Rasterizing stacked graphics objects from top to b

专利名称：Rasterizing stacked graphics objects from

top to bottom

发明人：John D. Morris,Daniel J. Clark申请号：US109798申请日：20041013

公开号：US20060077210A1公开日：20060413

专利附图：

摘要：Methods and apparatus, including computer program products, for rasterizingdigital graphics objects having a stacking order. One method includes rasterizing thegraphics objects by marking pixels in a pixel array, where each graphics object is

separately rasterized according to a processing sequence that follows the stacking orderfrom top to bottom; and, during the rasterization, tracking which pixels have beenmarked. Tracking which pixels have been marked can include using at least one trackinglist that is associated with a scan line defining a sequence of pixels in a pixel array and thatidentifies marked or unmarked segments in the scan line. Rasterizing the graphics objectscan include using the tracking list to identify markable pixels in the pixel array andmarking only those pixels that are markable according to the tracking list. Marking pixelscan include assigning any graphical attribute of a graphics object to the pixels.

申请人：John D. Morris,Daniel J. Clark

地址：Walnut Creek CA US,Los Gatos CA US

国籍：US,US

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