glBlendFuncSeparate Interface to
OpenGL function glBlendFuncSeparate
usage: glBlendFuncSeparate( srcRGB, dstRGB, srcAlpha, dstAlpha )
C function: void glBlendFuncSeparate(GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha)
Psychtoolbox/PsychOpenGL/MOGL/wrap/glBlendFuncSeparate.m