发明名称 |
Method and apparatus for graphics display data manipulation |
摘要 |
<p>Special purpose graphics instructions are provided to facilitate hidden surface elimination. A Z-buffer check instruction performs multiple, simultaneous unsigned-integer (ordinal) comparisons of newly computed distance (Z) values with the contents of a Z-buffer. Distances of points to be drawn are compared with corresponding values in the Z-buffer, and appropriate bits of a pixel mask are then set to designate those pixels for which the points to be drawn are closer (smaller) than the Z-buffer values. Previously calculated bits of the pixel mask are shifted so that consecutive Z-buffer check instructions accumulate their results in the pixel mask register. A pixel store instruction utilizes the pixel mask to update only those pixel locations in a frame buffer which correspond to a point on a newly rendered surface closer than the surface represented by the current pixel value.</p> |
申请公布号 |
GB2228652(B) |
申请公布日期 |
1993.10.13 |
申请号 |
GB19890028135 |
申请日期 |
1989.12.13 |
申请人 |
* INTEL CORPORATION;* INTEL CORPORATION |
发明人 |
LESLIE DEAN * KOHN |
分类号 |
G06T15/40;G06T15/87;G09B9/30;(IPC1-7):G06F15/72 |
主分类号 |
G06T15/40 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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