Bug 313159 – WebGPU doesn't show result with direct texture usage and multisampled resolve

• Component: WebGPU
• Status: RESOLVED FIXED

[Gregg Tavares]

Created attachment 479272 [details]
repo

Run the attached sample. You should see a flashing red screen. Works in Firefox and Chrome,not in Safari. There are no validation errors

The sample uses direct texture vs texture views. In other words

encoder.beginPass({
  colorAttachments: [
    {
       view: someMultiSampledTexture,  // Not a GPUTextureView
       resolveTarget: someTexture,   // Not a GPUTextureView
       ...
    },
  ],
});

[Mike Wyrzykowski]

_MTLDebugValidateRenderPassDescriptorAndTrackAttachments:370: failed assertion `RenderPass Descriptor Validation
MTLRenderPassAttachmentDescriptor resolveTexture must have storeAction of MTLStoreActionMultisampleResolve, MTLStoreActionStoreAndMultisampleResolve or MTLStoreActionUnknown

[Mike Wyrzykowski]

Thank you for the repro Gregg

[Radar WebKit Bug Importer]

<rdar://problem/175452924>

[Mike Wyrzykowski]

Pull request: https://github.com/WebKit/WebKit/pull/63459

[EWS]

Committed 311938@main (626105188e7e): <https://commits.webkit.org/311938@main>

Reviewed commits have been landed. Closing PR #63459 and removing active labels.