1984709 - Add DXGISwapChain tearing support to DCSwapChain

Status: RESOLVED FIXED

(Core :: Graphics: WebRender, enhancement)

Description

[Sotaro Ikeda [:sotaro]]

It could improve performance if Variable refresh rate display is supported.
https://learn.microsoft.com/en-us/windows/win32/direct3ddxgi/variable-refresh-rate-displays

Comment 1

[Sotaro Ikeda [:sotaro]]

The tearing support mitigated performance degradation more than Bug 1983735. It is within the acceptable range.
https://perf.compare/compare-results?baseRev=7acb2884e07e52175871351ccf87675a37accf95&baseRepo=try&newRev=d09a9f025f729e360785117aad0f9388048f2e1b&newRepo=try&framework=1

Comment 2

[Sotaro Ikeda [:sotaro]]

Attachment: Bug 1984709 - Add DXGISwapChain tearing support to DCSwapChain

Tearing support could improve performance if Variable refresh rate display is supported.

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/ae4495f8943c
https://hg.mozilla.org/integration/autoland/rev/488f7a910fe4
Add DXGISwapChain tearing support to DCSwapChain r=gfx-reviewers,lsalzman

Comment 4

[Jeff Muizelaar [:jrmuizel]]

Does Chrome turn on tearing by default?

Comment 5

[Sotaro Ikeda [:sotaro]]

Yes, chromium uses the tearing when it is supported and vsync is not GPU vsync.

• DirectCompositionSwapChainTearingEnabled()
• DXGISwapChainTearingSupported()

Comment 6

[Cristian Tuns]

https://hg.mozilla.org/mozilla-central/rev/488f7a910fe4