// dear imgui: Renderer Backend 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 Backend (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 examples/ folder for examples of using this. // If you are new to Dear ImGui, read documentation from the docs/ folder + read the top of imgui.cpp. // Read online: https://github.com/ocornut/imgui/tree/master/docs // 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