Efficient implementation of raster operations flow
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United States of America Patent
Stats
-
Feb 12, 2013
Grant Date -
Dec 21, 2006
app pub date -
Aug 28, 2006
filing date -
May 13, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
According to one aspect, a printer supports transparency operations by generating mask data at interpretation stage which indicates whether each bit of a page content would be determined by the result of a raster operation or a prior destination value. The mask data can be used to complete quickly rendering of a page image once the rendering starts. Another aspect enables color fills of objects to be performed efficiently. A raster operations engine may determine whether all the points (pixels) of the object would have the same value if the raster operation is performed. If all pixels would have the same value, the value for only one pixel is computed and used for multiple pixels of the object. According to another aspect, when a pattern is to be tiled on an entire image portion, the pattern data is stored in a memory and provided as an input to rendering operation multiple times.
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Cited Art Landscape
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