func StencilOp(fail uint32, zfail uint32, zpass uint32) {
	C.glowStencilOp(gpStencilOp, (C.GLenum)(fail), (C.GLenum)(zfail), (C.GLenum)(zpass))
}
func StencilOp(fail uint32, zfail uint32, zpass uint32) {
	C.glowStencilOp(gpStencilOp, (C.GLenum)(fail), (C.GLenum)(zfail), (C.GLenum)(zpass))
}
func StencilOp ( fail uint32 , zfail uint32 , zpass uint32 ) { C . glowStencilOp ( gpStencilOp , ( C . GLenum ) ( fail ) , ( C . GLenum ) ( zfail ) , ( C . GLenum ) ( zpass ) ) }
// set front and back stencil test actions
set front and back stencil test actions