Apparatus and method for pipelined bubble squeezer
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United States of America Patent
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-
Mar 4, 2003
Grant Date -
N/A
app pub date -
Oct 25, 1999
filing date -
Oct 21, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
There are many validity tests, such as a depth test, used to determine which pixels are valid or invalid in a 3D computer graphic rendering process. It is not necessary to display the invalid pixels on the screen, because these pixels are hidden behind other objects or other windows. The invalid pixels will eventually be discarded in the rendering process later. Conventional designs pushed pixels into a frame buffer, no matter these pixels pass the validity tests or not. The present invention presents a pipelined bubble squeezer to separate pixels into a valid group and a invalid group. The pixels in the invalid group are not pushed into the frame buffer for achieving a better performance. The pipelined bubble squeezer behaves like many bubbles floating up to the top eventually through an interconnection network of cells.
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