| 摘要 |
The present invention uses a display list where each swath is segmented into a plurality of zones (or tiles) and each zone is processed as a separate unit. Objects going into the display list are clipped to horizontal and vertical zone boundaries by a parser. The individual zones in the display list are ultimately rasterized by an image processor, and a number of rasterized zones are temporarily stored in bit-mapped buffers. Hence, it is now possible to mix 0, 1, and 3-plane (CMY) zones in a single swath, resulting in faster throughput because fewer pixels are rendered, rotated, copied and erased. The invention also results in lower memory requirements for both the display list memory and the bit-mapped memory.
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