BitMiracle.LibJpeg.Classic.Internal.my_merged_upsampler.h2v1_merged_upsample C# (CSharp) Метод

        private void h2v1_merged_upsample(ComponentBuffer[] input_buf, int in_row_group_ctr, byte[][] output_buf, int outRow)
        {
            int inputIndex0 = 0;
            int inputIndex1 = 0;
            int inputIndex2 = 0;
            int outputIndex = 0;

            byte[] limit = m_cinfo.m_sample_range_limit;
            int limitOffset = m_cinfo.m_sampleRangeLimitOffset;

            /* Loop for each pair of output pixels */
            for (int col = m_cinfo.m_output_width >> 1; col > 0; col--)
            {
                /* Do the chroma part of the calculation */
                int cb = input_buf[1][in_row_group_ctr][inputIndex1];
                inputIndex1++;

                int cr = input_buf[2][in_row_group_ctr][inputIndex2];
                inputIndex2++;

                int cred = m_Cr_r_tab[cr];
                int cgreen = JpegUtils.RIGHT_SHIFT(m_Cb_g_tab[cb] + m_Cr_g_tab[cr], SCALEBITS);
                int cblue = m_Cb_b_tab[cb];

                /* Fetch 2 Y values and emit 2 pixels */
                int y = input_buf[0][in_row_group_ctr][inputIndex0];
                inputIndex0++;

                output_buf[outRow][outputIndex + JpegConstants.RGB_RED] = limit[limitOffset + y + cred];
                output_buf[outRow][outputIndex + JpegConstants.RGB_GREEN] = limit[limitOffset + y + cgreen];
                output_buf[outRow][outputIndex + JpegConstants.RGB_BLUE] = limit[limitOffset + y + cblue];
                outputIndex += JpegConstants.RGB_PIXELSIZE;
                
                y = input_buf[0][in_row_group_ctr][inputIndex0];
                inputIndex0++;

                output_buf[outRow][outputIndex + JpegConstants.RGB_RED] = limit[limitOffset + y + cred];
                output_buf[outRow][outputIndex + JpegConstants.RGB_GREEN] = limit[limitOffset + y + cgreen];
                output_buf[outRow][outputIndex + JpegConstants.RGB_BLUE] = limit[limitOffset + y + cblue];
                outputIndex += JpegConstants.RGB_PIXELSIZE;
            }

            /* If image width is odd, do the last output column separately */
            if ((m_cinfo.m_output_width & 1) != 0)
            {
                int cb = input_buf[1][in_row_group_ctr][inputIndex1];
                int cr = input_buf[2][in_row_group_ctr][inputIndex2];
                int cred = m_Cr_r_tab[cr];
                int cgreen = JpegUtils.RIGHT_SHIFT(m_Cb_g_tab[cb] + m_Cr_g_tab[cr], SCALEBITS);
                int cblue = m_Cb_b_tab[cb];
                
                int y = input_buf[0][in_row_group_ctr][inputIndex0];
                output_buf[outRow][outputIndex + JpegConstants.RGB_RED] = limit[limitOffset + y + cred];
                output_buf[outRow][outputIndex + JpegConstants.RGB_GREEN] = limit[limitOffset + y + cgreen];
                output_buf[outRow][outputIndex + JpegConstants.RGB_BLUE] = limit[limitOffset + y + cblue];
            }
        }