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rhi: d3d11: Do not rely on Win10-only enum value

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When building against a 8.1 or older SDK the Windows 10-only value
DXGI_SWAP_EFFECT_FLIP_DISCARD may not be present. Just use the value
directly. At runtime that code path cannot be hit anyway when running
on 8.1 or older.

Task-number: QTBUG-80084
Change-Id: I0974b82db770e5487315798432ee601937b96c5e
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
This commit is contained in:
Laszlo Agocs 2019-11-16 19:25:11 +01:00
parent 924887965c
commit 5142fe2c54
1 changed files with 1 additions and 1 deletions
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src/gui/rhi/qrhid3d11.cpp
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@ -3922,7 +3922,7 @@ bool QD3D11SwapChain::buildOrResize()
desc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
desc.BufferCount = BUFFER_COUNT;
desc.Scaling = DXGI_SCALING_STRETCH;
desc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_DISCARD;
desc.SwapEffect = DXGI_SWAP_EFFECT(4); // DXGI_SWAP_EFFECT_FLIP_DISCARD
// Do not bother with AlphaMode, if won't work unless we go through
// DirectComposition. Instead, we just take the other (DISCARD)
// path for now when alpha is requested.