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Fix regression where WARP could be used as a fallback on Windows 7. (bug 1179051 part 2.1, r=jrmuizel)

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This commit is contained in:
David Anderson 2015-07-16 14:45:06 -07:00
parent 1e4edcb34a
commit 09b894c613
1 changed files with 10 additions and 15 deletions
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25
gfx/thebes/gfxWindowsPlatform.cpp
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@ -1914,12 +1914,6 @@ gfxWindowsPlatform::CheckD3D11Support() -> D3D11Status
if (gfxPrefs::LayersD3D11DisableWARP() || GetModuleHandleA("nvdxgiwrap.dll")) {
return D3D11Status::Blocked;
}
if (!IsWin8OrLater()) {
// We do not use WARP on Windows 7 or earlier.
return D3D11Status::Blocked;
}
return D3D11Status::TryWARP;
}
}
@ -1978,10 +1972,6 @@ gfxWindowsPlatform::AttemptD3D11DeviceCreation(const nsTArray<D3D_FEATURE_LEVEL>
bool
gfxWindowsPlatform::AttemptWARPDeviceCreation(const nsTArray<D3D_FEATURE_LEVEL>& aFeatureLevels)
{
if (gfxPrefs::LayersD3D11DisableWARP()) {
return false;
}
MOZ_ASSERT(!mD3D11Device);
ScopedGfxFeatureReporter reporterWARP("D3D11-WARP", gfxPrefs::LayersD3D11ForceWARP());
@ -2102,11 +2092,16 @@ gfxWindowsPlatform::InitD3D11Devices()
}
}
if (status == D3D11Status::TryWARP || status == D3D11Status::ForceWARP) {
if (!AttemptWARPDeviceCreation(featureLevels)) {
// Nothing more we can do.
return;
}
if (IsWin8OrLater() &&
!gfxPrefs::LayersD3D11DisableWARP() &&
(status == D3D11Status::TryWARP || status == D3D11Status::ForceWARP))
{
AttemptWARPDeviceCreation(featureLevels);
}
if (!mD3D11Device) {
// We could not get a D3D11 compositor, and there's nothing more we can try.
return;
}
if (!mD3D11Device) {