public BaseIndirectBuffer(DxDevice device, T args)
{
this.device = device;
int size = Marshal.SizeOf(args);
BufferDescription bd = new BufferDescription();
bd.Usage = ResourceUsage.Default;
bd.StructureByteStride = 0;
bd.SizeInBytes = size;
bd.CpuAccessFlags = CpuAccessFlags.None;
bd.BindFlags = BindFlags.None;
bd.OptionFlags = ResourceOptionFlags.DrawIndirectArguments;
DataStream dsb = new DataStream(size, false, true);
dsb.Position = 0;
dsb.Write <T>(args);
dsb.Position = 0;
this.ArgumentBuffer = new SharpDX.Direct3D11.Buffer(device.Device, dsb, bd);
dsb.Dispose();
this.WriteBuffer = DX11StructuredBuffer.CreateWriteable(device, size / 4, 4);
}
public DX11StructuredBuffer CopyToStructuredBuffer(RenderContext context)
{
if (this.format != SharpDX.DXGI.Format.R32_UInt)
{
throw new Exception("Only Large indices formats supported");
}
DX11StructuredBuffer sb = DX11StructuredBuffer.CreateWriteable <uint>(this.device, this.IndicesCount);
context.Context.CopyResource(this.Buffer, sb.Buffer);
return(sb);
}