/*
 *  Copyright (C) 2010 Tieto Corporation.
 *  Copyright (C) 2011 Igalia S.L.
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#ifndef OpenGLShims_h
#define OpenGLShims_h

#if OS(WINDOWS)
#include <GL/gl.h>
#include <GLES2/gl2.h>
#else
#include <GL/gl.h>
#include <GL/glext.h>
#endif

#if defined(GL_ES_VERSION_2_0)
// Some openGL ES systems miss this typedef.
typedef char GLchar;
#endif

typedef struct _OpenGLFunctionTable OpenGLFunctionTable;

namespace WebCore {
bool initializeOpenGLShims();
OpenGLFunctionTable* openGLFunctionTable();
}

#if OS(WINDOWS)
#define GLAPIENTRY __stdcall
typedef char GLchar;
#else
#define GLAPIENTRY
#endif

typedef void (GLAPIENTRY *glActiveTextureType) (GLenum);
typedef void (GLAPIENTRY *glAttachShaderType) (GLuint, GLuint);
typedef void (GLAPIENTRY *glBindAttribLocationType) (GLuint, GLuint, const char*);
typedef void (GLAPIENTRY *glBindBufferType) (GLenum, GLuint);
typedef void (GLAPIENTRY *glBindFramebufferType) (GLenum, GLuint);
typedef void (GLAPIENTRY *glBindRenderbufferType) (GLenum, GLuint);
typedef void (GLAPIENTRY *glBindVertexArrayType) (GLuint);
typedef void (GLAPIENTRY *glBlendColorType) (GLclampf, GLclampf, GLclampf, GLclampf);
typedef void (GLAPIENTRY *glBlendEquationType) (GLenum);
typedef void (GLAPIENTRY *glBlendEquationSeparateType)(GLenum, GLenum);
typedef void (GLAPIENTRY *glBlendFuncSeparateType)(GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha);
typedef void (GLAPIENTRY *glBlitFramebufferType) (GLint, GLint, GLint, GLint, GLint, GLint, GLint, GLint, GLbitfield, GLenum);
typedef void (GLAPIENTRY *glBufferDataType) (GLenum, GLsizeiptr, const GLvoid*, GLenum);
typedef void (GLAPIENTRY *glBufferSubDataType) (GLenum, GLintptr, GLsizeiptr, const GLvoid*);
typedef GLenum (GLAPIENTRY *glCheckFramebufferStatusType) (GLenum);
typedef void (GLAPIENTRY *glCompileShaderType) (GLuint);
typedef void (GLAPIENTRY *glCompressedTexImage2DType) (GLenum, GLint, GLenum, GLsizei, GLsizei, GLint, GLsizei, const GLvoid*);
typedef void (GLAPIENTRY *glCompressedTexSubImage2DType) (GLenum, GLint, GLint, GLint, GLsizei, GLsizei, GLenum, GLsizei, const GLvoid*);
typedef GLuint (GLAPIENTRY *glCreateProgramType) ();
typedef GLuint (GLAPIENTRY *glCreateShaderType) (GLenum);
typedef void (GLAPIENTRY *glDeleteBuffersType) (GLsizei, const GLuint*);
typedef void (GLAPIENTRY *glDeleteFramebuffersType) (GLsizei n, const GLuint*);
typedef void (GLAPIENTRY *glDeleteProgramType) (GLuint);
typedef void (GLAPIENTRY *glDeleteRenderbuffersType) (GLsizei n, const GLuint*);
typedef void (GLAPIENTRY *glDeleteShaderType) (GLuint);
typedef void (GLAPIENTRY *glDeleteVertexArraysType) (GLsizei, const GLuint*);
typedef void (GLAPIENTRY *glDetachShaderType) (GLuint, GLuint);
typedef void (GLAPIENTRY *glDisableVertexAttribArrayType) (GLuint);
typedef void (GLAPIENTRY *glDrawArraysInstancedType) (GLenum, GLint, GLsizei, GLsizei);
typedef void (GLAPIENTRY *glDrawBuffersType) (GLsizei, const GLenum*);
typedef void (GLAPIENTRY *glDrawElementsInstancedType) (GLenum, GLsizei, GLenum, const GLvoid*, GLsizei);
typedef void (GLAPIENTRY *glEnableVertexAttribArrayType) (GLuint);
typedef void (GLAPIENTRY *glFramebufferRenderbufferType) (GLenum, GLenum, GLenum, GLuint);
typedef void (GLAPIENTRY *glFramebufferTexture2DType) (GLenum, GLenum, GLenum, GLuint, GLint);
typedef void (GLAPIENTRY *glGenBuffersType) (GLsizei, GLuint*);
typedef void (GLAPIENTRY *glGenerateMipmapType) (GLenum target);
typedef void (GLAPIENTRY *glGenFramebuffersType) (GLsizei, GLuint*);
typedef void (GLAPIENTRY *glGenRenderbuffersType) (GLsizei, GLuint*);
typedef void (GLAPIENTRY *glGenVertexArraysType) (GLsizei, GLuint*);
typedef void (GLAPIENTRY *glGetActiveAttribType) (GLuint, GLuint, GLsizei, GLsizei*, GLint*, GLenum*, GLchar*);
typedef void (GLAPIENTRY *glGetActiveUniformType) (GLuint, GLuint, GLsizei, GLsizei*, GLint*, GLenum*, GLchar*);
typedef void (GLAPIENTRY *glGetAttachedShadersType) (GLuint, GLsizei, GLsizei*, GLuint*);
typedef GLint (GLAPIENTRY *glGetAttribLocationType) (GLuint, const char*);
typedef void (GLAPIENTRY *glGetBufferParameterivType) (GLenum, GLenum, GLint*);
typedef void (GLAPIENTRY *glGetFramebufferAttachmentParameterivType) (GLenum, GLenum, GLenum, GLint* params);
typedef void (GLAPIENTRY *glGetProgramInfoLogType) (GLuint, GLsizei, GLsizei*, char*);
typedef void (GLAPIENTRY *glGetProgramivType) (GLuint, GLenum, GLint*);
typedef void (GLAPIENTRY *glGetRenderbufferParameterivType) (GLenum, GLenum, GLint*);
typedef void (GLAPIENTRY *glGetShaderInfoLogType) (GLuint, GLsizei, GLsizei*, char*);
typedef void (GLAPIENTRY *glGetShaderivType) (GLuint, GLenum, GLint*);
typedef void (GLAPIENTRY *glGetShaderSourceType) (GLuint, GLsizei, GLsizei*, char*);
typedef const GLubyte* (GLAPIENTRY *glGetStringType) (GLenum);
typedef const GLubyte* (GLAPIENTRY *glGetStringiType) (GLenum, GLuint);
typedef GLint (GLAPIENTRY *glGetUniformLocationType) (GLuint, const char*);
typedef void (GLAPIENTRY *glGetUniformfvType) (GLuint, GLint, GLfloat*);
typedef void (GLAPIENTRY *glGetUniformivType) (GLuint, GLint, GLint*);
typedef void (GLAPIENTRY *glGetVertexAttribfvType) (GLuint, GLenum, GLfloat*);
typedef void (GLAPIENTRY *glGetVertexAttribivType) (GLuint, GLenum, GLint*);
typedef void (GLAPIENTRY *glGetVertexAttribPointervType) (GLuint, GLenum, GLvoid**);
typedef GLboolean (GLAPIENTRY *glIsBufferType) (GLuint);
typedef GLboolean (GLAPIENTRY *glIsFramebufferType) (GLuint);
typedef GLboolean (GLAPIENTRY *glIsProgramType) (GLuint);
typedef GLboolean (GLAPIENTRY *glIsRenderbufferType) (GLuint);
typedef GLboolean (GLAPIENTRY *glIsShaderType) (GLuint);
typedef GLboolean (GLAPIENTRY *glIsVertexArrayType) (GLuint);
typedef void (GLAPIENTRY *glLinkProgramType) (GLuint);
typedef void (GLAPIENTRY *glRenderbufferStorageType) (GLenum, GLenum, GLsizei, GLsizei);
typedef void (GLAPIENTRY *glRenderbufferStorageMultisampleType) (GLenum, GLsizei, GLenum, GLsizei, GLsizei);
typedef void (GLAPIENTRY *glSampleCoverageType) (GLclampf, GLboolean);
typedef void (GLAPIENTRY *glShaderSourceType) (GLuint, GLsizei, const char**, const GLint*);
typedef void (GLAPIENTRY *glStencilFuncSeparateType) (GLenum, GLenum, GLint, GLuint);
typedef void (GLAPIENTRY *glStencilMaskSeparateType) (GLenum, GLuint);
typedef void (GLAPIENTRY *glStencilOpSeparateType) (GLenum, GLenum, GLenum, GLenum);
typedef void (GLAPIENTRY *glUniform1fType) (GLint, GLfloat);
typedef void (GLAPIENTRY *glUniform1fvType) (GLint, GLsizei, const GLfloat*);
typedef void (GLAPIENTRY *glUniform1iType) (GLint, GLint);
typedef void (GLAPIENTRY *glUniform1ivType) (GLint, GLsizei, const GLint*);
typedef void (GLAPIENTRY *glUniform2fType) (GLint, GLfloat, GLfloat);
typedef void (GLAPIENTRY *glUniform2fvType) (GLint, GLsizei, const GLfloat*);
typedef void (GLAPIENTRY *glUniform2iType) (GLint, GLint, GLint);
typedef void (GLAPIENTRY *glUniform2ivType) (GLint, GLsizei, const GLint*);
typedef void (GLAPIENTRY *glUniform3fType) (GLint, GLfloat, GLfloat, GLfloat);
typedef void (GLAPIENTRY *glUniform3fvType) (GLint, GLsizei, const GLfloat*);
typedef void (GLAPIENTRY *glUniform3iType) (GLint, GLint, GLint, GLint);
typedef void (GLAPIENTRY *glUniform3ivType) (GLint, GLsizei, const GLint*);
typedef void (GLAPIENTRY *glUniform4fType) (GLint, GLfloat, GLfloat, GLfloat, GLfloat);
typedef void (GLAPIENTRY *glUniform4fvType) (GLint, GLsizei, const GLfloat*);
typedef void (GLAPIENTRY *glUniform4iType) (GLint, GLint, GLint, GLint, GLint);
typedef void (GLAPIENTRY *glUniform4ivType) (GLint, GLsizei, const GLint*);
typedef void (GLAPIENTRY *glUniformMatrix2fvType) (GLint, GLsizei, GLboolean, const GLfloat*);
typedef void (GLAPIENTRY *glUniformMatrix3fvType) (GLint, GLsizei, GLboolean, const GLfloat*);
typedef void (GLAPIENTRY *glUniformMatrix4fvType) (GLint, GLsizei, GLboolean, const GLfloat*);
typedef void (GLAPIENTRY *glUseProgramType) (GLuint);
typedef void (GLAPIENTRY *glValidateProgramType) (GLuint);
typedef void (GLAPIENTRY *glVertexAttrib1fType) (GLuint, const GLfloat);
typedef void (GLAPIENTRY *glVertexAttrib1fvType) (GLuint, const GLfloat*);
typedef void (GLAPIENTRY *glVertexAttrib2fType) (GLuint, const GLfloat, const GLfloat);
typedef void (GLAPIENTRY *glVertexAttrib2fvType) (GLuint, const GLfloat*);
typedef void (GLAPIENTRY *glVertexAttrib3fType) (GLuint, const GLfloat, const GLfloat, const GLfloat);
typedef void (GLAPIENTRY *glVertexAttrib3fvType) (GLuint, const GLfloat*);
typedef void (GLAPIENTRY *glVertexAttrib4fType) (GLuint, const GLfloat, const GLfloat, const GLfloat, const GLfloat);
typedef void (GLAPIENTRY *glVertexAttrib4fvType) (GLuint, const GLfloat*);
typedef void (GLAPIENTRY *glVertexAttribDivisorType) (GLuint, GLuint);
typedef void (GLAPIENTRY *glVertexAttribPointerType) (GLuint, GLint, GLenum, GLboolean, GLsizei, const GLvoid*);

#define FUNCTION_TABLE_ENTRY(FunctionName) FunctionName##Type FunctionName

typedef struct _OpenGLFunctionTable {
    FUNCTION_TABLE_ENTRY(glActiveTexture);
    FUNCTION_TABLE_ENTRY(glAttachShader);
    FUNCTION_TABLE_ENTRY(glBindAttribLocation);
    FUNCTION_TABLE_ENTRY(glBindBuffer);
    FUNCTION_TABLE_ENTRY(glBindFramebuffer);
    FUNCTION_TABLE_ENTRY(glBindRenderbuffer);
    FUNCTION_TABLE_ENTRY(glBindVertexArray);
    FUNCTION_TABLE_ENTRY(glBlendColor);
    FUNCTION_TABLE_ENTRY(glBlendEquation);
    FUNCTION_TABLE_ENTRY(glBlendEquationSeparate);
    FUNCTION_TABLE_ENTRY(glBlendFuncSeparate);
    FUNCTION_TABLE_ENTRY(glBlitFramebuffer);
    FUNCTION_TABLE_ENTRY(glBufferData);
    FUNCTION_TABLE_ENTRY(glBufferSubData);
    FUNCTION_TABLE_ENTRY(glCheckFramebufferStatus);
    FUNCTION_TABLE_ENTRY(glCompileShader);
    FUNCTION_TABLE_ENTRY(glCompressedTexImage2D);
    FUNCTION_TABLE_ENTRY(glCompressedTexSubImage2D);
    FUNCTION_TABLE_ENTRY(glCreateProgram);
    FUNCTION_TABLE_ENTRY(glCreateShader);
    FUNCTION_TABLE_ENTRY(glDeleteBuffers);
    FUNCTION_TABLE_ENTRY(glDeleteFramebuffers);
    FUNCTION_TABLE_ENTRY(glDeleteProgram);
    FUNCTION_TABLE_ENTRY(glDeleteRenderbuffers);
    FUNCTION_TABLE_ENTRY(glDeleteShader);
    FUNCTION_TABLE_ENTRY(glDeleteVertexArrays);
    FUNCTION_TABLE_ENTRY(glDetachShader);
    FUNCTION_TABLE_ENTRY(glDisableVertexAttribArray);
    FUNCTION_TABLE_ENTRY(glDrawArraysInstanced);
    FUNCTION_TABLE_ENTRY(glDrawBuffers);
    FUNCTION_TABLE_ENTRY(glDrawElementsInstanced);
    FUNCTION_TABLE_ENTRY(glEnableVertexAttribArray);
    FUNCTION_TABLE_ENTRY(glFramebufferRenderbuffer);
    FUNCTION_TABLE_ENTRY(glFramebufferTexture2D);
    FUNCTION_TABLE_ENTRY(glGenBuffers);
    FUNCTION_TABLE_ENTRY(glGenerateMipmap);
    FUNCTION_TABLE_ENTRY(glGenFramebuffers);
    FUNCTION_TABLE_ENTRY(glGenRenderbuffers);
    FUNCTION_TABLE_ENTRY(glGenVertexArrays);
    FUNCTION_TABLE_ENTRY(glGetActiveAttrib);
    FUNCTION_TABLE_ENTRY(glGetActiveUniform);
    FUNCTION_TABLE_ENTRY(glGetAttachedShaders);
    FUNCTION_TABLE_ENTRY(glGetAttribLocation);
    FUNCTION_TABLE_ENTRY(glGetBufferParameteriv);
    FUNCTION_TABLE_ENTRY(glGetFramebufferAttachmentParameteriv);
    FUNCTION_TABLE_ENTRY(glGetProgramInfoLog);
    FUNCTION_TABLE_ENTRY(glGetProgramiv);
    FUNCTION_TABLE_ENTRY(glGetRenderbufferParameteriv);
    FUNCTION_TABLE_ENTRY(glGetShaderInfoLog);
    FUNCTION_TABLE_ENTRY(glGetShaderiv);
    FUNCTION_TABLE_ENTRY(glGetShaderSource);
    FUNCTION_TABLE_ENTRY(glGetString);
    FUNCTION_TABLE_ENTRY(glGetStringi);
    FUNCTION_TABLE_ENTRY(glGetUniformfv);
    FUNCTION_TABLE_ENTRY(glGetUniformiv);
    FUNCTION_TABLE_ENTRY(glGetUniformLocation);
    FUNCTION_TABLE_ENTRY(glGetVertexAttribfv);
    FUNCTION_TABLE_ENTRY(glGetVertexAttribiv);
    FUNCTION_TABLE_ENTRY(glGetVertexAttribPointerv);
    FUNCTION_TABLE_ENTRY(glIsBuffer);
    FUNCTION_TABLE_ENTRY(glIsFramebuffer);
    FUNCTION_TABLE_ENTRY(glIsProgram);
    FUNCTION_TABLE_ENTRY(glIsRenderbuffer);
    FUNCTION_TABLE_ENTRY(glIsShader);
    FUNCTION_TABLE_ENTRY(glIsVertexArray);
    FUNCTION_TABLE_ENTRY(glLinkProgram);
    FUNCTION_TABLE_ENTRY(glRenderbufferStorage);
    FUNCTION_TABLE_ENTRY(glRenderbufferStorageMultisample);
    FUNCTION_TABLE_ENTRY(glSampleCoverage);
    FUNCTION_TABLE_ENTRY(glShaderSource);
    FUNCTION_TABLE_ENTRY(glStencilFuncSeparate);
    FUNCTION_TABLE_ENTRY(glStencilMaskSeparate);
    FUNCTION_TABLE_ENTRY(glStencilOpSeparate);
    FUNCTION_TABLE_ENTRY(glUniform1f);
    FUNCTION_TABLE_ENTRY(glUniform1fv);
    FUNCTION_TABLE_ENTRY(glUniform1i);
    FUNCTION_TABLE_ENTRY(glUniform1iv);
    FUNCTION_TABLE_ENTRY(glUniform2f);
    FUNCTION_TABLE_ENTRY(glUniform2fv);
    FUNCTION_TABLE_ENTRY(glUniform2i);
    FUNCTION_TABLE_ENTRY(glUniform2iv);
    FUNCTION_TABLE_ENTRY(glUniform3f);
    FUNCTION_TABLE_ENTRY(glUniform3fv);
    FUNCTION_TABLE_ENTRY(glUniform3i);
    FUNCTION_TABLE_ENTRY(glUniform3iv);
    FUNCTION_TABLE_ENTRY(glUniform4f);
    FUNCTION_TABLE_ENTRY(glUniform4fv);
    FUNCTION_TABLE_ENTRY(glUniform4i);
    FUNCTION_TABLE_ENTRY(glUniform4iv);
    FUNCTION_TABLE_ENTRY(glUniformMatrix2fv);
    FUNCTION_TABLE_ENTRY(glUniformMatrix3fv);
    FUNCTION_TABLE_ENTRY(glUniformMatrix4fv);
    FUNCTION_TABLE_ENTRY(glUseProgram);
    FUNCTION_TABLE_ENTRY(glValidateProgram);
    FUNCTION_TABLE_ENTRY(glVertexAttrib1f);
    FUNCTION_TABLE_ENTRY(glVertexAttrib1fv);
    FUNCTION_TABLE_ENTRY(glVertexAttrib2f);
    FUNCTION_TABLE_ENTRY(glVertexAttrib2fv);
    FUNCTION_TABLE_ENTRY(glVertexAttrib3f);
    FUNCTION_TABLE_ENTRY(glVertexAttrib3fv);
    FUNCTION_TABLE_ENTRY(glVertexAttrib4f);
    FUNCTION_TABLE_ENTRY(glVertexAttrib4fv);
    FUNCTION_TABLE_ENTRY(glVertexAttribDivisor);
    FUNCTION_TABLE_ENTRY(glVertexAttribPointer);
} OpenGLFunctionTable;

// We disable the shims for OpenGLShims.cpp, so that we can set them.
#ifndef DISABLE_SHIMS
#define LOOKUP_GL_FUNCTION(Function) WebCore::openGLFunctionTable()->Function
#define glActiveTexture                        LOOKUP_GL_FUNCTION(glActiveTexture)
#define glAttachShader                         LOOKUP_GL_FUNCTION(glAttachShader)
#define glBindAttribLocation                   LOOKUP_GL_FUNCTION(glBindAttribLocation)
#define glBindBuffer                           LOOKUP_GL_FUNCTION(glBindBuffer)
#define glBindFramebufferEXT                   glBindFramebuffer
#define glBindFramebuffer                      LOOKUP_GL_FUNCTION(glBindFramebuffer)
#define glBindRenderbufferEXT                  glBindRenderbuffer
#define glBindRenderbuffer                     LOOKUP_GL_FUNCTION(glBindRenderbuffer)
#define glBindVertexArrayOES                   glBindVertexArray
#define glBindVertexArray                      LOOKUP_GL_FUNCTION(glBindVertexArray)
#define glBlendColor                           LOOKUP_GL_FUNCTION(glBlendColor)
#define glBlendEquation                        LOOKUP_GL_FUNCTION(glBlendEquation)
#define glBlendEquationSeparate                LOOKUP_GL_FUNCTION(glBlendEquationSeparate)
#define glBlendFuncSeparate                    LOOKUP_GL_FUNCTION(glBlendFuncSeparate)
#define glBlitFramebufferEXT                   glBlitFramebuffer
#define glBlitFramebuffer                      LOOKUP_GL_FUNCTION(glBlitFramebuffer)
#define glBufferData                           LOOKUP_GL_FUNCTION(glBufferData)
#define glBufferSubData                        LOOKUP_GL_FUNCTION(glBufferSubData)
#define glCheckFramebufferStatusEXT            glCheckFramebufferStatus
#define glCheckFramebufferStatus               LOOKUP_GL_FUNCTION(glCheckFramebufferStatus)
#define glCompileShader                        LOOKUP_GL_FUNCTION(glCompileShader)
#define glCompressedTexImage2D                 LOOKUP_GL_FUNCTION(glCompressedTexImage2D)
#define glCompressedTexSubImage2D              LOOKUP_GL_FUNCTION(glCompressedTexSubImage2D)
#define glCreateProgram                        LOOKUP_GL_FUNCTION(glCreateProgram)
#define glCreateShader                         LOOKUP_GL_FUNCTION(glCreateShader)
#define glDeleteBuffers                        LOOKUP_GL_FUNCTION(glDeleteBuffers)
#define glDeleteFramebuffersEXT                glDeleteFramebuffers
#define glDeleteFramebuffers                   LOOKUP_GL_FUNCTION(glDeleteFramebuffers)
#define glDeleteProgram                        LOOKUP_GL_FUNCTION(glDeleteProgram)
#define glDeleteRenderbuffersEXT               glDeleteRenderbuffers
#define glDeleteRenderbuffers                  LOOKUP_GL_FUNCTION(glDeleteRenderbuffers)
#define glDeleteShader                         LOOKUP_GL_FUNCTION(glDeleteShader)
#define glDeleteVertexArraysOES                glDeleteVertexArrays
#define glDeleteVertexArrays                   LOOKUP_GL_FUNCTION(glDeleteVertexArrays)
#define glDetachShader                         LOOKUP_GL_FUNCTION(glDetachShader)
#define glDisableVertexAttribArray             LOOKUP_GL_FUNCTION(glDisableVertexAttribArray)
#define glDrawArraysInstancedEXT               glDrawArraysInstanced
#define glDrawArraysInstanced                  LOOKUP_GL_FUNCTION(glDrawArraysInstanced)
#define glDrawBuffersEXT                       glDrawBuffers
#define glDrawBuffers                          LOOKUP_GL_FUNCTION(glDrawBuffers)
#define glDrawElementsInstancedEXT             glDrawElementsInstanced
#define glDrawElementsInstanced                LOOKUP_GL_FUNCTION(glDrawElementsInstanced)
#define glEnableVertexAttribArray              LOOKUP_GL_FUNCTION(glEnableVertexAttribArray)
#define glFramebufferRenderbufferEXT           glFramebufferRenderbuffer
#define glFramebufferRenderbuffer              LOOKUP_GL_FUNCTION(glFramebufferRenderbuffer)
#define glFramebufferTexture2DEXT              glFramebufferTexture2D
#define glFramebufferTexture2D                 LOOKUP_GL_FUNCTION(glFramebufferTexture2D)
#define glGenBuffers                           LOOKUP_GL_FUNCTION(glGenBuffers)
#define glGenerateMipmapEXT                    glGenerateMipmap
#define glGenerateMipmap                       LOOKUP_GL_FUNCTION(glGenerateMipmap)
#define glGenFramebuffersEXT                   glGenFramebuffers
#define glGenFramebuffers                      LOOKUP_GL_FUNCTION(glGenFramebuffers)
#define glGenRenderbuffersEXT                  glGenRenderbuffers
#define glGenRenderbuffers                     LOOKUP_GL_FUNCTION(glGenRenderbuffers)
#define glGenVertexArraysOES                   glGenVertexArrays;
#define glGenVertexArrays                      LOOKUP_GL_FUNCTION(glGenVertexArrays)
#define glGetActiveAttrib                      LOOKUP_GL_FUNCTION(glGetActiveAttrib)
#define glGetActiveUniform                     LOOKUP_GL_FUNCTION(glGetActiveUniform)
#define glGetAttachedShaders                   LOOKUP_GL_FUNCTION(glGetAttachedShaders)
#define glGetAttribLocation                    LOOKUP_GL_FUNCTION(glGetAttribLocation)
#define glGetBufferParameterivEXT              glGetBufferParameteriv
#define glGetBufferParameteriv                 LOOKUP_GL_FUNCTION(glGetBufferParameteriv)
#define glGetFramebufferAttachmentParameterivEXT glGetFramebufferAttachmentParameteriv
#define glGetFramebufferAttachmentParameteriv  LOOKUP_GL_FUNCTION(glGetFramebufferAttachmentParameteriv)
#define glGetProgramInfoLog                    LOOKUP_GL_FUNCTION(glGetProgramInfoLog)
#define glGetProgramiv                         LOOKUP_GL_FUNCTION(glGetProgramiv)
#define glGetRenderbufferParameterivEXT        glGetRenderbufferParameteriv
#define glGetRenderbufferParameteriv           LOOKUP_GL_FUNCTION(glGetRenderbufferParameteriv)
#define glGetShaderInfoLog                     LOOKUP_GL_FUNCTION(glGetShaderInfoLog)
#define glGetShaderiv                          LOOKUP_GL_FUNCTION(glGetShaderiv)
#define glGetShaderSource                      LOOKUP_GL_FUNCTION(glGetShaderSource)
#define glGetString                            LOOKUP_GL_FUNCTION(glGetString)
#define glGetStringi                           LOOKUP_GL_FUNCTION(glGetStringi)
#define glGetUniformfv                         LOOKUP_GL_FUNCTION(glGetUniformfv)
#define glGetUniformiv                         LOOKUP_GL_FUNCTION(glGetUniformiv)
#define glGetUniformLocation                   LOOKUP_GL_FUNCTION(glGetUniformLocation)
#define glGetVertexAttribfv                    LOOKUP_GL_FUNCTION(glGetVertexAttribfv)
#define glGetVertexAttribiv                    LOOKUP_GL_FUNCTION(glGetVertexAttribiv)
#define glGetVertexAttribPointerv              LOOKUP_GL_FUNCTION(glGetVertexAttribPointerv)
#define glIsBuffer                             LOOKUP_GL_FUNCTION(glIsBuffer)
#define glIsFramebufferEXT                     glIsFramebuffer
#define glIsFramebuffer                        LOOKUP_GL_FUNCTION(glIsFramebuffer)
#define glIsProgram                            LOOKUP_GL_FUNCTION(glIsProgram)
#define glIsRenderbufferEXT                    glIsRenderbuffer
#define glIsRenderbuffer                       LOOKUP_GL_FUNCTION(glIsRenderbuffer)
#define glIsShader                             LOOKUP_GL_FUNCTION(glIsShader)
#define glIsVertexArrayOES                     glIsVertexArray;
#define glIsVertexArray                        LOOKUP_GL_FUNCTION(glIsVertexArray)
#define glLinkProgram                          LOOKUP_GL_FUNCTION(glLinkProgram)
#define glRenderbufferStorageEXT               glRenderbufferStorage
#define glRenderbufferStorage                  LOOKUP_GL_FUNCTION(glRenderbufferStorage)
#define glRenderbufferStorageMultisampleEXT    glRenderbufferStorageMultisample
#define glRenderbufferStorageMultisample       LOOKUP_GL_FUNCTION(glRenderbufferStorageMultisample)
#define glSampleCoverage                       LOOKUP_GL_FUNCTION(glSampleCoverage)
#define glShaderSource                         LOOKUP_GL_FUNCTION(glShaderSource)
#define glStencilFuncSeparate                  LOOKUP_GL_FUNCTION(glStencilFuncSeparate)
#define glStencilMaskSeparate                  LOOKUP_GL_FUNCTION(glStencilMaskSeparate)
#define glStencilOpSeparate                    LOOKUP_GL_FUNCTION(glStencilOpSeparate)
#define glUniform1f                            LOOKUP_GL_FUNCTION(glUniform1f)
#define glUniform1fv                           LOOKUP_GL_FUNCTION(glUniform1fv)
#define glUniform1i                            LOOKUP_GL_FUNCTION(glUniform1i)
#define glUniform1iv                           LOOKUP_GL_FUNCTION(glUniform1iv)
#define glUniform2f                            LOOKUP_GL_FUNCTION(glUniform2f)
#define glUniform2fv                           LOOKUP_GL_FUNCTION(glUniform2fv)
#define glUniform2i                            LOOKUP_GL_FUNCTION(glUniform2i)
#define glUniform2iv                           LOOKUP_GL_FUNCTION(glUniform2iv)
#define glUniform3f                            LOOKUP_GL_FUNCTION(glUniform3f)
#define glUniform3fv                           LOOKUP_GL_FUNCTION(glUniform3fv)
#define glUniform3i                            LOOKUP_GL_FUNCTION(glUniform3i)
#define glUniform3iv                           LOOKUP_GL_FUNCTION(glUniform3iv)
#define glUniform4f                            LOOKUP_GL_FUNCTION(glUniform4f)
#define glUniform4fv                           LOOKUP_GL_FUNCTION(glUniform4fv)
#define glUniform4i                            LOOKUP_GL_FUNCTION(glUniform4i)
#define glUniform4iv                           LOOKUP_GL_FUNCTION(glUniform4iv)
#define glUniformMatrix2fv                     LOOKUP_GL_FUNCTION(glUniformMatrix2fv)
#define glUniformMatrix3fv                     LOOKUP_GL_FUNCTION(glUniformMatrix3fv)
#define glUniformMatrix4fv                     LOOKUP_GL_FUNCTION(glUniformMatrix4fv)
#define glUseProgram                           LOOKUP_GL_FUNCTION(glUseProgram)
#define glValidateProgram                      LOOKUP_GL_FUNCTION(glValidateProgram)
#define glVertexAttrib1f                       LOOKUP_GL_FUNCTION(glVertexAttrib1f)
#define glVertexAttrib1fv                      LOOKUP_GL_FUNCTION(glVertexAttrib1fv)
#define glVertexAttrib2f                       LOOKUP_GL_FUNCTION(glVertexAttrib2f)
#define glVertexAttrib2fv                      LOOKUP_GL_FUNCTION(glVertexAttrib2fv)
#define glVertexAttrib3f                       LOOKUP_GL_FUNCTION(glVertexAttrib3f)
#define glVertexAttrib3fv                      LOOKUP_GL_FUNCTION(glVertexAttrib3fv)
#define glVertexAttrib4f                       LOOKUP_GL_FUNCTION(glVertexAttrib4f)
#define glVertexAttrib4fv                      LOOKUP_GL_FUNCTION(glVertexAttrib4fv)
#define glVertexAttribDivisorEXT               glVertexAttribDivisor
#define glVertexAttribDivisor                  LOOKUP_GL_FUNCTION(glVertexAttribDivisor)
#define glVertexAttribPointer                  LOOKUP_GL_FUNCTION(glVertexAttribPointer)
#endif

#endif