/* -LICENSE-START-
 ** Copyright (c) 2012 Blackmagic Design
 **  
 ** Permission is hereby granted, free of charge, to any person or organization 
 ** obtaining a copy of the software and accompanying documentation (the 
 ** "Software") to use, reproduce, display, distribute, sub-license, execute, 
 ** and transmit the Software, and to prepare derivative works of the Software, 
 ** and to permit third-parties to whom the Software is furnished to do so, in 
 ** accordance with:
 ** 
 ** (1) if the Software is obtained from Blackmagic Design, the End User License 
 ** Agreement for the Software Development Kit ("EULA") available at 
 ** https://www.blackmagicdesign.com/EULA/DeckLinkSDK; or
 ** 
 ** (2) if the Software is obtained from any third party, such licensing terms 
 ** as notified by that third party,
 ** 
 ** and all subject to the following:
 ** 
 ** (3) the copyright notices in the Software and this entire statement, 
 ** including the above license grant, this restriction and the following 
 ** disclaimer, must be included in all copies of the Software, in whole or in 
 ** part, and all derivative works of the Software, unless such copies or 
 ** derivative works are solely in the form of machine-executable object code 
 ** generated by a source language processor.
 ** 
 ** (4) 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, TITLE AND NON-INFRINGEMENT. IN NO EVENT 
 ** SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE 
 ** FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, 
 ** ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
 ** DEALINGS IN THE SOFTWARE.
 ** 
 ** A copy of the Software is available free of charge at 
 ** https://www.blackmagicdesign.com/desktopvideo_sdk under the EULA.
 ** 
 ** -LICENSE-END-
 */
//
//  GLExtensions.cpp
//  LoopThroughWithOpenGLCompositing
//

#include "GLExtensions.h"

PFNGLGENFRAMEBUFFERSEXTPROC glGenFramebuffersEXT;
PFNGLGENRENDERBUFFERSEXTPROC glGenRenderbuffersEXT;
PFNGLBINDRENDERBUFFEREXTPROC glBindRenderbufferEXT;
PFNGLRENDERBUFFERSTORAGEEXTPROC glRenderbufferStorageEXT;
PFNGLDELETEFRAMEBUFFERSEXTPROC glDeleteFramebuffersEXT;
PFNGLDELETERENDERBUFFERSEXTPROC glDeleteRenderbuffersEXT;
PFNGLBINDFRAMEBUFFEREXTPROC glBindFramebufferEXT;
PFNGLFRAMEBUFFERTEXTURE2DEXTPROC glFramebufferTexture2DEXT;
PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC glFramebufferRenderbufferEXT;
PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC glCheckFramebufferStatusEXT;
PFNGLBLITFRAMEBUFFEREXTPROC glBlitFramebufferEXT;
PFNGLFENCESYNCPROC glFenceSync;
PFNGLCLIENTWAITSYNCPROC glClientWaitSync;
PFNGLDELETESYNCPROC glDeleteSync;
PFNGLGENBUFFERSPROC glGenBuffers;
PFNGLDELETEBUFFERSPROC glDeleteBuffers;
PFNGLBINDBUFFERPROC glBindBuffer;
PFNGLBUFFERDATAPROC glBufferData;
PFNGLCREATESHADERPROC glCreateShader;
PFNGLDELETESHADERPROC glDeleteShader;
PFNGLDELETEPROGRAMPROC glDeleteProgram;
PFNGLSHADERSOURCEPROC glShaderSource;
PFNGLCOMPILESHADERPROC glCompileShader;
PFNGLGETSHADERIVPROC glGetShaderiv;
PFNGLGETSHADERINFOLOGPROC glGetShaderInfoLog;
PFNGLCREATEPROGRAMPROC glCreateProgram;
PFNGLATTACHSHADERPROC glAttachShader;
PFNGLLINKPROGRAMPROC glLinkProgram;
PFNGLGETPROGRAMIVPROC glGetProgramiv;
PFNGLGETPROGRAMINFOLOGPROC glGetProgramInfoLog;
PFNGLUSEPROGRAMPROC glUseProgram;
PFNGLGETUNIFORMLOCATIONPROC glGetUniformLocation;
PFNGLUNIFORM1IPROC glUniform1i;
PFNGLUNIFORM1FPROC glUniform1f;

bool ResolveGLExtensions()
{
	glGenFramebuffersEXT = (PFNGLGENFRAMEBUFFERSEXTPROC) wglGetProcAddress("glGenFramebuffersEXT");
	glGenRenderbuffersEXT = (PFNGLGENRENDERBUFFERSEXTPROC) wglGetProcAddress("glGenRenderbuffersEXT");
	glBindRenderbufferEXT = (PFNGLBINDRENDERBUFFEREXTPROC) wglGetProcAddress("glBindRenderbufferEXT");
	glRenderbufferStorageEXT = (PFNGLRENDERBUFFERSTORAGEEXTPROC) wglGetProcAddress("glRenderbufferStorageEXT");
	glDeleteFramebuffersEXT = (PFNGLDELETEFRAMEBUFFERSEXTPROC) wglGetProcAddress("glDeleteFramebuffersEXT");
	glDeleteRenderbuffersEXT = (PFNGLDELETERENDERBUFFERSEXTPROC) wglGetProcAddress("glDeleteRenderbuffersEXT");
	glBindFramebufferEXT = (PFNGLBINDFRAMEBUFFEREXTPROC) wglGetProcAddress("glBindFramebufferEXT");
	glFramebufferTexture2DEXT = (PFNGLFRAMEBUFFERTEXTURE2DEXTPROC) wglGetProcAddress("glFramebufferTexture2DEXT");
	glFramebufferRenderbufferEXT = (PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC) wglGetProcAddress("glFramebufferRenderbufferEXT");
	glCheckFramebufferStatusEXT = (PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC) wglGetProcAddress("glCheckFramebufferStatusEXT");
	glBlitFramebufferEXT = (PFNGLBLITFRAMEBUFFEREXTPROC) wglGetProcAddress("glBlitFramebufferEXT");
	glFenceSync = (PFNGLFENCESYNCPROC) wglGetProcAddress("glFenceSync");
	glClientWaitSync = (PFNGLCLIENTWAITSYNCPROC) wglGetProcAddress("glClientWaitSync");
	glDeleteSync = (PFNGLDELETESYNCPROC) wglGetProcAddress("glDeleteSync");
	glGenBuffers = (PFNGLGENBUFFERSPROC) wglGetProcAddress("glGenBuffers");
	glDeleteBuffers = (PFNGLDELETEBUFFERSPROC) wglGetProcAddress("glDeleteBuffers");
	glBindBuffer = (PFNGLBINDBUFFERPROC) wglGetProcAddress("glBindBuffer");
	glBufferData = (PFNGLBUFFERDATAPROC) wglGetProcAddress("glBufferData");
	glCreateShader = (PFNGLCREATESHADERPROC) wglGetProcAddress("glCreateShader");
	glDeleteShader = (PFNGLDELETESHADERPROC) wglGetProcAddress("glDeleteShader");
	glDeleteProgram = (PFNGLDELETEPROGRAMPROC) wglGetProcAddress("glDeleteProgram");
	glShaderSource = (PFNGLSHADERSOURCEPROC) wglGetProcAddress("glShaderSource");
	glCompileShader = (PFNGLCOMPILESHADERPROC) wglGetProcAddress("glCompileShader");
	glGetShaderiv = (PFNGLGETSHADERIVPROC) wglGetProcAddress("glGetShaderiv");
	glGetShaderInfoLog = (PFNGLGETSHADERINFOLOGPROC) wglGetProcAddress("glGetShaderInfoLog");
	glCreateProgram = (PFNGLCREATEPROGRAMPROC) wglGetProcAddress("glCreateProgram");
	glAttachShader = (PFNGLATTACHSHADERPROC) wglGetProcAddress("glAttachShader");
	glLinkProgram = (PFNGLLINKPROGRAMPROC) wglGetProcAddress("glLinkProgram");
	glGetProgramiv = (PFNGLGETPROGRAMIVPROC) wglGetProcAddress("glGetProgramiv");
	glGetProgramInfoLog = (PFNGLGETPROGRAMINFOLOGPROC) wglGetProcAddress("glGetProgramInfoLog");
	glUseProgram = (PFNGLUSEPROGRAMPROC) wglGetProcAddress("glUseProgram");
	glGetUniformLocation = (PFNGLGETUNIFORMLOCATIONPROC) wglGetProcAddress("glGetUniformLocation");
	glUniform1i = (PFNGLUNIFORM1IPROC) wglGetProcAddress("glUniform1i");
	glUniform1f = (PFNGLUNIFORM1FPROC) wglGetProcAddress("glUniform1f");

	return	glGenFramebuffersEXT
			&& glGenRenderbuffersEXT
			&& glBindRenderbufferEXT
			&& glRenderbufferStorageEXT
			&& glDeleteFramebuffersEXT
			&& glDeleteRenderbuffersEXT
			&& glBindFramebufferEXT
			&& glFramebufferTexture2DEXT
			&& glFramebufferRenderbufferEXT
			&& glCheckFramebufferStatusEXT
			&& glBlitFramebufferEXT
			&& glFenceSync
			&& glClientWaitSync
			&& glDeleteSync
			&& glGenBuffers
			&& glDeleteBuffers
			&& glBindBuffer
			&& glBufferData
			&& glCreateShader
			&& glDeleteShader
			&& glDeleteProgram
			&& glShaderSource
			&& glCompileShader
			&& glGetShaderiv
			&& glGetShaderInfoLog
			&& glCreateProgram
			&& glAttachShader
			&& glLinkProgram
			&& glGetProgramiv
			&& glGetProgramInfoLog
			&& glUseProgram
			&& glGetUniformLocation
			&& glUniform1i
			&& glUniform1f
			;
}