234 lines
8.0 KiB
C++
234 lines
8.0 KiB
C++
//----------------------------------------------------------------------------//
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// //
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// ozz-animation is hosted at http://github.com/guillaumeblanc/ozz-animation //
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// and distributed under the MIT License (MIT). //
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// //
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// Copyright (c) Guillaume Blanc //
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// //
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// Permission is hereby granted, free of charge, to any person obtaining a //
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// copy of this software and associated documentation files (the "Software"), //
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// to deal in the Software without restriction, including without limitation //
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// the rights to use, copy, modify, merge, publish, distribute, sublicense, //
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// and/or sell copies of the Software, and to permit persons to whom the //
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// Software is furnished to do so, subject to the following conditions: //
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// //
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// The above copyright notice and this permission notice shall be included in //
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// all copies or substantial portions of the Software. //
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// //
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR //
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, //
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL //
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// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER //
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING //
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER //
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// DEALINGS IN THE SOFTWARE. //
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// //
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//----------------------------------------------------------------------------//
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#ifndef OZZ_SAMPLES_FRAMEWORK_INTERNAL_IMGUI_IMPL_H_
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#define OZZ_SAMPLES_FRAMEWORK_INTERNAL_IMGUI_IMPL_H_
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#ifndef OZZ_INCLUDE_PRIVATE_HEADER
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#error "This header is private, it cannot be included from public headers."
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#endif // OZZ_INCLUDE_PRIVATE_HEADER
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// Implements immediate mode gui.
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// See imgui.h for details about function specifications.
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#include "framework/imgui.h"
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#include "ozz/base/containers/vector.h"
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#include "ozz/base/maths/rect.h"
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#include "renderer_impl.h"
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namespace ozz {
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namespace sample {
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namespace internal {
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class RendererImpl;
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// Immediate mode gui implementation.
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class ImGuiImpl : public ImGui {
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public:
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ImGuiImpl();
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virtual ~ImGuiImpl();
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// Input state.
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struct Inputs {
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// Default input values.
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Inputs() : mouse_x(0), mouse_y(0), lmb_pressed(false) {}
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// Cursor x position. 0 indicates the screen left border.
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int mouse_x;
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// Cursor y position. 0 indicates the screen bottom border.
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int mouse_y;
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// Left mouse button state. true when the left mouse button is pressed.
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bool lmb_pressed;
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};
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// Starts an imgui frame.
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// _inputs describes next frame inputs. It is internally copied.
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// _rect is the windows size.
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void BeginFrame(const Inputs& _inputs, const math::RectInt& _rect,
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RendererImpl* _renderer);
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// Ends the current imgui frame.
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void EndFrame();
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protected:
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// Starts ImGui interface implementation.
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// See imgui.h for virtual function specifications.
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virtual void BeginContainer(const char* _title, const math::RectFloat* _rect,
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bool* _open, bool _constrain);
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virtual void EndContainer();
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virtual bool DoButton(const char* _label, bool _enabled, bool* _state);
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virtual bool DoSlider(const char* _label, float _min, float _max,
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float* _value, float _pow, bool _enabled);
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virtual bool DoSlider(const char* _label, int _min, int _max, int* _value,
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float _pow, bool _enabled);
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virtual bool DoCheckBox(const char* _label, bool* _state, bool _enabled);
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virtual bool DoRadioButton(int _ref, const char* _label, int* _value,
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bool _enabled);
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virtual void DoLabel(const char* _label, Justification _justification,
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bool _single_line);
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virtual void DoGraph(const char* _label, float _min, float _max, float _mean,
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const float* _value_cursor, const float* _value_begin,
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const float* _value_end);
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private:
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// Computes the rect of a new widget to add.
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// Returns true if there is enough space for a new widget.
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bool AddWidget(float _height, math::RectFloat* _rect);
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// Implements button logic.
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// Returns true if the button was clicked.
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bool ButtonLogic(const math::RectFloat& _rect, int _id, bool* _hot,
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bool* _active);
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// Fills a rectangle with _rect coordinates. Draws rounded angles if _radius
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// is greater than 0.
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// If _texture id is not 0, then texture with id _texture is mapped using a
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// planar projection to the rect.
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void FillRect(const math::RectFloat& _rect, float _radius,
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const GLubyte _rgba[4]) const;
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void FillRect(const math::RectFloat& _rect, float _radius,
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const GLubyte _rgba[4],
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const ozz::math::Float4x4& _transform) const;
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// Strokes a rectangle with _rect coordinates. Draws rounded angles if _radius
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// is greater than 0.
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void StrokeRect(const math::RectFloat& _rect, float _radius,
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const GLubyte _rgba[4]) const;
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void StrokeRect(const math::RectFloat& _rect, float _radius,
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const GLubyte _rgba[4],
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const ozz::math::Float4x4& _transform) const;
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enum PrintLayout {
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kNorthWest,
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kNorth,
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kNorthEst,
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kWest,
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kMiddle,
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kEst,
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kSouthWest,
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kSouth,
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kSouthEst,
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};
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// Print _text in _rect.
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float Print(const char* _text, const math::RectFloat& _rect,
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PrintLayout _layout, const GLubyte _rgba[4]) const;
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// Initialize circle vertices.
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void InitializeCircle();
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// Initializes and destroys the internal font rendering system.
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void InitalizeFont();
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void DestroyFont();
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// ImGui state.
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// Current frame inputs.
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Inputs inputs_;
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// Internal states.
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// The hot item is the one that's below the mouse cursor.
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int hot_item_;
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// The active item is the one being currently interacted with.
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int active_item_;
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// The automatically generated widget identifier.
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int auto_gen_id_;
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struct Container {
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// The current rect.
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math::RectFloat rect;
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// The y offset of the top of the next widget in the current container.
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float offset_y;
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// Constrains container height to the size used by controls in the
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// container.
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bool constrain;
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};
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// Container stack.
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ozz::vector<Container> containers_;
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// Round rendering.
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// Defines the number of segments used by the precomputed circle.
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// Must be multiple of 4.
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static const int kCircleSegments = 8;
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// Circle vertices coordinates (cosine/sinus)
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float circle_[kCircleSegments][2];
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// Font rendering.
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// Declares font's structure.
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struct Font {
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int texture_width; // width of the pow2 texture.
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int texture_height; // height of the pow2 texture.
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int image_width; // width of the image area in the texture.
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int image_height; // height of the image area in the texture.
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int glyph_height;
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int glyph_width;
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int glyph_count;
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unsigned char glyph_start; // ascii code of the first character.
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const unsigned char* pixels;
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size_t pixels_size;
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};
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// Declares the font instance.
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static const Font font_;
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// Pre-cooked glyphes uv and vertex coordinates.
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struct Glyph {
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float uv[4][2];
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float pos[4][2];
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};
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Glyph glyphes_[256];
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// Glyph GL texture
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unsigned int glyph_texture_;
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// Renderer, available between Begin/EndFrame
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RendererImpl* renderer_;
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};
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} // namespace internal
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} // namespace sample
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} // namespace ozz
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#endif // OZZ_SAMPLES_FRAMEWORK_INTERNAL_IMGUI_IMPL_H_
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