ManagedCuda.NPP.NPPImage_8uC3.NPPImage_8uC3 C# (CSharp) Method

        public NPPImage_8uC3(int nWidthPixels, int nHeightPixels)
        {
            _sizeOriginal.width = nWidthPixels;
            _sizeOriginal.height = nHeightPixels;
            _sizeRoi.width = nWidthPixels;
            _sizeRoi.height = nHeightPixels;
            _channels = 3;
            _isOwner = true;
            _typeSize = sizeof(byte);

            _devPtr = NPPNativeMethods.NPPi.MemAlloc.nppiMalloc_8u_C3(nWidthPixels, nHeightPixels, ref _pitch);
            Debug.WriteLine(String.Format("{0:G}, {1}: {2}, Pitch is: {3}, Number of color channels: {4}", DateTime.Now, "nppiMalloc_8u_C3", res, _pitch, _channels));

            if (_devPtr.Pointer == 0)
            {
                throw new NPPException("Device allocation error", null);
            }
            _devPtrRoi = _devPtr;
        }