/// <summary>
/// Explicitly recreate buffer with given data. Usually called after a <see cref="GraphicsDevice"/> reset.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="dataPointer"></param>
public void Recreate(IntPtr dataPointer)
{
// TODO D3D12 where should that go longer term? should it be precomputed for future use? (cost would likely be additional check on SetDescriptorSets/Draw)
NativeResourceState = ResourceStates.Common;
var bufferFlags = bufferDescription.BufferFlags;
if ((bufferFlags & BufferFlags.ConstantBuffer) != 0)
{
NativeResourceState |= ResourceStates.VertexAndConstantBuffer;
}
if ((bufferFlags & BufferFlags.IndexBuffer) != 0)
{
NativeResourceState |= ResourceStates.IndexBuffer;
}
if ((bufferFlags & BufferFlags.VertexBuffer) != 0)
{
NativeResourceState |= ResourceStates.VertexAndConstantBuffer;
}
if ((bufferFlags & BufferFlags.ShaderResource) != 0)
{
NativeResourceState |= ResourceStates.PixelShaderResource | ResourceStates.NonPixelShaderResource;
}
if ((bufferFlags & BufferFlags.StructuredBuffer) != 0)
{
if (bufferDescription.StructureByteStride <= 0)
{
throw new ArgumentException("Element size cannot be less or equal 0 for structured buffer");
}
}
if ((bufferFlags & BufferFlags.ArgumentBuffer) == BufferFlags.ArgumentBuffer)
{
NativeResourceState |= ResourceStates.IndirectArgument;
}
var heapType = HeapType.Default;
if (Usage == GraphicsResourceUsage.Staging)
{
if (dataPointer != IntPtr.Zero)
{
throw new NotImplementedException("D3D12: Staging buffers can't be created with initial data.");
}
heapType = HeapType.Readback;
NativeResourceState = ResourceStates.CopyDestination;
}
else if (Usage == GraphicsResourceUsage.Dynamic)
{
heapType = HeapType.Upload;
NativeResourceState = ResourceStates.GenericRead;
}
// TODO D3D12 move that to a global allocator in bigger committed resources
NativeDeviceChild = GraphicsDevice.NativeDevice.CreateCommittedResource(new HeapProperties(heapType), HeapFlags.None, nativeDescription, dataPointer != IntPtr.Zero ? ResourceStates.CopyDestination : NativeResourceState);
GPUVirtualAddress = NativeResource.GPUVirtualAddress;
if (dataPointer != IntPtr.Zero)
{
if (heapType == HeapType.Upload)
{
var uploadMemory = NativeResource.Map(0);
Utilities.CopyMemory(uploadMemory, dataPointer, SizeInBytes);
NativeResource.Unmap(0);
}
else
{
// Copy data in upload heap for later copy
// TODO D3D12 move that to a shared upload heap
SharpDX.Direct3D12.Resource uploadResource;
int uploadOffset;
var uploadMemory = GraphicsDevice.AllocateUploadBuffer(SizeInBytes, out uploadResource, out uploadOffset);
Utilities.CopyMemory(uploadMemory, dataPointer, SizeInBytes);
// TODO D3D12 lock NativeCopyCommandList usages
var commandList = GraphicsDevice.NativeCopyCommandList;
commandList.Reset(GraphicsDevice.NativeCopyCommandAllocator, null);
// Copy from upload heap to actual resource
commandList.CopyBufferRegion(NativeResource, 0, uploadResource, uploadOffset, SizeInBytes);
// Switch resource to proper read state
commandList.ResourceBarrierTransition(NativeResource, 0, ResourceStates.CopyDestination, NativeResourceState);
commandList.Close();
GraphicsDevice.WaitCopyQueue();
}
}
NativeShaderResourceView = GetShaderResourceView(ViewFormat);
NativeUnorderedAccessView = GetUnorderedAccessView(ViewFormat);
}
internal void Collect(NativeResource nativeResource)
{
nativeResourceCollector.Add(NextFenceValue, nativeResource);
}