/// <summary>
/// Reads the contents of the specified range from an input <see cref="ReadBackBuffer{T}"/> instance and writes them to the current the current <see cref="StructuredBuffer{T}"/> instance.
/// </summary>
/// <param name="source">The input <see cref="UploadBuffer{T}"/> instance to read data from.</param>
/// <param name="sourceOffset">The starting offset within <paramref name="source"/> to read data from.</param>
/// <param name="destinationOffset">The offset to start reading writing data to.</param>
/// <param name="count">The number of items to read.</param>
internal unsafe void CopyFrom(UploadBuffer <T> source, int sourceOffset, int destinationOffset, int count)
{
GraphicsDevice.ThrowIfDisposed();
ThrowIfDisposed();
source.ThrowIfDeviceMismatch(GraphicsDevice);
source.ThrowIfDisposed();
Guard.IsBetweenOrEqualTo(count, 0, Length);
Guard.IsBetweenOrEqualTo(count, 0, source.Length);
Guard.IsInRange(sourceOffset, 0, source.Length);
Guard.IsLessThanOrEqualTo(sourceOffset + count, source.Length, nameof(sourceOffset));
Guard.IsInRange(destinationOffset, 0, Length);
Guard.IsLessThanOrEqualTo(destinationOffset + count, Length, nameof(destinationOffset));
if (GraphicsDevice.IsCacheCoherentUMA)
{
using ID3D12ResourceMap resource = D3D12Resource->Map();
MemoryHelper.Copy <T>(
source: source.MappedData,
destination: resource.Pointer,
sourceElementOffset: (uint)sourceOffset,
destinationElementOffset: (uint)destinationOffset,
sourceElementPitchInBytes: (uint)sizeof(T),
destinationElementPitchInBytes: (uint)sizeof(T),
count: (uint)count);
}
else
{
ulong byteSourceOffset = (uint)sourceOffset * (uint)sizeof(T);
ulong byteOffset = (uint)destinationOffset * (uint)sizeof(T);
ulong byteLength = (uint)count * (uint)sizeof(T);
using CommandList copyCommandList = new(GraphicsDevice, D3D12_COMMAND_LIST_TYPE_COPY);
copyCommandList.D3D12GraphicsCommandList->CopyBufferRegion(D3D12Resource, byteOffset, source.D3D12Resource, byteSourceOffset, byteLength);
copyCommandList.ExecuteAndWaitForCompletion();
}
}
/// <summary>
/// Reads the contents of the specified range from an input <see cref="ReadBackBuffer{T}"/> instance and writes them to the current the current <see cref="StructuredBuffer{T}"/> instance.
/// </summary>
/// <param name="source">The input <see cref="UploadBuffer{T}"/> instance to read data from.</param>
/// <param name="sourceOffset">The starting offset within <paramref name="source"/> to read data from.</param>
/// <param name="length">The number of items to read.</param>
/// <param name="offset">The offset to start reading writing data to.</param>
internal unsafe void CopyFrom(UploadBuffer <T> source, int sourceOffset, int length, int offset)
{
GraphicsDevice.ThrowIfDisposed();
ThrowIfDisposed();
source.ThrowIfDeviceMismatch(GraphicsDevice);
source.ThrowIfDisposed();
Guard.IsInRange(offset, 0, Length, nameof(offset));
Guard.IsLessThanOrEqualTo(offset + length, Length, nameof(length));
Guard.IsInRange(sourceOffset, 0, source.Length, nameof(sourceOffset));
Guard.IsLessThanOrEqualTo(sourceOffset + length, source.Length, nameof(length));
if (GraphicsDevice.IsCacheCoherentUMA)
{
using ID3D12ResourceMap resource = D3D12Resource->Map();
MemoryHelper.Copy(
source.MappedData,
(uint)sourceOffset,
(uint)length,
(uint)sizeof(T),
(T *)resource.Pointer + offset);
}
else
{
ulong
byteSourceOffset = (uint)sourceOffset * (uint)sizeof(T),
byteOffset = (uint)offset * (uint)sizeof(T),
byteLength = (uint)length * (uint)sizeof(T);
using CommandList copyCommandList = new(GraphicsDevice, D3D12_COMMAND_LIST_TYPE_COPY);
copyCommandList.D3D12GraphicsCommandList->CopyBufferRegion(D3D12Resource, byteOffset, source.D3D12Resource, byteSourceOffset, byteLength);
copyCommandList.ExecuteAndWaitForCompletion();
}
}