Blending with planar maps
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United States of America Patent
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-
Apr 11, 2000
Grant Date -
N/A
app pub date -
Dec 22, 1997
filing date -
Dec 22, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A system for blending graphical objects using planar map representations is described. A page description representation of an input document's graphical objects is converted, at least in part, into a planar map representation. A color is assigned to each region in the planar map as a function of the region's associated paths' transparency characteristics. In one embodiment, if the graphical processing system exhausts its memory during processing, those paths already converted to planar maps are rasterized. Any subsequent processing of graphical objects is thereafter performed in raster format. In another embodiment, an output page is divided into tiles where each tile may be rasterized independent of the other tiles. In yet another embodiment, graphical objects are processed in reverse order compared to their arrangement in the page description language representation.
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Cited Art Landscape
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