public static long UpdateSubResources(GraphicsCommandList cmdList, Resource destResource, Resource intermediateResource, int firstSubresource, int numSubresource, long requiredSize, PlacedSubResourceFootprint[] layouts, long[] rowSizesInBytes, SubResourceInformation[] datas)
{
var intermediateDesc = intermediateResource.Description;
var destDesc = destResource.Description;
var dataPtr = Marshal.UnsafeAddrOfPinnedArrayElement(datas, 0);
if (intermediateDesc.Dimension != ResourceDimension.Buffer ||
intermediateDesc.Width < requiredSize + layouts[0].Offset ||
requiredSize == 0 ||
(destDesc.Dimension == ResourceDimension.Buffer &&
(firstSubresource != 0) || numSubresource != 1))
{
return(0);
}
var ptr = intermediateResource.Map(0, null);
if (ptr == IntPtr.Zero)
{
return(0);
}
for (int idx = 0; idx < numSubresource; idx++)
{
if (rowSizesInBytes[idx] == 0)
{
return(0);
}
intermediateResource.WriteToSubresource(idx, null, new IntPtr(datas[idx].Offset), datas[idx].RowPitch, datas[idx].DepthPitch);
}
if (destDesc.Dimension == ResourceDimension.Buffer)
{
cmdList.CopyBufferRegion(destResource, 0, intermediateResource, layouts[0].Offset, layouts[0].Footprint.Width);
}
else
{
for (int idx = 0; idx < numSubresource; idx++)
{
var dest = new TextureCopyLocation(destResource, idx + firstSubresource);
var src = new TextureCopyLocation(intermediateResource, layouts[idx]);
cmdList.CopyTextureRegion(dest, 0, 0, 0, src, null);
}
}
return(requiredSize);
}
