Video graphics module capable of blending multiple image layers
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United States of America Patent
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Jan 27, 2009
Grant Date -
N/A
app pub date -
Jan 13, 2000
filing date -
Jan 13, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A video graphics module capable of blending multiple image layers includes a plurality of video graphic pipelines, each of which is operable to process a corresponding image layer. One of the video graphic pipelines processes a foremost image layer. For example, the foremost image layer may be a hardware cursor. The video graphics module also includes a blending module that is operably coupled to the plurality of video graphic pipelines. The blending module blends, in accordance with a blending convention (e.g., AND/Exclusive OR blending and/or alpha blending), the corresponding image layers of each pipeline in a predetermined blending order to produce an output image. The blending module blends the foremost image layer such that it appears in a foremost position with respect to the other image layers.
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