code: func Bitmap(width int32, height int32, xorig float32, yorig float32, xmove float32, ymove float32, bitmap *uint8) {
  	C.glowBitmap(gpBitmap, (C.GLsizei)(width), (C.GLsizei)(height), (C.GLfloat)(xorig), (C.GLfloat)(yorig), (C.GLfloat)(xmove), (C.GLfloat)(ymove), (*C.GLubyte)(unsafe.Pointer(bitmap)))
  }
docs: // draw a bitmap