_a_sq = radius_a * radius_a;
const auto radius_b_sq = radius_b * radius_b;
if (length_sq <= 0)
return line;
const auto length = ImSqrt(length_sq);
const auto direction = ImVec2(offset.x / length, offset.y / length);
const auto total_radius_sq = radius_a_sq + radius_b_sq;
if (total_radius_sq > length_sq)
{
const auto scale = length / (radius_a + radius_b);
radius_a *= scale;
radius_b *= scale;
}
line.A = line.A + (direction * radius_a);
line.B = line.B - (direction * radius_b);
return line;
}
//------------------------------------------------------------------------------
# endif // __IMGUI_EXTRA_MATH_INL__

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//------------------------------------------------------------------------------
// VERSION 0.9.1
//
// LICENSE
// This software is dual-licensed to the public domain and under the following
// license: you are granted a perpetual, irrevocable license to copy, modify,
// publish, and distribute this file as you see fit.
//
// CREDITS
// Written by Michal Cichon
//------------------------------------------------------------------------------
# ifndef __IMGUI_NODE_EDITOR_H__
# define __IMGUI_NODE_EDITOR_H__
# pragma once
//------------------------------------------------------------------------------
#define IMGUI_DEFINE_MATH_OPERATORS
# include <imgui.h>
# include <cstdint> // std::uintXX_t
# include <utility> // std::move
//------------------------------------------------------------------------------
# define IMGUI_NODE_EDITOR_VERSION "0.9.2"
# define IMGUI_NODE_EDITOR_VERSION_NUM 000902
//------------------------------------------------------------------------------
namespace ax {
namespace NodeEditor {
//------------------------------------------------------------------------------
struct NodeId;
struct LinkId;
struct PinId;
//------------------------------------------------------------------------------
enum class PinKind
{
Input,
Output
};
enum class FlowDirection
{
Forward,
Backward
};
enum class CanvasSizeMode
{
FitVerticalView, // Previous view will be scaled to fit new view on Y axis
FitHorizontalView, // Previous view will be scaled to fit new view on X axis
CenterOnly, // Previous view will be centered on new view
};
//------------------------------------------------------------------------------
enum class SaveReasonFlags: uint32_t
{
None = 0x00000000,
Navigation = 0x00000001,
Position = 0x00000002,
Size = 0x00000004,
Selection = 0x00000008,
AddNode = 0x00000010,
RemoveNode = 0x00000020,
User = 0x00000040
};
inline SaveReasonFlags operator |(SaveReasonFlags lhs, SaveReasonFlags rhs) { return static_cast<SaveReasonFlags>(static_cast<uint32_t>(lhs) | static_cast<uint32_t>(rhs)); }
inline SaveReasonFlags operator &(SaveReasonFlags lhs, SaveReasonFlags rhs) { return static_cast<SaveReasonFlags>(static_cast<uint32_t>(lhs) & static_cast<uint32_t>(rhs)); }
using ConfigSaveSettings = bool (*)(const char* data, size_t size, SaveReasonFlags reason, void* userPointer);
using ConfigLoadSettings = size_t (*)(char* data, void* userPointer);
using ConfigSaveNodeSettings = bool (*)(NodeId nodeId, const char* data, size_t size, SaveReasonFlags reason, void* userPointer);
using ConfigLoadNodeSettings = size_t (*)(NodeId nodeId, char* data, void* userPointer);
using ConfigSession = void (*)(void* userPointer);
struct Config
{
using CanvasSizeModeAlias = ax::NodeEditor::CanvasSizeMode;
const char* SettingsFile;
ConfigSession BeginSaveSession;
ConfigSession EndSaveSession;
ConfigSaveSettings SaveSettings;
ConfigLoadSettings LoadSettings;
ConfigSaveNodeSettings SaveNodeSettings;
ConfigLoadNodeSettings LoadNodeSettings;
void* UserPointer;
ImVector<float> CustomZoomLevels;
CanvasSizeModeAlias CanvasSizeMode;
int DragButtonIndex; // Mouse button index drag action will react to (0-left, 1-right, 2-middle)
int SelectButtonIndex; // Mouse button index select action will react to (0-left, 1-right, 2-middle)
int NavigateButtonIndex; // Mouse button index navigate action will react to (0-left, 1-right, 2-middle)
int ContextMenuButtonIndex; // Mouse button index context menu action will react to (0-left, 1-right, 2-middle)
Config()
: SettingsFile("NodeEditor.json")
, BeginSaveSession(nullptr)
, EndSaveSession(nullptr)
, SaveSettings(nullptr)
, LoadSettings(nullptr)
, SaveNodeSettings(nullptr)
, LoadNodeSettings(nullptr)
, UserPointer(nullptr)
, CustomZoomLevels()
, CanvasSizeMode(CanvasSizeModeAlias::FitVerticalView)
, DragButtonIndex(0)
, SelectButtonIndex(0)
, NavigateButtonIndex(1)
, ContextMenuButtonIndex(1)
{
}
};
//------------------------------------------------------------------------------
enum StyleColor
{
StyleColor_Bg,
StyleColor_Grid,
StyleColor_NodeBg,
StyleColor_NodeBorder,
StyleColor_HovNodeBorder,
StyleColor_SelNodeBorder,
StyleColor_NodeSelRect,
StyleColor_NodeSelRectBorder,
StyleColor_HovLinkBorder,
StyleColor_SelLinkBorder,
StyleColor_HighlightLinkBorder,
StyleColor_LinkSelRect,
StyleColor_LinkSelRectBorder,
StyleColor_PinRect,
StyleColor_PinRectBorder,
StyleColor_Flow,
StyleColor_FlowMarker,
StyleColor_GroupBg,
StyleColor_GroupBorder,
StyleColor_Count
};
enum StyleVar
{
StyleVar_NodePadding,
StyleVar_NodeRounding,
StyleVar_NodeBorderWidth,
StyleVar_HoveredNodeBorderWidth,
StyleVar_SelectedNodeBorderWidth,
StyleVar_PinRounding,
StyleVar_PinBorderWidth,
StyleVar_LinkStrength,
StyleVar_SourceDirection,
StyleVar_TargetDirection,
StyleVar_ScrollDuration,
StyleVar_FlowMarkerDistance,
StyleVar_FlowSpeed,
StyleVar_FlowDuration,
StyleVar_PivotAlignment,
StyleVar_PivotSize,
StyleVar_PivotScale,
StyleVar_PinCorners,
StyleVar_PinRadius,
StyleVar_PinArrowSize,
StyleVar_PinArrowWidth,
StyleVar_GroupRounding,
StyleVar_GroupBorderWidth,
StyleVar_HighlightConnectedLinks,
StyleVar_SnapLinkToPinDir,
StyleVar_Count
};
struct Style
{
ImVec4 NodePadding;
float NodeRounding;
float NodeBorderWidth;
float HoveredNodeBorderWidth;
float SelectedNodeBorderWidth;
float PinRounding;
float PinBorderWidth;
float LinkStrength;
ImVec2 SourceDirection;
ImVec2 TargetDirection;
float ScrollDuration;
float FlowMarkerDistance;
float FlowSpeed;
float FlowDuration;
ImVec2 PivotAlignment;
ImVec2 PivotSize;
ImVec2 PivotScale;
float PinCorners;
float PinRadius;
float PinArrowSize;
float PinArrowWidth;
float GroupRounding;
float GroupBorderWidth;
float HighlightConnectedLinks;
float SnapLinkToPinDir; // when true link will start on the line defined by pin direction
ImVec4 Colors[StyleColor_Count];
Style()
{
NodePadding = ImVec4(8, 8, 8, 8);
NodeRounding = 12.0f;
NodeBorderWidth = 1.5f;
HoveredNodeBorderWidth = 3.5f;
SelectedNodeBorderWidth = 3.5f;
PinRounding = 4.0f;
PinBorderWidth = 0.0f;
LinkStrength = 100.0f;
SourceDirection = ImVec2(1.0f, 0.0f);
TargetDirection = ImVec2(-1.0f, 0.0f);
ScrollDuration = 0.35f;
FlowMarkerDistance = 30.0f;
FlowSpeed = 150.0f;
FlowDuration = 2.0f;
PivotAlignment = ImVec2(0.5f, 0.5f);
PivotSize = ImVec2(0.0f, 0.0f);
PivotScale = ImVec2(1, 1);
#if IMGUI_VERSION_NUM > 18101
PinCorners = ImDrawFlags_RoundCornersAll;
#else
PinCorners = ImDrawCornerFlags_All;
#endif
PinRadius = 0.0f;
PinArrowSize = 0.0f;
PinArrowWidth = 0.0f;
GroupRounding = 6.0f;
GroupBorderWidth = 1.0f;
HighlightConnectedLinks = 0.0f;
SnapLinkToPinDir = 0.0f;
Colors[StyleColor_Bg] = ImColor( 60, 60, 70, 200);
Colors[StyleColor_Grid] = ImColor(120, 120, 120, 40);
Colors[StyleColor_NodeBg] = ImColor( 32, 32, 32, 200);
Colors[StyleColor_NodeBorder] = ImColor(255, 255, 255, 96);
Colors[StyleColor_HovNodeBorder] = ImColor( 50, 176, 255, 255);
Colors[StyleColor_SelNodeBorder] = ImColor(255, 176, 50, 255);
Colors[StyleColor_NodeSelRect] = ImColor( 5, 130, 255, 64);
Colors[StyleColor_NodeSelRectBorder] = ImColor( 5, 130, 255, 128);
Colors[StyleColor_HovLinkBorder] = ImColor( 50, 176, 255, 255);
Colors[StyleColor_SelLinkBorder] = ImColor(255, 176, 50, 255);
Colors[StyleColor_HighlightLinkBorder]= ImColor(204, 105, 0, 255);
Colors[StyleColor_LinkSelRect] = ImColor( 5, 130, 255, 64);
Colors[StyleColor_LinkSelRectBorder] = ImColor( 5, 130, 255, 128);
Colors[StyleColor_PinRect] = ImColor( 60, 180, 255, 100);
Colors[StyleColor_PinRectBorder] = ImColor( 60, 180, 255, 128);
Colors[StyleColor_Flow] = ImColor(255, 128, 64, 255);
Colors[StyleColor_FlowMarker] = ImColor(255, 128, 64, 255);
Colors[StyleColor_GroupBg] = ImColor( 0, 0, 0, 160);
Colors[StyleColor_GroupBorder] = ImColor(255, 255, 255, 32);
}
};
//------------------------------------------------------------------------------
struct EditorContext;
//------------------------------------------------------------------------------
void SetCurrentEditor(EditorContext* ctx);
EditorContext* GetCurrentEditor();
EditorContext* CreateEditor(const Config* config = nullptr);
void DestroyEditor(EditorContext* ctx);
const Config& GetConfig(EditorContext* ctx = nullptr);
Style& GetStyle();
const char* GetStyleColorName(StyleColor colorIndex);
void PushStyleColor(StyleColor colorIndex, const ImVec4& color);
void PopStyleColor(int count = 1);
void PushStyleVar(StyleVar varIndex, float value);
void PushStyleVar(StyleVar varIndex, const ImVec2& value);
void PushStyleVar(StyleVar varIndex, const ImVec4& value);
void PopStyleVar(int count = 1);
void Begin(const char* id, const ImVec2& size = ImVec2(0, 0));
void End();
void BeginNode(NodeId id);
void BeginPin(PinId id, PinKind kind);
void PinRect(const ImVec2& a, const ImVec2& b);
void PinPivotRect(const ImVec2& a, const ImVec2& b);
void PinPivotSize(const ImVec2& size);
void PinPivotScale(const ImVec2& scale);
void PinPivotAlignment(const ImVec2& alignment);
void EndPin();
void Group(const ImVec2& size);
void EndNode();
bool BeginGroupHint(NodeId nodeId);
ImVec2 GetGroupMin();
ImVec2 GetGroupMax();
ImDrawList* GetHintForegroundDrawList();
ImDrawList* GetHintBackgroundDrawList();
void EndGroupHint();
// TODO: Add a way to manage node background channels
ImDrawList* GetNodeBackgroundDrawList(NodeId nodeId);
bool Link(LinkId id, PinId startPinId, PinId endPinId, const ImVec4& color = ImVec4(1, 1, 1, 1), float thickness = 1.0f);
void Flow(LinkId linkId, FlowDirection direction = FlowDirection::Forward);
bool BeginCreate(const ImVec4& color = ImVec4(1, 1, 1, 1), float thickness = 1.0f);
bool QueryNewLink(PinId* startId, PinId* endId);
bool QueryNewLink(PinId* startId, PinId* endId, const ImVec4& color, float thickness = 1.0f);
bool QueryNewNode(PinId* pinId);
bool QueryNewNode(PinId* pinId, const ImVec4& color, float thickness = 1.0f);
bool AcceptNewItem();
bool AcceptNewItem(const ImVec4& color, float thickness = 1.0f);
void RejectNewItem();
void RejectNewItem(const ImVec4& color, float thickness = 1.0f);
void EndCreate();
bool BeginDelete();
bool QueryDeletedLink(LinkId* linkId, PinId* startId = nullptr, PinId* endId = nullptr);
bool QueryDeletedNode(NodeId* nodeId);
bool AcceptDeletedItem(bool deleteDependencies = true);
void RejectDeletedItem();
void EndDelete();
void SetNodePosition(NodeId nodeId, const ImVec2& editorPosition);
void SetGroupSize(NodeId nodeId, const ImVec2& size);
ImVec2 GetNodePosition(NodeId nodeId);
ImVec2 GetNodeSize(NodeId nodeId);
void CenterNodeOnScreen(NodeId nodeId);
void SetNodeZPosition(NodeId nodeId, float z); // Sets node z position, nodes with higher value are drawn over nodes with lower value
float GetNodeZPosition(NodeId nodeId); // Returns node z position, defaults is 0.0f
void RestoreNodeState(NodeId nodeId);
void Suspend();
void Resume();
bool IsSuspended();
bool IsActive();
bool HasSelectionChanged();
int GetSelectedObjectCount();
int GetSelectedNodes(NodeId* nodes, int size);
int GetSelectedLinks(LinkId* links, int size);
bool IsNodeSelected(NodeId nodeId);
bool IsLinkSelected(LinkId linkId);
void ClearSelection();
void SelectNode(NodeId nodeId, bool append = false);
void SelectLink(LinkId linkId, bool append = false);
void DeselectNode(NodeId nodeId);
void DeselectLink(LinkId linkId);
bool DeleteNode(NodeId nodeId);
bool DeleteLink(LinkId linkId);
bool HasAnyLinks(NodeId nodeId); // Returns true if node has any link connected
bool HasAnyLinks(PinId pinId); // Return true if pin has any link connected
int BreakLinks(NodeId nodeId); // Break all links connected to this node
int BreakLinks(PinId pinId); // Break all links connected to this pin
void NavigateToContent(float duration = -1);
void NavigateToSelection(bool zoomIn = false, float duration = -1);
bool ShowNodeContextMenu(NodeId* nodeId);
bool ShowPinContextMenu(PinId* pinId);
bool ShowLinkContextMenu(LinkId* linkId);
bool ShowBackgroundContextMenu();
void EnableShortcuts(bool enable);
bool AreShortcutsEnabled();
bool BeginShortcut();
bool AcceptCut();
bool AcceptCopy();
bool AcceptPaste();
bool AcceptDuplicate();
bool AcceptCreateNode();
int GetActionContextSize();
int GetActionContextNodes(NodeId* nodes, int size);
int GetActionContextLinks(LinkId* links, int size);
void EndShortcut();
float GetCurrentZoom();
NodeId GetHoveredNode();
PinId GetHoveredPin();
LinkId GetHoveredLink();
NodeId GetDoubleClickedNode();
PinId GetDoubleClickedPin();
LinkId GetDoubleClickedLink();
bool IsBackgroundClicked();
bool IsBackgroundDoubleClicked();
ImGuiMouseButton GetBackgroundClickButtonIndex(); // -1 if none
ImGuiMouseButton GetBackgroundDoubleClickButtonIndex(); // -1 if none
bool GetLinkPins(LinkId linkId, PinId* startPinId, PinId* endPinId); // pass nullptr if particular pin do not interest you
bool PinHadAnyLinks(PinId pinId);
ImVec2 GetScreenSize();
ImVec2 ScreenToCanvas(const ImVec2& pos);
ImVec2 CanvasToScreen(const ImVec2& pos);
int GetNodeCount(); // Returns number of submitted nodes since Begin() call
int GetOrderedNodeIds(NodeId* nodes, int size); // Fills an array with node id's in order they're drawn; up to 'size` elements are set. Returns actual size of filled id's.
//------------------------------------------------------------------------------
namespace Details {
template <typename T, typename Tag>
struct SafeType
{
SafeType(T t)
: m_Value(std::move(t))
{
}
SafeType(const SafeType&) = default;
template <typename T2, typename Tag2>
SafeType(
const SafeType
<
typename std::enable_if<!std::is_same<T, T2>::value, T2>::type,
typename std::enable_if<!std::is_same<Tag, Tag2>::value, Tag2>::type
>&) = delete;
SafeType& operator=(const SafeType&) = default;
explicit operator T() const { return Get(); }
T Get() const { return m_Value; }
private:
T m_Value;
};
template <typename Tag>
struct SafePointerType
: SafeType<uintptr_t, Tag>
{
static const Tag Invalid;
using SafeType<uintptr_t, Tag>::SafeType;
SafePointerType()
: SafePointerType(Invalid)
{
}
template <typename T = void> explicit SafePointerType(T* ptr): SafePointerType(reinterpret_cast<uintptr_t>(ptr)) {}
template <typename T = void> T* AsPointer() const { return reinterpret_cast<T*>(this->Get()); }
explicit operator bool() const { return *this != Invalid; }
};
template <typename Tag>
const Tag SafePointerType<Tag>::Invalid = { 0 };
template <typename Tag>
inline bool operator==(const SafePointerType<Tag>& lhs, const SafePointerType<Tag>& rhs)
{
return lhs.Get() == rhs.Get();
}
template <typename Tag>
inline bool operator!=(const SafePointerType<Tag>& lhs, const SafePointerType<Tag>& rhs)
{
return lhs.Get() != rhs.Get();
}
} // namespace Details
struct NodeId final: Details::SafePointerType<NodeId>
{
using SafePointerType::SafePointerType;
};
struct LinkId final: Details::SafePointerType<LinkId>
{
using SafePointerType::SafePointerType;
};
struct PinId final: Details::SafePointerType<PinId>
{
using SafePointerType::SafePointerType;
};
//------------------------------------------------------------------------------
} // namespace Editor
} // namespace ax
//------------------------------------------------------------------------------
# endif // __IMGUI_NODE_EDITOR_H__

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//Disable a bunch of warnings for now
#ifndef _MSC_VER
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wshadow"
#pragma GCC diagnostic ignored "-Wunused-parameter"
#endif
//------------------------------------------------------------------------------
// VERSION 0.9.1
//
// LICENSE
// This software is dual-licensed to the public domain and under the following
// license: you are granted a perpetual, irrevocable license to copy, modify,
// publish, and distribute this file as you see fit.
//
// CREDITS
// Written by Michal Cichon
//------------------------------------------------------------------------------
# include "imgui_node_editor_internal.h"
# include <algorithm>
//------------------------------------------------------------------------------
static ax::NodeEditor::Detail::EditorContext* s_Editor = nullptr;
//------------------------------------------------------------------------------
template <typename C, typename I, typename F>
static int BuildIdList(C& container, I* list, int listSize, F&& accept)
{
if (list != nullptr)
{
int count = 0;
for (auto object : container)
{
if (listSize <= 0)
break;
if (accept(object))
{
list[count] = I(object->ID().AsPointer());
++count;
--listSize;}
}
return count;
}
else
return static_cast<int>(std::count_if(container.begin(), container.end(), accept));
}
//------------------------------------------------------------------------------
ax::NodeEditor::EditorContext* ax::NodeEditor::CreateEditor(const Config* config)
{
return reinterpret_cast<ax::NodeEditor::EditorContext*>(new ax::NodeEditor::Detail::EditorContext(config));
}
void ax::NodeEditor::DestroyEditor(EditorContext* ctx)
{
auto lastContext = GetCurrentEditor();
// Set context we're about to destroy as current, to give callback valid context
if (lastContext != ctx)
SetCurrentEditor(ctx);
auto editor = reinterpret_cast<ax::NodeEditor::Detail::EditorContext*>(ctx);
delete editor;
if (lastContext != ctx)
SetCurrentEditor(lastContext);
}
const ax::NodeEditor::Config& ax::NodeEditor::GetConfig(EditorContext* ctx)
{
if (ctx == nullptr)
ctx = GetCurrentEditor();
if (ctx)
{
auto editor = reinterpret_cast<ax::NodeEditor::Detail::EditorContext*>(ctx);
return editor->GetConfig();
}
else
{
static Config s_EmptyConfig;
return s_EmptyConfig;
}
}
void ax::NodeEditor::SetCurrentEditor(EditorContext* ctx)
{
s_Editor = reinterpret_cast<ax::NodeEditor::Detail::EditorContext*>(ctx);
}
ax::NodeEditor::EditorContext* ax::NodeEditor::GetCurrentEditor()
{
return reinterpret_cast<ax::NodeEditor::EditorContext*>(s_Editor);
}
ax::NodeEditor::Style& ax::NodeEditor::GetStyle()
{
return s_Editor->GetStyle();
}
const char* ax::NodeEditor::GetStyleColorName(StyleColor colorIndex)
{
return s_Editor->GetStyle().GetColorName(colorIndex);
}
void ax::NodeEditor::PushStyleColor(StyleColor colorIndex, const ImVec4& color)
{
s_Editor->GetStyle().PushColor(colorIndex, color);
}
void ax::NodeEditor::PopStyleColor(int count)
{
s_Editor->GetStyle().PopColor(count);
}
void ax::NodeEditor::PushStyleVar(StyleVar varIndex, float value)
{
s_Editor->GetStyle().PushVar(varIndex, value);
}
void ax::NodeEditor::PushStyleVar(StyleVar varIndex, const ImVec2& value)
{
s_Editor->GetStyle().PushVar(varIndex, value);
}
void ax::NodeEditor::PushStyleVar(StyleVar varIndex, const ImVec4& value)
{
s_Editor->GetStyle().PushVar(varIndex, value);
}
void ax::NodeEditor::PopStyleVar(int count)
{
s_Editor->GetStyle().PopVar(count);
}
void ax::NodeEditor::Begin(const char* id, const ImVec2& size)
{
s_Editor->Begin(id, size);
}
void ax::NodeEditor::End()
{
s_Editor->End();
}
void ax::NodeEditor::BeginNode(NodeId id)
{
s_Editor->GetNodeBuilder().Begin(id);
}
void ax::NodeEditor::BeginPin(PinId id, PinKind kind)
{
s_Editor->GetNodeBuilder().BeginPin(id, kind);
}
void ax::NodeEditor::PinRect(const ImVec2& a, const ImVec2& b)
{
s_Editor->GetNodeBuilder().PinRect(a, b);
}
void ax::NodeEditor::PinPivotRect(const ImVec2& a, const ImVec2& b)
{
s_Editor->GetNodeBuilder().PinPivotRect(a, b);
}
void ax::NodeEditor::PinPivotSize(const ImVec2& size)
{
s_Editor->GetNodeBuilder().PinPivotSize(size);
}
void ax::NodeEditor::PinPivotScale(const ImVec2& scale)
{
s_Editor->GetNodeBuilder().PinPivotScale(scale);
}
void ax::NodeEditor::PinPivotAlignment(const ImVec2& alignment)
{
s_Editor->GetNodeBuilder().PinPivotAlignment(alignment);
}
void ax::NodeEditor::EndPin()
{
s_Editor->GetNodeBuilder().EndPin();
}
void ax::NodeEditor::Group(const ImVec2& size)
{
s_Editor->GetNodeBuilder().Group(size);
}
void ax::NodeEditor::EndNode()
{
s_Editor->GetNodeBuilder().End();
}
bool ax::NodeEditor::BeginGroupHint(NodeId nodeId)
{
return s_Editor->GetHintBuilder().Begin(nodeId);
}
ImVec2 ax::NodeEditor::GetGroupMin()
{
return s_Editor->GetHintBuilder().GetGroupMin();
}
ImVec2 ax::NodeEditor::GetGroupMax()
{
return s_Editor->GetHintBuilder().GetGroupMax();
}
ImDrawList* ax::NodeEditor::GetHintForegroundDrawList()
{
return s_Editor->GetHintBuilder().GetForegroundDrawList();
}
ImDrawList* ax::NodeEditor::GetHintBackgroundDrawList()
{
return s_Editor->GetHintBuilder().GetBackgroundDrawList();
}
void ax::NodeEditor::EndGroupHint()
{
s_Editor->GetHintBuilder().End();
}
ImDrawList* ax::NodeEditor::GetNodeBackgroundDrawList(NodeId nodeId)
{
if (auto node = s_Editor->FindNode(nodeId))
return s_Editor->GetNodeBuilder().GetUserBackgroundDrawList(node);
else
return nullptr;
}
bool ax::NodeEditor::Link(LinkId id, PinId startPinId, PinId endPinId, const ImVec4& color/* = ImVec4(1, 1, 1, 1)*/, float thickness/* = 1.0f*/)
{
return s_Editor->DoLink(id, startPinId, endPinId, ImColor(color), thickness);
}
void ax::NodeEditor::Flow(LinkId linkId, FlowDirection direction)
{
if (auto link = s_Editor->FindLink(linkId))
s_Editor->Flow(link, direction);
}
bool ax::NodeEditor::BeginCreate(const ImVec4& color, float thickness)
{
auto& context = s_Editor->GetItemCreator();
if (context.Begin())
{
context.SetStyle(ImColor(color), thickness);
return true;
}
else
return false;
}
bool ax::NodeEditor::QueryNewLink(PinId* startId, PinId* endId)
{
using Result = ax::NodeEditor::Detail::CreateItemAction::Result;
auto& context = s_Editor->GetItemCreator();
return context.QueryLink(startId, endId) == Result::True;
}
bool ax::NodeEditor::QueryNewLink(PinId* startId, PinId* endId, const ImVec4& color, float thickness)
{
using Result = ax::NodeEditor::Detail::CreateItemAction::Result;
auto& context = s_Editor->GetItemCreator();
auto result = context.QueryLink(startId, endId);
if (result != Result::Indeterminate)
context.SetStyle(ImColor(color), thickness);
return result == Result::True;
}
bool ax::NodeEditor::QueryNewNode(PinId* pinId)
{
using Result = ax::NodeEditor::Detail::CreateItemAction::Result;
auto& context = s_Editor->GetItemCreator();
return context.QueryNode(pinId) == Result::True;
}
bool ax::NodeEditor::QueryNewNode(PinId* pinId, const ImVec4& color, float thickness)
{
using Result = ax::NodeEditor::Detail::CreateItemAction::Result;
auto& context = s_Editor->GetItemCreator();
auto result = context.QueryNode(pinId);
if (result != Result::Indeterminate)
context.SetStyle(ImColor(color), thickness);
return result == Result::True;
}
bool ax::NodeEditor::AcceptNewItem()
{
using Result = ax::NodeEditor::Detail::CreateItemAction::Result;
auto& context = s_Editor->GetItemCreator();
return context.AcceptItem() == Result::True;
}
bool ax::NodeEditor::AcceptNewItem(const ImVec4& color, float thickness)
{
using Result = ax::NodeEditor::Detail::CreateItemAction::Result;
auto& context = s_Editor->GetItemCreator();
auto result = context.AcceptItem();
if (result != Result::Indeterminate)
context.SetStyle(ImColor(color), thickness);
return result == Result::True;
}
void ax::NodeEditor::RejectNewItem()
{
auto& context = s_Editor->GetItemCreator();
context.RejectItem();
}
void ax::NodeEditor::RejectNewItem(const ImVec4& color, float thickness)
{
using Result = ax::NodeEditor::Detail::CreateItemAction::Result;
auto& context = s_Editor->GetItemCreator();
if (context.RejectItem() != Result::Indeterminate)
context.SetStyle(ImColor(color), thickness);
}
void ax::NodeEditor::EndCreate()
{
auto& context = s_Editor->GetItemCreator();
context.End();
}
bool ax::NodeEditor::BeginDelete()
{
auto& context = s_Editor->GetItemDeleter();
return context.Begin();
}
bool ax::NodeEditor::QueryDeletedLink(LinkId* linkId, PinId* startId, PinId* endId)
{
auto& context = s_Editor->GetItemDeleter();
return context.QueryLink(linkId, startId, endId);
}
bool ax::NodeEditor::QueryDeletedNode(NodeId* nodeId)
{
auto& context = s_Editor->GetItemDeleter();
return context.QueryNode(nodeId);
}
bool ax::NodeEditor::AcceptDeletedItem(bool deleteDependencies)
{
auto& context = s_Editor->GetItemDeleter();
return context.AcceptItem(deleteDependencies);
}
void ax::NodeEditor::RejectDeletedItem()
{
auto& context = s_Editor->GetItemDeleter();
context.RejectItem();
}
void ax::NodeEditor::EndDelete()
{
auto& context = s_Editor->GetItemDeleter();
context.End();
}
void ax::NodeEditor::SetNodePosition(NodeId nodeId, const ImVec2& position)
{
s_Editor->SetNodePosition(nodeId, position);
}
void ax::NodeEditor::SetGroupSize(NodeId nodeId, const ImVec2& size)
{
s_Editor->SetGroupSize(nodeId, size);
}
ImVec2 ax::NodeEditor::GetNodePosition(NodeId nodeId)
{
return s_Editor->GetNodePosition(nodeId);
}
ImVec2 ax::NodeEditor::GetNodeSize(NodeId nodeId)
{
return s_Editor->GetNodeSize(nodeId);
}
void ax::NodeEditor::CenterNodeOnScreen(NodeId nodeId)
{
if (auto node = s_Editor->FindNode(nodeId))
node->CenterOnScreenInNextFrame();
}
void ax::NodeEditor::SetNodeZPosition(NodeId nodeId, float z)
{
s_Editor->SetNodeZPosition(nodeId, z);
}
float ax::NodeEditor::GetNodeZPosition(NodeId nodeId)
{
return s_Editor->GetNodeZPosition(nodeId);
}
void ax::NodeEditor::RestoreNodeState(NodeId nodeId)
{
if (auto node = s_Editor->FindNode(nodeId))
s_Editor->MarkNodeToRestoreState(node);
}
void ax::NodeEditor::Suspend()
{
s_Editor->Suspend();
}
void ax::NodeEditor::Resume()
{
s_Editor->Resume();
}
bool ax::NodeEditor::IsSuspended()
{
return s_Editor->IsSuspended();
}
bool ax::NodeEditor::IsActive()
{
return s_Editor->IsFocused();
}
bool ax::NodeEditor::HasSelectionChanged()
{
return s_Editor->HasSelectionChanged();
}
int ax::NodeEditor::GetSelectedObjectCount()
{
return (int)s_Editor->GetSelectedObjects().size();
}
int ax::NodeEditor::GetSelectedNodes(NodeId* nodes, int size)
{
return BuildIdList(s_Editor->GetSelectedObjects(), nodes, size, [](auto object)
{
return object->AsNode() != nullptr;
});
}
int ax::NodeEditor::GetSelectedLinks(LinkId* links, int size)
{
return BuildIdList(s_Editor->GetSelectedObjects(), links, size, [](auto object)
{
return object->AsLink() != nullptr;
});
}
bool ax::NodeEditor::IsNodeSelected(NodeId nodeId)
{
if (auto node = s_Editor->FindNode(nodeId))
return s_Editor->IsSelected(node);
else
return false;
}
bool ax::NodeEditor::IsLinkSelected(LinkId linkId)
{
if (auto link = s_Editor->FindLink(linkId))
return s_Editor->IsSelected(link);
else
return false;
}
void ax::NodeEditor::ClearSelection()
{
s_Editor->ClearSelection();
}
void ax::NodeEditor::SelectNode(NodeId nodeId, bool append)
{
if (auto node = s_Editor->FindNode(nodeId))
{
if (append)
s_Editor->SelectObject(node);
else
s_Editor->SetSelectedObject(node);
}
}
void ax::NodeEditor::SelectLink(LinkId linkId, bool append)
{
if (auto link = s_Editor->FindLink(linkId))
{
if (append)
s_Editor->SelectObject(link);
else
s_Editor->SetSelectedObject(link);
}
}
void ax::NodeEditor::DeselectNode(NodeId nodeId)
{
if (auto node = s_Editor->FindNode(nodeId))
s_Editor->DeselectObject(node);
}
void ax::NodeEditor::DeselectLink(LinkId linkId)
{
if (auto link = s_Editor->FindLink(linkId))
s_Editor->DeselectObject(link);
}
bool ax::NodeEditor::DeleteNode(NodeId nodeId)
{
if (auto node = s_Editor->FindNode(nodeId))
return s_Editor->GetItemDeleter().Add(node);
else
return false;
}
bool ax::NodeEditor::DeleteLink(LinkId linkId)
{
if (auto link = s_Editor->FindLink(linkId))
return s_Editor->GetItemDeleter().Add(link);
else
return false;
}
bool ax::NodeEditor::HasAnyLinks(NodeId nodeId)
{
return s_Editor->HasAnyLinks(nodeId);
}
bool ax::NodeEditor::HasAnyLinks(PinId pinId)
{
return s_Editor->HasAnyLinks(pinId);
}
int ax::NodeEditor::BreakLinks(NodeId nodeId)
{
return s_Editor->BreakLinks(nodeId);
}
int ax::NodeEditor::BreakLinks(PinId pinId)
{
return s_Editor->BreakLinks(pinId);
}
void ax::NodeEditor::NavigateToContent(float duration)
{
s_Editor->NavigateTo(s_Editor->GetContentBounds(), true, duration);
}
void ax::NodeEditor::NavigateToSelection(bool zoomIn, float duration)
{
s_Editor->NavigateTo(s_Editor->GetSelectionBounds(), zoomIn, duration);
}
bool ax::NodeEditor::ShowNodeContextMenu(NodeId* nodeId)
{
return s_Editor->GetContextMenu().ShowNodeContextMenu(nodeId);
}
bool ax::NodeEditor::ShowPinContextMenu(PinId* pinId)
{
return s_Editor->GetContextMenu().ShowPinContextMenu(pinId);
}
bool ax::NodeEditor::ShowLinkContextMenu(LinkId* linkId)
{
return s_Editor->GetContextMenu().ShowLinkContextMenu(linkId);
}
bool ax::NodeEditor::ShowBackgroundContextMenu()
{
return s_Editor->GetContextMenu().ShowBackgroundContextMenu();
}
void ax::NodeEditor::EnableShortcuts(bool enable)
{
s_Editor->EnableShortcuts(enable);
}
bool ax::NodeEditor::AreShortcutsEnabled()
{
return s_Editor->AreShortcutsEnabled();
}
bool ax::NodeEditor::BeginShortcut()
{
return s_Editor->GetShortcut().Begin();
}
bool ax::NodeEditor::AcceptCut()
{
return s_Editor->GetShortcut().AcceptCut();
}
bool ax::NodeEditor::AcceptCopy()
{
return s_Editor->GetShortcut().AcceptCopy();
}
bool ax::NodeEditor::AcceptPaste()
{
return s_Editor->GetShortcut().AcceptPaste();
}
bool ax::NodeEditor::AcceptDuplicate()
{
return s_Editor->GetShortcut().AcceptDuplicate();
}
bool ax::NodeEditor::AcceptCreateNode()
{
return s_Editor->GetShortcut().AcceptCreateNode();
}
int ax::NodeEditor::GetActionContextSize()
{
return static_cast<int>(s_Editor->GetShortcut().m_Context.size());
}
int ax::NodeEditor::GetActionContextNodes(NodeId* nodes, int size)
{
return BuildIdList(s_Editor->GetSelectedObjects(), nodes, size, [](auto object)
{
return object->AsNode() != nullptr;
});
}
int ax::NodeEditor::GetActionContextLinks(LinkId* links, int size)
{
return BuildIdList(s_Editor->GetSelectedObjects(), links, size, [](auto object)
{
return object->AsLink() != nullptr;
});
}
void ax::NodeEditor::EndShortcut()
{
return s_Editor->GetShortcut().End();
}
float ax::NodeEditor::GetCurrentZoom()
{
return s_Editor->GetView().InvScale;
}
ax::NodeEditor::NodeId ax::NodeEditor::GetHoveredNode()
{
return s_Editor->GetHoveredNode();
}
ax::NodeEditor::PinId ax::NodeEditor::GetHoveredPin()
{
return s_Editor->GetHoveredPin();
}
ax::NodeEditor::LinkId ax::NodeEditor::GetHoveredLink()
{
return s_Editor->GetHoveredLink();
}
ax::NodeEditor::NodeId ax::NodeEditor::GetDoubleClickedNode()
{
return s_Editor->GetDoubleClickedNode();
}
ax::NodeEditor::PinId ax::NodeEditor::GetDoubleClickedPin()
{
return s_Editor->GetDoubleClickedPin();
}
ax::NodeEditor::LinkId ax::NodeEditor::GetDoubleClickedLink()
{
return s_Editor->GetDoubleClickedLink();
}
bool ax::NodeEditor::IsBackgroundClicked()
{
return s_Editor->IsBackgroundClicked();
}
bool ax::NodeEditor::IsBackgroundDoubleClicked()
{
return s_Editor->IsBackgroundDoubleClicked();
}
ImGuiMouseButton ax::NodeEditor::GetBackgroundClickButtonIndex()
{
return s_Editor->GetBackgroundClickButtonIndex();
}
ImGuiMouseButton ax::NodeEditor::GetBackgroundDoubleClickButtonIndex()
{
return s_Editor->GetBackgroundDoubleClickButtonIndex();
}
bool ax::NodeEditor::GetLinkPins(LinkId linkId, PinId* startPinId, PinId* endPinId)
{
auto link = s_Editor->FindLink(linkId);
if (!link)
return false;
if (startPinId)
*startPinId = link->m_StartPin->m_ID;
if (endPinId)
*endPinId = link->m_EndPin->m_ID;
return true;
}
bool ax::NodeEditor::PinHadAnyLinks(PinId pinId)
{
return s_Editor->PinHadAnyLinks(pinId);
}
ImVec2 ax::NodeEditor::GetScreenSize()
{
return s_Editor->GetRect().GetSize();
}
ImVec2 ax::NodeEditor::ScreenToCanvas(const ImVec2& pos)
{
return s_Editor->ToCanvas(pos);
}
ImVec2 ax::NodeEditor::CanvasToScreen(const ImVec2& pos)
{
return s_Editor->ToScreen(pos);
}
int ax::NodeEditor::GetNodeCount()
{
return s_Editor->CountLiveNodes();
}
int ax::NodeEditor::GetOrderedNodeIds(NodeId* nodes, int size)
{
return s_Editor->GetNodeIds(nodes, size);
}
//Disable a bunch of warnings for now
#ifndef _MSC_VER
#pragma GCC diagnostic pop
#endif

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//------------------------------------------------------------------------------
// VERSION 0.9.1
//
// LICENSE
// This software is dual-licensed to the public domain and under the following
// license: you are granted a perpetual, irrevocable license to copy, modify,
// publish, and distribute this file as you see fit.
//
// CREDITS
// Written by Michal Cichon
//------------------------------------------------------------------------------
# ifndef __IMGUI_NODE_EDITOR_INTERNAL_INL__
# define __IMGUI_NODE_EDITOR_INTERNAL_INL__
# pragma once
//------------------------------------------------------------------------------
# include "imgui_node_editor_internal.h"
//------------------------------------------------------------------------------
namespace ax {
namespace NodeEditor {
namespace Detail {
//------------------------------------------------------------------------------
//inline ImRect ToRect(const ax::rectf& rect)
//{
// return ImRect(
// to_imvec(rect.top_left()),
// to_imvec(rect.bottom_right())
// );
//}
//
//inline ImRect ToRect(const ax::rect& rect)
//{
// return ImRect(
// to_imvec(rect.top_left()),
// to_imvec(rect.bottom_right())
// );
//}
inline ImRect ImGui_GetItemRect()
{
return ImRect(ImGui::GetItemRectMin(), ImGui::GetItemRectMax());
}
inline ImVec2 ImGui_GetMouseClickPos(ImGuiMouseButton buttonIndex)
{
if (ImGui::IsMouseDown(buttonIndex))
return ImGui::GetIO().MouseClickedPos[buttonIndex];
else
return ImGui::GetMousePos();
}
//------------------------------------------------------------------------------
} // namespace Detail
} // namespace Editor
} // namespace ax
//------------------------------------------------------------------------------
# endif // __IMGUI_NODE_EDITOR_INTERNAL_INL__

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3rdparty/imgui-node-editor/misc/cmake-modules/FindScopeGuard.cmake vendored Normal file
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if (TARGET ScopeGuard)
return()
endif()
set(_ScopeGuard_SourceDir ${IMGUI_NODE_EDITOR_ROOT_DIR}/external/ScopeGuard)
set(_ScopeGuard_BinaryDir ${CMAKE_BINARY_DIR}/external/ScopeGuard)
add_subdirectory(${_ScopeGuard_SourceDir} ${_ScopeGuard_BinaryDir})
include(${CMAKE_ROOT}/Modules/FindPackageHandleStandardArgs.cmake)
find_package_handle_standard_args(
ScopeGuard
REQUIRED_VARS
_ScopeGuard_SourceDir
)

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if (TARGET gl3w)
return()
endif()
set(_gl3w_SourceDir ${IMGUI_NODE_EDITOR_ROOT_DIR}/external/gl3w)
set(_gl3w_BinaryDir ${CMAKE_BINARY_DIR}/external/gl3w)
add_subdirectory(${_gl3w_SourceDir} ${_gl3w_BinaryDir})
include(${CMAKE_ROOT}/Modules/FindPackageHandleStandardArgs.cmake)
find_package_handle_standard_args(
gl3w
REQUIRED_VARS
_gl3w_SourceDir
)

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3rdparty/imgui-node-editor/misc/cmake-modules/Findimgui.cmake vendored Normal file
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if (TARGET imgui)
return()
endif()
set(_imgui_SourceDir ${IMGUI_NODE_EDITOR_ROOT_DIR}/external/imgui)
set(_imgui_BinaryDir ${CMAKE_BINARY_DIR}/external/imgui)
add_subdirectory(${_imgui_SourceDir} ${_imgui_BinaryDir})
include(${CMAKE_ROOT}/Modules/FindPackageHandleStandardArgs.cmake)
find_package_handle_standard_args(
imgui
REQUIRED_VARS
_imgui_SourceDir
)

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3rdparty/imgui-node-editor/misc/cmake-modules/Findimgui_node_editor.cmake vendored Normal file
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if (TARGET imgui_node_editor)
return()
endif()
#set(_imgui_node_editor_SourceDir ${IMGUI_NODE_EDITOR_ROOT_DIR})
#set(_imgui_node_editor_BinaryDir ${CMAKE_BINARY_DIR}/NodeEditor)
#add_subdirectory(${_imgui_node_editor_SourceDir} ${_imgui_node_editor_BinaryDir})
find_package(imgui REQUIRED)
set(_imgui_node_editor_Sources
${IMGUI_NODE_EDITOR_ROOT_DIR}/crude_json.cpp
${IMGUI_NODE_EDITOR_ROOT_DIR}/crude_json.h
${IMGUI_NODE_EDITOR_ROOT_DIR}/imgui_bezier_math.h
${IMGUI_NODE_EDITOR_ROOT_DIR}/imgui_bezier_math.inl
${IMGUI_NODE_EDITOR_ROOT_DIR}/imgui_canvas.cpp
${IMGUI_NODE_EDITOR_ROOT_DIR}/imgui_canvas.cpp
${IMGUI_NODE_EDITOR_ROOT_DIR}/imgui_canvas.h
${IMGUI_NODE_EDITOR_ROOT_DIR}/imgui_canvas.h
${IMGUI_NODE_EDITOR_ROOT_DIR}/imgui_extra_math.h
${IMGUI_NODE_EDITOR_ROOT_DIR}/imgui_extra_math.inl
${IMGUI_NODE_EDITOR_ROOT_DIR}/imgui_node_editor_api.cpp
${IMGUI_NODE_EDITOR_ROOT_DIR}/imgui_node_editor_internal.h
${IMGUI_NODE_EDITOR_ROOT_DIR}/imgui_node_editor_internal.inl
${IMGUI_NODE_EDITOR_ROOT_DIR}/imgui_node_editor.cpp
${IMGUI_NODE_EDITOR_ROOT_DIR}/imgui_node_editor.h
${IMGUI_NODE_EDITOR_ROOT_DIR}/misc/imgui_node_editor.natvis
)
add_library(imgui_node_editor STATIC
${_imgui_node_editor_Sources}
)
target_include_directories(imgui_node_editor PUBLIC
${IMGUI_NODE_EDITOR_ROOT_DIR}
)
target_link_libraries(imgui_node_editor PUBLIC imgui)
source_group(TREE ${IMGUI_NODE_EDITOR_ROOT_DIR} FILES ${_imgui_node_editor_Sources})
include(${CMAKE_ROOT}/Modules/FindPackageHandleStandardArgs.cmake)
find_package_handle_standard_args(
imgui_node_editor
REQUIRED_VARS
IMGUI_NODE_EDITOR_ROOT_DIR
)

17
3rdparty/imgui-node-editor/misc/cmake-modules/Findstb_image.cmake vendored Normal file
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@ -0,0 +1,17 @@
if (TARGET stb_image)
return()
endif()
set(_stb_image_SourceDir ${IMGUI_NODE_EDITOR_ROOT_DIR}/external/stb_image)
set(_stb_image_BinaryDir ${CMAKE_BINARY_DIR}/external/stb_image)
add_subdirectory(${_stb_image_SourceDir} ${_stb_image_BinaryDir})
include(${CMAKE_ROOT}/Modules/FindPackageHandleStandardArgs.cmake)
find_package_handle_standard_args(
stb_image
REQUIRED_VARS
_stb_image_SourceDir
)

18
3rdparty/imgui-node-editor/misc/crude_json.natvis vendored Normal file
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@ -0,0 +1,18 @@
<?xml version="1.0" encoding="utf-8"?>
<AutoVisualizer xmlns="http://schemas.microsoft.com/vstudio/debugger/natvis/2010">
<Type Name="crude_json::value">
<DisplayString Condition="m_Type == 1">{m_Type,en} {*(crude_json::object*)&amp;m_Storage,view(simple)}</DisplayString>
<DisplayString Condition="m_Type == 2">{m_Type,en} {*(crude_json::array*)&amp;m_Storage,view(simple)}</DisplayString>
<DisplayString Condition="m_Type == 3">{*(crude_json::string*)&amp;m_Storage,view(simple)}</DisplayString>
<DisplayString Condition="m_Type == 4">{*(crude_json::boolean*)&amp;m_Storage}</DisplayString>
<DisplayString Condition="m_Type == 5">{*(crude_json::number*)&amp;m_Storage,g}</DisplayString>
<DisplayString>{m_Type,en}</DisplayString>
<StringView Condition="m_Type == 3">*(crude_json::string*)&amp;m_Storage</StringView>
<Expand>
<ExpandedItem Condition="m_Type == 1">*(crude_json::object*)&amp;m_Storage,view(simple)</ExpandedItem>
<ExpandedItem Condition="m_Type == 2">*(crude_json::array*)&amp;m_Storage,view(simple)</ExpandedItem>
</Expand>
</Type>
</AutoVisualizer>

64
3rdparty/imgui-node-editor/misc/imgui_node_editor.natvis vendored Normal file
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@ -0,0 +1,64 @@
<?xml version="1.0" encoding="utf-8"?>
<AutoVisualizer xmlns="http://schemas.microsoft.com/vstudio/debugger/natvis/2010">
<Type Name="ax::NodeEditor::Details::SafePointerType&lt;*&gt;">
<DisplayString>{m_Value}</DisplayString>
<Expand>
<Item Name="[Value]">m_Value</Item>
<Item Name="[Pointer]">($T1*)m_Value</Item>
</Expand>
</Type>
<Type Name="ax::NodeEditor::NodeId">
<DisplayString>Node {m_Value}</DisplayString>
<Expand>
<Item Name="[Value]">m_Value</Item>
</Expand>
</Type>
<Type Name="ax::NodeEditor::LinkId">
<DisplayString>Link {m_Value}</DisplayString>
<Expand>
<Item Name="[Value]">m_Value</Item>
</Expand>
</Type>
<Type Name="ax::NodeEditor::PinId">
<DisplayString>Pin {m_Value}</DisplayString>
<Expand>
<Item Name="[Value]">m_Value</Item>
</Expand>
</Type>
<Type Name="std::pair&lt;*, crude_json::value&gt;" IncludeView="MapHelper" Priority="High">
<DisplayString>{second}</DisplayString>
<Expand HideRawView="true">
<ExpandedItem>second</ExpandedItem>
</Expand>
</Type>
<Type Name="crude_json::value">
<Intrinsic Name="object_ptr" Expression="(crude_json::object*)&amp;m_Storage" />
<Intrinsic Name="array_ptr" Expression="(crude_json::array*)&amp;m_Storage" />
<Intrinsic Name="string_ptr" Expression="(crude_json::string*)&amp;m_Storage" />
<Intrinsic Name="boolean_ptr" Expression="(crude_json::boolean*)&amp;m_Storage" />
<Intrinsic Name="number_ptr" Expression="(crude_json::number*)&amp;m_Storage" />
<DisplayString Condition="m_Type == crude_json::type_t::null">null</DisplayString>
<DisplayString Condition="m_Type == crude_json::type_t::object">{*object_ptr()} : object</DisplayString>
<DisplayString Condition="m_Type == crude_json::type_t::array">{*array_ptr()} : array</DisplayString>
<DisplayString Condition="m_Type == crude_json::type_t::string">{*string_ptr()} : string</DisplayString>
<DisplayString Condition="m_Type == crude_json::type_t::boolean">{*boolean_ptr()} : boolean</DisplayString>
<DisplayString Condition="m_Type == crude_json::type_t::number">{*number_ptr(),g} : number</DisplayString>
<DisplayString Condition="m_Type == crude_json::type_t::discarded">discarded</DisplayString>
<Expand HideRawView="true">
<!--<Synthetic Name="[type]"><DisplayString>{m_Type,en}</DisplayString></Synthetic>-->
<ExpandedItem Condition="m_Type == crude_json::type_t::object">*object_ptr(),view(simple)</ExpandedItem>
<ExpandedItem Condition="m_Type == crude_json::type_t::array">*array_ptr(),view(simple)</ExpandedItem>
<Item Name="[value]" Condition="m_Type == crude_json::type_t::string">*string_ptr(),view(simple)</Item>
<Item Name="[value]" Condition="m_Type == crude_json::type_t::boolean">*boolean_ptr()</Item>
<Item Name="[value]" Condition="m_Type == crude_json::type_t::number">*number_ptr()</Item>
</Expand>
</Type>
</AutoVisualizer>

12
CMakeLists.txt
View File

@ -92,6 +92,18 @@ target_sources(AnimTestbed PRIVATE
3rdparty/imgui/backends/imgui_impl_opengl3.cpp
3rdparty/imgui/misc/cpp/imgui_stdlib.cpp
3rdparty/imnodes/imnodes.cpp
3rdparty/imgui-node-editor/imgui_node_editor.cpp
3rdparty/imgui-node-editor/imgui_node_editor_api.cpp
3rdparty/imgui-node-editor/imgui_node_editor.h
3rdparty/imgui-node-editor/imgui_node_editor_internal.h
3rdparty/imgui-node-editor/imgui_bezier_math.h
3rdparty/imgui-node-editor/imgui_bezier_math.inl
3rdparty/imgui-node-editor/imgui_canvas.cpp
3rdparty/imgui-node-editor/imgui_canvas.h
3rdparty/imgui-node-editor/imgui_extra_math.h
3rdparty/imgui-node-editor/imgui_extra_math.inl
3rdparty/imgui-node-editor/crude_json.cpp
3rdparty/imgui-node-editor/crude_json.h
)
target_link_libraries(AnimTestbed AnimTestbedCode glfw ozz_base ozz_geometry ozz_animation ${OPENGL_LIBRARIES})

133
src/main.cc
View File

@ -22,6 +22,7 @@
#include "SkinnedMesh.h"
#include "SkinnedMeshResource.h"
#include "src/AnimGraph/AnimGraphEditor.h"
#include "3rdparty/imgui-node-editor/imgui_node_editor.h"
const int Width = 1024;
const int Height = 768;
@ -172,13 +173,22 @@ struct ApplicationConfig {
int window_position[2] = {100, 30};
int window_size[2] = {1000, 600};
struct GraphEditor {
struct LegacyGraphEditor {
bool visible = false;
int position[2] = {20, 20};
int size[2] = {800, 500};
};
GraphEditor graph_editor;
LegacyGraphEditor legacy_graph_editor;
struct GraphEditor {
bool visible = false;
int position[2] = {20, 20};
int size[2] = {800, 500};
ax::NodeEditor::Config config = {};
ax::NodeEditor::EditorContext* context = nullptr;
};
GraphEditor graph_editor;
struct SkinnedMeshWidget {
bool visible = false;
int position[2] = {20, 20};
@ -215,12 +225,18 @@ void to_json(nlohmann::json& j, const ApplicationConfig& config) {
j["main_window"]["size"][0] = config.window_size[0];
j["main_window"]["size"][1] = config.window_size[1];
j["legacy_graph_editor"]["visible"] = config.legacy_graph_editor.visible;
j["legacy_graph_editor"]["position"][0] = config.legacy_graph_editor.position[0];
j["legacy_graph_editor"]["position"][1] = config.legacy_graph_editor.position[1];
j["legacy_graph_editor"]["size"][0] = config.legacy_graph_editor.size[0];
j["legacy_graph_editor"]["size"][1] = config.legacy_graph_editor.size[1];
j["graph_editor"]["visible"] = config.graph_editor.visible;
j["graph_editor"]["position"][0] = config.graph_editor.position[0];
j["graph_editor"]["position"][1] = config.graph_editor.position[1];
j["graph_editor"]["size"][0] = config.graph_editor.size[0];
j["graph_editor"]["size"][1] = config.graph_editor.size[1];
j["skinned_mesh_widget"]["visible"] = config.skinned_mesh_widget.visible;
j["skinned_mesh_widget"]["position"][0] =
config.skinned_mesh_widget.position[0];
@ -266,11 +282,29 @@ void from_json(const nlohmann::json& j, ApplicationConfig& config) {
}
}
if (j.contains("legacy_graph_editor")) {
if (j["legacy_graph_editor"].contains("visible")) {
config.legacy_graph_editor.visible = j["legacy_graph_editor"]["visible"];
}
if (j["legacy_graph_editor"].contains("position")
and j["legacy_graph_editor"]["position"].size() == 2) {
config.legacy_graph_editor.position[0] = j["legacy_graph_editor"]["position"].at(0);
config.legacy_graph_editor.position[1] = j["legacy_graph_editor"]["position"].at(1);
}
if (j["legacy_graph_editor"].contains("size")
and j["legacy_graph_editor"]["size"].size() == 2) {
config.legacy_graph_editor.size[0] = j["legacy_graph_editor"]["size"].at(0);
config.legacy_graph_editor.size[1] = j["legacy_graph_editor"]["size"].at(1);
}
}
if (j.contains("graph_editor")) {
if (j["graph_editor"].contains("visible")) {
config.graph_editor.visible = j["graph_editor"]["visible"];
}
if (j["graph_editor"].contains("position")
and j["graph_editor"]["position"].size() == 2) {
config.graph_editor.position[0] = j["graph_editor"]["position"].at(0);
@ -283,7 +317,7 @@ void from_json(const nlohmann::json& j, ApplicationConfig& config) {
config.graph_editor.size[1] = j["graph_editor"]["size"].at(1);
}
}
if (j.contains("skinned_mesh_widget")) {
if (j["skinned_mesh_widget"].contains("visible")) {
config.skinned_mesh_widget.visible = j["skinned_mesh_widget"]["visible"];
@ -636,6 +670,10 @@ int main() {
Viewport offscreen_viewport;
// Graph Editor
gApplicationConfig.graph_editor.config.SettingsFile = "graph_editor.json";
gApplicationConfig.graph_editor.context = ax::NodeEditor::CreateEditor(&gApplicationConfig.graph_editor.config);
// draw loop
while (!glfwWindowShouldClose(w)) {
// Update time
@ -762,6 +800,10 @@ int main() {
&gApplicationConfig.animation_player_widget.visible);
ImGui::Separator();
ImGui::Checkbox(
"Legacy Graph Editor",
&gApplicationConfig.legacy_graph_editor.visible);
ImGui::Checkbox(
"ImGui Demo",
&gApplicationConfig.show_imgui_demo_window);
@ -1031,6 +1073,86 @@ int main() {
gApplicationConfig.graph_editor.size[0] = graph_editor_size.x;
gApplicationConfig.graph_editor.size[1] = graph_editor_size.y;
ax::NodeEditor::SetCurrentEditor(gApplicationConfig.graph_editor.context);
ax::NodeEditor::Begin("Graph Editor");
int unique_id = 1;
ax::NodeEditor::BeginNode(unique_id++);
// Node A
ImGui::Text("Node A");
ax::NodeEditor::BeginPin(unique_id++, ax::NodeEditor::PinKind::Input);
ImGui::Text("In");
ax::NodeEditor::EndPin();
ImGui::SameLine();
ax::NodeEditor::BeginPin(unique_id++, ax::NodeEditor::PinKind::Output);
ImGui::Text("Out");
ax::NodeEditor::EndPin();
ax::NodeEditor::EndNode();
// Node B
ax::NodeEditor::BeginNode(unique_id++);
ImGui::Text("Node B");
ax::NodeEditor::BeginPin(unique_id++, ax::NodeEditor::PinKind::Input);
ImGui::Text("In");
ax::NodeEditor::EndPin();
ImGui::SameLine();
ax::NodeEditor::BeginPin(unique_id++, ax::NodeEditor::PinKind::Output);
ImGui::Text("Out");
ax::NodeEditor::EndPin();
ax::NodeEditor::EndNode();
// Create Connections
if (ax::NodeEditor::BeginCreate()) {
ax::NodeEditor::PinId input_pin_id, output_pin_id;
if (ax::NodeEditor::QueryNewLink(&input_pin_id, &output_pin_id)) {
if (input_pin_id && output_pin_id) {
if (ax::NodeEditor::AcceptNewItem()) {
}
}
}
}
ax::NodeEditor::EndCreate();
ax::NodeEditor::End();
ax::NodeEditor::SetCurrentEditor(nullptr);
ImGui::End();
}
// Legacy Animation Graph Editor
if (gApplicationConfig.legacy_graph_editor.visible) {
ImGui::SetNextWindowPos(
ImVec2(
gApplicationConfig.legacy_graph_editor.position[0],
gApplicationConfig.legacy_graph_editor.position[1]),
ImGuiCond_FirstUseEver);
ImGui::SetNextWindowSize(
ImVec2(
gApplicationConfig.legacy_graph_editor.size[0],
gApplicationConfig.legacy_graph_editor.size[1]),
ImGuiCond_FirstUseEver);
ImGui::Begin(
"Legacy Graph Editor",
&gApplicationConfig.legacy_graph_editor.visible,
ImGuiWindowFlags_MenuBar);
ImVec2 graph_editor_position = ImGui::GetWindowPos();
gApplicationConfig.legacy_graph_editor.position[0] = graph_editor_position.x;
gApplicationConfig.legacy_graph_editor.position[1] = graph_editor_position.y;
ImVec2 graph_editor_size = ImGui::GetWindowSize();
gApplicationConfig.legacy_graph_editor.size[0] = graph_editor_size.x;
gApplicationConfig.legacy_graph_editor.size[1] = graph_editor_size.y;
AnimGraphEditorUpdate();
ImGui::End();
@ -1065,6 +1187,7 @@ int main() {
save_application_config("animtestbed_config.json");
/* cleanup */
ax::NodeEditor::DestroyEditor(gApplicationConfig.graph_editor.context);
ImNodes::DestroyContext();
ImGui::DestroyContext();
sgl_shutdown();