Computer graphics processing and selective visual display system – Computer graphics processing – Three-dimension
Reexamination Certificate
2006-01-03
2006-01-03
Jankus, Almis R. (Department: 2672)
Computer graphics processing and selective visual display system
Computer graphics processing
Three-dimension
Reexamination Certificate
active
06982713
ABSTRACT:
A method and system for clearing depth and color buffers in a real time graphics rendering system10. The method and system are able to improve both depth and color buffer clearing. The method and system may utilize a frame flag, a depth clearing module, and a fast color and frame flag clearing module. The system assigns a frame flag to each pixel, which is used to determine whether the current Z value for the pixel is valid. The frame flag may be attached to Z value in the depth buffer. Instead of filling entire depth and color buffers with background values, the system only fills the holes that were not drawn in the previous frame. The fast color and frame flag clearing module traverses a rectangular area, tile by tile, where a tile is a block of pixels, to determine whether each pixel is background by checking the frame flags that are read from the depth buffer. If at least one pixel of a tile is background, the module updates those pixels' color with background color by sending requests to memory interface.
REFERENCES:
patent: 5748864 (1998-05-01), Martin
patent: 5923333 (1999-07-01), Stroyan
patent: 6285779 (2001-09-01), Lapidous et al.
patent: 2001/0028354 (2001-10-01), Cheng et al.
patent: 2002/0171654 (2002-11-01), Selig et al.
patent: 2003/0090486 (2003-05-01), Ashburn et al.
patent: 2003/0160788 (2003-08-01), Buehler
patent: 2003/0201994 (2003-10-01), Taylor et al.
Xie, Feng, et al., “Adaptive Hierarchical Visibility in A Tiled Architecture”, 1999, pp. 75-84, 142, ACM Press.
Greene, Ned, “Occlusion Curlling With Optimized Hierarchical Z-Buffering”, NVIDIA, 1999, pp. H-21-H31.
Morein, Steve, “ATI Radeon HyperZ Technology”, 2000, Eviographics Siggraph Workshop Program and Presentations, Slides.
Greene, Ned, et al., “Hierarchical Z-Buffer Visibility”, In Proceedings of Siggraph, 1993, pp. 231-238.
Jiao Guofang
Shao Pingping
Yu Chun
Zhang Jianbo
Zhang Linglan
Baxley Charles E.
Hadidi Jon
Jankus Almis R.
XGI Technology Inc.
LandOfFree
System and method for clearing depth and color buffers in a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for clearing depth and color buffers in a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for clearing depth and color buffers in a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3564016