407    png_structp      read_pp;  member
494    dp->read_pp = NULL;  in display_init()
508    if (dp->read_pp != NULL)  in display_clean_read()
509       png_destroy_read_struct(&dp->read_pp, NULL, NULL);  in display_clean_read()
1751    dp->read_pp = png_create_read_struct(PNG_LIBPNG_VER_STRING, dp,  in read_png()
1753    if (dp->read_pp == NULL)  in read_png()
1757       png_set_benign_errors(dp->read_pp, 1/*allowed*/);  in read_png()
1762          png_set_check_for_invalid_index(dp->read_pp, 1/*on, no warning*/);  in read_png()
1769          png_set_check_for_invalid_index(dp->read_pp, -1/*off completely*/);  in read_png()
1775    dp->ip = png_create_info_struct(dp->read_pp);  in read_png()
1777       png_error(dp->read_pp, "failed to create info struct");  in read_png()
1780    png_set_read_fn(dp->read_pp, dp, read_function);  in read_png()
1783       png_set_keep_unknown_chunks(dp->read_pp, PNG_HANDLE_CHUNK_ALWAYS, NULL,  in read_png()
1789       png_set_user_limits(dp->read_pp, 0x7fffffff, 0x7fffffff);  in read_png()
1794    png_read_png(dp->read_pp, dp->ip, 0U/*transforms*/, NULL/*params*/);  in read_png()
1796    dp->w = png_get_image_width(dp->read_pp, dp->ip);  in read_png()
1797    dp->h = png_get_image_height(dp->read_pp, dp->ip);  in read_png()
1798    dp->ct = png_get_color_type(dp->read_pp, dp->ip);  in read_png()
1799    dp->bpp = png_get_bit_depth(dp->read_pp, dp->ip) *  in read_png()
1800              png_get_channels(dp->read_pp, dp->ip);  in read_png()
1806       png_alloc_size_t rb = png_get_rowbytes(dp->read_pp, dp->ip);  in read_png()
1809          png_error(dp->read_pp, "invalid row byte count from libpng");  in read_png()
1813          png_error(dp->read_pp, "image too large");  in read_png()
1821       int max = png_get_palette_max(dp->read_pp, dp->ip);  in read_png()
1825       if (png_get_PLTE(dp->read_pp, dp->ip, &palette, &num) != PNG_INFO_PLTE  in read_png()
1846          png_set_PLTE(dp->read_pp, dp->ip, newpal, i);  in read_png()