Command processing for graphics tile-based rendering

Patent metadata

Field	Value
Publication number	US-2017337656-A1
Application number	US-201615159897-A
Country	US
Kind code	A1
Filing date	May 20, 2016
Priority date	May 20, 2016
Publication date	Nov 23, 2017
Grant date	—

Abstract

The same set of render commands can be re-executed for each of a plurality of tiles making up a graphic scene to be rendered. Each time the list of commands is executed, the way the commands are executed may be modified based on information received from tile pre-processing. Specifically, a jump if command may be inserted into the command list. When this command is encountered, a determination is made, based on information received from tile pre-processing pipeline, whether to execute the command for the next primitive or not. If the next primitive is to be culled then the command for the next primitive is not executed and the flow moves past that command. If the next primitive is to be executed then the jump is not implemented. This enables avoiding reloading the same list of commands over and over for every tile.

First claim

What is claimed is:

1 . A method comprising:
performing tile pre-processing to identify primitives to be culled during subsequent rendering; inserting an added command in a list of render commands; executing the list of render commands for each of a plurality of tiles; and on execution of the command list for each tile, using the added command to determine whether to avoid executing an ensuing primitive specific command based on the identification of primitives to be culled.

2 . The method of claim 1 wherein tile pre-processing includes performing position only shading.

3 . The method of claim 1 including providing tokens to indicate whether to interpret the added command as a command to skip an ensuing primitive.

4 . The method of claim 3 including providing an offset to locate the next command to execute with said added command.

5 . The method of claim 4 including providing two offsets if a draw is a next chained command buffer.

6 . The method of claim 1 wherein said added command is a jump if command.

7 . The method of claim 1 wherein a primitive draw command and primitive specific state command are selectively skipped.

8 . The method of claim 7 wherein commands that are not primitive specific are not skipped.

9 . One or more non-transitory computer readable media storing instructions to perform a sequence comprising:
performing tile pre-processing to identify primitives to be culled during subsequent rendering; inserting an added command in a list of render commands; executing the list of render commands for each of a plurality of tiles; and on execution of the command list for each tile, using the added command to determine whether to avoid executing an ensuing primitive specific command based on the identification of primitives to be culled.

10 . The media of claim 9 wherein tile pre-processing includes performing position only shading.

11 . The media of claim 9 , further storing instructions to perform a sequence including providing tokens to indicate whether to interpret the added command as a command to skip an ensuing primitive.

12 . The media of claim 11 , further storing instructions to perform a sequence including providing an offset to locate the next command to execute with said added command.

13 . The media of claim 12 , further storing instructions to perform a sequence including providing two offsets if a draw is a next chained command buffer.

14 . The media of claim 9 wherein said added command is a jump if command.

15 . The media of claim 9 wherein a primitive draw command and primitive specific state command are selectively skipped.

16 . The media of claim 15 wherein commands that are not primitive specific are not skipped.

17 . An apparatus comprising:
a processor to perform tile pre-processing to identify primitives to be culled during subsequent rendering, insert an added command in a list of render commands, execute the list of render commands for each of a plurality of tiles, on execution of the command list for each tile, and use the added command to determine whether to avoid executing an ensuing primitive specific command based on the identification of primitives to be culled; and a memory coupled to said processor.

18 . The apparatus of claim 17 wherein tile pre-processing includes performing position only shading.

19 . The apparatus of claim 17 , said processor to provide tokens to indicate whether to interpret the added command as a command to skip an ensuing primitive.

20 . The apparatus of claim 19 , said processor to provide an offset to locate the next command to execute with said added command.

21 . The apparatus of claim 20 , said processor to provide two offsets if a draw is a next chained command buffer.

22 . The apparatus of claim 17 , wherein said added command is a jump if command.

23 . The apparatus of claim 17 , wherein a primitive draw command and primitive specific state command are selectively skipped.

24 . The apparatus of claim 17 wherein commands that are not primitive specific are not skipped.

Assignees

• Intel Corp

Inventors

• Vembu Balaji
• Doyle Peter L
• Apodaca Michael
• Nalluri Hema C
• Boles Jeffery S

Classifications

• G06T11/40 Primary

  Filling planar surfaces by adding surface attributes, e.g. adding colours or textures · CPC title

• G06T1/60

  Memory management · CPC title

• G06T15/005

  General purpose rendering architectures · CPC title

• G06T15/80

  Shading · CPC title

• G06T1/20 Primary

  Processor architectures; Processor configuration, e.g. pipelining · CPC title