func BlendFuncSeparate(sfactorRGB uint32, dfactorRGB uint32, sfactorAlpha uint32, dfactorAlpha uint32) {
	syscall.Syscall6(gpBlendFuncSeparate, 4, uintptr(sfactorRGB), uintptr(dfactorRGB), uintptr(sfactorAlpha), uintptr(dfactorAlpha), 0, 0)
}
func BlendFuncSeparate(sfactorRGB uint32, dfactorRGB uint32, sfactorAlpha uint32, dfactorAlpha uint32) {
	syscall.Syscall6(gpBlendFuncSeparate, 4, uintptr(sfactorRGB), uintptr(dfactorRGB), uintptr(sfactorAlpha), uintptr(dfactorAlpha), 0, 0)
}
func BlendFuncSeparate ( sfactorRGB uint32 , dfactorRGB uint32 , sfactorAlpha uint32 , dfactorAlpha uint32 ) { syscall . Syscall6 ( gpBlendFuncSeparate , 4 , uintptr ( sfactorRGB ) , uintptr ( dfactorRGB ) , uintptr ( sfactorAlpha ) , uintptr ( dfactorAlpha ) , 0 , 0 ) }
// specify pixel arithmetic for RGB and alpha components separately
specify pixel arithmetic for RGB and alpha components separately