发明名称 |
System for use in a computerized imaging system to efficiently transfer graphic information to a graphics subsystem employing masked span |
摘要 |
Graphics information is efficiently transferred from a host computer to a graphics subsystem in which rendering and pixel data is generated by the host system. A masked span operation provides an assist for 3D rendering performed by the system processor of the host and other system resources. Storage of depth, alpha, stencil, and other pixel data is in system memory including one or more ancillary graphics buffers. The main processor of the host system generates pixel data associated with an image. This data is checked against the buffers. As a result of such checking, a mask is generated by the host system. The mask is transferred in burst mode across the host-graphic subsystem PCI bus to the graphics subsystem in combination with span width, and in the case of interpolated color, color base and color increment data, and X,Y coordinate of the first pixel. In the graphics subsystem the mask is employed with the other data to load the frame buffer with the portion of pixel data defined by the mask. <IMAGE> |
申请公布号 |
EP0803797(A1) |
申请公布日期 |
1997.10.29 |
申请号 |
EP19970301950 |
申请日期 |
1997.03.21 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
BUI, THUY-LINH TRAN;JOHNS, CHARLES RAY;ROBERSON, JOHN THOMAS;SPANNAUS, JOHN FRED |
分类号 |
G06F5/00;G06F3/14;G06T11/00;G06T15/00 |
主分类号 |
G06F5/00 |
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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