1973147 - Use DCSwapChain instead of DCLayerCompositionSurface when overlay does not exist

Status: RESOLVED FIXED

(Core :: Graphics: WebRender, task)

Description

[Sotaro Ikeda [:sotaro]]

Use swap chain could improve performance in some STRs. Though we could not use it when overlay exist. See Bug 1949102.

Comment 1

[Sotaro Ikeda [:sotaro]]

In chromium, UpdateRenderPassFromOverlayData() fallback to swap chain if kNumberOfFramesBeforeDisablingDCLayers(60) frames are generated since overlay becomes empty.

Switch between IDXGISwapChain and IDCompositionSurface takes time.

Comment 2

[Sotaro Ikeda [:sotaro]]

Attachment: Bug 1973147 - Use DCSwapChain instead of DCLayerCompositionSurface when overlay does not exist

Comment 3

[Sotaro Ikeda [:sotaro]]

With D254484, talos performance is improved.
https://perf.compare/compare-results?baseRev=a7b622a93c8ff36b3033a8639a151c2e3ec02455&baseRepo=try&newRev=a7b622a93c8ff36b3033a8639a151c2e3ec02455&newRepo=try&newRev=49fa003317ec94fd6b86097624cb4abed7c7bbbc&newRepo=try&framework=1&filter_status=improvement%2Cregression

Comment 4

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/db5962265cc1
https://hg.mozilla.org/integration/autoland/rev/37900c81da04
Use DCSwapChain instead of DCLayerCompositionSurface when overlay does not exist r=gfx-reviewers,lsalzman

Comment 5

[pstanciu]

https://hg.mozilla.org/mozilla-central/rev/37900c81da04