implot/backends/implot_impl_opengl3.h

// MIT License

// Copyright (c) 2021 Evan Pezent

// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

// ImPlot v0.13 WIP

#pragma once

#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