3001    png_uint_32 row_width = png_ptr->width;  in png_combine_row()  local
3020           PNG_ROWBYTES(pixel_depth, row_width))  in png_combine_row()
3024    if (row_width == 0)  in png_combine_row()
3031    end_mask = (pixel_depth * row_width) & 7;  in png_combine_row()
3035       end_ptr = dp + PNG_ROWBYTES(pixel_depth, row_width) - 1;  in png_combine_row()
3062       if (row_width <= PNG_PASS_START_COL(pass))  in png_combine_row()
3231             if (row_width <= pixels_per_byte)  in png_combine_row()
3234             row_width -= pixels_per_byte;  in png_combine_row()
3249          row_width *= pixel_depth;  in png_combine_row()
3258             row_width -= offset;  in png_combine_row()
3273             if (bytes_to_copy > row_width)  in png_combine_row()
3274                bytes_to_copy = row_width;  in png_combine_row()
3298                   if (row_width <= bytes_to_jump)  in png_combine_row()
3303                   row_width -= bytes_to_jump;  in png_combine_row()
3314                   if (row_width <= bytes_to_jump)  in png_combine_row()
3319                   row_width -= bytes_to_jump;  in png_combine_row()
3321                while (row_width > 1);  in png_combine_row()
3335                   if (row_width <= bytes_to_jump)  in png_combine_row()
3340                   row_width -= bytes_to_jump;  in png_combine_row()
3380                         if (row_width <= bytes_to_jump)  in png_combine_row()
3385                         row_width -= bytes_to_jump;  in png_combine_row()
3387                      while (bytes_to_copy <= row_width);  in png_combine_row()
3397                      while (--row_width > 0);  in png_combine_row()
3422                         if (row_width <= bytes_to_jump)  in png_combine_row()
3427                         row_width -= bytes_to_jump;  in png_combine_row()
3429                      while (bytes_to_copy <= row_width);  in png_combine_row()
3436                      while (--row_width > 0);  in png_combine_row()
3447                   if (row_width <= bytes_to_jump)  in png_combine_row()
3452                   row_width -= bytes_to_jump;  in png_combine_row()
3453                   if (bytes_to_copy > row_width)  in png_combine_row()
3454                      bytes_to_copy = row_width;  in png_combine_row()
3470    memcpy(dp, sp, PNG_ROWBYTES(pixel_depth, row_width));  in png_combine_row()