mirror of https://github.com/ocornut/imgui
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
44 lines
2.6 KiB
C
44 lines
2.6 KiB
C
// dear imgui: Renderer Backend for OpenGL2 (legacy OpenGL, fixed pipeline)
|
|
// 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 as texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
|
|
// [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
|
|
// Missing features or Issues:
|
|
// [ ] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
|
|
|
|
// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
|
|
// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
|
|
// Learn about Dear ImGui:
|
|
// - FAQ https://dearimgui.com/faq
|
|
// - Getting Started https://dearimgui.com/getting-started
|
|
// - Documentation https://dearimgui.com/docs (same as your local docs/ folder).
|
|
// - Introduction, links and more at the top of imgui.cpp
|
|
|
|
// **DO NOT USE THIS CODE IF YOUR CODE/ENGINE IS USING MODERN OPENGL (SHADERS, VBO, VAO, etc.)**
|
|
// **Prefer using the code in imgui_impl_opengl3.cpp**
|
|
// This code is mostly provided as a reference to learn how ImGui integration works, because it is shorter to read.
|
|
// If your code is using GL3+ context or any semi modern OpenGL calls, using this is likely to make everything more
|
|
// complicated, will require your code to reset every single OpenGL attributes to their initial state, and might
|
|
// confuse your GPU driver.
|
|
// The GL2 code is unable to reset attributes or even call e.g. "glUseProgram(0)" because they don't exist in that API.
|
|
|
|
#pragma once
|
|
#include "imgui.h" // IMGUI_IMPL_API
|
|
#ifndef IMGUI_DISABLE
|
|
|
|
// Follow "Getting Started" link and check examples/ folder to learn about using backends!
|
|
IMGUI_IMPL_API bool ImGui_ImplOpenGL2_Init();
|
|
IMGUI_IMPL_API void ImGui_ImplOpenGL2_Shutdown();
|
|
IMGUI_IMPL_API void ImGui_ImplOpenGL2_NewFrame();
|
|
IMGUI_IMPL_API void ImGui_ImplOpenGL2_RenderDrawData(ImDrawData* draw_data);
|
|
|
|
// Called by Init/NewFrame/Shutdown
|
|
IMGUI_IMPL_API bool ImGui_ImplOpenGL2_CreateDeviceObjects();
|
|
IMGUI_IMPL_API void ImGui_ImplOpenGL2_DestroyDeviceObjects();
|
|
|
|
// (Advanced) Use e.g. if you need to precisely control the timing of texture updates (e.g. for staged rendering), by setting ImDrawData::Textures = NULL to handle this manually.
|
|
IMGUI_IMPL_API void ImGui_ImplOpenGL2_UpdateTexture(ImTextureData* tex);
|
|
|
|
#endif // #ifndef IMGUI_DISABLE
|