53 lines
2.8 KiB
C
53 lines
2.8 KiB
C
// dear imgui: Renderer for OpenGL3 / OpenGL ES2 / OpenGL ES3 (modern OpenGL with shaders / programmatic pipeline)
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// This needs to be used along with a Platform Binding (e.g. GLFW, SDL, Win32, custom..)
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// (Note: We are using GL3W as a helper library to access OpenGL functions since there is no standard header to access modern OpenGL functions easily. Alternatives are GLEW, Glad, etc..)
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// Implemented features:
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// [X] Renderer: User texture binding. Use 'GLuint' OpenGL texture identifier as void*/ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
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// [X] Renderer: Multi-viewport support. Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'.
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// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
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// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp.
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// https://github.com/ocornut/imgui
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// About OpenGL function loaders:
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// About OpenGL function loaders: modern OpenGL doesn't have a standard header file and requires individual function pointers to be loaded manually.
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// Helper libraries are often used for this purpose! Here we are supporting a few common ones: gl3w, glew, glad.
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// You may use another loader/header of your choice (glext, glLoadGen, etc.), or chose to manually implement your own.
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// About GLSL version:
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// The 'glsl_version' initialization parameter should be NULL (default) or a "#version XXX" string.
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// On computer platform the GLSL version default to "#version 130". On OpenGL ES 3 platform it defaults to "#version 300 es"
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// Only override if your GL version doesn't handle this GLSL version. See GLSL version table at the top of imgui_impl_opengl3.cpp.
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#pragma once
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// Set default OpenGL loader to be gl3w
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#if !defined(IMGUI_IMPL_OPENGL_LOADER_GL3W) \
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&& !defined(IMGUI_IMPL_OPENGL_LOADER_GLEW) \
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&& !defined(IMGUI_IMPL_OPENGL_LOADER_GLAD) \
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&& !defined(IMGUI_IMPL_OPENGL_LOADER_CUSTOM)
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#define IMGUI_IMPL_OPENGL_LOADER_GL3W
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#endif
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// MOD START (martin), 2018-03-09: support texture references that point to an address of a texture id
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union GLTextureRef {
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int mTextureId;
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struct {
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int magic;
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unsigned int* mTextureIdPtr;
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};
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};
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// MOD END (martin), 2018-03-09: support texture references that point to an address of a texture id
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IMGUI_IMPL_API bool ImGui_ImplOpenGL3_Init(const char* glsl_version = NULL);
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IMGUI_IMPL_API void ImGui_ImplOpenGL3_Shutdown();
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IMGUI_IMPL_API void ImGui_ImplOpenGL3_NewFrame();
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IMGUI_IMPL_API void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data);
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// Called by Init/NewFrame/Shutdown
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IMGUI_IMPL_API bool ImGui_ImplOpenGL3_CreateFontsTexture();
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IMGUI_IMPL_API void ImGui_ImplOpenGL3_DestroyFontsTexture();
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IMGUI_IMPL_API bool ImGui_ImplOpenGL3_CreateDeviceObjects();
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IMGUI_IMPL_API void ImGui_ImplOpenGL3_DestroyDeviceObjects();
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