public unsafe override void UpdateBuffer(DeviceBuffer buffer, uint bufferOffsetInBytes, IntPtr source, uint sizeInBytes)
{
D3D11Buffer d3dBuffer = Util.AssertSubtype <DeviceBuffer, D3D11Buffer>(buffer);
if (sizeInBytes == 0)
{
return;
}
bool isDynamic = (buffer.Usage & BufferUsage.Dynamic) == BufferUsage.Dynamic;
bool isStaging = (buffer.Usage & BufferUsage.Staging) == BufferUsage.Staging;
bool useMap = isDynamic || isStaging;
if (!useMap)
{
ResourceRegion?subregion = null;
if ((d3dBuffer.Buffer.Description.BindFlags & BindFlags.ConstantBuffer) != BindFlags.ConstantBuffer)
{
// For a shader-constant buffer; set pDstBox to null. It is not possible to use
// this method to partially update a shader-constant buffer
subregion = new ResourceRegion()
{
Left = (int)bufferOffsetInBytes,
Right = (int)(sizeInBytes + bufferOffsetInBytes),
Bottom = 1,
Back = 1
};
}
if (bufferOffsetInBytes == 0)
{
_context.UpdateSubresource(d3dBuffer.Buffer, 0, subregion, source, 0, 0);
}
else
{
_context1.UpdateSubresource1(d3dBuffer.Buffer, 0, subregion, source, 0, 0, 0);
}
}
else
{
bool updateFullBuffer = bufferOffsetInBytes == 0 && sizeInBytes == buffer.SizeInBytes;
if (updateFullBuffer && isDynamic)
{
SharpDX.DataBox db = _context.MapSubresource(
d3dBuffer.Buffer,
0,
SharpDX.Direct3D11.MapMode.WriteDiscard,
MapFlags.None);
if (sizeInBytes < 1024)
{
Unsafe.CopyBlock(db.DataPointer.ToPointer(), source.ToPointer(), sizeInBytes);
}
else
{
System.Buffer.MemoryCopy(source.ToPointer(), db.DataPointer.ToPointer(), buffer.SizeInBytes, sizeInBytes);
}
_context.UnmapSubresource(d3dBuffer.Buffer, 0);
}
else
{
D3D11Buffer staging = GetFreeStagingBuffer(sizeInBytes);
_gd.UpdateBuffer(staging, 0, source, sizeInBytes);
CopyBuffer(staging, 0, buffer, bufferOffsetInBytes, sizeInBytes);
_submittedStagingBuffers.Add(staging);
}
}
}
public unsafe override void UpdateBuffer(DeviceBuffer buffer, uint bufferOffsetInBytes, IntPtr source, uint sizeInBytes)
{
D3D11Buffer d3dBuffer = Util.AssertSubtype <DeviceBuffer, D3D11Buffer>(buffer);
if (sizeInBytes == 0)
{
return;
}
bool isDynamic = (buffer.Usage & BufferUsage.Dynamic) == BufferUsage.Dynamic;
bool isStaging = (buffer.Usage & BufferUsage.Staging) == BufferUsage.Staging;
bool isUniformBuffer = (buffer.Usage & BufferUsage.UniformBuffer) == BufferUsage.UniformBuffer;
bool useMap = isDynamic;
bool updateFullBuffer = bufferOffsetInBytes == 0 && sizeInBytes == buffer.SizeInBytes;
bool useUpdateSubresource = !isDynamic && !isStaging && (!isUniformBuffer || updateFullBuffer);
if (useUpdateSubresource)
{
ResourceRegion?subregion = new ResourceRegion()
{
Left = (int)bufferOffsetInBytes,
Right = (int)(sizeInBytes + bufferOffsetInBytes),
Bottom = 1,
Back = 1
};
if (isUniformBuffer)
{
subregion = null;
}
if (bufferOffsetInBytes == 0)
{
_context.UpdateSubresource(d3dBuffer.Buffer, 0, subregion, source, 0, 0);
}
else
{
_context1.UpdateSubresource1(d3dBuffer.Buffer, 0, subregion, source, 0, 0, 0);
}
}
else if (useMap && updateFullBuffer) // Can only update full buffer with WriteDiscard.
{
SharpDX.DataBox db = _context.MapSubresource(
d3dBuffer.Buffer,
0,
D3D11Formats.VdToD3D11MapMode(isDynamic, MapMode.Write),
MapFlags.None);
if (sizeInBytes < 1024)
{
Unsafe.CopyBlock(db.DataPointer.ToPointer(), source.ToPointer(), sizeInBytes);
}
else
{
System.Buffer.MemoryCopy(source.ToPointer(), db.DataPointer.ToPointer(), buffer.SizeInBytes, sizeInBytes);
}
_context.UnmapSubresource(d3dBuffer.Buffer, 0);
}
else
{
D3D11Buffer staging = GetFreeStagingBuffer(sizeInBytes);
_gd.UpdateBuffer(staging, 0, source, sizeInBytes);
CopyBuffer(staging, 0, buffer, bufferOffsetInBytes, sizeInBytes);
_submittedStagingBuffers.Add(staging);
}
}