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Added automatic surface restoration for D3D buffers

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Some D3D buffers (e.g. vertex buffers) use DirectDraw surfaces for storage.
Since a previous fix for forcing the emulated pixel format on surfaces broke
Alt-Tabbing in Messiah, this fixes it by automatically restoring D3D buffers
during Lock.
If this causes other issues, the only alternative seems to be forcing these
surfaces to system memory (which was the previous broken behavior).
This commit is contained in:
narzoul 2015-12-29 22:58:03 +01:00
parent db02afefa9
commit 640dbf6412
1 changed files with 15 additions and 1 deletions
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16
DDrawCompat/CompatDirectDrawSurface.cpp
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@ -521,7 +521,21 @@ HRESULT STDMETHODCALLTYPE CompatDirectDrawSurface<TSurface>::Lock(
{
return DDERR_SURFACELOST;
}
return s_origVtable.Lock(This, lpDestRect, lpDDSurfaceDesc, dwFlags, hEvent);
HRESULT result = s_origVtable.Lock(This, lpDestRect, lpDDSurfaceDesc, dwFlags, hEvent);
if (DDERR_SURFACELOST == result)
{
TSurfaceDesc desc = {};
desc.dwSize = sizeof(desc);
if (SUCCEEDED(s_origVtable.GetSurfaceDesc(This, &desc)) && !(desc.dwFlags & DDSD_HEIGHT))
{
// Fixes missing handling for lost vertex buffers in Messiah
s_origVtable.Restore(This);
// Still, pass back DDERR_SURFACELOST to the application in case it handles it
}
}
return result;
}
template <typename TSurface>