| // 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 |
| |
| // 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 versions |
| //#define IMGUI_IMPL_OPENGL_ES2 // Auto-detected on Emscripten |
| //#define IMGUI_IMPL_OPENGL_ES3 // Auto-detected on iOS/Android |
| |
| // Desktop OpenGL: attempt to detect default 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 '#define IMGUI_IMPL_OPENGL_LOADER_XXX' in imconfig.h or compiler command-line. |
| #if !defined(IMGUI_IMPL_OPENGL_LOADER_GL3W) \ |
| && !defined(IMGUI_IMPL_OPENGL_LOADER_GLEW) \ |
| && !defined(IMGUI_IMPL_OPENGL_LOADER_GLAD) \ |
| && !defined(IMGUI_IMPL_OPENGL_LOADER_CUSTOM) |
| #if 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(<GL/gl3w.h>) |
| #define IMGUI_IMPL_OPENGL_LOADER_GL3W |
| #else |
| #error "Cannot detect OpenGL loader!" |
| #endif |
| #else |
| #define IMGUI_IMPL_OPENGL_LOADER_GL3W // Default to GL3W |
| #endif |
| #endif |
| |