3184    png_alloc_size_t row_width = png_ptr->width;  in png_combine_row()  local
3203           PNG_ROWBYTES(pixel_depth, row_width))  in png_combine_row()
3207    if (row_width == 0)  in png_combine_row()
3214    end_mask = (pixel_depth * row_width) & 7;  in png_combine_row()
3218       end_ptr = dp + PNG_ROWBYTES(pixel_depth, row_width) - 1;  in png_combine_row()
3247       if (row_width <= PNG_PASS_START_COL(pass))  in png_combine_row()
3416             if (row_width <= pixels_per_byte)  in png_combine_row()
3419             row_width -= pixels_per_byte;  in png_combine_row()
3434          row_width *= pixel_depth;  in png_combine_row()
3443             row_width -= offset;  in png_combine_row()
3458             if (bytes_to_copy > row_width)  in png_combine_row()
3459                bytes_to_copy = (unsigned int)/*SAFE*/row_width;  in png_combine_row()
3483                   if (row_width <= bytes_to_jump)  in png_combine_row()
3488                   row_width -= bytes_to_jump;  in png_combine_row()
3499                   if (row_width <= bytes_to_jump)  in png_combine_row()
3504                   row_width -= bytes_to_jump;  in png_combine_row()
3506                while (row_width > 1);  in png_combine_row()
3520                   if (row_width <= bytes_to_jump)  in png_combine_row()
3525                   row_width -= bytes_to_jump;  in png_combine_row()
3565                         if (row_width <= bytes_to_jump)  in png_combine_row()
3570                         row_width -= bytes_to_jump;  in png_combine_row()
3572                      while (bytes_to_copy <= row_width);  in png_combine_row()
3582                      while (--row_width > 0);  in png_combine_row()
3607                         if (row_width <= bytes_to_jump)  in png_combine_row()
3612                         row_width -= bytes_to_jump;  in png_combine_row()
3614                      while (bytes_to_copy <= row_width);  in png_combine_row()
3621                      while (--row_width > 0);  in png_combine_row()
3632                   if (row_width <= bytes_to_jump)  in png_combine_row()
3637                   row_width -= bytes_to_jump;  in png_combine_row()
3638                   if (bytes_to_copy > row_width)  in png_combine_row()
3639                      bytes_to_copy = (unsigned int)/*SAFE*/row_width;  in png_combine_row()
3655    memcpy(dp, sp, PNG_ROWBYTES(pixel_depth, row_width));  in png_combine_row()