3061    png_alloc_size_t row_width = png_ptr->width;  in png_combine_row()  local
3080           PNG_ROWBYTES(pixel_depth, row_width))  in png_combine_row()
3084    if (row_width == 0)  in png_combine_row()
3091    end_mask = (pixel_depth * row_width) & 7;  in png_combine_row()
3095       end_ptr = dp + PNG_ROWBYTES(pixel_depth, row_width) - 1;  in png_combine_row()
3124       if (row_width <= PNG_PASS_START_COL(pass))  in png_combine_row()
3293             if (row_width <= pixels_per_byte)  in png_combine_row()
3296             row_width -= pixels_per_byte;  in png_combine_row()
3311          row_width *= pixel_depth;  in png_combine_row()
3320             row_width -= offset;  in png_combine_row()
3335             if (bytes_to_copy > row_width)  in png_combine_row()
3336                bytes_to_copy = (unsigned int)/*SAFE*/row_width;  in png_combine_row()
3360                   if (row_width <= bytes_to_jump)  in png_combine_row()
3365                   row_width -= bytes_to_jump;  in png_combine_row()
3376                   if (row_width <= bytes_to_jump)  in png_combine_row()
3381                   row_width -= bytes_to_jump;  in png_combine_row()
3383                while (row_width > 1);  in png_combine_row()
3397                   if (row_width <= bytes_to_jump)  in png_combine_row()
3402                   row_width -= bytes_to_jump;  in png_combine_row()
3442                         if (row_width <= bytes_to_jump)  in png_combine_row()
3447                         row_width -= bytes_to_jump;  in png_combine_row()
3449                      while (bytes_to_copy <= row_width);  in png_combine_row()
3459                      while (--row_width > 0);  in png_combine_row()
3484                         if (row_width <= bytes_to_jump)  in png_combine_row()
3489                         row_width -= bytes_to_jump;  in png_combine_row()
3491                      while (bytes_to_copy <= row_width);  in png_combine_row()
3498                      while (--row_width > 0);  in png_combine_row()
3509                   if (row_width <= bytes_to_jump)  in png_combine_row()
3514                   row_width -= bytes_to_jump;  in png_combine_row()
3515                   if (bytes_to_copy > row_width)  in png_combine_row()
3516                      bytes_to_copy = (unsigned int)/*SAFE*/row_width;  in png_combine_row()
3532    memcpy(dp, sp, PNG_ROWBYTES(pixel_depth, row_width));  in png_combine_row()