Exemplo n.º 1
0
        public static MemoryBuffer <T, ArrayView2D <T, Stride2DDenseX> > Allocate2DPitchedX <T>(
            this Accelerator a,
            DimTuple2 extent)
            where T : unmanaged
        {
            // Limitation: Since the underlying storage for our custom ArrayViews is well-typed, can only add padding
            // in increments of sizeof(T) bytes. This limitation could be lifted within this sketch with some unsafe
            // code that always used a backing store of type <byte> and casted pointers on every access.

            long unpitchedBytes;

            unsafe
            {
                if (sizeof(T) > 128 || 128 % sizeof(T) != 0)
                {
                    throw new ArgumentException($"Cannot perform pitched allocation for {nameof(T)}");
                }

                unpitchedBytes = extent.X * sizeof(T);
            }

            var pitchedBytes   = ((unpitchedBytes - 1) / 128 + 1) * 128;
            var pitchedExtentX = pitchedBytes / 128;

            var storage  = a.Allocate <T>(pitchedExtentX * extent.Y);
            var rootView = new ArrayView2D <T, Stride2DDenseX>(storage, extent, new Stride2DDenseX(pitchedExtentX));

            return(new MemoryBuffer <T, ArrayView2D <T, Stride2DDenseX> >(storage, rootView));
        }
Exemplo n.º 2
0
        public static MemoryBuffer <T, ArrayView2D <T, Stride2DDenseY> > Allocate2DDenseY <T>(
            this Accelerator a,
            DimTuple2 extent)
            where T : unmanaged
        {
            var storage  = a.Allocate <T>(extent.X * extent.Y);
            var rootView = new ArrayView2D <T, Stride2DDenseY>(storage, extent, new Stride2DDenseY(extent.X));

            return(new MemoryBuffer <T, ArrayView2D <T, Stride2DDenseY> >(storage, rootView));
        }