Method and apparatus for operating improved stencil shadow awl
A shadow and template technology, applied in 3D image processing, image data processing, instruments, etc., can solve problems such as waste of memory traffic
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[0067] Figure 5 It is a basic architecture diagram of an embodiment of the present invention. A computer graphics device 500 includes a graphics processor 510 and a memory 520 . The memory 520 can also be a system or main memory used in conjunction with the graphics processor 510 . Specific addresses in the memory 520 are used for the depth buffer 530, and the stencil buffer 540. The depth buffer 530 and stencil buffer 540 data structures can also be combined into a single buffer 550. For example, the data record is 32 bits, of which 24 bits are the depth value and 8 bits are the template value. The single buffer 550 stores a record for each pixel.
[0068] There is another specific address in the memory 520 as a compressed depth buffer ZL1 560 for storing the depth data (Z-data) 562 of a group of pixels. The set of pixels can be a tile, a sub-tile or multiple tiles. In addition, the memory 520 includes a compressed stencil buffer SL1 570 for storing stencil values 57...
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