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Backends: Amend, docs + extra comments. (#3330, #3245)

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omar
2020-07-10 14:36:00 +02:00
parent 06f7854b16
commit fb7f6cab8c
6 changed files with 11 additions and 7 deletions
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4
examples/README.txt
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@ -204,7 +204,7 @@ example_glfw_opengl2/
GLFW + OpenGL2 example (legacy, fixed pipeline).
= main.cpp + imgui_impl_glfw.cpp + imgui_impl_opengl2.cpp
**DO NOT USE OPENGL2 CODE IF YOUR CODE/ENGINE IS USING MODERN OPENGL (SHADERS, VBO, VAO, etc.)**
**Prefer using OPENGL3 code (with gl3w/glew/glad/glbinding, you can replace the OpenGL function loader)**
**Prefer using OPENGL3 code (with gl3w/glew/glad/glad2/glbinding, you can replace the OpenGL function loader)**
This code is mostly provided as a reference to learn about Dear ImGui integration, because it is shorter.
If your code is using GL3+ context or any semi modern OpenGL calls, using this renderer is likely to
make things more complicated, will require your code to reset many OpenGL attributes to their initial
@ -253,7 +253,7 @@ example_sdl_opengl2/
SDL2 (Win32, Mac, Linux etc.) + OpenGL example (legacy, fixed pipeline).
= main.cpp + imgui_impl_sdl.cpp + imgui_impl_opengl2.cpp
**DO NOT USE OPENGL2 CODE IF YOUR CODE/ENGINE IS USING MODERN OPENGL (SHADERS, VBO, VAO, etc.)**
**Prefer using OPENGL3 code (with gl3w/glew/glad/glbinding, you can replace the OpenGL function loader)**
**Prefer using OPENGL3 code (with gl3w/glew/glad/glad2/glbinding, you can replace the OpenGL function loader)**
This code is mostly provided as a reference to learn about Dear ImGui integration, because it is shorter.
If your code is using GL3+ context or any semi modern OpenGL calls, using this renderer is likely to
make things more complicated, will require your code to reset many OpenGL attributes to their initial

2
examples/example_glfw_opengl3/main.cpp
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@ -87,7 +87,7 @@ int main(int, char**)
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD)
bool err = gladLoadGL() == 0;
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD2)
bool err = gladLoadGL(glfwGetProcAddress) == 0; // glad docs recommend using the windowing library loader instead of the (optionally) bundled one.
bool err = gladLoadGL(glfwGetProcAddress) == 0; // glad2 recommend using the windowing library loader instead of the (optionally) bundled one.
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2)
bool err = false;
glbinding::Binding::initialize();

2
examples/example_sdl_opengl3/main.cpp
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@ -82,7 +82,7 @@ int main(int, char**)
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD)
bool err = gladLoadGL() == 0;
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD2)
bool err = gladLoadGL((GLADloadfunc) SDL_GL_GetProcAddress) == 0; // glad docs recommend using the windowing library loader instead of the (optionally) bundled one.
bool err = gladLoadGL((GLADloadfunc)SDL_GL_GetProcAddress) == 0; // glad2 recommend using the windowing library loader instead of the (optionally) bundled one.
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2)
bool err = false;
glbinding::Binding::initialize();

2
examples/imgui_impl_opengl3.cpp
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@ -13,7 +13,7 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2020-07-01: OpenGL: Added support for glad2 OpenGL loader.
// 2020-07-10: OpenGL: Added support for glad2 OpenGL loader.
// 2020-05-08: OpenGL: Made default GLSL version 150 (instead of 130) on OSX.
// 2020-04-21: OpenGL: Fixed handling of glClipControl(GL_UPPER_LEFT) by inverting projection matrix.
// 2020-04-12: OpenGL: Fixed context version check mistakenly testing for 4.0+ instead of 3.2+ to enable ImGuiBackendFlags_RendererHasVtxOffset.