发明授权
US5969726A Caching and coherency control of multiple geometry accelerators in a
computer graphics system
失效
计算机图形系统中多个几何加速器的缓存和一致性控制
- 专利标题: Caching and coherency control of multiple geometry accelerators in a computer graphics system
- 专利标题(中): 计算机图形系统中多个几何加速器的缓存和一致性控制
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申请号: US866909申请日: 1997-05-30
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公开(公告)号: US5969726A公开(公告)日: 1999-10-19
- 发明人: Eric M. Rentschler , Alan S. Krech, Jr.
- 申请人: Eric M. Rentschler , Alan S. Krech, Jr.
- 申请人地址: CA Palo Alto
- 专利权人: Hewlett-Packard Co.
- 当前专利权人: Hewlett-Packard Co.
- 当前专利权人地址: CA Palo Alto
- 主分类号: G06T15/00
- IPC分类号: G06T15/00 ; G06T1/20
摘要:
A computer graphics system for rendering graphics primitives based upon primitive data received from a host computer through a graphics interface includes a plurality of geometry accelerators. A distributor divides the primitive data into chunks of primitive data and distributes the chunks to a current geometry accelerator recipient. A state controller is configured to store and resend selected primitive data to the geometry accelerators based upon whether one or more vertices of a graphics primitive are contained in more than one of the chunks of primitive data. Advantageously, this enables the computer graphics system to efficiently process primitive data while avoiding providing the geometry accelerators with an excessive amount of data than necessary for them to render the primitives. Specifically, the state controller includes in the selected primitive data vertex states which were sent to a previous current geometry accelerator recipient and which are required by the current geometry accelerator recipient to assemble at least a portion of the graphics primitive. In addition, the state controller resends the property states to the current geometry accelerator recipient when the currently-stored local state in the current geometry accelerator recipient is not the same as a currently-effective local state. Furthermore, when the resent vertex states include a first and second resent vertex state, the selected primitive data includes property states which changed from when the first vertex state was sent to the previous current geometry accelerator and the second vertex state was sent to the previous current geometry accelerator.
公开/授权文献
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信息查询
IPC分类:
G | 物理 |
G06 | 计算;推算或计数 |
G06T | 一般的图像数据处理或产生 |
G06T15/00 | 3D〔三维〕图像的加工 |