1. A graphics processor for receiving and internally storing pixel data from an external display memory, the graphics processor comprising: an internal memory for temporarily storing pixel data internally in the graphics processor; a pixel data filler coupled to the internal memory for selectively storing the pixel data accessed from the external display memory, the pixel data filler including a first storage unit for storing pixel data for filling Y position data in the internal memory and a second storage unit for storing pixel data for filling X position data in the internal memory; and a lookup register disposed within the pixel data filler for storing size data representing the size of the internal memory.