public D3D11Buffer(Device device, uint sizeInBytes, BufferUsage usage, uint structureByteStride)
{
SizeInBytes = sizeInBytes;
Usage = usage;
SharpDX.Direct3D11.BufferDescription bd = new SharpDX.Direct3D11.BufferDescription(
(int)sizeInBytes,
D3D11Formats.VdToD3D11BindFlags(usage),
ResourceUsage.Default);
if ((usage & BufferUsage.StructuredBufferReadOnly) == BufferUsage.StructuredBufferReadOnly ||
(usage & BufferUsage.StructuredBufferReadWrite) == BufferUsage.StructuredBufferReadWrite)
{
bd.OptionFlags = ResourceOptionFlags.BufferStructured;
bd.StructureByteStride = (int)structureByteStride;
}
if ((usage & BufferUsage.IndirectBuffer) == BufferUsage.IndirectBuffer)
{
bd.OptionFlags = ResourceOptionFlags.DrawIndirectArguments;
}
if ((usage & BufferUsage.Dynamic) == BufferUsage.Dynamic)
{
bd.Usage = ResourceUsage.Dynamic;
bd.CpuAccessFlags = CpuAccessFlags.Write;
}
else if ((usage & BufferUsage.Staging) == BufferUsage.Staging)
{
bd.Usage = ResourceUsage.Staging;
bd.CpuAccessFlags = CpuAccessFlags.Read | CpuAccessFlags.Write;
}
_buffer = new SharpDX.Direct3D11.Buffer(device, bd);
if ((usage & BufferUsage.StructuredBufferReadWrite) == BufferUsage.StructuredBufferReadWrite ||
(usage & BufferUsage.StructuredBufferReadOnly) == BufferUsage.StructuredBufferReadOnly)
{
ShaderResourceViewDescription srvDesc = new ShaderResourceViewDescription
{
Dimension = SharpDX.Direct3D.ShaderResourceViewDimension.Buffer
};
srvDesc.Buffer.ElementCount = (int)(SizeInBytes / structureByteStride);
ShaderResourceView = new ShaderResourceView(device, _buffer, srvDesc);
}
if ((usage & BufferUsage.StructuredBufferReadWrite) == BufferUsage.StructuredBufferReadWrite)
{
UnorderedAccessViewDescription uavDesc = new UnorderedAccessViewDescription
{
Dimension = UnorderedAccessViewDimension.Buffer
};
uavDesc.Buffer.ElementCount = (int)(SizeInBytes / structureByteStride);
uavDesc.Format = SharpDX.DXGI.Format.Unknown;
UnorderedAccessView = new UnorderedAccessView(device, _buffer, uavDesc);
}
}
public D3D11Buffer(ID3D11Device device, uint sizeInBytes, BufferUsage usage, uint structureByteStride, bool rawBuffer)
{
_device = device;
SizeInBytes = sizeInBytes;
Usage = usage;
_structureByteStride = structureByteStride;
_rawBuffer = rawBuffer;
Vortice.Direct3D11.BufferDescription bd = new Vortice.Direct3D11.BufferDescription(
(int)sizeInBytes,
D3D11Formats.VdToD3D11BindFlags(usage),
ResourceUsage.Default);
if ((usage & BufferUsage.StructuredBufferReadOnly) == BufferUsage.StructuredBufferReadOnly ||
(usage & BufferUsage.StructuredBufferReadWrite) == BufferUsage.StructuredBufferReadWrite)
{
if (rawBuffer)
{
bd.OptionFlags = ResourceOptionFlags.BufferAllowRawViews;
}
else
{
bd.OptionFlags = ResourceOptionFlags.BufferStructured;
bd.StructureByteStride = (int)structureByteStride;
}
}
if ((usage & BufferUsage.IndirectBuffer) == BufferUsage.IndirectBuffer)
{
bd.OptionFlags = ResourceOptionFlags.DrawIndirectArguments;
}
if ((usage & BufferUsage.Dynamic) == BufferUsage.Dynamic)
{
bd.Usage = ResourceUsage.Dynamic;
bd.CpuAccessFlags = CpuAccessFlags.Write;
}
else if ((usage & BufferUsage.Staging) == BufferUsage.Staging)
{
bd.Usage = ResourceUsage.Staging;
bd.CpuAccessFlags = CpuAccessFlags.Read | CpuAccessFlags.Write;
}
_buffer = device.CreateBuffer(bd);
}
