// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
// Copyright (C) 2010  Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.


#include "stdopengl.h"

#include "nel/misc/common.h"

#include "driver_opengl.h"
#include "driver_opengl_extension.h"
#include "nel/3d/material.h"

using namespace std;
using namespace NLMISC;

// ***************************************************************************
#ifdef NL_OS_WINDOWS
#define	nglGetProcAddress wglGetProcAddress
#elif defined(NL_OS_MAC)
#include <mach-o/dyld.h>
// glXGetProcAddressARB doesn't work correctly on MAC
void *nglGetProcAddress(const char *name)
{
	NSSymbol symbol;
    char *symbolName;
    symbolName = (char*)malloc (strlen (name) + 2);
    strcpy(symbolName + 1, name);
    symbolName[0] = '_';
    symbol = NULL;
    if (NSIsSymbolNameDefined (symbolName)) symbol = NSLookupAndBindSymbol (symbolName);
    free (symbolName);
    return symbol ? NSAddressOfSymbol (symbol) : NULL;
}
#else	// NL_OS_WINDOWS
void (*nglGetProcAddress(const char *procName))()
{
	return glXGetProcAddressARB((const GLubyte *)procName);
}
#endif	// NL_OS_WINDOWS


// ***************************************************************************
// The exported function names

// ARB_multitexture
NEL_PFNGLACTIVETEXTUREARBPROC					nglActiveTextureARB;
NEL_PFNGLCLIENTACTIVETEXTUREARBPROC				nglClientActiveTextureARB;

NEL_PFNGLMULTITEXCOORD1SARBPROC					nglMultiTexCoord1sARB;
NEL_PFNGLMULTITEXCOORD1IARBPROC					nglMultiTexCoord1iARB;
NEL_PFNGLMULTITEXCOORD1FARBPROC					nglMultiTexCoord1fARB;
NEL_PFNGLMULTITEXCOORD1DARBPROC					nglMultiTexCoord1dARB;
NEL_PFNGLMULTITEXCOORD2SARBPROC					nglMultiTexCoord2sARB;
NEL_PFNGLMULTITEXCOORD2IARBPROC					nglMultiTexCoord2iARB;
NEL_PFNGLMULTITEXCOORD2FARBPROC					nglMultiTexCoord2fARB;
NEL_PFNGLMULTITEXCOORD2DARBPROC					nglMultiTexCoord2dARB;
NEL_PFNGLMULTITEXCOORD3SARBPROC					nglMultiTexCoord3sARB;
NEL_PFNGLMULTITEXCOORD3IARBPROC					nglMultiTexCoord3iARB;
NEL_PFNGLMULTITEXCOORD3FARBPROC					nglMultiTexCoord3fARB;
NEL_PFNGLMULTITEXCOORD3DARBPROC					nglMultiTexCoord3dARB;
NEL_PFNGLMULTITEXCOORD4SARBPROC					nglMultiTexCoord4sARB;
NEL_PFNGLMULTITEXCOORD4IARBPROC					nglMultiTexCoord4iARB;
NEL_PFNGLMULTITEXCOORD4FARBPROC					nglMultiTexCoord4fARB;
NEL_PFNGLMULTITEXCOORD4DARBPROC					nglMultiTexCoord4dARB;

NEL_PFNGLMULTITEXCOORD1SVARBPROC				nglMultiTexCoord1svARB;
NEL_PFNGLMULTITEXCOORD1IVARBPROC				nglMultiTexCoord1ivARB;
NEL_PFNGLMULTITEXCOORD1FVARBPROC				nglMultiTexCoord1fvARB;
NEL_PFNGLMULTITEXCOORD1DVARBPROC				nglMultiTexCoord1dvARB;
NEL_PFNGLMULTITEXCOORD2SVARBPROC				nglMultiTexCoord2svARB;
NEL_PFNGLMULTITEXCOORD2IVARBPROC				nglMultiTexCoord2ivARB;
NEL_PFNGLMULTITEXCOORD2FVARBPROC				nglMultiTexCoord2fvARB;
NEL_PFNGLMULTITEXCOORD2DVARBPROC				nglMultiTexCoord2dvARB;
NEL_PFNGLMULTITEXCOORD3SVARBPROC				nglMultiTexCoord3svARB;
NEL_PFNGLMULTITEXCOORD3IVARBPROC				nglMultiTexCoord3ivARB;
NEL_PFNGLMULTITEXCOORD3FVARBPROC				nglMultiTexCoord3fvARB;
NEL_PFNGLMULTITEXCOORD3DVARBPROC				nglMultiTexCoord3dvARB;
NEL_PFNGLMULTITEXCOORD4SVARBPROC				nglMultiTexCoord4svARB;
NEL_PFNGLMULTITEXCOORD4IVARBPROC				nglMultiTexCoord4ivARB;
NEL_PFNGLMULTITEXCOORD4FVARBPROC				nglMultiTexCoord4fvARB;
NEL_PFNGLMULTITEXCOORD4DVARBPROC				nglMultiTexCoord4dvARB;

// ARB_TextureCompression.
NEL_PFNGLCOMPRESSEDTEXIMAGE3DARBPROC			nglCompressedTexImage3DARB;
NEL_PFNGLCOMPRESSEDTEXIMAGE2DARBPROC			nglCompressedTexImage2DARB;
NEL_PFNGLCOMPRESSEDTEXIMAGE1DARBPROC			nglCompressedTexImage1DARB;
NEL_PFNGLCOMPRESSEDTEXSUBIMAGE3DARBPROC			nglCompressedTexSubImage3DARB;
NEL_PFNGLCOMPRESSEDTEXSUBIMAGE2DARBPROC			nglCompressedTexSubImage2DARB;
NEL_PFNGLCOMPRESSEDTEXSUBIMAGE1DARBPROC			nglCompressedTexSubImage1DARB;
NEL_PFNGLGETCOMPRESSEDTEXIMAGEARBPROC			nglGetCompressedTexImageARB;

// VertexArrayRangeNV.
NEL_PFNGLFLUSHVERTEXARRAYRANGENVPROC			nglFlushVertexArrayRangeNV;
NEL_PFNGLVERTEXARRAYRANGENVPROC					nglVertexArrayRangeNV;

// FenceNV.
NEL_PFNGLDELETEFENCESNVPROC						nglDeleteFencesNV;
NEL_PFNGLGENFENCESNVPROC						nglGenFencesNV;
NEL_PFNGLISFENCENVPROC							nglIsFenceNV;
NEL_PFNGLTESTFENCENVPROC						nglTestFenceNV;
NEL_PFNGLGETFENCEIVNVPROC						nglGetFenceivNV;
NEL_PFNGLFINISHFENCENVPROC						nglFinishFenceNV;
NEL_PFNGLSETFENCENVPROC							nglSetFenceNV;

// VertexWeighting.
NEL_PFNGLVERTEXWEIGHTFEXTPROC					nglVertexWeightfEXT;
NEL_PFNGLVERTEXWEIGHTFVEXTPROC					nglVertexWeightfvEXT;
NEL_PFNGLVERTEXWEIGHTPOINTEREXTPROC				nglVertexWeightPointerEXT;

// VertexProgramExtension.
NEL_PFNGLAREPROGRAMSRESIDENTNVPROC				nglAreProgramsResidentNV;
NEL_PFNGLBINDPROGRAMNVPROC						nglBindProgramNV;
NEL_PFNGLDELETEPROGRAMSNVPROC					nglDeleteProgramsNV;
NEL_PFNGLEXECUTEPROGRAMNVPROC					nglExecuteProgramNV;
NEL_PFNGLGENPROGRAMSNVPROC						nglGenProgramsNV;
NEL_PFNGLGETPROGRAMPARAMETERDVNVPROC			nglGetProgramParameterdvNV;
NEL_PFNGLGETPROGRAMPARAMETERFVNVPROC			nglGetProgramParameterfvNV;
NEL_PFNGLGETPROGRAMIVNVPROC						nglGetProgramivNV;
NEL_PFNGLGETPROGRAMSTRINGNVPROC					nglGetProgramStringNV;
NEL_PFNGLGETTRACKMATRIXIVNVPROC					nglGetTrackMatrixivNV;
NEL_PFNGLGETVERTEXATTRIBDVNVPROC				nglGetVertexAttribdvNV;
NEL_PFNGLGETVERTEXATTRIBFVNVPROC				nglGetVertexAttribfvNV;
NEL_PFNGLGETVERTEXATTRIBIVNVPROC				nglGetVertexAttribivNV;
NEL_PFNGLGETVERTEXATTRIBPOINTERVNVPROC			nglGetVertexAttribPointervNV;
NEL_PFNGLISPROGRAMNVPROC						nglIsProgramNV;
NEL_PFNGLLOADPROGRAMNVPROC						nglLoadProgramNV;
NEL_PFNGLPROGRAMPARAMETER4DNVPROC				nglProgramParameter4dNV;
NEL_PFNGLPROGRAMPARAMETER4DVNVPROC				nglProgramParameter4dvNV;
NEL_PFNGLPROGRAMPARAMETER4FNVPROC				nglProgramParameter4fNV;
NEL_PFNGLPROGRAMPARAMETER4FVNVPROC				nglProgramParameter4fvNV;
NEL_PFNGLPROGRAMPARAMETERS4DVNVPROC				nglProgramParameters4dvNV;
NEL_PFNGLPROGRAMPARAMETERS4FVNVPROC				nglProgramParameters4fvNV;
NEL_PFNGLREQUESTRESIDENTPROGRAMSNVPROC			nglRequestResidentProgramsNV;
NEL_PFNGLTRACKMATRIXNVPROC						nglTrackMatrixNV;
NEL_PFNGLVERTEXATTRIBPOINTERNVPROC				nglVertexAttribPointerNV;
NEL_PFNGLVERTEXATTRIB1DNVPROC					nglVertexAttrib1dNV;
NEL_PFNGLVERTEXATTRIB1DVNVPROC					nglVertexAttrib1dvNV;
NEL_PFNGLVERTEXATTRIB1FNVPROC					nglVertexAttrib1fNV;
NEL_PFNGLVERTEXATTRIB1FVNVPROC					nglVertexAttrib1fvNV;
NEL_PFNGLVERTEXATTRIB1SNVPROC					nglVertexAttrib1sNV;
NEL_PFNGLVERTEXATTRIB1SVNVPROC					nglVertexAttrib1svNV;
NEL_PFNGLVERTEXATTRIB2DNVPROC					nglVertexAttrib2dNV;
NEL_PFNGLVERTEXATTRIB2DVNVPROC					nglVertexAttrib2dvNV;
NEL_PFNGLVERTEXATTRIB2FNVPROC					nglVertexAttrib2fNV;
NEL_PFNGLVERTEXATTRIB2FVNVPROC					nglVertexAttrib2fvNV;
NEL_PFNGLVERTEXATTRIB2SNVPROC					nglVertexAttrib2sNV;
NEL_PFNGLVERTEXATTRIB2SVNVPROC					nglVertexAttrib2svNV;
NEL_PFNGLVERTEXATTRIB3DNVPROC					nglVertexAttrib3dNV;
NEL_PFNGLVERTEXATTRIB3DVNVPROC					nglVertexAttrib3dvNV;
NEL_PFNGLVERTEXATTRIB3FNVPROC					nglVertexAttrib3fNV;
NEL_PFNGLVERTEXATTRIB3FVNVPROC					nglVertexAttrib3fvNV;
NEL_PFNGLVERTEXATTRIB3SNVPROC					nglVertexAttrib3sNV;
NEL_PFNGLVERTEXATTRIB3SVNVPROC					nglVertexAttrib3svNV;
NEL_PFNGLVERTEXATTRIB4DNVPROC					nglVertexAttrib4dNV;
NEL_PFNGLVERTEXATTRIB4DVNVPROC					nglVertexAttrib4dvNV;
NEL_PFNGLVERTEXATTRIB4FNVPROC					nglVertexAttrib4fNV;
NEL_PFNGLVERTEXATTRIB4FVNVPROC					nglVertexAttrib4fvNV;
NEL_PFNGLVERTEXATTRIB4SNVPROC					nglVertexAttrib4sNV;
NEL_PFNGLVERTEXATTRIB4SVNVPROC					nglVertexAttrib4svNV;
NEL_PFNGLVERTEXATTRIB4UBVNVPROC					nglVertexAttrib4ubvNV;
NEL_PFNGLVERTEXATTRIBS1DVNVPROC					nglVertexAttribs1dvNV;
NEL_PFNGLVERTEXATTRIBS1FVNVPROC					nglVertexAttribs1fvNV;
NEL_PFNGLVERTEXATTRIBS1SVNVPROC					nglVertexAttribs1svNV;
NEL_PFNGLVERTEXATTRIBS2DVNVPROC					nglVertexAttribs2dvNV;
NEL_PFNGLVERTEXATTRIBS2FVNVPROC					nglVertexAttribs2fvNV;
NEL_PFNGLVERTEXATTRIBS2SVNVPROC					nglVertexAttribs2svNV;
NEL_PFNGLVERTEXATTRIBS3DVNVPROC					nglVertexAttribs3dvNV;
NEL_PFNGLVERTEXATTRIBS3FVNVPROC					nglVertexAttribs3fvNV;
NEL_PFNGLVERTEXATTRIBS3SVNVPROC					nglVertexAttribs3svNV;
NEL_PFNGLVERTEXATTRIBS4DVNVPROC					nglVertexAttribs4dvNV;
NEL_PFNGLVERTEXATTRIBS4FVNVPROC					nglVertexAttribs4fvNV;
NEL_PFNGLVERTEXATTRIBS4SVNVPROC					nglVertexAttribs4svNV;
NEL_PFNGLVERTEXATTRIBS4UBVNVPROC				nglVertexAttribs4ubvNV;

// VertexShaderExt extension
NEL_PFNGLBEGINVERTEXSHADEREXTPROC				nglBeginVertexShaderEXT;
NEL_PFNGLENDVERTEXSHADEREXTPROC					nglEndVertexShaderEXT;
NEL_PFNGLBINDVERTEXSHADEREXTPROC				nglBindVertexShaderEXT;
NEL_PFNGLGENVERTEXSHADERSEXTPROC				nglGenVertexShadersEXT;
NEL_PFNGLDELETEVERTEXSHADEREXTPROC				nglDeleteVertexShaderEXT;
NEL_PFNGLSHADEROP1EXTPROC						nglShaderOp1EXT;
NEL_PFNGLSHADEROP2EXTPROC						nglShaderOp2EXT;
NEL_PFNGLSHADEROP3EXTPROC						nglShaderOp3EXT;
NEL_PFNGLSWIZZLEEXTPROC							nglSwizzleEXT;
NEL_PFNGLWRITEMASKEXTPROC						nglWriteMaskEXT;
NEL_PFNGLINSERTCOMPONENTEXTPROC					nglInsertComponentEXT;
NEL_PFNGLEXTRACTCOMPONENTEXTPROC				nglExtractComponentEXT;
NEL_PFNGLGENSYMBOLSEXTPROC						nglGenSymbolsEXT;
NEL_PFNGLSETINVARIANTEXTPROC					nglSetInvariantEXT;
NEL_PFNGLSETLOCALCONSTANTEXTPROC				nglSetLocalConstantEXT;
NEL_PFNGLVARIANTPOINTEREXTPROC					nglVariantPointerEXT;
NEL_PFNGLENABLEVARIANTCLIENTSTATEEXTPROC		nglEnableVariantClientStateEXT;
NEL_PFNGLDISABLEVARIANTCLIENTSTATEEXTPROC		nglDisableVariantClientStateEXT;
NEL_PFNGLBINDLIGHTPARAMETEREXTPROC				nglBindLightParameterEXT;
NEL_PFNGLBINDMATERIALPARAMETEREXTPROC			nglBindMaterialParameterEXT;
NEL_PFNGLBINDTEXGENPARAMETEREXTPROC				nglBindTexGenParameterEXT;
NEL_PFNGLBINDTEXTUREUNITPARAMETEREXTPROC		nglBindTextureUnitParameterEXT;
NEL_PFNGLBINDPARAMETEREXTPROC					nglBindParameterEXT;
NEL_PFNGLISVARIANTENABLEDEXTPROC				nglIsVariantEnabledEXT;
NEL_PFNGLGETVARIANTBOOLEANVEXTPROC				nglGetVariantBooleanvEXT;
NEL_PFNGLGETVARIANTINTEGERVEXTPROC				nglGetVariantIntegervEXT;
NEL_PFNGLGETVARIANTFLOATVEXTPROC				nglGetVariantFloatvEXT;
NEL_PFNGLGETVARIANTPOINTERVEXTPROC				nglGetVariantPointervEXT;
NEL_PFNGLGETINVARIANTBOOLEANVEXTPROC			nglGetInvariantBooleanvEXT;
NEL_PFNGLGETINVARIANTINTEGERVEXTPROC			nglGetInvariantIntegervEXT;
NEL_PFNGLGETINVARIANTFLOATVEXTPROC				nglGetInvariantFloatvEXT;
NEL_PFNGLGETLOCALCONSTANTBOOLEANVEXTPROC		nglGetLocalConstantBooleanvEXT;
NEL_PFNGLGETLOCALCONSTANTINTEGERVEXTPROC		nglGetLocalConstantIntegervEXT;
NEL_PFNGLGETLOCALCONSTANTFLOATVEXTPROC			nglGetLocalConstantFloatvEXT;

// SecondaryColor extension
NEL_PFNGLSECONDARYCOLOR3BEXTPROC				nglSecondaryColor3bEXT;
NEL_PFNGLSECONDARYCOLOR3BVEXTPROC				nglSecondaryColor3bvEXT;
NEL_PFNGLSECONDARYCOLOR3DEXTPROC				nglSecondaryColor3dEXT;
NEL_PFNGLSECONDARYCOLOR3DVEXTPROC				nglSecondaryColor3dvEXT;
NEL_PFNGLSECONDARYCOLOR3FEXTPROC				nglSecondaryColor3fEXT;
NEL_PFNGLSECONDARYCOLOR3FVEXTPROC				nglSecondaryColor3fvEXT;
NEL_PFNGLSECONDARYCOLOR3IEXTPROC				nglSecondaryColor3iEXT;
NEL_PFNGLSECONDARYCOLOR3IVEXTPROC				nglSecondaryColor3ivEXT;
NEL_PFNGLSECONDARYCOLOR3SEXTPROC				nglSecondaryColor3sEXT;
NEL_PFNGLSECONDARYCOLOR3SVEXTPROC				nglSecondaryColor3svEXT;
NEL_PFNGLSECONDARYCOLOR3UBEXTPROC				nglSecondaryColor3ubEXT;
NEL_PFNGLSECONDARYCOLOR3UBVEXTPROC				nglSecondaryColor3ubvEXT;
NEL_PFNGLSECONDARYCOLOR3UIEXTPROC				nglSecondaryColor3uiEXT;
NEL_PFNGLSECONDARYCOLOR3UIVEXTPROC				nglSecondaryColor3uivEXT;
NEL_PFNGLSECONDARYCOLOR3USEXTPROC				nglSecondaryColor3usEXT;
NEL_PFNGLSECONDARYCOLOR3USVEXTPROC				nglSecondaryColor3usvEXT;
NEL_PFNGLSECONDARYCOLORPOINTEREXTPROC			nglSecondaryColorPointerEXT;

// BlendColor extension
NEL_PFNGLBLENDCOLOREXTPROC						nglBlendColorEXT;

//========================
NEL_PFNGLNEWOBJECTBUFFERATIPROC					nglNewObjectBufferATI;
NEL_PFNGLISOBJECTBUFFERATIPROC					nglIsObjectBufferATI;
NEL_PFNGLUPDATEOBJECTBUFFERATIPROC				nglUpdateObjectBufferATI;
NEL_PFNGLGETOBJECTBUFFERFVATIPROC				nglGetObjectBufferfvATI;
NEL_PFNGLGETOBJECTBUFFERIVATIPROC				nglGetObjectBufferivATI;
NEL_PFNGLDELETEOBJECTBUFFERATIPROC				nglDeleteObjectBufferATI;
NEL_PFNGLARRAYOBJECTATIPROC						nglArrayObjectATI;
NEL_PFNGLGETARRAYOBJECTFVATIPROC				nglGetArrayObjectfvATI;
NEL_PFNGLGETARRAYOBJECTIVATIPROC				nglGetArrayObjectivATI;
NEL_PFNGLVARIANTARRAYOBJECTATIPROC				nglVariantArrayObjectATI;
NEL_PFNGLGETVARIANTARRAYOBJECTFVATIPROC			nglGetVariantArrayObjectfvATI;
NEL_PFNGLGETVARIANTARRAYOBJECTIVATIPROC			nglGetVariantArrayObjectivATI;

// GL_ATI_map_object_buffer
NEL_PFNGLMAPOBJECTBUFFERATIPROC   				nglMapObjectBufferATI;
NEL_PFNGLUNMAPOBJECTBUFFERATIPROC 				nglUnmapObjectBufferATI;

// GL_ATI_vertex_attrib_array_object
NEL_PFNGLVERTEXATTRIBARRAYOBJECTATIPROC			nglVertexAttribArrayObjectATI;
NEL_PFNGLGETVERTEXATTRIBARRAYOBJECTFVATIPROC	nglGetVertexAttribArrayObjectfvATI;
NEL_PFNGLGETVERTEXATTRIBARRAYOBJECTIVATIPROC	nglGetVertexAttribArrayObjectivATI;

// GL_ATI_envmap_bumpmap extension
PFNGLTEXBUMPPARAMETERIVATIPROC					nglTexBumpParameterivATI;
PFNGLTEXBUMPPARAMETERFVATIPROC					nglTexBumpParameterfvATI;
PFNGLGETTEXBUMPPARAMETERIVATIPROC				nglGetTexBumpParameterivATI;
PFNGLGETTEXBUMPPARAMETERFVATIPROC				nglGetTexBumpParameterfvATI;

// GL_ATI_fragment_shader extension
NEL_PFNGLGENFRAGMENTSHADERSATIPROC				nglGenFragmentShadersATI;
NEL_PFNGLBINDFRAGMENTSHADERATIPROC				nglBindFragmentShaderATI;
NEL_PFNGLDELETEFRAGMENTSHADERATIPROC			nglDeleteFragmentShaderATI;
NEL_PFNGLBEGINFRAGMENTSHADERATIPROC				nglBeginFragmentShaderATI;
NEL_PFNGLENDFRAGMENTSHADERATIPROC				nglEndFragmentShaderATI;
NEL_PFNGLPASSTEXCOORDATIPROC					nglPassTexCoordATI;
NEL_PFNGLSAMPLEMAPATIPROC						nglSampleMapATI;
NEL_PFNGLCOLORFRAGMENTOP1ATIPROC				nglColorFragmentOp1ATI;
NEL_PFNGLCOLORFRAGMENTOP2ATIPROC				nglColorFragmentOp2ATI;
NEL_PFNGLCOLORFRAGMENTOP3ATIPROC				nglColorFragmentOp3ATI;
NEL_PFNGLALPHAFRAGMENTOP1ATIPROC				nglAlphaFragmentOp1ATI;
NEL_PFNGLALPHAFRAGMENTOP2ATIPROC				nglAlphaFragmentOp2ATI;
NEL_PFNGLALPHAFRAGMENTOP3ATIPROC				nglAlphaFragmentOp3ATI;
NEL_PFNGLSETFRAGMENTSHADERCONSTANTATIPROC		nglSetFragmentShaderConstantATI;

// GL_ARB_fragment_program
// the following functions are the sames than with GL_ARB_vertex_program
//NEL_PFNGLPROGRAMSTRINGARBPROC					nglProgramStringARB;
//NEL_PFNGLBINDPROGRAMARBPROC					nglBindProgramARB;
//NEL_PFNGLDELETEPROGRAMSARBPROC				nglDeleteProgramsARB;
//NEL_PFNGLGENPROGRAMSARBPROC					nglGenProgramsARB;
//NEL_PFNGLPROGRAMENVPARAMETER4DARBPROC			nglProgramEnvParameter4dARB;
//NEL_PFNGLPROGRAMENVPARAMETER4DVARBPROC		nglProgramEnvParameter4dvARB;
//NEL_PFNGLPROGRAMENVPARAMETER4FARBPROC			nglProgramEnvParameter4fARB;
//NEL_PFNGLPROGRAMENVPARAMETER4FVARBPROC		nglProgramEnvParameter4fvARB;
NEL_PFNGLPROGRAMLOCALPARAMETER4DARBPROC			nglGetProgramLocalParameter4dARB;
NEL_PFNGLPROGRAMLOCALPARAMETER4DVARBPROC		nglGetProgramLocalParameter4dvARB;
NEL_PFNGLPROGRAMLOCALPARAMETER4FARBPROC			nglGetProgramLocalParameter4fARB;
NEL_PFNGLPROGRAMLOCALPARAMETER4FVARBPROC		nglGetProgramLocalParameter4fvARB;
//NEL_PFNGLGETPROGRAMENVPARAMETERDVARBPROC		nglGetProgramEnvParameterdvARB;
//NEL_PFNGLGETPROGRAMENVPARAMETERFVARBPROC		nglGetProgramEnvParameterfvARB;
//NEL_PFNGLGETPROGRAMLOCALPARAMETERDVARBPROC	nglGetProgramLocalParameterdvARB;
//NEL_PFNGLGETPROGRAMLOCALPARAMETERFVARBPROC	nglGetProgramLocalParameterfvARB;
//NEL_PFNGLGETPROGRAMIVARBPROC					nglGetProgramivARB;
//NEL_PFNGLGETPROGRAMSTRINGARBPROC				nglGetProgramStringARB;
//NEL_PFNGLISPROGRAMARBPROC						nglIsProgramARB;

// GL_ARB_vertex_buffer_object
PFNGLBINDBUFFERARBPROC							nglBindBufferARB;
PFNGLDELETEBUFFERSARBPROC						nglDeleteBuffersARB;
PFNGLGENBUFFERSARBPROC							nglGenBuffersARB;
PFNGLISBUFFERARBPROC 							nglIsBufferARB;
PFNGLBUFFERDATAARBPROC 							nglBufferDataARB;
PFNGLBUFFERSUBDATAARBPROC 						nglBufferSubDataARB;
PFNGLGETBUFFERSUBDATAARBPROC 					nglGetBufferSubDataARB;
PFNGLMAPBUFFERARBPROC 							nglMapBufferARB;
PFNGLUNMAPBUFFERARBPROC 						nglUnmapBufferARB;
PFNGLGETBUFFERPARAMETERIVARBPROC 				nglGetBufferParameterivARB;
PFNGLGETBUFFERPOINTERVARBPROC 					nglGetBufferPointervARB;

// GL_ARB_vertex_program
PFNGLVERTEXATTRIB1SARBPROC						nglVertexAttrib1sARB;
PFNGLVERTEXATTRIB1FARBPROC						nglVertexAttrib1fARB;
PFNGLVERTEXATTRIB1DARBPROC						nglVertexAttrib1dARB;
PFNGLVERTEXATTRIB2SARBPROC						nglVertexAttrib2sARB;
PFNGLVERTEXATTRIB2FARBPROC						nglVertexAttrib2fARB;
PFNGLVERTEXATTRIB2DARBPROC						nglVertexAttrib2dARB;
PFNGLVERTEXATTRIB3SARBPROC						nglVertexAttrib3sARB;
PFNGLVERTEXATTRIB3FARBPROC						nglVertexAttrib3fARB;
PFNGLVERTEXATTRIB3DARBPROC						nglVertexAttrib3dARB;
PFNGLVERTEXATTRIB4SARBPROC						nglVertexAttrib4sARB;
PFNGLVERTEXATTRIB4FARBPROC						nglVertexAttrib4fARB;
PFNGLVERTEXATTRIB4DARBPROC						nglVertexAttrib4dARB;
PFNGLVERTEXATTRIB4NUBARBPROC					nglVertexAttrib4NubARB;
PFNGLVERTEXATTRIB1SVARBPROC						nglVertexAttrib1svARB;
PFNGLVERTEXATTRIB1FVARBPROC						nglVertexAttrib1fvARB;
PFNGLVERTEXATTRIB1DVARBPROC						nglVertexAttrib1dvARB;
PFNGLVERTEXATTRIB2SVARBPROC						nglVertexAttrib2svARB;
PFNGLVERTEXATTRIB2FVARBPROC						nglVertexAttrib2fvARB;
PFNGLVERTEXATTRIB2DVARBPROC						nglVertexAttrib2dvARB;
PFNGLVERTEXATTRIB3SVARBPROC						nglVertexAttrib3svARB;
PFNGLVERTEXATTRIB3FVARBPROC						nglVertexAttrib3fvARB;
PFNGLVERTEXATTRIB3DVARBPROC						nglVertexAttrib3dvARB;
PFNGLVERTEXATTRIB4BVARBPROC						nglVertexAttrib4bvARB;
PFNGLVERTEXATTRIB4SVARBPROC						nglVertexAttrib4svARB;
PFNGLVERTEXATTRIB4IVARBPROC						nglVertexAttrib4ivARB;
PFNGLVERTEXATTRIB4UBVARBPROC					nglVertexAttrib4ubvARB;
PFNGLVERTEXATTRIB4USVARBPROC					nglVertexAttrib4usvARB;
PFNGLVERTEXATTRIB4UIVARBPROC					nglVertexAttrib4uivARB;
PFNGLVERTEXATTRIB4FVARBPROC						nglVertexAttrib4fvARB;
PFNGLVERTEXATTRIB4DVARBPROC						nglVertexAttrib4dvARB;
PFNGLVERTEXATTRIB4NBVARBPROC					nglVertexAttrib4NbvARB;
PFNGLVERTEXATTRIB4NSVARBPROC					nglVertexAttrib4NsvARB;
PFNGLVERTEXATTRIB4NIVARBPROC					nglVertexAttrib4NivARB;
PFNGLVERTEXATTRIB4NUBVARBPROC					nglVertexAttrib4NubvARB;
PFNGLVERTEXATTRIB4NUSVARBPROC					nglVertexAttrib4NusvARB;
PFNGLVERTEXATTRIB4NUIVARBPROC					nglVertexAttrib4NuivARB;
PFNGLVERTEXATTRIBPOINTERARBPROC					nglVertexAttribPointerARB;
PFNGLENABLEVERTEXATTRIBARRAYARBPROC				nglEnableVertexAttribArrayARB;
PFNGLDISABLEVERTEXATTRIBARRAYARBPROC			nglDisableVertexAttribArrayARB;
PFNGLPROGRAMSTRINGARBPROC						nglProgramStringARB;
PFNGLBINDPROGRAMARBPROC							nglBindProgramARB;
PFNGLDELETEPROGRAMSARBPROC						nglDeleteProgramsARB;
PFNGLGENPROGRAMSARBPROC							nglGenProgramsARB;
PFNGLPROGRAMENVPARAMETER4FARBPROC				nglProgramEnvParameter4fARB;
PFNGLPROGRAMENVPARAMETER4DARBPROC				nglProgramEnvParameter4dARB;
PFNGLPROGRAMENVPARAMETER4FVARBPROC				nglProgramEnvParameter4fvARB;
PFNGLPROGRAMENVPARAMETER4DVARBPROC				nglProgramEnvParameter4dvARB;
PFNGLPROGRAMLOCALPARAMETER4FARBPROC				nglProgramLocalParameter4fARB;
PFNGLPROGRAMLOCALPARAMETER4DARBPROC				nglProgramLocalParameter4dARB;
PFNGLPROGRAMLOCALPARAMETER4FVARBPROC			nglProgramLocalParameter4fvARB;
PFNGLPROGRAMLOCALPARAMETER4DVARBPROC			nglProgramLocalParameter4dvARB;
PFNGLGETPROGRAMENVPARAMETERFVARBPROC			nglGetProgramEnvParameterfvARB;
PFNGLGETPROGRAMENVPARAMETERDVARBPROC			nglGetProgramEnvParameterdvARB;
PFNGLGETPROGRAMLOCALPARAMETERFVARBPROC			nglGetProgramLocalParameterfvARB;
PFNGLGETPROGRAMLOCALPARAMETERDVARBPROC			nglGetProgramLocalParameterdvARB;
PFNGLGETPROGRAMIVARBPROC						nglGetProgramivARB;
PFNGLGETPROGRAMSTRINGARBPROC					nglGetProgramStringARB;
PFNGLGETVERTEXATTRIBDVARBPROC					nglGetVertexAttribdvARB;
PFNGLGETVERTEXATTRIBFVARBPROC					nglGetVertexAttribfvARB;
PFNGLGETVERTEXATTRIBIVARBPROC					nglGetVertexAttribivARB;
PFNGLGETVERTEXATTRIBPOINTERVARBPROC				nglGetVertexAttribPointervARB;
PFNGLISPROGRAMARBPROC							nglIsProgramARB;

// NV_occlusion_query
NEL_PFNGLGENOCCLUSIONQUERIESNVPROC				nglGenOcclusionQueriesNV;
NEL_PFNGLDELETEOCCLUSIONQUERIESNVPROC			nglDeleteOcclusionQueriesNV;
NEL_PFNGLISOCCLUSIONQUERYNVPROC					nglIsOcclusionQueryNV;
NEL_PFNGLBEGINOCCLUSIONQUERYNVPROC				nglBeginOcclusionQueryNV;
NEL_PFNGLENDOCCLUSIONQUERYNVPROC				nglEndOcclusionQueryNV;
NEL_PFNGLGETOCCLUSIONQUERYIVNVPROC				nglGetOcclusionQueryivNV;
NEL_PFNGLGETOCCLUSIONQUERYUIVNVPROC				nglGetOcclusionQueryuivNV;

// GL_EXT_framebuffer_object
NEL_PFNGLISRENDERBUFFEREXTPROC					nglIsRenderbufferEXT;
NEL_PFNGLISFRAMEBUFFEREXTPROC					nglIsFramebufferEXT;
NEL_PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC			nglCheckFramebufferStatusEXT;
NEL_PFNGLGENFRAMEBUFFERSEXTPROC					nglGenFramebuffersEXT;
NEL_PFNGLBINDFRAMEBUFFEREXTPROC					nglBindFramebufferEXT;
NEL_PFNGLFRAMEBUFFERTEXTURE2DEXTPROC			nglFramebufferTexture2DEXT;
NEL_PFNGLGENRENDERBUFFERSEXTPROC				nglGenRenderbuffersEXT;
NEL_PFNGLBINDRENDERBUFFEREXTPROC				nglBindRenderbufferEXT;
NEL_PFNGLRENDERBUFFERSTORAGEEXTPROC				nglRenderbufferStorageEXT;
NEL_PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC			nglFramebufferRenderbufferEXT;
NEL_PFNGLDELETERENDERBUFFERSEXTPROC				nglDeleteRenderbuffersEXT;
NEL_PFNGLDELETEFRAMEBUFFERSEXTPROC				nglDeleteFramebuffersEXT;

#ifdef NL_OS_WINDOWS
PFNWGLALLOCATEMEMORYNVPROC						nwglAllocateMemoryNV;
PFNWGLFREEMEMORYNVPROC							nwglFreeMemoryNV;

// Pbuffer extension
PFNWGLCREATEPBUFFERARBPROC						nwglCreatePbufferARB;
PFNWGLGETPUFFERDCARBPROC						nwglGetPbufferDCARB;
PFNWGLRELEASEPUFFERDCARBPROC					nwglReleasePbufferDCARB;
PFNWGLDESTROYPUFFERARBPROC						nwglDestroyPbufferARB;
PFNWGLQUERYPBUFFERARBPROC						nwglQueryPbufferARB;

// Get Pixel format extension
PFNWGLGETPIXELFORMATATTRIBIVARBPROC				nwglGetPixelFormatAttribivARB;
PFNWGLGETPIXELFORMATATTRIBFVARBPROC				nwglGetPixelFormatAttribfvARB;
PFNWGLCHOOSEPIXELFORMATARBPROC					nwglChoosePixelFormatARB;

// Swap control extension
PFNWGLSWAPINTERVALEXTPROC						nwglSwapIntervalEXT;
PFNWGLGETSWAPINTERVALEXTPROC					nwglGetSwapIntervalEXT;

// WGL_ARB_extensions_string
PFNWGFGETEXTENSIONSSTRINGARB					nwglGetExtensionsStringARB;
#endif


// ***************************************************************************
// ***************************************************************************
// ***************************************************************************
// ***************************************************************************


namespace	NL3D
{

#define CHECK_EXT(ext_str) \
	if(strstr(glext, ext_str)==NULL) { nlwarning("3D: OpengGL extension '%s' was not found", ext_str); return false; } else { nldebug("3D: OpengGL Extension '%s' found", ext_str); }

// Debug: don't return false if the procaddr returns 0
// It means that it can crash if nel calls this extension but at least we have a warning to know why the extension is available but not the procaddr
#define CHECK_ADDRESS(type, ext) \
	n##ext=(type)nglGetProcAddress(#ext); \
	if(!n##ext) { nlwarning("3D: GetProcAddress(\"%s\") returns NULL", #ext); return false; } else { /*nldebug("3D: GetProcAddress(\"%s\") succeed", #ext);*/ }

// ***************************************************************************
// Extensions registrations, and Windows function Registration.

// *********************************
static bool setupARBMultiTexture(const char	*glext)
{
	H_AUTO_OGL(setupARBMultiTexture);
	CHECK_EXT("GL_ARB_multitexture");

	CHECK_ADDRESS(NEL_PFNGLACTIVETEXTUREARBPROC, glActiveTextureARB);
	CHECK_ADDRESS(NEL_PFNGLCLIENTACTIVETEXTUREARBPROC, glClientActiveTextureARB);

	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD1SARBPROC, glMultiTexCoord1sARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD1IARBPROC, glMultiTexCoord1iARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD1FARBPROC, glMultiTexCoord1fARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD1DARBPROC, glMultiTexCoord1dARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD2SARBPROC, glMultiTexCoord2sARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD2IARBPROC, glMultiTexCoord2iARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD2FARBPROC, glMultiTexCoord2fARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD2DARBPROC, glMultiTexCoord2dARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD3SARBPROC, glMultiTexCoord3sARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD3IARBPROC, glMultiTexCoord3iARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD3FARBPROC, glMultiTexCoord3fARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD3DARBPROC, glMultiTexCoord3dARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD4SARBPROC, glMultiTexCoord4sARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD4IARBPROC, glMultiTexCoord4iARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD4FARBPROC, glMultiTexCoord4fARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD4DARBPROC, glMultiTexCoord4dARB);

	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD1SVARBPROC, glMultiTexCoord1svARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD1IVARBPROC, glMultiTexCoord1ivARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD1FVARBPROC, glMultiTexCoord1fvARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD1DVARBPROC, glMultiTexCoord1dvARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD2SVARBPROC, glMultiTexCoord2svARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD2IVARBPROC, glMultiTexCoord2ivARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD2FVARBPROC, glMultiTexCoord2fvARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD2DVARBPROC, glMultiTexCoord2dvARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD3SVARBPROC, glMultiTexCoord3svARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD3IVARBPROC, glMultiTexCoord3ivARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD3FVARBPROC, glMultiTexCoord3fvARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD3DVARBPROC, glMultiTexCoord3dvARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD4SVARBPROC, glMultiTexCoord4svARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD4IVARBPROC, glMultiTexCoord4ivARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD4FVARBPROC, glMultiTexCoord4fvARB);
	CHECK_ADDRESS(NEL_PFNGLMULTITEXCOORD4DVARBPROC, glMultiTexCoord4dvARB);

	return true;
}


// *********************************
static bool setupEXTTextureEnvCombine(const char	*glext)
{
	H_AUTO_OGL(setupEXTTextureEnvCombine);
	return (strstr(glext, "GL_EXT_texture_env_combine")!=NULL || strstr(glext, "GL_ARB_texture_env_combine")!=NULL);
}


// *********************************
static bool	setupARBTextureCompression(const char	*glext)
{
	H_AUTO_OGL(setupARBTextureCompression);
	CHECK_EXT("GL_ARB_texture_compression");

	CHECK_ADDRESS(NEL_PFNGLCOMPRESSEDTEXIMAGE3DARBPROC, glCompressedTexImage3DARB);
	CHECK_ADDRESS(NEL_PFNGLCOMPRESSEDTEXIMAGE2DARBPROC, glCompressedTexImage2DARB);
	CHECK_ADDRESS(NEL_PFNGLCOMPRESSEDTEXIMAGE1DARBPROC, glCompressedTexImage1DARB);
	CHECK_ADDRESS(NEL_PFNGLCOMPRESSEDTEXSUBIMAGE3DARBPROC, glCompressedTexSubImage3DARB);
	CHECK_ADDRESS(NEL_PFNGLCOMPRESSEDTEXSUBIMAGE2DARBPROC, glCompressedTexSubImage2DARB);
	CHECK_ADDRESS(NEL_PFNGLCOMPRESSEDTEXSUBIMAGE1DARBPROC, glCompressedTexSubImage1DARB);
	CHECK_ADDRESS(NEL_PFNGLGETCOMPRESSEDTEXIMAGEARBPROC, glGetCompressedTexImageARB);

	return true;
}


// *********************************
static bool	setupARBTextureNonPowerOfTwo(const char	*glext)
{
	H_AUTO_OGL(setupARBTextureCompression);
	CHECK_EXT("GL_ARB_texture_non_power_of_two");

	return true;
}


// *********************************
static bool	setupNVVertexArrayRange(const char	*glext)
{
	H_AUTO_OGL(setupNVVertexArrayRange);
#ifndef NL_OS_WINDOWS
	return false;
#endif

	// Test if VAR is present.
	CHECK_EXT("GL_NV_vertex_array_range");

	// Tess Fence too.
	CHECK_EXT("GL_NV_fence");

	// Get VAR address.
	CHECK_ADDRESS(NEL_PFNGLFLUSHVERTEXARRAYRANGENVPROC, glFlushVertexArrayRangeNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXARRAYRANGENVPROC, glVertexArrayRangeNV);
#ifdef NL_OS_WINDOWS
	CHECK_ADDRESS(PFNWGLALLOCATEMEMORYNVPROC, wglAllocateMemoryNV);
	CHECK_ADDRESS(PFNWGLFREEMEMORYNVPROC, wglFreeMemoryNV);
#endif

	// Get fence address.
	CHECK_ADDRESS(NEL_PFNGLDELETEFENCESNVPROC, glDeleteFencesNV);
	CHECK_ADDRESS(NEL_PFNGLGENFENCESNVPROC, glGenFencesNV);
	CHECK_ADDRESS(NEL_PFNGLISFENCENVPROC, glIsFenceNV);
	CHECK_ADDRESS(NEL_PFNGLTESTFENCENVPROC, glTestFenceNV);
	CHECK_ADDRESS(NEL_PFNGLGETFENCEIVNVPROC, glGetFenceivNV);
	CHECK_ADDRESS(NEL_PFNGLFINISHFENCENVPROC, glFinishFenceNV);
	CHECK_ADDRESS(NEL_PFNGLSETFENCENVPROC, glSetFenceNV);


	return true;
}


// *********************************
static bool	setupEXTTextureCompressionS3TC(const char	*glext)
{
	H_AUTO_OGL(setupEXTTextureCompressionS3TC);
	CHECK_EXT("GL_EXT_texture_compression_s3tc");
	return true;
}


// *********************************
static bool	setupEXTVertexWeighting(const char	*glext)
{
	H_AUTO_OGL(setupEXTVertexWeighting);
	CHECK_EXT("GL_EXT_vertex_weighting");

	CHECK_ADDRESS(NEL_PFNGLVERTEXWEIGHTFEXTPROC, glVertexWeightfEXT);
	CHECK_ADDRESS(NEL_PFNGLVERTEXWEIGHTFVEXTPROC, glVertexWeightfvEXT);
	CHECK_ADDRESS(NEL_PFNGLVERTEXWEIGHTPOINTEREXTPROC, glVertexWeightPointerEXT);

	return true;
}


// *********************************
static bool	setupEXTSeparateSpecularColor(const char	*glext)
{
	H_AUTO_OGL(setupEXTSeparateSpecularColor);
	CHECK_EXT("GL_EXT_separate_specular_color");
	return true;
}


// *********************************
static bool	setupNVTextureEnvCombine4(const char	*glext)
{
	H_AUTO_OGL(setupNVTextureEnvCombine4);
	CHECK_EXT("GL_NV_texture_env_combine4");
	return true;
}

// *********************************
static bool	setupATITextureEnvCombine3(const char	*glext)
{
	H_AUTO_OGL(setupATITextureEnvCombine3);

#ifdef NL_OS_MAC
// Water doesn't render on GeForce 8600M GT (on MAC OS X) if this extension is enabled
	return false;
#endif

	CHECK_EXT("GL_ATI_texture_env_combine3");
	return true;
}

// *********************************
static bool	setupATIXTextureEnvRoute(const char * /* glext */)
{
	H_AUTO_OGL(setupATIXTextureEnvRoute);
	return false;
//	CHECK_EXT("GL_ATIX_texture_env_route");
//	return true;
}

// *********************************
static bool	setupATIEnvMapBumpMap(const char	*glext)
{
	H_AUTO_OGL(setupATIEnvMapBumpMap);
	CHECK_EXT("GL_ATI_envmap_bumpmap");

	CHECK_ADDRESS(PFNGLTEXBUMPPARAMETERIVATIPROC, glTexBumpParameterivATI);
	CHECK_ADDRESS(PFNGLTEXBUMPPARAMETERFVATIPROC, glTexBumpParameterfvATI);
	CHECK_ADDRESS(PFNGLGETTEXBUMPPARAMETERIVATIPROC, glGetTexBumpParameterivATI);
	CHECK_ADDRESS(PFNGLGETTEXBUMPPARAMETERFVATIPROC, glGetTexBumpParameterfvATI);

	// Check for broken ATI drivers and disable EMBM if we caught one.
	// Reminder: This code crashes with Catalyst 7.11 fglrx drivers!
	GLint num = -1;
	nglGetTexBumpParameterivATI(GL_BUMP_NUM_TEX_UNITS_ATI, &num);

	return num > 0;
}

// *********************************
static bool	setupARBTextureCubeMap(const char	*glext)
{
	H_AUTO_OGL(setupARBTextureCubeMap);
	CHECK_EXT("GL_ARB_texture_cube_map");
	return true;
}


// *********************************
static bool	setupNVVertexProgram(const char	*glext)
{
	H_AUTO_OGL(setupNVVertexProgram);

#ifdef NL_OS_MAC
// Water doesn't render on GeForce 8600M GT (on MAC OS X) if this extension is enabled
	return false;
#endif

	CHECK_EXT("GL_NV_vertex_program");
	CHECK_ADDRESS(NEL_PFNGLAREPROGRAMSRESIDENTNVPROC, glAreProgramsResidentNV);
	CHECK_ADDRESS(NEL_PFNGLBINDPROGRAMNVPROC, glBindProgramNV);
	CHECK_ADDRESS(NEL_PFNGLDELETEPROGRAMSNVPROC, glDeleteProgramsNV);
	CHECK_ADDRESS(NEL_PFNGLEXECUTEPROGRAMNVPROC, glExecuteProgramNV);
	CHECK_ADDRESS(NEL_PFNGLGENPROGRAMSNVPROC, glGenProgramsNV);
	CHECK_ADDRESS(NEL_PFNGLGETPROGRAMPARAMETERDVNVPROC, glGetProgramParameterdvNV);
	CHECK_ADDRESS(NEL_PFNGLGETPROGRAMPARAMETERFVNVPROC, glGetProgramParameterfvNV);
	CHECK_ADDRESS(NEL_PFNGLGETPROGRAMIVNVPROC, glGetProgramivNV);
	CHECK_ADDRESS(NEL_PFNGLGETPROGRAMSTRINGNVPROC, glGetProgramStringNV);
	CHECK_ADDRESS(NEL_PFNGLGETTRACKMATRIXIVNVPROC, glGetTrackMatrixivNV);
	CHECK_ADDRESS(NEL_PFNGLGETVERTEXATTRIBDVNVPROC, glGetVertexAttribdvNV);
	CHECK_ADDRESS(NEL_PFNGLGETVERTEXATTRIBFVNVPROC, glGetVertexAttribfvNV);
	CHECK_ADDRESS(NEL_PFNGLGETVERTEXATTRIBIVNVPROC, glGetVertexAttribivNV);
	CHECK_ADDRESS(NEL_PFNGLGETVERTEXATTRIBPOINTERVNVPROC, glGetVertexAttribPointervNV);
	CHECK_ADDRESS(NEL_PFNGLISPROGRAMNVPROC, glIsProgramNV);
	CHECK_ADDRESS(NEL_PFNGLLOADPROGRAMNVPROC, glLoadProgramNV);
	CHECK_ADDRESS(NEL_PFNGLPROGRAMPARAMETER4DNVPROC, glProgramParameter4dNV);
	CHECK_ADDRESS(NEL_PFNGLPROGRAMPARAMETER4DVNVPROC, glProgramParameter4dvNV);
	CHECK_ADDRESS(NEL_PFNGLPROGRAMPARAMETER4FNVPROC, glProgramParameter4fNV);
	CHECK_ADDRESS(NEL_PFNGLPROGRAMPARAMETER4FVNVPROC, glProgramParameter4fvNV);
	CHECK_ADDRESS(NEL_PFNGLPROGRAMPARAMETERS4DVNVPROC, glProgramParameters4dvNV);
	CHECK_ADDRESS(NEL_PFNGLPROGRAMPARAMETERS4FVNVPROC, glProgramParameters4fvNV);
	CHECK_ADDRESS(NEL_PFNGLREQUESTRESIDENTPROGRAMSNVPROC, glRequestResidentProgramsNV);
	CHECK_ADDRESS(NEL_PFNGLTRACKMATRIXNVPROC, glTrackMatrixNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIBPOINTERNVPROC, glVertexAttribPointerNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB1DNVPROC, glVertexAttrib1dNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB1DVNVPROC, glVertexAttrib1dvNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB1FNVPROC, glVertexAttrib1fNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB1FVNVPROC, glVertexAttrib1fvNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB1SNVPROC, glVertexAttrib1sNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB1SVNVPROC, glVertexAttrib1svNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB2DNVPROC, glVertexAttrib2dNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB2DVNVPROC, glVertexAttrib2dvNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB2FNVPROC, glVertexAttrib2fNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB2FVNVPROC, glVertexAttrib2fvNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB2SNVPROC, glVertexAttrib2sNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB2SVNVPROC, glVertexAttrib2svNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB3DNVPROC, glVertexAttrib3dNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB3DVNVPROC, glVertexAttrib3dvNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB3FNVPROC, glVertexAttrib3fNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB3FVNVPROC, glVertexAttrib3fvNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB3SNVPROC, glVertexAttrib3sNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB3SVNVPROC, glVertexAttrib3svNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB4DNVPROC, glVertexAttrib4dNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB4DVNVPROC, glVertexAttrib4dvNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB4FNVPROC, glVertexAttrib4fNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB4FVNVPROC, glVertexAttrib4fvNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB4SNVPROC, glVertexAttrib4sNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB4SVNVPROC, glVertexAttrib4svNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIB4UBVNVPROC, glVertexAttrib4ubvNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIBS1DVNVPROC, glVertexAttribs1dvNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIBS1FVNVPROC, glVertexAttribs1fvNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIBS1SVNVPROC, glVertexAttribs1svNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIBS2DVNVPROC, glVertexAttribs2dvNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIBS2FVNVPROC, glVertexAttribs2fvNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIBS2SVNVPROC, glVertexAttribs2svNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIBS3DVNVPROC, glVertexAttribs3dvNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIBS3FVNVPROC, glVertexAttribs3fvNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIBS3SVNVPROC, glVertexAttribs3svNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIBS4DVNVPROC, glVertexAttribs4dvNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIBS4FVNVPROC, glVertexAttribs4fvNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIBS4SVNVPROC, glVertexAttribs4svNV);
	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIBS4UBVNVPROC, glVertexAttribs4ubvNV);

	return true;
}

// *********************************
static bool	setupEXTVertexShader(const char	*glext)
{
	H_AUTO_OGL(setupEXTVertexShader);
	CHECK_EXT("GL_EXT_vertex_shader");

	CHECK_ADDRESS(NEL_PFNGLBEGINVERTEXSHADEREXTPROC, glBeginVertexShaderEXT);
	CHECK_ADDRESS(NEL_PFNGLENDVERTEXSHADEREXTPROC, glEndVertexShaderEXT);
	CHECK_ADDRESS(NEL_PFNGLBINDVERTEXSHADEREXTPROC, glBindVertexShaderEXT);
	CHECK_ADDRESS(NEL_PFNGLGENVERTEXSHADERSEXTPROC, glGenVertexShadersEXT);
	CHECK_ADDRESS(NEL_PFNGLDELETEVERTEXSHADEREXTPROC, glDeleteVertexShaderEXT);
	CHECK_ADDRESS(NEL_PFNGLSHADEROP1EXTPROC, glShaderOp1EXT);
	CHECK_ADDRESS(NEL_PFNGLSHADEROP2EXTPROC, glShaderOp2EXT);
	CHECK_ADDRESS(NEL_PFNGLSHADEROP3EXTPROC, glShaderOp3EXT);
	CHECK_ADDRESS(NEL_PFNGLSWIZZLEEXTPROC, glSwizzleEXT);
	CHECK_ADDRESS(NEL_PFNGLWRITEMASKEXTPROC, glWriteMaskEXT);
	CHECK_ADDRESS(NEL_PFNGLINSERTCOMPONENTEXTPROC, glInsertComponentEXT);
	CHECK_ADDRESS(NEL_PFNGLEXTRACTCOMPONENTEXTPROC, glExtractComponentEXT);
	CHECK_ADDRESS(NEL_PFNGLGENSYMBOLSEXTPROC, glGenSymbolsEXT);
	CHECK_ADDRESS(NEL_PFNGLSETINVARIANTEXTPROC, glSetInvariantEXT);
	CHECK_ADDRESS(NEL_PFNGLSETLOCALCONSTANTEXTPROC, glSetLocalConstantEXT);
	CHECK_ADDRESS(NEL_PFNGLVARIANTPOINTEREXTPROC, glVariantPointerEXT);
	CHECK_ADDRESS(NEL_PFNGLENABLEVARIANTCLIENTSTATEEXTPROC, glEnableVariantClientStateEXT);
	CHECK_ADDRESS(NEL_PFNGLDISABLEVARIANTCLIENTSTATEEXTPROC, glDisableVariantClientStateEXT);
	CHECK_ADDRESS(NEL_PFNGLBINDLIGHTPARAMETEREXTPROC, glBindLightParameterEXT);
	CHECK_ADDRESS(NEL_PFNGLBINDMATERIALPARAMETEREXTPROC, glBindMaterialParameterEXT);
	CHECK_ADDRESS(NEL_PFNGLBINDTEXGENPARAMETEREXTPROC, glBindTexGenParameterEXT);
	CHECK_ADDRESS(NEL_PFNGLBINDTEXTUREUNITPARAMETEREXTPROC, glBindTextureUnitParameterEXT);
	CHECK_ADDRESS(NEL_PFNGLBINDPARAMETEREXTPROC, glBindParameterEXT);
	CHECK_ADDRESS(NEL_PFNGLISVARIANTENABLEDEXTPROC, glIsVariantEnabledEXT);
	CHECK_ADDRESS(NEL_PFNGLGETVARIANTBOOLEANVEXTPROC, glGetVariantBooleanvEXT);
	CHECK_ADDRESS(NEL_PFNGLGETVARIANTINTEGERVEXTPROC, glGetVariantIntegervEXT);
	CHECK_ADDRESS(NEL_PFNGLGETVARIANTFLOATVEXTPROC, glGetVariantFloatvEXT);
	CHECK_ADDRESS(NEL_PFNGLGETVARIANTPOINTERVEXTPROC, glGetVariantPointervEXT);
	CHECK_ADDRESS(NEL_PFNGLGETINVARIANTBOOLEANVEXTPROC, glGetInvariantBooleanvEXT);
	CHECK_ADDRESS(NEL_PFNGLGETINVARIANTINTEGERVEXTPROC, glGetInvariantIntegervEXT);
	CHECK_ADDRESS(NEL_PFNGLGETINVARIANTFLOATVEXTPROC, glGetInvariantFloatvEXT);
	CHECK_ADDRESS(NEL_PFNGLGETLOCALCONSTANTBOOLEANVEXTPROC, glGetLocalConstantBooleanvEXT);
	CHECK_ADDRESS(NEL_PFNGLGETLOCALCONSTANTINTEGERVEXTPROC, glGetLocalConstantIntegervEXT);
	CHECK_ADDRESS(NEL_PFNGLGETLOCALCONSTANTFLOATVEXTPROC, glGetLocalConstantFloatvEXT);

	// we require at least 128 instructions, 15 local register (r0, r1,..,r11) + 3 temporary vector for swizzle emulation + 1 vector for indexing temp + 3 temporary scalar for LOGG, EXPP and LIT emulation,  1 address register
	// we require 11 variants (4 textures + position + normal + primary color + secondary color + weight + palette skin + fog)
	// we also require 2 local constants (0 and 1)
	// 96 invariants (c[0], c[1] ..) + 1 invariants for fog emulation (fog coordinate must range from 0 to 1 with EXT_VERTEX_shader)
	GLint numVSInst;
	glGetIntegerv(GL_MAX_OPTIMIZED_VERTEX_SHADER_INSTRUCTIONS_EXT, &numVSInst);
	if (numVSInst < 128) return false;
	//
	GLint numVSLocals;
	glGetIntegerv(GL_MAX_VERTEX_SHADER_LOCALS_EXT, &numVSLocals);
	if (numVSLocals < 4 * (12 + 4) + 1 + 3)
	{
		nlwarning("EXT_vertex_shader extension has not much register. Some vertex programm may fail loading");
		return false;
	}
	//
	GLint numVSLocalConstants;
	glGetIntegerv(GL_MAX_VERTEX_SHADER_LOCAL_CONSTANTS_EXT, &numVSLocalConstants);
	if (numVSLocalConstants < 2) return false;
	//
	GLint numVSInvariants;
	glGetIntegerv(GL_MAX_OPTIMIZED_VERTEX_SHADER_INVARIANTS_EXT, &numVSInvariants);
	if (numVSInvariants < 96 + 1) return false;
	//
	GLint numVSVariants;
	glGetIntegerv(GL_MAX_VERTEX_SHADER_VARIANTS_EXT, &numVSVariants);
	if (numVSInvariants < 4) return false;

	return true;

}


// *********************************
static bool	setupEXTSecondaryColor(const char	*glext)
{
	H_AUTO_OGL(setupEXTSecondaryColor);
	CHECK_EXT("GL_EXT_secondary_color");

	CHECK_ADDRESS(NEL_PFNGLSECONDARYCOLOR3BEXTPROC, glSecondaryColor3bEXT);
	CHECK_ADDRESS(NEL_PFNGLSECONDARYCOLOR3BVEXTPROC, glSecondaryColor3bvEXT);
	CHECK_ADDRESS(NEL_PFNGLSECONDARYCOLOR3DEXTPROC, glSecondaryColor3dEXT);
	CHECK_ADDRESS(NEL_PFNGLSECONDARYCOLOR3DVEXTPROC, glSecondaryColor3dvEXT);
	CHECK_ADDRESS(NEL_PFNGLSECONDARYCOLOR3FEXTPROC, glSecondaryColor3fEXT);
	CHECK_ADDRESS(NEL_PFNGLSECONDARYCOLOR3FVEXTPROC, glSecondaryColor3fvEXT);
	CHECK_ADDRESS(NEL_PFNGLSECONDARYCOLOR3IEXTPROC, glSecondaryColor3iEXT);
	CHECK_ADDRESS(NEL_PFNGLSECONDARYCOLOR3IVEXTPROC, glSecondaryColor3ivEXT);
	CHECK_ADDRESS(NEL_PFNGLSECONDARYCOLOR3SEXTPROC, glSecondaryColor3sEXT);
	CHECK_ADDRESS(NEL_PFNGLSECONDARYCOLOR3SVEXTPROC, glSecondaryColor3svEXT);
	CHECK_ADDRESS(NEL_PFNGLSECONDARYCOLOR3UBEXTPROC, glSecondaryColor3ubEXT);
	CHECK_ADDRESS(NEL_PFNGLSECONDARYCOLOR3UBVEXTPROC, glSecondaryColor3ubvEXT);
	CHECK_ADDRESS(NEL_PFNGLSECONDARYCOLOR3UIEXTPROC, glSecondaryColor3uiEXT);
	CHECK_ADDRESS(NEL_PFNGLSECONDARYCOLOR3UIVEXTPROC, glSecondaryColor3uivEXT);
	CHECK_ADDRESS(NEL_PFNGLSECONDARYCOLOR3USEXTPROC, glSecondaryColor3usEXT);
	CHECK_ADDRESS(NEL_PFNGLSECONDARYCOLOR3USVEXTPROC, glSecondaryColor3usvEXT);
	CHECK_ADDRESS(NEL_PFNGLSECONDARYCOLORPOINTEREXTPROC, glSecondaryColorPointerEXT);

	return true;
}

// *********************************
static bool	setupWGLARBPBuffer(const char	*glext)
{
	H_AUTO_OGL(setupWGLARBPBuffer);
	CHECK_EXT("WGL_ARB_pbuffer");

#ifdef NL_OS_WINDOWS
	CHECK_ADDRESS(PFNWGLCREATEPBUFFERARBPROC, wglCreatePbufferARB);
	CHECK_ADDRESS(PFNWGLGETPUFFERDCARBPROC, wglGetPbufferDCARB);
	CHECK_ADDRESS(PFNWGLRELEASEPUFFERDCARBPROC, wglReleasePbufferDCARB);
	CHECK_ADDRESS(PFNWGLDESTROYPUFFERARBPROC, wglDestroyPbufferARB);
	CHECK_ADDRESS(PFNWGLQUERYPBUFFERARBPROC, wglQueryPbufferARB);
#endif

	return true;
}

#ifdef NL_OS_WINDOWS
// *********************************
static bool	setupWGLARBPixelFormat (const char	*glext)
{
	H_AUTO_OGL(setupWGLARBPixelFormat);
	CHECK_EXT("WGL_ARB_pixel_format");

	CHECK_ADDRESS(PFNWGLGETPIXELFORMATATTRIBIVARBPROC, wglGetPixelFormatAttribivARB);
	CHECK_ADDRESS(PFNWGLGETPIXELFORMATATTRIBFVARBPROC, wglGetPixelFormatAttribfvARB);
	CHECK_ADDRESS(PFNWGLCHOOSEPIXELFORMATARBPROC, wglChoosePixelFormatARB);

	return true;
}
#endif

// *********************************
static bool	setupNVTextureShader(const char	*glext)
{
	H_AUTO_OGL(setupNVTextureShader);

#ifdef NL_OS_MAC
// Water doesn't render on GeForce 8600M GT (on MAC OS X) if this extension is enabled
	return false;
#endif

	CHECK_EXT("GL_NV_texture_shader");
	return true;
}


// *********************************
static bool	setupEXTBlendColor(const char	*glext)
{
	H_AUTO_OGL(setupEXTBlendColor);
	CHECK_EXT("GL_EXT_blend_color");
	CHECK_ADDRESS(NEL_PFNGLBLENDCOLOREXTPROC, glBlendColorEXT);
	return true;
}


// *********************************
static bool	setupNVVertexArrayRange2(const char	*glext)
{
	H_AUTO_OGL(setupNVVertexArrayRange2);
	CHECK_EXT("GL_NV_vertex_array_range2");
	return true;
}


// *********************************
static bool	setupATIVertexArrayObject(const char *glext)
{
	H_AUTO_OGL(setupATIVertexArrayObject);
	CHECK_EXT("GL_ATI_vertex_array_object");

	CHECK_ADDRESS(NEL_PFNGLNEWOBJECTBUFFERATIPROC, glNewObjectBufferATI);
	CHECK_ADDRESS(NEL_PFNGLISOBJECTBUFFERATIPROC, glIsObjectBufferATI);
	CHECK_ADDRESS(NEL_PFNGLUPDATEOBJECTBUFFERATIPROC, glUpdateObjectBufferATI);
	CHECK_ADDRESS(NEL_PFNGLGETOBJECTBUFFERFVATIPROC, glGetObjectBufferfvATI);
	CHECK_ADDRESS(NEL_PFNGLGETOBJECTBUFFERIVATIPROC, glGetObjectBufferivATI);

	nglDeleteObjectBufferATI = (NEL_PFNGLDELETEOBJECTBUFFERATIPROC)nglGetProcAddress("nglDeleteObjectBufferATI");

	if(!nglDeleteObjectBufferATI)
	{
		// seems that on matrox parhelia driver, this procedure is named nglFreeObjectBufferATI !!
		nglDeleteObjectBufferATI = (NEL_PFNGLDELETEOBJECTBUFFERATIPROC)nglGetProcAddress("nglFreeObjectBufferATI");
		if(!nglDeleteObjectBufferATI) return false;
	}

	CHECK_ADDRESS(NEL_PFNGLARRAYOBJECTATIPROC, glArrayObjectATI);
	CHECK_ADDRESS(NEL_PFNGLGETARRAYOBJECTFVATIPROC, glGetArrayObjectfvATI);
	CHECK_ADDRESS(NEL_PFNGLGETARRAYOBJECTIVATIPROC, glGetArrayObjectivATI);

	if(strstr(glext, "GL_EXT_vertex_shader") != NULL)
	{
		// the following exist only if ext vertex shader is present
		CHECK_ADDRESS(NEL_PFNGLVARIANTARRAYOBJECTATIPROC, glVariantArrayObjectATI);
		CHECK_ADDRESS(NEL_PFNGLGETVARIANTARRAYOBJECTFVATIPROC, glGetVariantArrayObjectfvATI);
		CHECK_ADDRESS(NEL_PFNGLGETVARIANTARRAYOBJECTIVATIPROC, glGetVariantArrayObjectivATI);
	}
	return true;
}


static bool	setupATIMapObjectBuffer(const char *glext)
{
	H_AUTO_OGL(setupATIMapObjectBuffer);
	CHECK_EXT("GL_ATI_map_object_buffer");
	CHECK_ADDRESS(NEL_PFNGLMAPOBJECTBUFFERATIPROC, glMapObjectBufferATI);
	CHECK_ADDRESS(NEL_PFNGLUNMAPOBJECTBUFFERATIPROC, glUnmapObjectBufferATI);
	return true;
}



// *********************************
static bool	setupATIFragmentShader(const char *glext)
{
	H_AUTO_OGL(setupATIFragmentShader);
	CHECK_EXT("GL_ATI_fragment_shader");

	CHECK_ADDRESS(NEL_PFNGLGENFRAGMENTSHADERSATIPROC, glGenFragmentShadersATI);
	CHECK_ADDRESS(NEL_PFNGLBINDFRAGMENTSHADERATIPROC, glBindFragmentShaderATI);
	CHECK_ADDRESS(NEL_PFNGLDELETEFRAGMENTSHADERATIPROC, glDeleteFragmentShaderATI);
	CHECK_ADDRESS(NEL_PFNGLBEGINFRAGMENTSHADERATIPROC, glBeginFragmentShaderATI);
	CHECK_ADDRESS(NEL_PFNGLENDFRAGMENTSHADERATIPROC, glEndFragmentShaderATI);
	CHECK_ADDRESS(NEL_PFNGLPASSTEXCOORDATIPROC, glPassTexCoordATI);
	CHECK_ADDRESS(NEL_PFNGLSAMPLEMAPATIPROC, glSampleMapATI);
	CHECK_ADDRESS(NEL_PFNGLCOLORFRAGMENTOP1ATIPROC, glColorFragmentOp1ATI);
	CHECK_ADDRESS(NEL_PFNGLCOLORFRAGMENTOP2ATIPROC, glColorFragmentOp2ATI);
	CHECK_ADDRESS(NEL_PFNGLCOLORFRAGMENTOP3ATIPROC, glColorFragmentOp3ATI);
	CHECK_ADDRESS(NEL_PFNGLALPHAFRAGMENTOP1ATIPROC, glAlphaFragmentOp1ATI);
	CHECK_ADDRESS(NEL_PFNGLALPHAFRAGMENTOP2ATIPROC, glAlphaFragmentOp2ATI);
	CHECK_ADDRESS(NEL_PFNGLALPHAFRAGMENTOP3ATIPROC, glAlphaFragmentOp3ATI);
	CHECK_ADDRESS(NEL_PFNGLSETFRAGMENTSHADERCONSTANTATIPROC, glSetFragmentShaderConstantATI);

	return true;
}

// *********************************
static bool setupATIVertexAttribArrayObject(const char *glext)
{
	H_AUTO_OGL(setupATIVertexAttribArrayObject);
	CHECK_EXT("GL_ATI_vertex_attrib_array_object");

	CHECK_ADDRESS(NEL_PFNGLVERTEXATTRIBARRAYOBJECTATIPROC, glVertexAttribArrayObjectATI);
	CHECK_ADDRESS(NEL_PFNGLGETVERTEXATTRIBARRAYOBJECTFVATIPROC, glGetVertexAttribArrayObjectfvATI);
	CHECK_ADDRESS(NEL_PFNGLGETVERTEXATTRIBARRAYOBJECTIVATIPROC, glGetVertexAttribArrayObjectivATI);

	return true;
}

// *********************************
static bool	setupARBFragmentProgram(const char *glext)
{
	H_AUTO_OGL(setupARBFragmentProgram);
	CHECK_EXT("GL_ARB_fragment_program");

	CHECK_ADDRESS(NEL_PFNGLPROGRAMSTRINGARBPROC, glProgramStringARB);
	CHECK_ADDRESS(NEL_PFNGLBINDPROGRAMARBPROC, glBindProgramARB);
	CHECK_ADDRESS(NEL_PFNGLDELETEPROGRAMSARBPROC, glDeleteProgramsARB);
	CHECK_ADDRESS(NEL_PFNGLGENPROGRAMSARBPROC, glGenProgramsARB);
	CHECK_ADDRESS(NEL_PFNGLPROGRAMENVPARAMETER4DARBPROC, glProgramEnvParameter4dARB);
	CHECK_ADDRESS(NEL_PFNGLPROGRAMENVPARAMETER4DVARBPROC, glProgramEnvParameter4dvARB);
	CHECK_ADDRESS(NEL_PFNGLPROGRAMENVPARAMETER4FARBPROC, glProgramEnvParameter4fARB);
	CHECK_ADDRESS(NEL_PFNGLPROGRAMENVPARAMETER4FVARBPROC, glProgramEnvParameter4fvARB);
	CHECK_ADDRESS(NEL_PFNGLPROGRAMLOCALPARAMETER4DARBPROC, glProgramLocalParameter4dARB);
	CHECK_ADDRESS(NEL_PFNGLPROGRAMLOCALPARAMETER4DVARBPROC, glProgramLocalParameter4dvARB);
	CHECK_ADDRESS(NEL_PFNGLPROGRAMLOCALPARAMETER4FARBPROC, glProgramLocalParameter4fARB);
	CHECK_ADDRESS(NEL_PFNGLPROGRAMLOCALPARAMETER4FVARBPROC, glProgramLocalParameter4fvARB);
	CHECK_ADDRESS(NEL_PFNGLGETPROGRAMENVPARAMETERDVARBPROC, glGetProgramEnvParameterdvARB);
	CHECK_ADDRESS(NEL_PFNGLGETPROGRAMENVPARAMETERFVARBPROC, glGetProgramEnvParameterfvARB);
	CHECK_ADDRESS(NEL_PFNGLGETPROGRAMLOCALPARAMETERDVARBPROC, glGetProgramLocalParameterdvARB);
	CHECK_ADDRESS(NEL_PFNGLGETPROGRAMLOCALPARAMETERFVARBPROC, glGetProgramLocalParameterfvARB);
	CHECK_ADDRESS(NEL_PFNGLGETPROGRAMIVARBPROC, glGetProgramivARB);
	CHECK_ADDRESS(NEL_PFNGLGETPROGRAMSTRINGARBPROC, glGetProgramStringARB);
	CHECK_ADDRESS(NEL_PFNGLISPROGRAMARBPROC, glIsProgramARB);

	return true;
}

// ***************************************************************************
static bool	setupARBVertexBufferObject(const char	*glext)
{
	H_AUTO_OGL(setupARBVertexBufferObject);
	CHECK_EXT("GL_ARB_vertex_buffer_object");

	CHECK_ADDRESS(PFNGLBINDBUFFERARBPROC, glBindBufferARB);
	CHECK_ADDRESS(PFNGLDELETEBUFFERSARBPROC, glDeleteBuffersARB);
	CHECK_ADDRESS(PFNGLGENBUFFERSARBPROC, glGenBuffersARB);
	CHECK_ADDRESS(PFNGLISBUFFERARBPROC, glIsBufferARB);
	CHECK_ADDRESS(PFNGLBUFFERDATAARBPROC, glBufferDataARB);
	CHECK_ADDRESS(PFNGLBUFFERSUBDATAARBPROC, glBufferSubDataARB);
	CHECK_ADDRESS(PFNGLGETBUFFERSUBDATAARBPROC, glGetBufferSubDataARB);
	CHECK_ADDRESS(PFNGLMAPBUFFERARBPROC, glMapBufferARB);
	CHECK_ADDRESS(PFNGLUNMAPBUFFERARBPROC, glUnmapBufferARB);
	CHECK_ADDRESS(PFNGLGETBUFFERPARAMETERIVARBPROC, glGetBufferParameterivARB);
	CHECK_ADDRESS(PFNGLGETBUFFERPOINTERVARBPROC, glGetBufferPointervARB);

	return true;
}

// ***************************************************************************
static bool	setupARBVertexProgram(const char	*glext)
{
	H_AUTO_OGL(setupARBVertexProgram);
	CHECK_EXT("GL_ARB_vertex_program");

	CHECK_ADDRESS(PFNGLVERTEXATTRIB1SARBPROC, glVertexAttrib1sARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB1FARBPROC, glVertexAttrib1fARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB1DARBPROC, glVertexAttrib1dARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB2SARBPROC, glVertexAttrib2sARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB2FARBPROC, glVertexAttrib2fARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB2DARBPROC, glVertexAttrib2dARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB3SARBPROC, glVertexAttrib3sARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB3FARBPROC, glVertexAttrib3fARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB3DARBPROC, glVertexAttrib3dARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB4SARBPROC, glVertexAttrib4sARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB4FARBPROC, glVertexAttrib4fARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB4DARBPROC, glVertexAttrib4dARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB4NUBARBPROC, glVertexAttrib4NubARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB1SVARBPROC, glVertexAttrib1svARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB1FVARBPROC, glVertexAttrib1fvARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB1DVARBPROC, glVertexAttrib1dvARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB2SVARBPROC, glVertexAttrib2svARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB2FVARBPROC, glVertexAttrib2fvARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB2DVARBPROC, glVertexAttrib2dvARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB3SVARBPROC, glVertexAttrib3svARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB3FVARBPROC, glVertexAttrib3fvARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB3DVARBPROC, glVertexAttrib3dvARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB4BVARBPROC, glVertexAttrib4bvARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB4SVARBPROC, glVertexAttrib4svARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB4IVARBPROC, glVertexAttrib4ivARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB4UBVARBPROC, glVertexAttrib4ubvARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB4USVARBPROC, glVertexAttrib4usvARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB4UIVARBPROC, glVertexAttrib4uivARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB4FVARBPROC, glVertexAttrib4fvARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB4DVARBPROC, glVertexAttrib4dvARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB4NBVARBPROC, glVertexAttrib4NbvARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB4NSVARBPROC, glVertexAttrib4NsvARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB4NIVARBPROC, glVertexAttrib4NivARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB4NUBVARBPROC, glVertexAttrib4NubvARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB4NUSVARBPROC, glVertexAttrib4NusvARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIB4NUIVARBPROC, glVertexAttrib4NuivARB);
	CHECK_ADDRESS(PFNGLVERTEXATTRIBPOINTERARBPROC, glVertexAttribPointerARB);
	CHECK_ADDRESS(PFNGLENABLEVERTEXATTRIBARRAYARBPROC, glEnableVertexAttribArrayARB);
	CHECK_ADDRESS(PFNGLDISABLEVERTEXATTRIBARRAYARBPROC, glDisableVertexAttribArrayARB);
	CHECK_ADDRESS(PFNGLPROGRAMSTRINGARBPROC, glProgramStringARB);
	CHECK_ADDRESS(PFNGLBINDPROGRAMARBPROC, glBindProgramARB);
	CHECK_ADDRESS(PFNGLDELETEPROGRAMSARBPROC, glDeleteProgramsARB);
	CHECK_ADDRESS(PFNGLGENPROGRAMSARBPROC, glGenProgramsARB);
	CHECK_ADDRESS(PFNGLPROGRAMENVPARAMETER4FARBPROC, glProgramEnvParameter4fARB);
	CHECK_ADDRESS(PFNGLPROGRAMENVPARAMETER4DARBPROC, glProgramEnvParameter4dARB);
	CHECK_ADDRESS(PFNGLPROGRAMENVPARAMETER4FVARBPROC, glProgramEnvParameter4fvARB);
	CHECK_ADDRESS(PFNGLPROGRAMENVPARAMETER4DVARBPROC, glProgramEnvParameter4dvARB);
	CHECK_ADDRESS(PFNGLPROGRAMLOCALPARAMETER4FARBPROC, glProgramLocalParameter4fARB);
	CHECK_ADDRESS(PFNGLPROGRAMLOCALPARAMETER4DARBPROC, glProgramLocalParameter4dARB);
	CHECK_ADDRESS(PFNGLPROGRAMLOCALPARAMETER4FVARBPROC, glProgramLocalParameter4fvARB);
	CHECK_ADDRESS(PFNGLPROGRAMLOCALPARAMETER4DVARBPROC, glProgramLocalParameter4dvARB);
	CHECK_ADDRESS(PFNGLGETPROGRAMENVPARAMETERFVARBPROC, glGetProgramEnvParameterfvARB);
	CHECK_ADDRESS(PFNGLGETPROGRAMENVPARAMETERDVARBPROC, glGetProgramEnvParameterdvARB);
	CHECK_ADDRESS(PFNGLGETPROGRAMLOCALPARAMETERFVARBPROC, glGetProgramLocalParameterfvARB);
	CHECK_ADDRESS(PFNGLGETPROGRAMLOCALPARAMETERDVARBPROC, glGetProgramLocalParameterdvARB);
	CHECK_ADDRESS(PFNGLGETPROGRAMIVARBPROC, glGetProgramivARB);
	CHECK_ADDRESS(PFNGLGETPROGRAMSTRINGARBPROC, glGetProgramStringARB);
	CHECK_ADDRESS(PFNGLGETVERTEXATTRIBDVARBPROC, glGetVertexAttribdvARB);
	CHECK_ADDRESS(PFNGLGETVERTEXATTRIBFVARBPROC, glGetVertexAttribfvARB);
	CHECK_ADDRESS(PFNGLGETVERTEXATTRIBIVARBPROC, glGetVertexAttribivARB);
	CHECK_ADDRESS(PFNGLGETVERTEXATTRIBPOINTERVARBPROC, glGetVertexAttribPointervARB);
	CHECK_ADDRESS(PFNGLISPROGRAMARBPROC, glIsProgramARB);

	return true;
}

// ***************************************************************************
static bool	setupNVOcclusionQuery(const char	*glext)
{
	H_AUTO_OGL(setupNVOcclusionQuery);
	CHECK_EXT("GL_NV_occlusion_query");

	CHECK_ADDRESS(NEL_PFNGLGENOCCLUSIONQUERIESNVPROC, glGenOcclusionQueriesNV);
	CHECK_ADDRESS(NEL_PFNGLDELETEOCCLUSIONQUERIESNVPROC, glDeleteOcclusionQueriesNV);
	CHECK_ADDRESS(NEL_PFNGLISOCCLUSIONQUERYNVPROC, glIsOcclusionQueryNV);
	CHECK_ADDRESS(NEL_PFNGLBEGINOCCLUSIONQUERYNVPROC, glBeginOcclusionQueryNV);
	CHECK_ADDRESS(NEL_PFNGLENDOCCLUSIONQUERYNVPROC, glEndOcclusionQueryNV);
	CHECK_ADDRESS(NEL_PFNGLGETOCCLUSIONQUERYIVNVPROC, glGetOcclusionQueryivNV);
	CHECK_ADDRESS(NEL_PFNGLGETOCCLUSIONQUERYUIVNVPROC, glGetOcclusionQueryuivNV);

	return true;
}


// ***************************************************************************
static bool	setupNVTextureRectangle(const char	*glext)
{
	H_AUTO_OGL(setupNVTextureRectangle);
	CHECK_EXT("GL_NV_texture_rectangle");
	return true;
}

// ***************************************************************************
static bool	setupFrameBufferObject(const char	*glext)
{
	H_AUTO_OGL(setupFrameBufferObject);
	CHECK_EXT("GL_EXT_framebuffer_object");

	CHECK_ADDRESS(NEL_PFNGLISRENDERBUFFEREXTPROC, glIsRenderbufferEXT);
	CHECK_ADDRESS(NEL_PFNGLISFRAMEBUFFEREXTPROC, glIsFramebufferEXT);
	CHECK_ADDRESS(NEL_PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC, glCheckFramebufferStatusEXT);
	CHECK_ADDRESS(NEL_PFNGLGENFRAMEBUFFERSEXTPROC, glGenFramebuffersEXT);
	CHECK_ADDRESS(NEL_PFNGLBINDFRAMEBUFFEREXTPROC, glBindFramebufferEXT);
	CHECK_ADDRESS(NEL_PFNGLFRAMEBUFFERTEXTURE2DEXTPROC, glFramebufferTexture2DEXT);
	CHECK_ADDRESS(NEL_PFNGLGENRENDERBUFFERSEXTPROC, glGenRenderbuffersEXT);
	CHECK_ADDRESS(NEL_PFNGLBINDRENDERBUFFEREXTPROC, glBindRenderbufferEXT);
	CHECK_ADDRESS(NEL_PFNGLRENDERBUFFERSTORAGEEXTPROC, glRenderbufferStorageEXT);
	CHECK_ADDRESS(NEL_PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC, glFramebufferRenderbufferEXT);
	CHECK_ADDRESS(NEL_PFNGLDELETERENDERBUFFERSEXTPROC, glDeleteRenderbuffersEXT);
	CHECK_ADDRESS(NEL_PFNGLDELETEFRAMEBUFFERSEXTPROC, glDeleteFramebuffersEXT);

	return true;
}

// ***************************************************************************
static bool	setupPackedDepthStencil(const char	*glext)
{
	H_AUTO_OGL(setupPackedDepthStencil);
	CHECK_EXT("GL_EXT_packed_depth_stencil");
	return true;
}

// ***************************************************************************
// Extension Check.
void	registerGlExtensions(CGlExtensions &ext)
{
	H_AUTO_OGL(registerGlExtensions);
	// OpenGL 1.2 ??
	const char	*nglVersion= (const char *)glGetString (GL_VERSION);
	sint	a=0, b=0;
	// 1.2***  ???
	sscanf(nglVersion, "%d.%d", &a, &b);
	ext.Version1_2= (a==1 && b>=2) || (a>=2);

	// Extensions.
	const char	*glext= (const char*)glGetString(GL_EXTENSIONS);
	GLint	ntext;

	nldebug("3D: Available OpenGL Extensions:");

	if (DebugLog)
	{
		vector<string> exts;
		explode(string(glext), string(" "), exts);
		for(uint i = 0; i < exts.size(); i++)
		{
			if(i%5==0) DebugLog->displayRaw("3D:     ");
			DebugLog->displayRaw(string(exts[i]+" ").c_str());
			if(i%5==4) DebugLog->displayRaw("\n");
		}
		DebugLog->displayRaw("\n");
	}

	// Check ARBMultiTexture
	ext.ARBMultiTexture= setupARBMultiTexture(glext);
	if(ext.ARBMultiTexture)
	{
		glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &ntext);
		// We could have more than IDRV_MAT_MAXTEXTURES but the interface only
		// support IDRV_MAT_MAXTEXTURES texture stages so take min
		ext.NbTextureStages= (ntext<((GLint)IDRV_MAT_MAXTEXTURES)?ntext:IDRV_MAT_MAXTEXTURES);
	}

	// Check EXTTextureEnvCombine
	ext.EXTTextureEnvCombine= setupEXTTextureEnvCombine(glext);

	// Check ARBTextureCompression
	ext.ARBTextureCompression= setupARBTextureCompression(glext);

	// Check ARBTextureNonPowerOfTwo
	ext.ARBTextureNonPowerOfTwo= setupARBTextureNonPowerOfTwo(glext);

	// Check NVVertexArrayRange
	// Disable feature ???
	if(!ext.DisableHardwareVertexArrayAGP)
		ext.NVVertexArrayRange= setupNVVertexArrayRange(glext);
	if(ext.NVVertexArrayRange)
	{
		GLint	nverts;
		glGetIntegerv((GLenum)GL_MAX_VERTEX_ARRAY_RANGE_ELEMENT_NV, &nverts);
		ext.NVVertexArrayRangeMaxVertex= nverts;
	}


	// Compression S3TC OK iff ARBTextureCompression.
	ext.EXTTextureCompressionS3TC= (ext.ARBTextureCompression && setupEXTTextureCompressionS3TC(glext));

	// Check if NVidia GL_EXT_vertex_weighting is available.
	ext.EXTVertexWeighting= setupEXTVertexWeighting(glext);

	// Check EXTSeparateSpecularColor.
	ext.EXTSeparateSpecularColor= setupEXTSeparateSpecularColor(glext);

	// Check NVTextureEnvCombine4.
	ext.NVTextureEnvCombine4= setupNVTextureEnvCombine4(glext);


	// Check for cube mapping
	ext.ARBTextureCubeMap = setupARBTextureCubeMap(glext);

	// Check vertex program
	// Disable feature ???
	if(!ext.DisableHardwareVertexProgram)
	{
		ext.NVVertexProgram = setupNVVertexProgram(glext);
		ext.EXTVertexShader = setupEXTVertexShader(glext);
		ext.ARBVertexProgram= setupARBVertexProgram(glext);
	}
	else
	{
		ext.NVVertexProgram = false;
		ext.EXTVertexShader = false;
		ext.ARBVertexProgram = false;
	}

	// Check texture shaders
	// Disable feature ???
	if(!ext.DisableHardwareTextureShader)
	{
		ext.NVTextureShader = setupNVTextureShader(glext);
		ext.ATIEnvMapBumpMap = setupATIEnvMapBumpMap(glext);
		ext.ATIFragmentShader = setupATIFragmentShader(glext);
		ext.ARBFragmentProgram = setupARBFragmentProgram(glext);
	}
	else
	{
		ext.ATIEnvMapBumpMap = false;
		ext.NVTextureShader = false;
		ext.ATIFragmentShader = false;
		ext.ARBFragmentProgram = false;
	}



	// For now, the only way to know if emulation, is to test some extension which exist only on GeForce3.
	// if GL_NV_texture_shader is not here, then we are not on GeForce3.
	ext.NVVertexProgramEmulated= ext.NVVertexProgram && (strstr(glext, "GL_NV_texture_shader")==NULL);

	// Check EXTSecondaryColor
	ext.EXTSecondaryColor= setupEXTSecondaryColor(glext);

	// Check EXTBlendColor
	ext.EXTBlendColor= setupEXTBlendColor(glext);

	// Check NVVertexArrayRange2
	ext.NVVertexArrayRange2= setupNVVertexArrayRange2(glext);
	// if supported
	if(ext.NVVertexArrayRange2)
		// VBHard swap without flush of the VAR.
		ext.NVStateVARWithoutFlush= GL_VERTEX_ARRAY_RANGE_WITHOUT_FLUSH_NV;
	else
		// VBHard with unuseful flush of the VAR.
		ext.NVStateVARWithoutFlush= GL_VERTEX_ARRAY_RANGE_NV;

	// Check NV_occlusion_query
	ext.NVOcclusionQuery = setupNVOcclusionQuery(glext);

	// Check GL_NV_texture_rectangle
	ext.NVTextureRectangle = setupNVTextureRectangle(glext);

	// Check GL_EXT_framebuffer_object
	ext.FrameBufferObject = setupFrameBufferObject(glext);

	// Check GL_EXT_packed_depth_stencil
	ext.PackedDepthStencil = setupPackedDepthStencil(glext);

	// ATI extensions
	// -------------

	// Check ATIVertexArrayObject
	// Disable feature ???
	if(!ext.DisableHardwareVertexArrayAGP)
	{
		ext.ATIVertexArrayObject= setupATIVertexArrayObject(glext);
		ext.ATIMapObjectBuffer= setupATIMapObjectBuffer(glext);
		ext.ATIVertexAttribArrayObject = setupATIVertexAttribArrayObject(glext);
	}
	// Check ATIXTextureEnvCombine3.
	ext.ATITextureEnvCombine3= setupATITextureEnvCombine3(glext);
	// Check ATIXTextureEnvRoute
	ext.ATIXTextureEnvRoute= setupATIXTextureEnvRoute(glext);

	if (ext.ATITextureEnvCombine3)
	{
		ext.IsATI9500OrAbove = setupARBFragmentProgram(glext);
	}

	// ARB extensions
	// -------------
	if(!ext.DisableHardwareVertexArrayAGP)
	{
		ext.ARBVertexBufferObject = setupARBVertexBufferObject(glext);
	}
	// In my tries ATI_fragment_shader doesn't like to be used With ARB_fragment_program (maybe a driver bug, display become corrupted)
	if (ext.IsATI9500OrAbove)
	{
		ext.ATIFragmentShader = false;
	}

	ext.IsGeforceFXOrAbove = setupNVVertexProgram(glext) && setupARBFragmentProgram(glext);

	// fix for radeon 7200 -> disable agp
	if (ext.NbTextureStages == 3 && (ext.ATIVertexArrayObject || ext.ARBVertexBufferObject))
	{
		ext.ATIVertexArrayObject = false;
		ext.ARBVertexBufferObject = false;
		ext.ATIMapObjectBuffer = false;
		ext.ATIVertexAttribArrayObject = false;
	}
}


// *********************************
static bool	setupWGLEXTSwapControl(const char	*glext)
{
	H_AUTO_OGL(setupWGLEXTSwapControl);
	CHECK_EXT("WGL_EXT_swap_control");

#ifdef NL_OS_WINDOWS
	CHECK_ADDRESS(PFNWGLSWAPINTERVALEXTPROC, wglSwapIntervalEXT);
	CHECK_ADDRESS(PFNWGLGETSWAPINTERVALEXTPROC, wglGetSwapIntervalEXT);
#endif

	return true;
}

#ifdef NL_OS_WINDOWS
// ***************************************************************************
bool	registerWGlExtensions(CGlExtensions &ext, HDC hDC)
{
	H_AUTO_OGL(registerWGlExtensions);
	// Get proc address
	CHECK_ADDRESS(PFNWGFGETEXTENSIONSSTRINGARB, wglGetExtensionsStringARB);

	// Get extension string
	const char *glext = nwglGetExtensionsStringARB (hDC);
	if (glext == NULL)
	{
		nlwarning ("nwglGetExtensionsStringARB failed");
		return false;
	}

	nldebug("3D: Available WGL Extensions:");

	if (DebugLog)
	{
		vector<string> exts;
		explode(string(glext), string(" "), exts);
		for(uint i = 0; i < exts.size(); i++)
		{
			if(i%5==0) DebugLog->displayRaw("3D:     ");
			DebugLog->displayRaw(string(exts[i]+" ").c_str());
			if(i%5==4) DebugLog->displayRaw("\n");
		}
		DebugLog->displayRaw("\n");
	}

	// Check for pbuffer
	ext.WGLARBPBuffer= setupWGLARBPBuffer(glext);

	// Check for pixel format
	ext.WGLARBPixelFormat= setupWGLARBPixelFormat(glext);

	// Check for swap control
	ext.WGLEXTSwapControl= setupWGLEXTSwapControl(glext);

	return true;
}
#endif // NL_OS_WINDOWS

}