1364    else if (png_ptr->num_trans > 0)  in png_image_format()
2114          png_ptr->num_trans > 0) /* alpha in input */ &&  in png_image_read_colormap()
2194             if (png_ptr->num_trans > 0)  in png_image_read_colormap()
2269             if (png_ptr->num_trans > 0)  in png_image_read_colormap()
2526                png_ptr->num_trans > 0) &&  in png_image_read_colormap()
2561                   png_ptr->num_trans > 0) &&  in png_image_read_colormap()
2574                   png_ptr->num_trans > 0)  in png_image_read_colormap()
2645                png_ptr->num_trans > 0)  in png_image_read_colormap()
2802             unsigned int num_trans = png_ptr->num_trans;  in png_image_read_colormap()  local
2803             png_const_bytep trans = num_trans > 0 ? png_ptr->trans_alpha : NULL;  in png_image_read_colormap()
2811                num_trans = 0;  in png_image_read_colormap()
2824                if (do_background != 0 && i < num_trans && trans[i] < 255)  in png_image_read_colormap()
2851                       i < num_trans ? trans[i] : 255U, P_FILE/*8-bit*/);  in png_image_read_colormap()
2868    if (expand_tRNS != 0 && png_ptr->num_trans > 0 &&  in png_image_read_colormap()