// define optional gl functions // this file gets included multiple times, with different // definitions for GL_FUNC GL_FUNC (PFNGLBLENDFUNCSEPARATEPROC, BlendFuncSeparate) GL_FUNC (PFNGLBLENDFUNCSEPARATEEXTPROC, BlendFuncSeparateEXT) GL_FUNC (PFNGLCONVOLUTIONPARAMETERFEXTPROC, ConvolutionParameterf) GL_FUNC (PFNGLCONVOLUTIONFILTER2DEXTPROC, ConvolutionFilter2D) GL_FUNC (PFNGLSEPARABLEFILTER2DEXTPROC, SeparableFilter2D) GL_FUNC (PFNGLMULTITEXCOORD2FARBPROC, MultiTexCoord2f) GL_FUNC (PFNGLACTIVETEXTUREARBPROC, ActiveTexture) GL_FUNC (PFNGLMULTITEXCOORD2FARBPROC, MultiTexCoord2fARB) GL_FUNC (PFNGLACTIVETEXTUREARBPROC, ActiveTextureARB)