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Use tighter packing for non-planar resources #105

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Merged
vdwtanner merged 1 commit into from
Mar 16, 2026
+20 −0
Merged

Use tighter packing for non-planar resources #105

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20 changes: 20 additions & 0 deletions src/9on12Resource.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -900,6 +900,26 @@ namespace D3D9on12
&m_physicalLinearRepresentation.m_rowPitces[0],
&m_totalSize);

// If unrestricted pitch is supported, we can use tighter packing for non-planar resources
// instead of the default 256-byte alignment that GetCopyableFootprints applies
if (m_pParentDevice->GetContext().GetOptions13().UnrestrictedBufferTextureCopyPitchSupported && m_NonOpaquePlaneCount == 1)
{
m_totalSize = 0;
for (UINT subresourceIndex = 0; subresourceIndex < m_numSubresources; subresourceIndex++)
{
auto& footprint = m_physicalLinearRepresentation.m_footprints[subresourceIndex];

UINT minPitch = 0;
CD3D11FormatHelper::CalculateMinimumRowMajorRowPitch(footprint.Footprint.Format, footprint.Footprint.Width, minPitch);
footprint.Footprint.RowPitch = minPitch;
footprint.Offset = m_totalSize;

UINT slicePitch = 0;
CD3D11FormatHelper::CalculateMinimumRowMajorSlicePitch(footprint.Footprint.Format, footprint.Footprint.RowPitch, footprint.Footprint.Height, slicePitch);
m_totalSize += slicePitch * footprint.Footprint.Depth;
}
}

// We can safely skip initializing app memory information if only the first surf is
// initialized because this only happens as when we internally create this resource
// and won't be working with any app initial memory
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