private T Reduce <T>(UploadBuffer data, ReduceShader shader) where T : struct
{
Console.WriteLine("num groups: " + Utility.DivideRoundUp(data.ByteSize / 4, ReduceShader.ElementsPerGroup));
using (var buf = new GpuBuffer(4, data.ByteSize / 4))
{
buf.CopyFrom(data);
using (var timer = new GpuTimer())
{
timer.Start();
//for(int i = 0; i < 100; ++i)
shader.Run(buf, data.ByteSize / 4);
timer.Stop();
Console.WriteLine(timer.GetDelta());
}
using (var res = new DownloadBuffer(4))
{
res.CopyFrom(buf, Marshal.SizeOf <T>());
var resData = res.GetData <T>();
return(resData);
}
}
}
