func ReadPixels(x int32, y int32, width int32, height int32, format uint32, xtype uint32, pixels unsafe.Pointer) {
	syscall.Syscall9(gpReadPixels, 7, uintptr(x), uintptr(y), uintptr(width), uintptr(height), uintptr(format), uintptr(xtype), uintptr(pixels), 0, 0)
}
func ReadPixels(x int32, y int32, width int32, height int32, format uint32, xtype uint32, pixels unsafe.Pointer) {
	syscall.Syscall9(gpReadPixels, 7, uintptr(x), uintptr(y), uintptr(width), uintptr(height), uintptr(format), uintptr(xtype), uintptr(pixels), 0, 0)
}
func ReadPixels ( x int32 , y int32 , width int32 , height int32 , format uint32 , xtype uint32 , pixels unsafe . Pointer ) { syscall . Syscall9 ( gpReadPixels , 7 , uintptr ( x ) , uintptr ( y ) , uintptr ( width ) , uintptr ( height ) , uintptr ( format ) , uintptr ( xtype ) , uintptr ( pixels ) , 0 , 0 ) }
// read a block of pixels from the frame buffer
read a block of pixels from the frame buffer