Hjg.Pngcs.PngReader.UnfilterRowAverage C# (CSharp) Method

        private void UnfilterRowAverage(int nbytes)
        {
            int i, j, x;
            for (j = 1 - ImgInfo.BytesPixel, i = 1; i <= nbytes; i++, j++) {
                x = (j > 0) ? rowb[j] : (byte)0;
                rowb[i] = (byte)(rowbfilter[i] + (x + (rowbprev[i] & 0xFF)) / 2);
            }
        }