Prioritized overlay of foreground objects line buffer system for a video display system

摘要

A priority ordered multiple video object display system is disclosed for use with a raster scan display having a plurality of display locations on a plurality of display lines. The display system comprises means for generating a list of ordered video object data packets, and buffer means for storing the list of ordered data packets at locations spatially associated with respective display locations. Also included are means for varying the order in which the packets are written into the buffer means, and means for selectively suppressing zero overwrite for secondary writes to a single location in said buffer means during the construction of a common single display line stored within said buffer means. A method of presenting a video display is also disclosed.