US 2023/0401778 A1 · REDUCING REDUNDANT RENDERING IN A GRAPHICS SYSTEM

Abstract

A method and system for performing a render using a graphics processing unit that implements a tile-based graphics pipeline where a rendering space is sub-divided into tiles. Primitives are received that were processed by a geometry processing stage of the graphics pipeline and these are grouped into one or more sets, and a primitive block generated from each set. Primitive block data is stored characterising the content of the one or more primitive blocks. It is determined which tile each of the primitives are located in, and for at least one selected tile a per-tile primitive block list is stored indicating which of the one or more primitive blocks contain primitives located in that tile. It is determined whether the output of a previous render for the selected tile(s) can be used as an output for the render based on the per-tile primitive block list and the primitive block data for the primitive blocks indicated therein, and corresponding data from the previous render.

Claims20

Dependent claims

A method of performing a render using a graphics processing unit configured to implement a tile-based graphics pipeline in which a rendering space is sub-divided into a plurality of tiles, the method comprising:

receiving a plurality of primitives processed by a geometry processing stage of the graphics pipeline;
grouping the primitives into one or more sets and generating a primitive block from each set to form one or more primitive blocks;
determining which of the primitives are located within each tile of the plurality of tiles;
storing primitive block data characterising the content of the one or more primitive blocks;
for at least one selected tile of the plurality of tiles, storing a per-tile primitive block list indicating which of the one or more primitive blocks contain primitives located within that tile;
and
for the at least one selected tile, determining whether the output of a previous render for that tile can be used as an output for the render based on the per-tile primitive block list and the primitive block data for the primitive blocks indicated therein, and corresponding data from the previous render.

4 more elements

A graphics processing system configured to implement a tile-based graphics pipeline in which a rendering space is sub-divided into a plurality of tiles, comprising:

a primitive block generator configured to:
receive a plurality of primitives processed by a geometry processing stage of the graphics pipeline,
group the primitives into one or more sets, and
generate a primitive block from each set to form one or more primitive blocks;
a tiling unit configured to determine which of the primitives are located within each tile of the plurality of tiles;
a data characterisation unit configured to:
store primitive block data characterising the content of the one or more primitive blocks, and
for at least one selected tile of the plurality of tiles, store a per-tile primitive block list indicating which of the one or more primitive blocks contain primitives located within that tile;
and
a testing unit configured to, for the at least one selected tile, determine whether the output of a previous render for that tile can be used as an output for the render based on the per-tile primitive block list and the primitive block data for the primitive blocks indicated therein, and corresponding data from the previous render.

7 more elements

Dependencies are inferred from the claim text.

Reducing redundant rendering in a graphics system

Life of this patent

Reducing redundant rendering in a graphics system

Life of this patent

Abstract

Claims20