[webkit-changes] [WebKit/WebKit] 2eaacb: [WebGPU] index buffer support

[mwyrzykowski]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 2eaacb29a834ef362921d003b78d73e1354fbcf7
      https://github.com/WebKit/WebKit/commit/2eaacb29a834ef362921d003b78d73e1354fbcf7
  Author: Mike Wyrzykowski <mwyrzykowski at apple.com>
  Date:   2022-12-20 (Tue, 20 Dec 2022)

  Changed paths:
    M Source/WebGPU/WebGPU/RenderPassEncoder.h
    M Source/WebGPU/WebGPU/RenderPassEncoder.mm
    A Websites/webkit.org/demos/webgpu/hello-indexed-cube.html
    A Websites/webkit.org/demos/webgpu/scripts/hello-indexed-cube.js

  Log Message:
  -----------
  [WebGPU] index buffer support
https://bugs.webkit.org/show_bug.cgi?id=249238
<radar://103240396>

Reviewed by Myles C. Maxfield and Dean Jackson.

Implement index buffer support and add a test case.

Also implement setScissorRect. Everything was implemented
except the call in WebGPU.

* Source/WebGPU/WebGPU/RenderPassEncoder.h:
* Source/WebGPU/WebGPU/RenderPassEncoder.mm:
(WebGPU::RenderPassEncoder::drawIndexed):
(WebGPU::RenderPassEncoder::setIndexBuffer):
Call respective metal commands for drawing indexed primitives.

(WebGPU::RenderPassEncoder::setScissorRect):
Implement setScissorRect with coordinates specified in pixels.
* Websites/webkit.org/demos/webgpu/hello-indexed-cube.html: Added.
* Websites/webkit.org/demos/webgpu/scripts/hello-indexed-cube.js: Added.
(async helloCube.frameUpdate):
(async helloCube):
Rotating cube with 8 vertices and 36 indices.

Canonical link: https://commits.webkit.org/258168@main