SYSTEM AND METHOD FOR IMAGE GENERATION USING COMPRESSION

摘要

Non-real-time decompression of stored image data permits an unlimited amount of image data to be rendered with a limited amount of available memory. When the memory available to a display list (18) is filled with image data, it is rendered into a band buffer (44) and then compressed into a compressed band buffer (47), to free up the memory used by the original display list entries. Additional entries are then entered in the display list. After the remaining entries have been captured in the display list (18), the information stored in the compressed band buffers (47) is decompressed and stored in the uncompressed band buffer (44). The additional image data in the display list is then rendered, and combined with the previously rendered data in the uncompressed band buffer (44). After the rendering is completed, the contents of the uncompressed band buffer is again compressed into the compressed band buffer format. This procedure can be continually repeated until all of the image data has been rendered into respective bands, and the page of data is complete.