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AnimTestbed/3rdparty/ozz-animation/samples/framework/application.cc

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//----------------------------------------------------------------------------//
// //
// ozz-animation is hosted at http://github.com/guillaumeblanc/ozz-animation //
// and distributed under the MIT License (MIT). //
// //
// Copyright (c) Guillaume Blanc //
// //
// 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. //
// //
//----------------------------------------------------------------------------//
#define OZZ_INCLUDE_PRIVATE_HEADER // Allows to include private headers.
#include "framework/application.h"
#include <cassert>
#include <cstdlib>
#include <cstring>
#ifdef __APPLE__
#include <unistd.h>
#endif // __APPLE__
#if EMSCRIPTEN
#include <emscripten.h>
#include <emscripten/html5.h>
#endif // EMSCRIPTEN
#include "framework/image.h"
#include "framework/internal/camera.h"
#include "framework/internal/imgui_impl.h"
#include "framework/internal/renderer_impl.h"
#include "framework/internal/shooter.h"
#include "framework/profile.h"
#include "framework/renderer.h"
#include "ozz/base/io/stream.h"
#include "ozz/base/log.h"
#include "ozz/base/maths/box.h"
#include "ozz/base/memory/allocator.h"
#include "ozz/options/options.h"
OZZ_OPTIONS_DECLARE_INT(
max_idle_loops,
"The maximum number of idle loops the sample application can perform."
" Application automatically exit when this number of loops is reached."
" A negative value disables this feature.",
-1, false);
OZZ_OPTIONS_DECLARE_BOOL(render, "Enables sample redering.", true, false);
namespace {
// Screen resolution presets.
const ozz::sample::Resolution resolution_presets[] = {
{640, 360}, {640, 480}, {800, 450}, {800, 600}, {1024, 576},
{1024, 768}, {1280, 720}, {1280, 800}, {1280, 960}, {1280, 1024},
{1400, 1050}, {1440, 900}, {1600, 900}, {1600, 1200}, {1680, 1050},
{1920, 1080}, {1920, 1200}};
const int kNumPresets = OZZ_ARRAY_SIZE(resolution_presets);
} // namespace
// Check resolution argument is within 0 - kNumPresets
static bool ResolutionCheck(const ozz::options::Option& _option,
int /*_argc*/) {
const ozz::options::IntOption& option =
static_cast<const ozz::options::IntOption&>(_option);
return option >= 0 && option < kNumPresets;
}
OZZ_OPTIONS_DECLARE_INT_FN(resolution, "Resolution index (0 to 17).", 5, false,
&ResolutionCheck);
namespace ozz {
namespace sample {
Application* Application::application_ = nullptr;
Application::Application()
: exit_(false),
freeze_(false),
fix_update_rate(false),
fixed_update_rate(60.f),
time_factor_(1.f),
time_(0.f),
last_idle_time_(0.),
show_help_(false),
vertical_sync_(true),
swap_interval_(1),
show_grid_(true),
show_axes_(true),
capture_video_(false),
capture_screenshot_(false),
fps_(New<Record>(128)),
update_time_(New<Record>(128)),
render_time_(New<Record>(128)),
resolution_(resolution_presets[0]) {
#ifndef NDEBUG
// Assert presets are correctly sorted.
for (int i = 1; i < kNumPresets; ++i) {
const Resolution& preset_m1 = resolution_presets[i - 1];
const Resolution& preset = resolution_presets[i];
assert(preset.width > preset_m1.width || preset.height > preset_m1.height);
}
#endif // NDEBUG
}
Application::~Application() {}
int Application::Run(int _argc, const char** _argv, const char* _version,
const char* _title) {
// Only one application at a time can be ran.
if (application_) {
return EXIT_FAILURE;
}
application_ = this;
// Starting application
log::Out() << "Starting sample \"" << _title << "\" version \"" << _version
<< "\"" << std::endl;
log::Out() << "Ozz libraries were built with \""
<< math::SimdImplementationName() << "\" SIMD math implementation."
<< std::endl;
// Parse command line arguments.
const char* usage =
"Ozz animation sample. See README.md file for more details.";
ozz::options::ParseResult result =
ozz::options::ParseCommandLine(_argc, _argv, _version, usage);
if (result != ozz::options::kSuccess) {
exit_ = true;
return result == ozz::options::kExitSuccess ? EXIT_SUCCESS : EXIT_FAILURE;
}
// Fetch initial resolution.
resolution_ = resolution_presets[OPTIONS_resolution];
#ifdef __APPLE__
// On OSX, when run from Finder, working path is the root path. This does not
// allow to load resources from relative path.
// The workaround is to change the working directory to application directory.
// The proper solution would probably be to use bundles and load data from
// resource folder.
chdir(ozz::options::ParsedExecutablePath().c_str());
#endif // __APPLE__
// Initialize help.
ParseReadme();
// Open an OpenGL window
bool success = true;
if (OPTIONS_render) {
// Initialize GLFW
if (!glfwInit()) {
application_ = nullptr;
return EXIT_FAILURE;
}
// Setup GL context.
const int gl_version_major = 2, gl_version_minor = 0;
glfwOpenWindowHint(GLFW_OPENGL_VERSION_MAJOR, gl_version_major);
glfwOpenWindowHint(GLFW_OPENGL_VERSION_MINOR, gl_version_minor);
glfwOpenWindowHint(GLFW_FSAA_SAMPLES, 4);
#ifndef NDEBUG
glfwOpenWindowHint(GLFW_OPENGL_DEBUG_CONTEXT, GL_TRUE);
#endif // NDEBUG
// Initializes rendering before looping.
if (!glfwOpenWindow(resolution_.width, resolution_.height, 8, 8, 8, 8, 32,
0, GLFW_WINDOW)) {
log::Err() << "Failed to open OpenGL window. Required OpenGL version is "
<< gl_version_major << "." << gl_version_minor << "."
<< std::endl;
success = false;
} else {
log::Out() << "Successfully opened OpenGL window version \""
<< glGetString(GL_VERSION) << "\"." << std::endl;
// Allocates and initializes camera
camera_ = make_unique<internal::Camera>();
math::Float3 camera_center;
math::Float2 camera_angles;
float distance;
if (GetCameraInitialSetup(&camera_center, &camera_angles, &distance)) {
camera_->Reset(camera_center, camera_angles, distance);
}
// Allocates and initializes renderer.
renderer_ = make_unique<internal::RendererImpl>(camera_.get());
success = renderer_->Initialize();
if (success) {
shooter_ = make_unique<internal::Shooter>();
im_gui_ = make_unique<internal::ImGuiImpl>();
#ifndef EMSCRIPTEN // Better not rename web page.
glfwSetWindowTitle(_title);
#endif // EMSCRIPTEN
// Setup the window and installs callbacks.
glfwSwapInterval(vertical_sync_ ? swap_interval_ : 0);
glfwSetWindowSizeCallback(&ResizeCbk);
glfwSetWindowCloseCallback(&CloseCbk);
// Loop the sample.
success = Loop();
shooter_.reset();
im_gui_.reset();
}
renderer_.reset();
camera_.reset();
}
// Closes window and terminates GLFW.
glfwTerminate();
} else {
// Loops without any rendering initialization.
success = Loop();
}
// Notifies that an error occurred.
if (!success) {
log::Err() << "An error occurred during sample execution." << std::endl;
}
application_ = nullptr;
return success ? EXIT_SUCCESS : EXIT_FAILURE;
}
// Helper function to detecte key pressed and released.
template <int _Key>
bool KeyPressed() {
static int previous_key = glfwGetKey(_Key);
const int key = glfwGetKey(_Key);
const bool pressed = previous_key == GLFW_PRESS && key == GLFW_RELEASE;
previous_key = key;
return pressed;
}
Application::LoopStatus Application::OneLoop(int _loops) {
Profiler profile(fps_.get()); // Profiles frame.
// Tests for a manual exit request.
if (exit_ || glfwGetKey(GLFW_KEY_ESC) == GLFW_PRESS) {
return kBreak;
}
// Test for an exit request.
if (OPTIONS_max_idle_loops > 0 && _loops > OPTIONS_max_idle_loops) {
return kBreak;
}
// Don't overload the cpu if the window is not active.
#ifndef EMSCRIPTEN
if (OPTIONS_render && !glfwGetWindowParam(GLFW_ACTIVE)) {
glfwWaitEvents(); // Wait...
// Reset last update time in order to stop the time while the app isn't
// active.
last_idle_time_ = glfwGetTime();
return kContinue; // ...but don't do anything.
}
#else
int width, height;
if (emscripten_get_canvas_element_size(nullptr, &width, &height) !=
EMSCRIPTEN_RESULT_SUCCESS) {
return kBreakFailure;
}
if (width != resolution_.width || height != resolution_.height) {
ResizeCbk(width, height);
}
#endif // EMSCRIPTEN
// Enable/disable help on F1 key.
show_help_ = show_help_ ^ KeyPressed<GLFW_KEY_F1>();
// Capture screenshot or video.
capture_screenshot_ = KeyPressed<'S'>();
capture_video_ = capture_video_ ^ KeyPressed<'V'>();
// Do the main loop.
if (!Idle(_loops == 0)) {
return kBreakFailure;
}
// Skips display if "no_render" option is enabled.
if (OPTIONS_render) {
if (!Display()) {
return kBreakFailure;
}
}
return kContinue;
}
void OneLoopCbk(void* _arg) {
Application* app = reinterpret_cast<Application*>(_arg);
static int loops = 0;
app->OneLoop(loops++);
}
bool Application::Loop() {
// Initialize sample.
bool success = OnInitialize();
// Emscripten requires to manage the main loop on their own, as browsers don't
// like infinite blocking functions.
#ifdef EMSCRIPTEN
emscripten_set_main_loop_arg(OneLoopCbk, this, 0, 1);
#else // EMSCRIPTEN
// Loops.
for (int loops = 0; success; ++loops) {
const LoopStatus status = OneLoop(loops);
success = status != kBreakFailure;
if (status != kContinue) {
break;
}
}
#endif // EMSCRIPTEN
// De-initialize sample, even in case of initialization failure.
OnDestroy();
return success;
}
bool Application::Display() {
assert(OPTIONS_render);
bool success = true;
{ // Profiles rendering excluding GUI.
Profiler profile(render_time_.get());
GL(ClearDepth(1.f));
GL(ClearColor(.4f, .42f, .38f, 1.f));
GL(Clear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT));
// Setup default states
GL(Enable(GL_CULL_FACE));
GL(CullFace(GL_BACK));
GL(Enable(GL_DEPTH_TEST));
GL(DepthMask(GL_TRUE));
GL(DepthFunc(GL_LEQUAL));
// Bind 3D camera matrices.
camera_->Bind3D();
// Forwards display event to the inheriting application.
if (success) {
success = OnDisplay(renderer_.get());
}
} // Ends profiling.
// Renders grid and axes at the end as they are transparent.
if (show_grid_) {
renderer_->DrawGrid(20, 1.f);
}
if (show_axes_) {
renderer_->DrawAxes(ozz::math::Float4x4::identity());
}
// Bind 2D camera matrices.
camera_->Bind2D();
// Forwards gui event to the inheriting application.
if (success) {
success = Gui();
}
// Capture back buffer.
if (capture_screenshot_ || capture_video_) {
shooter_->Capture(GL_BACK);
capture_screenshot_ = false;
}
// Swaps current window.
glfwSwapBuffers();
return success;
}
bool Application::Idle(bool _first_frame) {
// Early out if displaying help.
if (show_help_) {
last_idle_time_ = glfwGetTime();
return true;
}
// Compute elapsed time since last idle, and delta time.
float delta;
double time = glfwGetTime();
if (_first_frame || // Don't take into account time spent initializing.
time == 0.) { // Means glfw isn't initialized (rendering's disabled).
delta = 1.f / 60.f;
} else {
delta = static_cast<float>(time - last_idle_time_);
}
last_idle_time_ = time;
// Update dt, can be scaled, fixed, freezed...
float update_delta;
if (freeze_) {
update_delta = 0.f;
} else {
if (fix_update_rate) {
update_delta = time_factor_ / fixed_update_rate;
} else {
update_delta = delta * time_factor_;
}
}
// Increment current application time
time_ += update_delta;
// Forwards update event to the inheriting application.
bool update_result;
{ // Profiles update scope.
Profiler profile(update_time_.get());
update_result = OnUpdate(update_delta, time_);
}
// Updates screen shooter object.
if (shooter_) {
shooter_->Update();
}
// Update camera model-view matrix.
if (camera_) {
math::Box scene_bounds;
GetSceneBounds(&scene_bounds);
math::Float4x4 camera_transform;
if (GetCameraOverride(&camera_transform)) {
camera_->Update(camera_transform, scene_bounds, delta, _first_frame);
} else {
camera_->Update(scene_bounds, delta, _first_frame);
}
}
return update_result;
}
bool Application::Gui() {
bool success = true;
const float kFormWidth = 200.f;
const float kHelpMargin = 16.f;
// Finds gui area.
const float kGuiMargin = 2.f;
ozz::math::RectInt window_rect(0, 0, resolution_.width, resolution_.height);
// Fills ImGui's input structure.
internal::ImGuiImpl::Inputs input;
int mouse_y;
glfwGetMousePos(&input.mouse_x, &mouse_y);
input.mouse_y = window_rect.height - mouse_y;
input.lmb_pressed = glfwGetMouseButton(GLFW_MOUSE_BUTTON_LEFT) == GLFW_PRESS;
// Starts frame
im_gui_->BeginFrame(input, window_rect, renderer_.get());
// Downcast to public imgui.
ImGui* im_gui = im_gui_.get();
// Do floating gui.
if (!show_help_) {
success = OnFloatingGui(im_gui);
}
// Help gui.
{
math::RectFloat rect(kGuiMargin, kGuiMargin,
window_rect.width - kGuiMargin * 2.f,
window_rect.height - kGuiMargin * 2.f);
// Doesn't constrain form is it's opened, so it covers all screen.
ImGui::Form form(im_gui, "Show help", rect, &show_help_, !show_help_);
if (show_help_) {
im_gui->DoLabel(help_.c_str(), ImGui::kLeft, false);
}
}
// Do framework gui.
if (!show_help_ && success &&
window_rect.width > (kGuiMargin + kFormWidth) * 2.f) {
static bool open = true;
math::RectFloat rect(kGuiMargin, kGuiMargin, kFormWidth,
window_rect.height - kGuiMargin * 2.f - kHelpMargin);
ImGui::Form form(im_gui, "Framework", rect, &open, true);
if (open) {
success = FrameworkGui();
}
}
// Do sample gui.
if (!show_help_ && success && window_rect.width > kGuiMargin + kFormWidth) {
static bool open = true;
math::RectFloat rect(window_rect.width - kFormWidth - kGuiMargin,
kGuiMargin, kFormWidth,
window_rect.height - kGuiMargin * 2 - kHelpMargin);
ImGui::Form form(im_gui, "Sample", rect, &open, true);
if (open) {
// Forwards event to the inherited application.
success = OnGui(im_gui);
}
}
// Ends frame
im_gui_->EndFrame();
return success;
}
bool Application::FrameworkGui() {
char label[64];
// Downcast to public imgui.
ImGui* im_gui = im_gui_.get();
{ // Render statistics
static bool open = true;
ImGui::OpenClose stat_oc(im_gui, "Statistics", &open);
if (open) {
{ // FPS
Record::Statistics statistics = fps_->GetStatistics();
std::snprintf(label, sizeof(label), "FPS: %.0f",
statistics.mean == 0.f ? 0.f : 1000.f / statistics.mean);
static bool fps_open = false;
ImGui::OpenClose stats(im_gui, label, &fps_open);
if (fps_open) {
std::snprintf(label, sizeof(label), "Frame: %.2f ms",
statistics.mean);
im_gui->DoGraph(label, 0.f, statistics.max, statistics.latest,
fps_->cursor(), fps_->record_begin(),
fps_->record_end());
}
}
{ // Update time
Record::Statistics statistics = update_time_->GetStatistics();
std::snprintf(label, sizeof(label), "Update: %.2f ms", statistics.mean);
static bool update_open = true; // This is the most relevant for ozz.
ImGui::OpenClose stats(im_gui, label, &update_open);
if (update_open) {
im_gui->DoGraph(nullptr, 0.f, statistics.max, statistics.latest,
update_time_->cursor(), update_time_->record_begin(),
update_time_->record_end());
}
}
{ // Render time
Record::Statistics statistics = render_time_->GetStatistics();
std::snprintf(label, sizeof(label), "Render: %.2f ms", statistics.mean);
static bool render_open = false;
ImGui::OpenClose stats(im_gui, label, &render_open);
if (render_open) {
im_gui->DoGraph(nullptr, 0.f, statistics.max, statistics.latest,
render_time_->cursor(), render_time_->record_begin(),
render_time_->record_end());
}
}
}
}
{ // Time control
static bool open = false;
ImGui::OpenClose stats(im_gui, "Time control", &open);
if (open) {
im_gui->DoButton("Freeze", true, &freeze_);
im_gui->DoCheckBox("Fix update rate", &fix_update_rate, true);
if (!fix_update_rate) {
std::snprintf(label, sizeof(label), "Time factor: %.2f", time_factor_);
im_gui->DoSlider(label, -5.f, 5.f, &time_factor_);
if (im_gui->DoButton("Reset time factor", time_factor_ != 1.f)) {
time_factor_ = 1.f;
}
} else {
std::snprintf(label, sizeof(label), "Update rate: %.0f fps",
fixed_update_rate);
im_gui->DoSlider(label, 1.f, 200.f, &fixed_update_rate, .5f, true);
if (im_gui->DoButton("Reset update rate", fixed_update_rate != 60.f)) {
fixed_update_rate = 60.f;
}
}
}
}
{ // Rendering options
static bool open = false;
ImGui::OpenClose options(im_gui, "Options", &open);
if (open) {
// Multi-sampling.
static bool fsaa_available = glfwGetWindowParam(GLFW_FSAA_SAMPLES) != 0;
static bool fsaa_enabled = fsaa_available;
if (im_gui->DoCheckBox("Anti-aliasing", &fsaa_enabled, fsaa_available)) {
if (fsaa_enabled) {
GL(Enable(GL_MULTISAMPLE));
} else {
GL(Disable(GL_MULTISAMPLE));
}
}
// Vertical sync & swap interval
bool changed = im_gui->DoCheckBox("Vertical sync", &vertical_sync_);
std::snprintf(label, sizeof(label), "Swap interval: %d", swap_interval_);
changed |=
im_gui->DoSlider(label, 1, 4, &swap_interval_, 1.f, vertical_sync_);
if (changed) {
glfwSwapInterval(vertical_sync_ ? swap_interval_ : 0);
}
im_gui->DoCheckBox("Show grid", &show_grid_, true);
im_gui->DoCheckBox("Show axes", &show_axes_, true);
}
// Searches for matching resolution settings.
int preset_lookup = 0;
for (; preset_lookup < kNumPresets - 1; ++preset_lookup) {
const Resolution& preset = resolution_presets[preset_lookup];
if (preset.width > resolution_.width) {
break;
} else if (preset.width == resolution_.width) {
if (preset.height >= resolution_.height) {
break;
}
}
}
std::snprintf(label, sizeof(label), "Resolution: %dx%d", resolution_.width,
resolution_.height);
if (im_gui->DoSlider(label, 0, kNumPresets - 1, &preset_lookup)) {
// Resolution changed.
resolution_ = resolution_presets[preset_lookup];
glfwSetWindowSize(resolution_.width, resolution_.height);
}
}
{ // Capture
static bool open = false;
ImGui::OpenClose controls(im_gui, "Capture", &open);
if (open) {
im_gui->DoButton("Capture video", true, &capture_video_);
capture_screenshot_ |= im_gui->DoButton(
"Capture screenshot", !capture_video_, &capture_screenshot_);
}
}
{ // Controls
static bool open = false;
ImGui::OpenClose controls(im_gui, "Camera controls", &open);
if (open) {
camera_->OnGui(im_gui);
}
}
return true;
}
bool Application::OnInitialize() { return true; }
void Application::OnDestroy() {}
bool Application::OnUpdate(float _dt, float _time) {
(void)_dt;
(void)_time;
return true;
}
bool Application::OnGui(ImGui* _im_gui) {
(void)_im_gui;
return true;
}
bool Application::OnFloatingGui(ImGui* _im_gui) {
(void)_im_gui;
return true;
}
bool Application::OnDisplay(Renderer* _renderer) {
(void)_renderer;
return true;
}
bool Application::GetCameraInitialSetup(math::Float3* _center,
math::Float2* _angles,
float* _distance) const {
(void)_center;
(void)_angles;
(void)_distance;
return false;
}
// Default implementation doesn't override camera location.
bool Application::GetCameraOverride(math::Float4x4* _transform) const {
(void)_transform;
assert(_transform);
return false;
}
void Application::GetSceneBounds(math::Box* _bound) const { (void)_bound; }
math::Float2 Application::WorldToScreen(const math::Float3& _world) const {
const math::SimdFloat4 ndc =
(camera_->projection() * camera_->view()) *
math::simd_float4::Load(_world.x, _world.y, _world.z, 1.f);
const math::SimdFloat4 resolution = math::simd_float4::FromInt(
math::simd_int4::Load(resolution_.width, resolution_.height, 0, 0));
const ozz::math::SimdFloat4 screen =
resolution * ((ndc / math::SplatW(ndc)) + math::simd_float4::one()) /
math::simd_float4::Load1(2.f);
math::Float2 ret;
math::Store2PtrU(screen, &ret.x);
return ret;
}
void Application::ResizeCbk(int _width, int _height) {
// Stores new resolution settings.
application_->resolution_.width = _width;
application_->resolution_.height = _height;
// Uses the full viewport.
GL(Viewport(0, 0, _width, _height));
// Forwards screen size to camera and shooter.
application_->camera_->Resize(_width, _height);
application_->shooter_->Resize(_width, _height);
}
int Application::CloseCbk() {
application_->exit_ = true;
return GL_FALSE; // The window will be closed while exiting the main loop.
}
void Application::ParseReadme() {
const char* error_message = "Unable to find README.md help file.";
// Get README file, opens as binary to avoid conversions.
ozz::io::File file("README.md", "rb");
if (!file.opened()) {
help_ = error_message;
return;
}
// Allocate enough space to store the whole file.
const size_t read_length = file.Size();
ozz::memory::Allocator* allocator = ozz::memory::default_allocator();
char* content = reinterpret_cast<char*>(allocator->Allocate(read_length, 4));
// Read the content
if (file.Read(content, read_length) == read_length) {
help_ = ozz::string(content, content + read_length);
} else {
help_ = error_message;
}
// Deallocate temporary buffer;
allocator->Deallocate(content);
}
} // namespace sample
} // namespace ozz
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