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Backends: OpenGL3: Support older 2.x series of glbinding as loader for OpenGL3 (#3061)

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This removes the unversioned definition IMGUI_IMPL_OPENGL_LOADER_GLBINDING in favor of two versioned ones to choose explicitly.
References: #2870, 5e2329b98e
This commit is contained in:
David Kalnischkies 2020-02-20 15:49:15 +01:00 committed by omar
parent 4986dba270
commit ac4262ad01
6 changed files with 47 additions and 16 deletions
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7
examples/example_glfw_opengl3/Makefile
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@ -42,8 +42,11 @@ CXXFLAGS += -I../libs/gl3w -DIMGUI_IMPL_OPENGL_LOADER_GL3W
# CXXFLAGS += -I../libs/glad/include -DIMGUI_IMPL_OPENGL_LOADER_GLAD
## Using OpenGL loader: glbinding
## (This assumes a system-wide installation)
# CXXFLAGS += -lglbinding -DIMGUI_IMPL_OPENGL_LOADER_GLBINDING
## This assumes a system-wide installation
## of either version 3.0.0 (or newer)
# CXXFLAGS += -lglbinding -DIMGUI_IMPL_OPENGL_LOADER_GLBINDING3
## or the older version 2.x
# CXXFLAGS += -lglbinding -DIMGUI_IMPL_OPENGL_LOADER_GLBINDING2
##---------------------------------------------------------------------
## BUILD FLAGS PER PLATFORM

11
examples/example_glfw_opengl3/main.cpp
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@ -17,9 +17,13 @@
#include <GL/glew.h> // Initialize with glewInit()
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD)
#include <glad/glad.h> // Initialize with gladLoadGL()
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING)
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2) || defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING3)
#define GLFW_INCLUDE_NONE // GLFW including OpenGL headers causes ambiguity or multiple definition errors.
#if defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2)
#include <glbinding/Binding.h> // Initialize with glbinding::Binding::initialize()
#else
#include <glbinding/glbinding.h> // Initialize with glbinding::initialize()
#endif
#include <glbinding/gl/gl.h>
using namespace gl;
#else
@ -79,7 +83,10 @@ int main(int, char**)
bool err = glewInit() != GLEW_OK;
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD)
bool err = gladLoadGL() == 0;
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING)
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2)
bool err = false;
glbinding::Binding::initialize();
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING3)
bool err = false;
glbinding::initialize([](const char* name) { return (glbinding::ProcAddress)glfwGetProcAddress(name); });
#else

7
examples/example_sdl_opengl3/Makefile
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@ -42,8 +42,11 @@ CXXFLAGS += -I../libs/gl3w -DIMGUI_IMPL_OPENGL_LOADER_GL3W
# CXXFLAGS += -I../libs/glad/include -DIMGUI_IMPL_OPENGL_LOADER_GLAD
## Using OpenGL loader: glbinding
## (This assumes a system-wide installation)
# CXXFLAGS += -lglbinding -DIMGUI_IMPL_OPENGL_LOADER_GLBINDING
## This assumes a system-wide installation
## of either version 3.0.0 (or newer)
# CXXFLAGS += -lglbinding -DIMGUI_IMPL_OPENGL_LOADER_GLBINDING3
## or the older version 2.x
# CXXFLAGS += -lglbinding -DIMGUI_IMPL_OPENGL_LOADER_GLBINDING2
##---------------------------------------------------------------------
## BUILD FLAGS PER PLATFORM

11
examples/example_sdl_opengl3/main.cpp
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@ -19,8 +19,12 @@
#include <GL/glew.h> // Initialize with glewInit()
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD)
#include <glad/glad.h> // Initialize with gladLoadGL()
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING)
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2) || defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING3)
#if defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2)
#include <glbinding/Binding.h> // Initialize with glbinding::Binding::initialize()
#else
#include <glbinding/glbinding.h> // Initialize with glbinding::initialize()
#endif
#include <glbinding/gl/gl.h>
using namespace gl;
#else
@ -73,7 +77,10 @@ int main(int, char**)
bool err = glewInit() != GLEW_OK;
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD)
bool err = gladLoadGL() == 0;
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING)
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2)
bool err = false;
glbinding::Binding::initialize();
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING3)
bool err = false;
glbinding::initialize([](const char* name) { return (glbinding::ProcAddress)SDL_GL_GetProcAddress(name); });
#else

18
examples/imgui_impl_opengl3.cpp
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@ -86,14 +86,16 @@
#undef IMGUI_IMPL_OPENGL_LOADER_GL3W
#undef IMGUI_IMPL_OPENGL_LOADER_GLEW
#undef IMGUI_IMPL_OPENGL_LOADER_GLAD
#undef IMGUI_IMPL_OPENGL_LOADER_GLBINDING
#undef IMGUI_IMPL_OPENGL_LOADER_GLBINDING2
#undef IMGUI_IMPL_OPENGL_LOADER_GLBINDING3
#undef IMGUI_IMPL_OPENGL_LOADER_CUSTOM
#elif defined(__EMSCRIPTEN__)
#define IMGUI_IMPL_OPENGL_ES2 // Emscripten -> GL ES 2, "#version 100"
#undef IMGUI_IMPL_OPENGL_LOADER_GL3W
#undef IMGUI_IMPL_OPENGL_LOADER_GLEW
#undef IMGUI_IMPL_OPENGL_LOADER_GLAD
#undef IMGUI_IMPL_OPENGL_LOADER_GLBINDING
#undef IMGUI_IMPL_OPENGL_LOADER_GLBINDING2
#undef IMGUI_IMPL_OPENGL_LOADER_GLBINDING3
#undef IMGUI_IMPL_OPENGL_LOADER_CUSTOM
#endif
#endif
@ -118,9 +120,13 @@
#include <GL/glew.h> // Needs to be initialized with glewInit() in user's code
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD)
#include <glad/glad.h> // Needs to be initialized with gladLoadGL() in user's code
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING)
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2) || defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING3)
#include <glbinding/gl/gl.h> // Initialize with glbinding::initialize()
#if defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2)
#include <glbinding/Binding.h>
#else
#include <glbinding/glbinding.h>
#endif
using namespace gl;
#else
#include IMGUI_IMPL_OPENGL_LOADER_CUSTOM
@ -193,8 +199,10 @@ bool ImGui_ImplOpenGL3_Init(const char* glsl_version)
gl_loader = "GLEW";
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD)
gl_loader = "GLAD";
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING)
gl_loader = "glbinding";
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2)
gl_loader = "glbinding2";
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING3)
gl_loader = "glbinding3";
#else // IMGUI_IMPL_OPENGL_LOADER_CUSTOM
gl_loader = "Custom";
#endif

9
examples/imgui_impl_opengl3.h
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@ -46,7 +46,8 @@ IMGUI_IMPL_API void ImGui_ImplOpenGL3_DestroyDeviceObjects();
#if !defined(IMGUI_IMPL_OPENGL_LOADER_GL3W) \
&& !defined(IMGUI_IMPL_OPENGL_LOADER_GLEW) \
&& !defined(IMGUI_IMPL_OPENGL_LOADER_GLAD) \
&& !defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING) \
&& !defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2) \
&& !defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING3) \
&& !defined(IMGUI_IMPL_OPENGL_LOADER_CUSTOM)
#if defined(__has_include)
#if __has_include(<GL/glew.h>)
@ -55,8 +56,10 @@ IMGUI_IMPL_API void ImGui_ImplOpenGL3_DestroyDeviceObjects();
#define IMGUI_IMPL_OPENGL_LOADER_GLAD
#elif __has_include(<GL/gl3w.h>)
#define IMGUI_IMPL_OPENGL_LOADER_GL3W
#elif __has_include(<glbinding/gl/gl.h>)
#define IMGUI_IMPL_OPENGL_LOADER_GLBINDING
#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