| 摘要 |
<p>A novel apparatus and method is disclosed to optimize and reduce the amount of memory required for processing of anti-aliased graphics images while preserving the quality of the displayed image. An approximation buffer is used to store the subpixel color information and the memory reduction is achieved by reducing the number of bits used to store subpixel color information. An input scaler apparatus scales the input pixel color value to a range represented by the reduced number of bits used to store subpixel color information. Approximation computation apparatus computes the approximated subpixel color values and writes them to the subpixel storage locations in the approximation buffer. Approximation buffer stores subpixel color values using a reduced number of bits than prior art techniques. Pixel color computation apparatus retrieves subpixel values from the approximation buffer and averages them to determine the pixel color value. Finally, output scaler apparatus reverses the scaling effect introduced by the input scaler apparatus. The computed pixel value is stored in the frame buffer by the graphics chip and then displayed on a CRT display device.</p> |
