code: func Bitmap(width int32, height int32, xorig float32, yorig float32, xmove float32, ymove float32, bitmap *uint8) {
  	syscall.Syscall9(gpBitmap, 7, uintptr(width), uintptr(height), uintptr(math.Float32bits(xorig)), uintptr(math.Float32bits(yorig)), uintptr(math.Float32bits(xmove)), uintptr(math.Float32bits(ymove)), uintptr(unsafe.Pointer(bitmap)), 0, 0)
  }
docs: // draw a bitmap