func GenTextures(n int32, textures *uint32) {
	syscall.Syscall(gpGenTextures, 2, uintptr(n), uintptr(unsafe.Pointer(textures)), 0)
}
func GenTextures(n int32, textures *uint32) {
	syscall.Syscall(gpGenTextures, 2, uintptr(n), uintptr(unsafe.Pointer(textures)), 0)
}
func GenTextures ( n int32 , textures * uint32 ) { syscall . Syscall ( gpGenTextures , 2 , uintptr ( n ) , uintptr ( unsafe . Pointer ( textures ) ) , 0 ) }
// generate texture names
generate texture names