3204    png_alloc_size_t row_width = png_ptr->width;  in png_combine_row()  local
3223           PNG_ROWBYTES(pixel_depth, row_width))  in png_combine_row()
3227    if (row_width == 0)  in png_combine_row()
3234    end_mask = (pixel_depth * row_width) & 7;  in png_combine_row()
3238       end_ptr = dp + PNG_ROWBYTES(pixel_depth, row_width) - 1;  in png_combine_row()
3267       if (row_width <= PNG_PASS_START_COL(pass))  in png_combine_row()
3436             if (row_width <= pixels_per_byte)  in png_combine_row()
3439             row_width -= pixels_per_byte;  in png_combine_row()
3454          row_width *= pixel_depth;  in png_combine_row()
3463             row_width -= offset;  in png_combine_row()
3478             if (bytes_to_copy > row_width)  in png_combine_row()
3479                bytes_to_copy = (unsigned int)/*SAFE*/row_width;  in png_combine_row()
3503                   if (row_width <= bytes_to_jump)  in png_combine_row()
3508                   row_width -= bytes_to_jump;  in png_combine_row()
3519                   if (row_width <= bytes_to_jump)  in png_combine_row()
3524                   row_width -= bytes_to_jump;  in png_combine_row()
3526                while (row_width > 1);  in png_combine_row()
3540                   if (row_width <= bytes_to_jump)  in png_combine_row()
3545                   row_width -= bytes_to_jump;  in png_combine_row()
3585                         if (row_width <= bytes_to_jump)  in png_combine_row()
3590                         row_width -= bytes_to_jump;  in png_combine_row()
3592                      while (bytes_to_copy <= row_width);  in png_combine_row()
3602                      while (--row_width > 0);  in png_combine_row()
3627                         if (row_width <= bytes_to_jump)  in png_combine_row()
3632                         row_width -= bytes_to_jump;  in png_combine_row()
3634                      while (bytes_to_copy <= row_width);  in png_combine_row()
3641                      while (--row_width > 0);  in png_combine_row()
3652                   if (row_width <= bytes_to_jump)  in png_combine_row()
3657                   row_width -= bytes_to_jump;  in png_combine_row()
3658                   if (bytes_to_copy > row_width)  in png_combine_row()
3659                      bytes_to_copy = (unsigned int)/*SAFE*/row_width;  in png_combine_row()
3675    memcpy(dp, sp, PNG_ROWBYTES(pixel_depth, row_width));  in png_combine_row()