| 摘要 |
A method and apparatus for multipass rendering of graphics primitives is provided. The apparatus of the present invention includes a graphics pipeline organized as a sequence of tasks. A set of state information blocks are provided for each pipeline tasks. A host processors stores a set of graphics attributes for each task in the state information blocks. The host processor then sends a first token through the graphics pipeline. The first token causes each task to select the state information block that is associated with that task and the first rendering pass. The host processor then sends a group of graphics primitives through the graphics pipeline. Each tasks performs a graphics transformation on the graphics primitives using the graphics attributes stored in the state information block selected for that task. The host processor then sends a second token through the graphics pipeline. The second token causes each task to select the state information block that is associated with that task and the second rendering pass. The host processor then sends the same group of graphics primitives through the graphics pipeline. The process of using tokens to select state information blocks, followed by rendering graphics primitives is repeated until the multipass rendering process is complete.
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