gropenglextension.h

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/*
 * Copyright (C) Volition, Inc. 1999.  All rights reserved.
 *
 * All source code herein is the property of Volition, Inc. You may not sell 
 * or otherwise commercially exploit the source or things you created based on the 
 * source.
 *
*/



#ifndef _GROPENGLEXT_H
#define _GROPENGLEXT_H

#include "globalincs/pstypes.h"
#include "graphics/gropengl.h"

//EXTENSIONS!!!!
//be sure to check for this at startup and handle not finding it gracefully

//to add extensions/functions:
//define an index after the last one, either an extension or a function
//increment NUM_OGL_EXTENSIONS if an extension or NUM_OGL_FUNCTIONS if function
//add function macro for Win32
//add function info to GL_Functions struct
//the structure of extensions/functions are located in gropenglextension.cpp

typedef struct ogl_extension {
        bool required_to_run;
        bool enabled;
        int num_extensions;
        const char *extension_name[3];
        int num_functions;
        const char *function_names[20];
} ogl_extension;

typedef struct ogl_function {
        const char *function_name;
        ptr_u function_ptr;
} ogl_function;

extern ogl_function GL_Functions[];
extern ogl_extension GL_Extensions[];
extern ogl_function GL_EXT_Special[];


// Extensions
#define OGL_EXT_FOG_COORD                                       0
#define OGL_ARB_MULTITEXTURE                            1
#define OGL_ARB_TEXTURE_ENV_ADD                 2
#define OGL_ARB_TEXTURE_COMPRESSION             3
#define OGL_EXT_TEXTURE_COMPRESSION_S3TC        4
#define OGL_EXT_TEXTURE_FILTER_ANISOTROPIC      5
//#define OGL_NV_FOG_DISTANCE                           6
//#define OGL_EXT_SECONDARY_COLOR                       7
#define OGL_ARB_TEXTURE_ENV_COMBINE             6
#define OGL_EXT_COMPILED_VERTEX_ARRAY           7
//#define OGL_ARB_TRANSPOSE_MATRIX              10
#define OGL_EXT_DRAW_RANGE_ELEMENTS             8
#define OGL_ARB_TEXTURE_MIRRORED_REPEAT 9
#define OGL_ARB_TEXTURE_NON_POWER_OF_TWO        10
#define OGL_ARB_VERTEX_BUFFER_OBJECT            11
#define OGL_ARB_PIXEL_BUFFER_OBJECT             12
#define OGL_SGIS_GENERATE_MIPMAP                        13
#define OGL_EXT_FRAMEBUFFER_OBJECT                      14
#define OGL_ARB_TEXTURE_RECTANGLE                       15
#define OGL_EXT_BGRA                                            16
#define OGL_ARB_TEXTURE_CUBE_MAP                        17
#define OGL_EXT_TEXTURE_LOD_BIAS                        18
#define OGL_ARB_POINT_SPRITE                            19
#define OGL_ARB_SHADING_LANGUAGE_100            20
#define OGL_ARB_SHADER_OBJECTS                          21
#define OGL_ARB_VERTEX_SHADER                           22
#define OGL_ARB_FRAGMENT_SHADER                         23
#define OGL_SM30                                                        24
#define OGL_ARB_FLOATING_POINT_TEXTURES         25
#define OGL_ARB_DRAW_ELEMENTS_BASE_VERTEX       26
#define OGL_EXT_FRAMEBUFFER_BLIT                        27
#define OGL_EXT_GEOMETRY_SHADER4                        28
#define OGL_EXT_TEXTURE_ARRAY                           29
#define OGL_ARB_UNIFORM_BUFFER_OBJECT           30
#define OGL_EXT_TRANSFORM_FEEDBACK                      31
#define OGL_ARB_DRAW_INSTANCED                          32
#define OGL_ARB_TEXTURE_BUFFER                          33

#define NUM_OGL_EXTENSIONS                                      34


// Functions
#define OGL_FOG_COORDF                                          0                       // for better looking fog
#define OGL_FOG_COORD_POINTER                           1                       // used with vertex arrays
#define OGL_MULTI_TEX_COORD_2F                          2                       // multitex coordinates
#define OGL_ACTIVE_TEXTURE                                      3                       // currenly active multitexture
#define OGL_CLIENT_ACTIVE_TEXTURE                       4
#define OGL_COMPRESSED_TEX_IMAGE_2D                     5                       // 2d compressed texture
#define OGL_COMPRESSED_TEX_SUB_IMAGE_2D         6                       // 2d compressed sub texture
#define OGL_GET_COMPRESSED_TEX_IMAGE            7
//#define OGL_SECONDARY_COLOR_3FV                       8                       // for better looking fog
//#define OGL_SECONDARY_COLOR_3UBV                      9                       // specular
#define OGL_LOCK_ARRAYS                                         8                       // HTL
#define OGL_UNLOCK_ARRAYS                                       9                       // HTL
//#define OGL_LOAD_TRANSPOSE_MATRIX_F           12                      
//#define OGL_MULT_TRANSPOSE_MATRIX_F           13
#define OGL_DRAW_RANGE_ELEMENTS                         10
#define OGL_BIND_BUFFER                                         11
#define OGL_DELETE_BUFFERS                                      12
#define OGL_GEN_BUFFERS                                         13
#define OGL_BUFFER_DATA                                         14
#define OGL_BUFFER_SUB_DATA                                     15
#define OGL_MAP_BUFFER                                          16
#define OGL_UNMAP_BUFFER                                        17
#define OGL_IS_RENDERBUFFER                                     18
#define OGL_BIND_RENDERBUFFER                           19
#define OGL_DELETE_RENDERBUFFERS                        20
#define OGL_GEN_RENDERBUFFERS                           21
#define OGL_RENDERBUFFER_STORAGE                        22
#define OGL_GET_RENDERBUFFER_PARAMETER_IV       23
#define OGL_IS_FRAMEBUFFER                                      24
#define OGL_BIND_FRAMEBUFFER                            25
#define OGL_DELETE_FRAMEBUFFERS                         26
#define OGL_GEN_FRAMEBUFFERS                            27
#define OGL_CHECK_FRAMEBUFFER_STATUS            28
#define OGL_FRAMEBUFFER_TEXTURE_2D                      29
#define OGL_FRAMEBUFFER_RENDERBUFFER            30
#define OGL_GET_FRAMEBUFFER_ATTACHMENT_PARAMETER_IV             31
#define OGL_GENERATE_MIPMAP                                     32
#define OGL_DELETE_OBJECT                                       33
#define OGL_CREATE_SHADER_OBJECT                        34
#define OGL_SHADER_SOURCE                                       35
#define OGL_COMPILE_SHADER                                      36
#define OGL_GET_OBJECT_PARAMETERIV                      37
#define OGL_GET_INFO_LOG                                        38
#define OGL_CREATE_PROGRAM_OBJECT                       39
#define OGL_ATTACH_OBJECT                                       40
#define OGL_LINK_PROGRAM                                        41
#define OGL_USE_PROGRAM_OBJECT                          42
#define OGL_VALIDATE_PROGRAM                            43
#define OGL_ENABLE_VERTEX_ATTRIB_ARRAY          44
#define OGL_DISABLE_VERTEX_ATTRIB_ARRAY         45
#define OGL_GET_ATTRIB_LOCATION                         46
#define OGL_VERTEX_ATTRIB_POINTER                       47
#define OGL_GET_UNIFORM_LOCATION                        48
#define OGL_GET_UNIFORMIV                                       49
#define OGL_UNIFORM1F                                           50
#define OGL_UNIFORM2F                                           51
#define OGL_UNIFORM3F                                           52
#define OGL_UNIFORM4F                                           53
#define OGL_UNIFORM3FV                                          54
#define OGL_UNIFORM4FV                                          55
#define OGL_UNIFORM1I                                           56
#define OGL_UNIFORM_MATRIX4FV                           57
#define OGL_DRAWBUFFERS                                         58
#define OGL_DRAW_ELEMENTS_BASE_VERTEX                           59
#define OGL_DRAW_RANGE_ELEMENTS_BASE_VERTEX                     60
#define OGL_DRAW_ELEMENTS_INSTANCED_BASE_VERTEX         61
#define OGL_MULTI_DRAW_ELEMENTS_BASE_VERTEX                     62
#define OGL_BLITFRAMEBUFFER                                                     63
#define OGL_PROGRAM_PARAMETERI                          64
#define OGL_TEXIMAGE3D                                          65
#define OGL_FRAMEBUFFER_TEXTURE                         66
#define OGL_GET_UNIFORM_INDICES                         67
#define OGL_GET_ACTIVE_UNIFORMS_IV                      68
#define OGL_GET_ACTIVE_UNIFORM_NAME                     69
#define OGL_GET_UNIFORM_BLOCK_INDEX                     70
#define OGL_GET_ACTIVE_UNIFORM_BLOCK_IV         71
#define OGL_GET_ACTIVE_UNIFORM_BLOCK_NAME       72
#define OGL_UNIFORM_BLOCK_BINDING                       73
#define OGL_BEGIN_TRANSFORM_FEEDBACK            74
#define OGL_END_TRANSFORM_FEEDBACK                      75
#define OGL_BIND_BUFFER_RANGE                           76
#define OGL_BIND_BUFFER_OFFSET                          77
#define OGL_BIND_BUFFER_BASE                            78
#define OGL_TRANSFORM_FEEDBACK_VARYINGS         79
#define OGL_GET_TRANSFORM_FEEDBACK_VARYING      80
#define OGL_ARB_DRAW_ARRAYS_INSTANCED           81
#define OGL_ARB_DRAW_ELEMENTS_INSTANCED         82
#define OGL_ARB_TEX_BUFFER                                      83

#define NUM_OGL_FUNCTIONS                                       84

// special extensions/functions (OS specific, non-GL stuff)
#define OGL_SPC_WGL_SWAP_INTERVAL               0
#define OGL_SPC_GLX_SWAP_INTERVAL               1

#define NUM_OGL_EXT_SPECIAL                             2


#define Is_Extension_Enabled(x)         GL_Extensions[x].enabled

void opengl_extensions_init();


#define GLEXT_CALL(i, x) if (GL_Functions[i].function_ptr) \
                                                        ((x)GL_Functions[i].function_ptr)

// the same as GLEXT_CALL() except that it can be used with a cast or in an if statement
// this doesn't do NULL ptr checking so you have to be careful with it!
#define GLEXT_CALL2(i, x) ((x)GL_Functions[i].function_ptr)

#define GLEXT_SPC_CALL(i, x) if (GL_EXT_Special[i].function_ptr) \
                                                        ((x)GL_EXT_Special[i].function_ptr)


#ifdef __APPLE__
// !-----REMOVE WHEN WE MIGRATE TO THE OPENGL CORE PROFILE-----!
typedef void (* glDrawRangeElementsProcPtr) (GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const GLvoid *indices);
typedef void (* glTexBufferARBProcPtr) (GLenum target, GLenum internalformat, GLuint buffer);
typedef GLuint (* glGetUniformBlockIndexARBProcPtr) (GLuint program, const GLchar *uniformBlockName);

#define GL_TEXTURE_BUFFER_ARB               0x8C2A
#define GL_UNIFORM_BUFFER                   0x8A11
// !-----REMOVE WHEN WE MIGRATE TO THE OPENGL CORE PROFILE-----!

// OS X doesn't have the PFN* names so we have to use the real OSX function ptrs
#define PFNGLFOGCOORDFEXTPROC                                   glFogCoordfEXTProcPtr
#define PFNGLFOGCOORDPOINTEREXTPROC                             glFogCoordPointerEXTProcPtr
#define PFNGLMULTITEXCOORD2FARBPROC                             glMultiTexCoord2fARBProcPtr
#define PFNGLACTIVETEXTUREARBPROC                               glActiveTextureARBProcPtr
#define PFNGLCLIENTACTIVETEXTUREARBPROC                 glClientActiveTextureARBProcPtr
#define PFNGLCOMPRESSEDTEXIMAGE2DPROC                   glCompressedTexImage2DARBProcPtr
#define PFNGLCOMPRESSEDTEXSUBIMAGE2DPROC                glCompressedTexSubImage2DARBProcPtr
#define PFNGLGETCOMPRESSEDTEXIMAGEARBPROC               glGetCompressedTexImageARBProcPtr
//#define PFNGLSECONDARYCOLOR3FVEXTPROC                 glSecondaryColor3fvEXTProcPtr
//#define PFNGLSECONDARYCOLOR3UBVEXTPROC                glSecondaryColor3ubvEXTProcPtr
#define PFNGLLOCKARRAYSEXTPROC                                  glLockArraysEXTProcPtr
#define PFNGLUNLOCKARRAYSEXTPROC                                glUnlockArraysEXTProcPtr
//#define PFNGLLOADTRANSPOSEMATRIXFARBPROC              glLoadTransposeMatrixfARBProcPtr
//#define PFNGLMULTTRANSPOSEMATRIXFARBPROC              glMultTransposeMatrixfARBProcPtr
#define PFNGLDRAWRANGEELEMENTSPROC                              glDrawRangeElementsProcPtr
#define PFNGLBINDBUFFERARBPROC                                  glBindBufferARBProcPtr
#define PFNGLDELETEBUFFERSARBPROC                               glDeleteBuffersARBProcPtr
#define PFNGLGENBUFFERSARBPROC                                  glGenBuffersARBProcPtr
#define PFNGLBUFFERDATAARBPROC                                  glBufferDataARBProcPtr
#define PFNGLBUFFERSUBDATAARBPROC                               glBufferSubDataARBProcPtr
#define PFNGLMAPBUFFERARBPROC                                   glMapBufferARBProcPtr
#define PFNGLUNMAPBUFFERARBPROC                                 glUnmapBufferARBProcPtr
#define PFNGLISRENDERBUFFEREXTPROC                              glIsRenderbufferEXTProcPtr
#define PFNGLBINDRENDERBUFFEREXTPROC                    glBindRenderbufferEXTProcPtr
#define PFNGLDELETERENDERBUFFERSEXTPROC                 glDeleteRenderbuffersEXTProcPtr
#define PFNGLGENRENDERBUFFERSEXTPROC                    glGenRenderbuffersEXTProcPtr
#define PFNGLRENDERBUFFERSTORAGEEXTPROC                 glRenderbufferStorageEXTProcPtr
#define PFNGLGETRENDERBUFFERPARAMETERIVEXTPROC  glGetRenderbufferParameterivEXTProcPtr
#define PFNGLISFRAMEBUFFEREXTPROC                               glIsFramebufferEXTProcPtr
#define PFNGLBINDFRAMEBUFFEREXTPROC                             glBindFramebufferEXTProcPtr
#define PFNGLDELETEFRAMEBUFFERSEXTPROC                  glDeleteFramebuffersEXTProcPtr
#define PFNGLGENFRAMEBUFFERSEXTPROC                             glGenFramebuffersEXTProcPtr
#define PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC              glCheckFramebufferStatusEXTProcPtr
#define PFNGLFRAMEBUFFERTEXTURE2DEXTPROC                glFramebufferTexture2DEXTProcPtr
#define PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC             glFramebufferRenderbufferEXTProcPtr
#define PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVEXTPROC glGetFramebufferAttachmentParameterivEXTProcPtr
#define PFNGLGENERATEMIPMAPEXTPROC                              glGenerateMipmapEXTProcPtr
#define PFNGLDELETEOBJECTARBPROC                                glDeleteObjectARBProcPtr
#define PFNGLCREATESHADEROBJECTARBPROC                  glCreateShaderObjectARBProcPtr
#define PFNGLSHADERSOURCEARBPROC                                glShaderSourceARBProcPtr
#define PFNGLCOMPILESHADERARBPROC                               glCompileShaderARBProcPtr
#define PFNGLGETOBJECTPARAMETERIVARBPROC                glGetObjectParameterivARBProcPtr
#define PFNGLGETINFOLOGARBPROC                                  glGetInfoLogARBProcPtr
#define PFNGLCREATEPROGRAMOBJECTARBPROC                 glCreateProgramObjectARBProcPtr
#define PFNGLATTACHOBJECTARBPROC                                glAttachObjectARBProcPtr
#define PFNGLLINKPROGRAMARBPROC                                 glLinkProgramARBProcPtr
#define PFNGLUSEPROGRAMOBJECTARBPROC                    glUseProgramObjectARBProcPtr
#define PFNGLVALIDATEPROGRAMARBPROC                             glValidateProgramARBProcPtr
#define PFNGLENABLEVERTEXATTRIBARRAYARBPROC             glEnableVertexAttribArrayARBProcPtr
#define PFNGLDISABLEVERTEXATTRIBARRAYARBPROC    glDisableVertexAttribArrayARBProcPtr
#define PFNGLGETATTRIBLOCATIONARBPROC                   glGetAttribLocationARBProcPtr
#define PFNGLVERTEXATTRIBPOINTERARBPROC                 glVertexAttribPointerARBProcPtr
#define PFNGLGETUNIFORMLOCATIONARBPROC                  glGetUniformLocationARBProcPtr
#define PFNGLGETUNIFORMIVARBPROC                                glGetUniformivARBProcPtr
#define PFNGLUNIFORM1FARBPROC                                   glUniform1fARBProcPtr
#define PFNGLUNIFORM2FARBPROC                                   glUniform2fARBProcPtr
#define PFNGLUNIFORM3FARBPROC                                   glUniform3fARBProcPtr
#define PFNGLUNIFORM4FARBPROC                                   glUniform4fARBProcPtr
#define PFNGLUNIFORM3FVARBPROC                                  glUniform3fvARBProcPtr
#define PFNGLUNIFORM4FVARBPROC                                  glUniform4fvARBProcPtr
#define PFNGLUNIFORM1IARBPROC                                   glUniform1iARBProcPtr
#define PFNGLUNIFORMMATRIX4FVARBPROC                    glUniformMatrix4fvARBProcPtr
#define PFNGLDRAWBUFFERSPROC                                    glDrawBuffersARBProcPtr
#define PFNGLDRAWELEMENTSBASEVERTEXPROC         glDrawElementsBaseVertexProcPtr
#define PFNGLDRAWRANGEELEMENTSBASEVERTEXPROC    glDrawRangeElementsBaseVertexProcPtr
#define PFNGLDRAWELEMENTSINSTANCEDBASEVERTEXPROC glDrawElementsInstancedBaseVertexProcPtr
#define PFNGLMULTIDRAWELEMENTSBASEVERTEXPROC    glMultiDrawElementsBaseVertexProcPtr
#define PFNGLBLITFRAMEBUFFEREXTPROC                             glBlitFramebufferEXTProcPtr
#define PFNGLPROGRAMPARAMETERIEXTPROC                   glProgramParameteriEXTProcPtr
#define PFNGLFRAMEBUFFERTEXTUREEXTPROC                  glFramebufferTextureEXTProcPtr
#define PFNGLGETUNIFORMINDICESPROC                              glGetUniformIndicesARBProcPtr
#define PFNGLGETACTIVEUNIFORMSIVPROC                    glGetActiveUniformsivARBProcPtr
#define PFNGLGETACTIVEUNIFORMNAMEPROC                   glGetActiveUniformNameARBProcPtr
#define PFNGLGETUNIFORMBLOCKINDEXPROC                   glGetUniformBlockIndexARBProcPtr
#define PFNGLGETACTIVEUNIFORMBLOCKIVPROC                glGetActiveUniformBlockivARBProcPtr
#define PFNGLGETACTIVEUNIFORMBLOCKNAMEPROC              glGetActiveUniformBlockNameARBProcPtr
#define PFNGLUNIFORMBLOCKBINDINGPROC                    glUniformBlockBindingARBProcPtr
#define PFNGLBEGINTRANSFORMFEEDBACKEXTPROC              glBeginTransformFeedbackEXTProcPtr
#define PFNGLENDTRANSFORMFEEDBACKEXTPROC                glEndTransformFeedbackEXTProcPtr
#define PFNGLBINDBUFFERRANGEEXTPROC                             glBindBufferRangeEXTProcPtr
#define PFNGLBINDBUFFEROFFSETEXTPROC                    glBindBufferOffsetEXTProcPtr
#define PFNGLBINDBUFFERBASEEXTPROC                              glBindBufferBaseEXTProcPtr
#define PFNGLTRANSFORMFEEDBACKVARYINGSEXTPROC   glTransformFeedbackVaryingsEXTProcPtr
#define PFNGLGETTRANSFORMFEEDBACKVARYINGEXTPROC glGetTransformFeedbackVaryingEXTProcPtr
#define PFNGLDRAWARRAYSINSTANCEDARBPROC                 glDrawArraysInstancedARBProcPtr
#define PFNGLDRAWELEMENTSINSTANCEDARBPROC               glDrawElementsInstancedARBProcPtr
#define PFNGLTEXBUFFERARBPROC                                   glTexBufferARBProcPtr
#endif  // __APPLE__

#define vglFogCoordfEXT                                 GLEXT_CALL( OGL_FOG_COORDF, PFNGLFOGCOORDFEXTPROC )
#define vglFogCoordPointerEXT                   GLEXT_CALL( OGL_FOG_COORD_POINTER, PFNGLFOGCOORDPOINTEREXTPROC )
#define vglMultiTexCoord2fARB                   GLEXT_CALL( OGL_MULTI_TEX_COORD_2F, PFNGLMULTITEXCOORD2FARBPROC )
#define vglActiveTextureARB                             GLEXT_CALL( OGL_ACTIVE_TEXTURE, PFNGLACTIVETEXTUREARBPROC )
#define vglClientActiveTextureARB               GLEXT_CALL( OGL_CLIENT_ACTIVE_TEXTURE, PFNGLCLIENTACTIVETEXTUREARBPROC )
#define vglCompressedTexImage2D                 GLEXT_CALL( OGL_COMPRESSED_TEX_IMAGE_2D, PFNGLCOMPRESSEDTEXIMAGE2DPROC )
#define vglCompressedTexSubImage2D              GLEXT_CALL( OGL_COMPRESSED_TEX_SUB_IMAGE_2D, PFNGLCOMPRESSEDTEXSUBIMAGE2DPROC )
#define vglGetCompressedTexImageARB             GLEXT_CALL( OGL_GET_COMPRESSED_TEX_IMAGE, PFNGLGETCOMPRESSEDTEXIMAGEARBPROC )
//#define vglSecondaryColor3fvEXT               GLEXT_CALL( OGL_SECONDARY_COLOR_3FV, PFNGLSECONDARYCOLOR3FVEXTPROC )
//#define vglSecondaryColor3ubvEXT              GLEXT_CALL( OGL_SECONDARY_COLOR_3UBV, PFNGLSECONDARYCOLOR3UBVEXTPROC )
#define vglLockArraysEXT                                GLEXT_CALL( OGL_LOCK_ARRAYS, PFNGLLOCKARRAYSEXTPROC )
#define vglUnlockArraysEXT                              GLEXT_CALL( OGL_UNLOCK_ARRAYS, PFNGLUNLOCKARRAYSEXTPROC )
//#define vglLoadTransposeMatrixfARB    GLEXT_CALL( OGL_LOAD_TRANSPOSE_MATRIX_F, PFNGLLOADTRANSPOSEMATRIXFARBPROC )
//#define vglMultTransposeMatrixfARB    GLEXT_CALL( OGL_MULT_TRANSPOSE_MATRIX_F, PFNGLMULTTRANSPOSEMATRIXFARBPROC )
#define vglDrawRangeElements                    GLEXT_CALL( OGL_DRAW_RANGE_ELEMENTS, PFNGLDRAWRANGEELEMENTSPROC )
#define vglBindBufferARB                                GLEXT_CALL( OGL_BIND_BUFFER, PFNGLBINDBUFFERARBPROC )
#define vglDeleteBuffersARB                             GLEXT_CALL( OGL_DELETE_BUFFERS, PFNGLDELETEBUFFERSARBPROC )
#define vglGenBuffersARB                                GLEXT_CALL( OGL_GEN_BUFFERS, PFNGLGENBUFFERSARBPROC )
#define vglBufferDataARB                                GLEXT_CALL( OGL_BUFFER_DATA, PFNGLBUFFERDATAARBPROC )
#define vglBufferSubDataARB                             GLEXT_CALL( OGL_BUFFER_SUB_DATA, PFNGLBUFFERSUBDATAARBPROC )
#define vglMapBufferARB                                 GLEXT_CALL2( OGL_MAP_BUFFER, PFNGLMAPBUFFERARBPROC )
#define vglUnmapBufferARB                               GLEXT_CALL( OGL_UNMAP_BUFFER, PFNGLUNMAPBUFFERARBPROC )
#define vglIsRenderbufferEXT                    GLEXT_CALL2( OGL_IS_RENDERBUFFER, PFNGLISRENDERBUFFEREXTPROC )
#define vglBindRenderbufferEXT                  GLEXT_CALL( OGL_BIND_RENDERBUFFER, PFNGLBINDRENDERBUFFEREXTPROC )
#define vglDeleteRenderbuffersEXT               GLEXT_CALL( OGL_DELETE_RENDERBUFFERS, PFNGLDELETERENDERBUFFERSEXTPROC )
#define vglGenRenderbuffersEXT                  GLEXT_CALL( OGL_GEN_RENDERBUFFERS, PFNGLGENRENDERBUFFERSEXTPROC )
#define vglRenderbufferStorageEXT               GLEXT_CALL( OGL_RENDERBUFFER_STORAGE, PFNGLRENDERBUFFERSTORAGEEXTPROC )
#define vglGetRenderbufferParameterivEXT        GLEXT_CALL( OGL_GET_RENDERBUFFER_PARAMETER_IV, PFNGLGETRENDERBUFFERPARAMETERIVEXTPROC )
#define vglIsFramebufferEXT                             GLEXT_CALL2( OGL_IS_FRAMEBUFFER, PFNGLISFRAMEBUFFEREXTPROC )
#define vglBindFramebufferEXT                   GLEXT_CALL( OGL_BIND_FRAMEBUFFER, PFNGLBINDFRAMEBUFFEREXTPROC )
#define vglDeleteFramebuffersEXT                GLEXT_CALL( OGL_DELETE_FRAMEBUFFERS, PFNGLDELETEFRAMEBUFFERSEXTPROC )
#define vglGenFramebuffersEXT                   GLEXT_CALL( OGL_GEN_FRAMEBUFFERS, PFNGLGENFRAMEBUFFERSEXTPROC )
#define vglCheckFramebufferStatusEXT    GLEXT_CALL2( OGL_CHECK_FRAMEBUFFER_STATUS, PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC )
#define vglFramebufferTexture2DEXT              GLEXT_CALL( OGL_FRAMEBUFFER_TEXTURE_2D, PFNGLFRAMEBUFFERTEXTURE2DEXTPROC )
#define vglFramebufferRenderbufferEXT   GLEXT_CALL( OGL_FRAMEBUFFER_RENDERBUFFER, PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC )
#define vglGetFramebufferAttachmentParameterivEXT       GLEXT_CALL( OGL_GET_FRAMEBUFFER_ATTACHMENT_PARAMETER_IV, PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVEXTPROC )
#define vglGenerateMipmapEXT                    GLEXT_CALL( OGL_GENERATE_MIPMAP, PFNGLGENERATEMIPMAPEXTPROC )
#define vglDeleteObjectARB                              GLEXT_CALL( OGL_DELETE_OBJECT, PFNGLDELETEOBJECTARBPROC )
#define vglCreateShaderObjectARB                GLEXT_CALL2( OGL_CREATE_SHADER_OBJECT, PFNGLCREATESHADEROBJECTARBPROC )
#define vglShaderSourceARB                              GLEXT_CALL( OGL_SHADER_SOURCE, PFNGLSHADERSOURCEARBPROC )
#define vglCompileShaderARB                             GLEXT_CALL( OGL_COMPILE_SHADER, PFNGLCOMPILESHADERARBPROC )
#define vglGetObjectParameterivARB              GLEXT_CALL( OGL_GET_OBJECT_PARAMETERIV, PFNGLGETOBJECTPARAMETERIVARBPROC )
#define vglGetInfoLogARB                                GLEXT_CALL( OGL_GET_INFO_LOG, PFNGLGETINFOLOGARBPROC )
#define vglCreateProgramObjectARB               GLEXT_CALL2( OGL_CREATE_PROGRAM_OBJECT, PFNGLCREATEPROGRAMOBJECTARBPROC )
#define vglAttachObjectARB                              GLEXT_CALL( OGL_ATTACH_OBJECT, PFNGLATTACHOBJECTARBPROC )
#define vglLinkProgramARB                               GLEXT_CALL( OGL_LINK_PROGRAM, PFNGLLINKPROGRAMARBPROC )
#define vglUseProgramObjectARB                  GLEXT_CALL( OGL_USE_PROGRAM_OBJECT, PFNGLUSEPROGRAMOBJECTARBPROC )
#define vglValidateProgramARB                   GLEXT_CALL( OGL_VALIDATE_PROGRAM, PFNGLVALIDATEPROGRAMARBPROC )
#define vglEnableVertexAttribArrayARB   GLEXT_CALL( OGL_ENABLE_VERTEX_ATTRIB_ARRAY, PFNGLENABLEVERTEXATTRIBARRAYARBPROC )
#define vglDisableVertexAttribArrayARB  GLEXT_CALL( OGL_DISABLE_VERTEX_ATTRIB_ARRAY, PFNGLDISABLEVERTEXATTRIBARRAYARBPROC )
#define vglGetAttribLocationARB                 GLEXT_CALL2( OGL_GET_ATTRIB_LOCATION, PFNGLGETATTRIBLOCATIONARBPROC )
#define vglVertexAttribPointerARB               GLEXT_CALL( OGL_VERTEX_ATTRIB_POINTER, PFNGLVERTEXATTRIBPOINTERARBPROC )
#define vglGetUniformLocationARB                GLEXT_CALL2( OGL_GET_UNIFORM_LOCATION, PFNGLGETUNIFORMLOCATIONARBPROC )
#define vglGetUniformivARB                              GLEXT_CALL( OGL_GET_UNIFORMIV, PFNGLGETUNIFORMIVARBPROC )
#define vglUniform1fARB                                 GLEXT_CALL( OGL_UNIFORM1F, PFNGLUNIFORM1FARBPROC )
#define vglUniform2fARB                                 GLEXT_CALL( OGL_UNIFORM2F, PFNGLUNIFORM2FARBPROC )
#define vglUniform3fARB                                 GLEXT_CALL( OGL_UNIFORM3F, PFNGLUNIFORM3FARBPROC )
#define vglUniform4fARB                                 GLEXT_CALL( OGL_UNIFORM4F, PFNGLUNIFORM4FARBPROC )
#define vglUniform3fvARB                                GLEXT_CALL( OGL_UNIFORM3FV, PFNGLUNIFORM3FVARBPROC )
#define vglUniform4fvARB                                GLEXT_CALL( OGL_UNIFORM4FV, PFNGLUNIFORM4FVARBPROC )
#define vglUniform1iARB                                 GLEXT_CALL( OGL_UNIFORM1I, PFNGLUNIFORM1IARBPROC )
#define vglUniformMatrix4fvARB                  GLEXT_CALL( OGL_UNIFORM_MATRIX4FV, PFNGLUNIFORMMATRIX4FVARBPROC )
#define vglDrawBuffers                                  GLEXT_CALL( OGL_DRAWBUFFERS, PFNGLDRAWBUFFERSPROC )
#define vglDrawElementsBaseVertex               GLEXT_CALL( OGL_DRAW_ELEMENTS_BASE_VERTEX, PFNGLDRAWELEMENTSBASEVERTEXPROC )
#define vglDrawRangeElementsBaseVertex  GLEXT_CALL( OGL_DRAW_RANGE_ELEMENTS_BASE_VERTEX, PFNGLDRAWRANGEELEMENTSBASEVERTEXPROC )
#define vglDrawElementsInstancedBaseVertex              GLEXT_CALL( OGL_DRAW_ELEMENTS_INSTANCED_BASE_VERTEX, PFNGLDRAWELEMENTSINSTANCEDBASEVERTEXPROC )
#define vglMultiDrawElementsBaseVertex  GLEXT_CALL( OGL_MULTI_DRAW_ELEMENTS_BASE_VERTEX, PFNGLMULTIDRAWELEMENTSBASEVERTEXPROC )
#define vglBlitFramebufferEXT                   GLEXT_CALL( OGL_BLITFRAMEBUFFER, PFNGLBLITFRAMEBUFFEREXTPROC )
#define vglProgramParameteriEXT                 GLEXT_CALL( OGL_PROGRAM_PARAMETERI, PFNGLPROGRAMPARAMETERIEXTPROC )
#define vglGetUniformIndicesARB                 GLEXT_CALL( OGL_GET_UNIFORM_INDICES, PFNGLGETUNIFORMINDICESPROC )
#define vglGetActiveUniformsivARB               GLEXT_CALL( OGL_GET_ACTIVE_UNIFORMS_IV, PFNGLGETACTIVEUNIFORMSIVPROC )
#define vglGetActiveUniformNameARB              GLEXT_CALL( OGL_GET_ACTIVE_UNIFORM_NAME, PFNGLGETACTIVEUNIFORMNAMEPROC )
#define vglGetUniformBlockIndexARB              GLEXT_CALL2( OGL_GET_UNIFORM_BLOCK_INDEX, PFNGLGETUNIFORMBLOCKINDEXPROC )
#define vglGetActiveUniformBlockivARB   GLEXT_CALL( OGL_GET_ACTIVE_UNIFORM_BLOCK_IV, PFNGLGETACTIVEUNIFORMBLOCKIVPROC )
#define vglGetActiveUniformBlockNameARB GLEXT_CALL( OGL_GET_ACTIVE_UNIFORM_BLOCK_NAME, PFNGLGETACTIVEUNIFORMBLOCKNAMEPROC )
#define vglUniformBlockBindingARB               GLEXT_CALL( OGL_UNIFORM_BLOCK_BINDING, PFNGLUNIFORMBLOCKBINDINGPROC )
#define vglBeginTransformFeedbackEXT    GLEXT_CALL( OGL_BEGIN_TRANSFORM_FEEDBACK, PFNGLBEGINTRANSFORMFEEDBACKEXTPROC )
#define vglEndTransformFeedbackEXT              GLEXT_CALL( OGL_END_TRANSFORM_FEEDBACK, PFNGLENDTRANSFORMFEEDBACKEXTPROC ) 
#define vglBindBufferRangeEXT                   GLEXT_CALL( OGL_BIND_BUFFER_RANGE, PFNGLBINDBUFFERRANGEEXTPROC )
#define vglBindBufferOffsetEXT                  GLEXT_CALL( OGL_BIND_BUFFER_OFFSET, PFNGLBINDBUFFEROFFSETEXTPROC )
#define vglBindBufferBaseEXT                    GLEXT_CALL( OGL_BIND_BUFFER_BASE, PFNGLBINDBUFFERBASEEXTPROC ) 
#define vglTransformFeedbackVaryingsEXT GLEXT_CALL( OGL_TRANSFORM_FEEDBACK_VARYINGS, PFNGLTRANSFORMFEEDBACKVARYINGSEXTPROC )
#define vglGetTransformFeedbackVaryingEXT       GLEXT_CALL( OGL_GET_TRANSFORM_FEEDBACK_VARYING, PFNGLGETTRANSFORMFEEDBACKVARYINGEXTPROC )
#define vglDrawArraysInstancedARB               GLEXT_CALL( OGL_ARB_DRAW_ARRAYS_INSTANCED, PFNGLDRAWARRAYSINSTANCEDARBPROC )
#define vglDrawElementsInstancedARB             GLEXT_CALL( OGL_ARB_DRAW_ELEMENTS_INSTANCED, PFNGLDRAWELEMENTSINSTANCEDARBPROC )
#define vglTexBufferARB                                 GLEXT_CALL( OGL_ARB_TEX_BUFFER, PFNGLTEXBUFFERARBPROC )
#ifndef __APPLE__
#define vglTexImage3D                                   GLEXT_CALL( OGL_TEXIMAGE3D, PFNGLTEXIMAGE3DPROC )
#else
#define vglTexImage3D                   glTexImage3D
#endif
#define vglFramebufferTextureEXT                GLEXT_CALL( OGL_FRAMEBUFFER_TEXTURE, PFNGLFRAMEBUFFERTEXTUREEXTPROC )

// special extensions
#define vwglSwapIntervalEXT                     GLEXT_SPC_CALL( OGL_SPC_WGL_SWAP_INTERVAL, PFNWGLSWAPINTERVALEXTPROC )
#define vglXSwapIntervalSGI                     GLEXT_SPC_CALL( OGL_SPC_GLX_SWAP_INTERVAL, PFNGLXSWAPINTERVALSGIPROC )

#endif // _GROPENGLEXT_H