func StencilMaskSeparate(face uint32, mask uint32) {
	syscall.Syscall(gpStencilMaskSeparate, 2, uintptr(face), uintptr(mask), 0)
}
func StencilMaskSeparate(face uint32, mask uint32) {
	syscall.Syscall(gpStencilMaskSeparate, 2, uintptr(face), uintptr(mask), 0)
}
func StencilMaskSeparate ( face uint32 , mask uint32 ) { syscall . Syscall ( gpStencilMaskSeparate , 2 , uintptr ( face ) , uintptr ( mask ) , 0 ) }
// control the front and/or back writing of individual bits in the stencil planes
control the front and / or back writing of individual bits in the stencil planes