public static ulong UpdateSubresources(
ID3D12GraphicsCommandList pCmdList,
ID3D12Resource pDestinationResource,
ID3D12Resource pIntermediate,
int FirstSubresource,
int NumSubresources,
ulong RequiredSize,
Span <PlacedSubresourceFootPrint> pLayouts,
Span <int> pNumRows,
Span <ulong> pRowSizesInBytes,
Span <SubresourceData> pSrcData)
{
var IntermediateDesc = pIntermediate.Description;
var DestinationDesc = pDestinationResource.Description;
if (IntermediateDesc.Dimension != ResourceDimension.Buffer ||
IntermediateDesc.Width < RequiredSize + pLayouts[0].Offset ||
(DestinationDesc.Dimension == ResourceDimension.Buffer &&
(FirstSubresource != 0 || NumSubresources != 1)))
{
return(0);
}
int sum = 0;
for (int i = pRowSizesInBytes.Length - 1; i < pRowSizesInBytes.Length; i++)
{
sum = Math.Max((int)pLayouts[i].Offset + pLayouts[i].Footprint.RowPitch * pNumRows[i] * pLayouts[i].Footprint.Depth, sum);
}
Span <byte> pData = pIntermediate.Map <byte>(0, sum);
for (int i = 0; i < NumSubresources; ++i)
{
MemcpySubresource((ulong)pLayouts[i].Footprint.RowPitch, (uint)pLayouts[i].Footprint.RowPitch * (uint)pNumRows[i],
pData.Slice((int)pLayouts[i].Offset), pSrcData[i], (int)pRowSizesInBytes[i], pNumRows[i], pLayouts[i].Footprint.Depth);
}
pIntermediate.Unmap(0, null);
if (DestinationDesc.Dimension == ResourceDimension.Buffer)
{
pCmdList.CopyBufferRegion(
pDestinationResource, 0, pIntermediate, pLayouts[0].Offset, (ulong)pLayouts[0].Footprint.Width);
}
else
{
for (int i = 0; i < NumSubresources; ++i)
{
TextureCopyLocation Dst = new TextureCopyLocation(pDestinationResource, i + FirstSubresource);
TextureCopyLocation Src = new TextureCopyLocation(pIntermediate, pLayouts[i]);
pCmdList.CopyTextureRegion(Dst, 0, 0, 0, Src, null);
}
}
return(RequiredSize);
}
