//========================================================================
// GLFW 3.4 EGL - www.glfw.org
//------------------------------------------------------------------------
// Copyright (c) 2002-2006 Marcus Geelnard
// Copyright (c) 2006-2017 Camilla Löwy <elmindreda@glfw.org>
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
//    claim that you wrote the original software. If you use this software
//    in a product, an acknowledgment in the product documentation would
//    be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not
//    be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
//    distribution.
//
//========================================================================

#if defined(_GLFW_WIN32)
 #define EGLAPIENTRY __stdcall
#else
 #define EGLAPIENTRY
#endif

#define EGL_SUCCESS 0x3000
#define EGL_NOT_INITIALIZED 0x3001
#define EGL_BAD_ACCESS 0x3002
#define EGL_BAD_ALLOC 0x3003
#define EGL_BAD_ATTRIBUTE 0x3004
#define EGL_BAD_CONFIG 0x3005
#define EGL_BAD_CONTEXT 0x3006
#define EGL_BAD_CURRENT_SURFACE 0x3007
#define EGL_BAD_DISPLAY 0x3008
#define EGL_BAD_MATCH 0x3009
#define EGL_BAD_NATIVE_PIXMAP 0x300a
#define EGL_BAD_NATIVE_WINDOW 0x300b
#define EGL_BAD_PARAMETER 0x300c
#define EGL_BAD_SURFACE 0x300d
#define EGL_CONTEXT_LOST 0x300e
#define EGL_COLOR_BUFFER_TYPE 0x303f
#define EGL_RGB_BUFFER 0x308e
#define EGL_SURFACE_TYPE 0x3033
#define EGL_WINDOW_BIT 0x0004
#define EGL_RENDERABLE_TYPE 0x3040
#define EGL_OPENGL_ES_BIT 0x0001
#define EGL_OPENGL_ES2_BIT 0x0004
#define EGL_OPENGL_BIT 0x0008
#define EGL_ALPHA_SIZE 0x3021
#define EGL_BLUE_SIZE 0x3022
#define EGL_GREEN_SIZE 0x3023
#define EGL_RED_SIZE 0x3024
#define EGL_DEPTH_SIZE 0x3025
#define EGL_STENCIL_SIZE 0x3026
#define EGL_SAMPLES 0x3031
#define EGL_OPENGL_ES_API 0x30a0
#define EGL_OPENGL_API 0x30a2
#define EGL_NONE 0x3038
#define EGL_EXTENSIONS 0x3055
#define EGL_CONTEXT_CLIENT_VERSION 0x3098
#define EGL_NATIVE_VISUAL_ID 0x302e
#define EGL_NO_SURFACE ((EGLSurface) 0)
#define EGL_NO_DISPLAY ((EGLDisplay) 0)
#define EGL_NO_CONTEXT ((EGLContext) 0)
#define EGL_DEFAULT_DISPLAY ((EGLNativeDisplayType) 0)
#define EGL_MIN_SWAP_INTERVAL             0x303B
#define EGL_MAX_SWAP_INTERVAL             0x303C

#define EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR 0x00000002
#define EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR 0x00000001
#define EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT_KHR 0x00000002
#define EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR 0x00000001
#define EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_KHR 0x31bd
#define EGL_NO_RESET_NOTIFICATION_KHR 0x31be
#define EGL_LOSE_CONTEXT_ON_RESET_KHR 0x31bf
#define EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR 0x00000004
#define EGL_CONTEXT_MAJOR_VERSION_KHR 0x3098
#define EGL_CONTEXT_MINOR_VERSION_KHR 0x30fb
#define EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR 0x30fd
#define EGL_CONTEXT_FLAGS_KHR 0x30fc
#define EGL_CONTEXT_OPENGL_NO_ERROR_KHR 0x31b3
#define EGL_GL_COLORSPACE_KHR 0x309d
#define EGL_GL_COLORSPACE_SRGB_KHR 0x3089
#define EGL_CONTEXT_RELEASE_BEHAVIOR_KHR 0x2097
#define EGL_CONTEXT_RELEASE_BEHAVIOR_NONE_KHR 0
#define EGL_CONTEXT_RELEASE_BEHAVIOR_FLUSH_KHR 0x2098
#define EGL_PLATFORM_X11_EXT 0x31d5
#define EGL_PLATFORM_WAYLAND_EXT 0x31d8
#define EGL_PLATFORM_ANGLE_ANGLE 0x3202
#define EGL_PLATFORM_ANGLE_TYPE_ANGLE 0x3203
#define EGL_PLATFORM_ANGLE_TYPE_OPENGL_ANGLE 0x320d
#define EGL_PLATFORM_ANGLE_TYPE_OPENGLES_ANGLE 0x320e
#define EGL_PLATFORM_ANGLE_TYPE_D3D9_ANGLE 0x3207
#define EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE 0x3208
#define EGL_PLATFORM_ANGLE_TYPE_VULKAN_ANGLE 0x3450
#define EGL_PLATFORM_ANGLE_TYPE_METAL_ANGLE 0x3489
#define EGL_PLATFORM_ANGLE_NATIVE_PLATFORM_TYPE_ANGLE 0x348f

typedef int EGLint;
typedef unsigned int EGLBoolean;
typedef unsigned int EGLenum;
typedef void* EGLConfig;
typedef void* EGLContext;
typedef void* EGLDisplay;
typedef void* EGLSurface;

typedef void* EGLNativeDisplayType;
typedef void* EGLNativeWindowType;

// EGL function pointer typedefs
typedef EGLBoolean (EGLAPIENTRY * PFN_eglGetConfigAttrib)(EGLDisplay,EGLConfig,EGLint,EGLint*);
typedef EGLBoolean (EGLAPIENTRY * PFN_eglGetConfigs)(EGLDisplay,EGLConfig*,EGLint,EGLint*);
typedef EGLBoolean (EGLAPIENTRY * PFN_eglChooseConfig)(EGLDisplay,EGLint const*,EGLConfig*,EGLint,EGLint*);
typedef EGLDisplay (EGLAPIENTRY * PFN_eglGetDisplay)(EGLNativeDisplayType);
typedef EGLint (EGLAPIENTRY * PFN_eglGetError)(void);
typedef EGLBoolean (EGLAPIENTRY * PFN_eglInitialize)(EGLDisplay,EGLint*,EGLint*);
typedef EGLBoolean (EGLAPIENTRY * PFN_eglTerminate)(EGLDisplay);
typedef EGLBoolean (EGLAPIENTRY * PFN_eglBindAPI)(EGLenum);
typedef EGLContext (EGLAPIENTRY * PFN_eglCreateContext)(EGLDisplay,EGLConfig,EGLContext,const EGLint*);
typedef EGLBoolean (EGLAPIENTRY * PFN_eglDestroySurface)(EGLDisplay,EGLSurface);
typedef EGLBoolean (EGLAPIENTRY * PFN_eglDestroyContext)(EGLDisplay,EGLContext);
typedef EGLSurface (EGLAPIENTRY * PFN_eglCreateWindowSurface)(EGLDisplay,EGLConfig,EGLNativeWindowType,const EGLint*);
typedef EGLBoolean (EGLAPIENTRY * PFN_eglMakeCurrent)(EGLDisplay,EGLSurface,EGLSurface,EGLContext);
typedef EGLBoolean (EGLAPIENTRY * PFN_eglSwapBuffers)(EGLDisplay,EGLSurface);
typedef EGLBoolean (EGLAPIENTRY * PFN_eglSwapInterval)(EGLDisplay,EGLint);
typedef const char* (EGLAPIENTRY * PFN_eglQueryString)(EGLDisplay,EGLint);
typedef const char* (EGLAPIENTRY * PFN_eglQuerySurface)(EGLDisplay,EGLSurface,EGLint,EGLint*);
typedef GLFWglproc (EGLAPIENTRY * PFN_eglGetProcAddress)(const char*);
#define eglGetConfigAttrib _glfw.egl.GetConfigAttrib
#define eglGetConfigs _glfw.egl.GetConfigs
#define eglChooseConfig _glfw.egl.ChooseConfig
#define eglGetDisplay _glfw.egl.GetDisplay
#define eglGetError _glfw.egl.GetError
#define eglInitialize _glfw.egl.Initialize
#define eglTerminate _glfw.egl.Terminate
#define eglBindAPI _glfw.egl.BindAPI
#define eglCreateContext _glfw.egl.CreateContext
#define eglDestroySurface _glfw.egl.DestroySurface
#define eglDestroyContext _glfw.egl.DestroyContext
#define eglCreateWindowSurface _glfw.egl.CreateWindowSurface
#define eglMakeCurrent _glfw.egl.MakeCurrent
#define eglSwapBuffers _glfw.egl.SwapBuffers
#define eglSwapInterval _glfw.egl.SwapInterval
#define eglQueryString _glfw.egl.QueryString
#define eglQuerySurface _glfw.egl.QuerySurface
#define eglGetProcAddress _glfw.egl.GetProcAddress

typedef EGLDisplay (EGLAPIENTRY * PFNEGLGETPLATFORMDISPLAYEXTPROC)(EGLenum,void*,const EGLint*);
typedef EGLSurface (EGLAPIENTRY * PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC)(EGLDisplay,EGLConfig,void*,const EGLint*);
#define eglGetPlatformDisplayEXT _glfw.egl.GetPlatformDisplayEXT
#define eglCreatePlatformWindowSurfaceEXT _glfw.egl.CreatePlatformWindowSurfaceEXT

// EGL-specific per-context data
//
typedef struct _GLFWcontextEGL
{
    EGLConfig        config;
    EGLContext       handle;
    EGLSurface       surface;

    void*            client;

} _GLFWcontextEGL;

// EGL-specific global data
//
typedef struct _GLFWlibraryEGL
{
    EGLenum         platform;
    EGLDisplay      display;
    EGLint          major, minor;
    bool            prefix;

    bool            KHR_create_context;
    bool            KHR_create_context_no_error;
    bool            KHR_gl_colorspace;
    bool            KHR_get_all_proc_addresses;
    bool            KHR_context_flush_control;
    bool            EXT_client_extensions;
    bool            EXT_platform_base;
    bool            EXT_platform_x11;
    bool            EXT_platform_wayland;
    bool            EXT_present_opaque;
    bool            ANGLE_platform_angle;
    bool            ANGLE_platform_angle_opengl;
    bool            ANGLE_platform_angle_d3d;
    bool            ANGLE_platform_angle_vulkan;
    bool            ANGLE_platform_angle_metal;

    void*           handle;

    PFN_eglGetConfigAttrib      GetConfigAttrib;
    PFN_eglGetConfigs           GetConfigs;
    PFN_eglChooseConfig         ChooseConfig;
    PFN_eglGetDisplay           GetDisplay;
    PFN_eglGetError             GetError;
    PFN_eglInitialize           Initialize;
    PFN_eglTerminate            Terminate;
    PFN_eglBindAPI              BindAPI;
    PFN_eglCreateContext        CreateContext;
    PFN_eglDestroySurface       DestroySurface;
    PFN_eglDestroyContext       DestroyContext;
    PFN_eglCreateWindowSurface  CreateWindowSurface;
    PFN_eglMakeCurrent          MakeCurrent;
    PFN_eglSwapBuffers          SwapBuffers;
    PFN_eglSwapInterval         SwapInterval;
    PFN_eglQueryString          QueryString;
    PFN_eglQuerySurface         QuerySurface;
    PFN_eglGetProcAddress       GetProcAddress;

    PFNEGLGETPLATFORMDISPLAYEXTPROC GetPlatformDisplayEXT;
    PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC CreatePlatformWindowSurfaceEXT;

} _GLFWlibraryEGL;


bool _glfwInitEGL(void);
void _glfwTerminateEGL(void);
bool _glfwCreateContextEGL(_GLFWwindow* window,
                               const _GLFWctxconfig* ctxconfig,
                               const _GLFWfbconfig* fbconfig);
#if defined(_GLFW_X11)
bool _glfwChooseVisualEGL(const _GLFWwndconfig* wndconfig,
                              const _GLFWctxconfig* ctxconfig,
                              const _GLFWfbconfig* fbconfig,
                              Visual** visual, int* depth);
#endif /*_GLFW_X11*/
