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[host] d12: bound damage metadata

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This commit is contained in:
Geoffrey McRae
2026-08-24 13:03:56 +10:00
parent 9bbccfdcb9
commit 6579fe9098
2 changed files with 63 additions and 9 deletions
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36
host/platform/Windows/capture/D12/backend/dd.c
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@@ -538,7 +538,9 @@ static bool d12_dd_handleFrameUpdate(DDInstance * this, IDXGIResource * res)
&requiredSize);
if (FAILED(hr))
{
if (hr != DXGI_ERROR_MORE_DATA)
if (hr == DXGI_ERROR_MORE_DATA)
goto fullDamage;
else
{
DEBUG_WINERROR("GetFrameDirtyRects failed", hr);
goto exit;
@@ -546,6 +548,10 @@ static bool d12_dd_handleFrameUpdate(DDInstance * this, IDXGIResource * res)
}
else
{
if (requiredSize % sizeof(*this->current->dirtyRects) ||
requiredSize > sizeof(this->current->dirtyRects))
goto fullDamage;
unsigned nbDirtyRects = requiredSize / sizeof(*this->current->dirtyRects);
// if there is only one damage rect and it covers the entire frame
@@ -559,21 +565,32 @@ static bool d12_dd_handleFrameUpdate(DDInstance * this, IDXGIResource * res)
this->current->nbDirtyRects = nbDirtyRects;
}
DXGI_OUTDUPL_MOVE_RECT moveRects[
(ARRAY_LENGTH(this->current->dirtyRects) - this->current->nbDirtyRects) / 2
];
const unsigned moveCapacity =
(ARRAY_LENGTH(this->current->dirtyRects) -
this->current->nbDirtyRects) / 2;
if (!moveCapacity)
goto fullDamage;
DXGI_OUTDUPL_MOVE_RECT moveRects[D12_MAX_DIRTY_RECTS / 2];
const UINT moveBufferSize =
moveCapacity * sizeof(*moveRects);
hr = IDXGIOutputDuplication_GetFrameMoveRects(*this->dup,
sizeof(moveRects), moveRects, &requiredSize);
moveBufferSize, moveRects, &requiredSize);
if (FAILED(hr))
{
this->current->nbDirtyRects = 0;
if (hr != DXGI_ERROR_MORE_DATA)
if (hr == DXGI_ERROR_MORE_DATA)
goto fullDamage;
else
{
DEBUG_WINERROR("GetFrameMoveRects failed", hr);
goto exit;
}
}
if (requiredSize % sizeof(*moveRects) ||
requiredSize > moveBufferSize)
goto fullDamage;
/* Move rects are seemingly not generated on Windows 10, but incase it
* becomes a thing in the future we still need to implement this */
const unsigned moveRectCount = requiredSize / sizeof(*moveRects);
@@ -587,6 +604,10 @@ static bool d12_dd_handleFrameUpdate(DDInstance * this, IDXGIResource * res)
moveRect->SourcePoint.y == moveRect->DestinationRect.top)
continue;
if (this->current->nbDirtyRects >
ARRAY_LENGTH(this->current->dirtyRects) - 2)
goto fullDamage;
/* Add the source rect to the dirty array */
this->current->dirtyRects[this->current->nbDirtyRects++] = (RECT)
{
@@ -605,6 +626,7 @@ static bool d12_dd_handleFrameUpdate(DDInstance * this, IDXGIResource * res)
}
fullDamage:
this->current->nbDirtyRects = 0;
result = true;
exit: