Cull streams for fine-grained rendering predication
First Claim
1. A computer-implemented method for fine-grained rendering predication, the method comprising:
- receiving a batch of triangles associated with a graphics object;
processing the batch of triangles to determine only position information in a modified graphics rendering pipeline;
determining, based on the position information, if the batch of triangles is to be culled; and
writing a bit into a bitstream residing in a memory indicating whether the batch of triangles is to be culled.
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Abstract
One embodiment of the present invention sets forth a technique to perform fine-grained rendering predication using an IGPU and a DGPU. A graphics driver divides a 3D object into batches of triangles. The IGPU processes each batch of triangles through a modified rendering pipeline to determine if the batch is culled. The IGPU writes bits into a bitstream corresponding to the visibility of the batches. The DGPU reads bits from the bitstream and performs full-blown rendering, including shading, but only on the batches of triangles whose bit indicates that the batch is visible. Advantageously, this approach to rendering predication provides fine-grained culling without adding unnecessary overhead, thereby optimizing both hardware resources and performance.
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Citations
20 Claims
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1. A computer-implemented method for fine-grained rendering predication, the method comprising:
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receiving a batch of triangles associated with a graphics object; processing the batch of triangles to determine only position information in a modified graphics rendering pipeline; determining, based on the position information, if the batch of triangles is to be culled; and writing a bit into a bitstream residing in a memory indicating whether the batch of triangles is to be culled. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system, comprising:
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an interface that receives a batch of triangles associated with a graphics object; and an integrated graphics processor configured to; process the batch of triangles to determine only position information; determine, based on the position information, if the batch of triangles is to be culled, and write a bit into a bitstream residing in a memory indicating whether the batch of triangles is to be culled. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification