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Bug 1587695 - Fix redundant SwapChain re-creation r=nical

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Since Bug 1570879, SwapChain is created with alpha at first, then the SwapChain is typically re-created at first RenderCompositorANGLE::BeginFrame() calle, since non Glass window is common since Windows 10. The re-creation is redundant.

Differential Revision: https://phabricator.services.mozilla.com/D48800

--HG--
extra : moz-landing-system : lando
This commit is contained in:
sotaro 2019-10-10 08:58:00 +00:00
parent 62e5fd78b1
commit 2df9cdb3b4
1 changed files with 2 additions and 1 deletions
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3
gfx/webrender_bindings/RenderCompositorANGLE.cpp
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@ -273,7 +273,8 @@ void RenderCompositorANGLE::CreateSwapChainForDCompIfPossible(
MOZ_ASSERT(XRE_IsGPUProcess());
bool useTripleBuffering = gfx::gfxVars::UseWebRenderTripleBufferingWin();
bool useAlpha = true;
// Non Glass window is common since Windows 10.
bool useAlpha = false;
RefPtr<IDXGISwapChain1> swapChain1 =
CreateSwapChainForDComp(useTripleBuffering, useAlpha);
if (swapChain1) {