+#if defined(PNG_TEXT_SUPPORTED)
+ {
+ png_textp text_ptr;
+ int num_text;
+
+ if (png_get_text(read_ptr, end_info_ptr, &text_ptr, &num_text) > 0)
+ {
+ png_debug1(0, "Handling %d iTXt/tEXt/zTXt chunks\n", num_text);
+ png_set_text(write_ptr, write_end_info_ptr, text_ptr, num_text);
+ }
+ }
+#endif
+#if defined(PNG_tIME_SUPPORTED)
+ {
+ png_timep mod_time;
+
+ if (png_get_tIME(read_ptr, end_info_ptr, &mod_time))
+ {
+ png_set_tIME(write_ptr, write_end_info_ptr, mod_time);
+#if defined(PNG_TIME_RFC1123_SUPPORTED)
+ /* we have to use png_strcpy instead of "=" because the string
+ pointed to by png_convert_to_rfc1123() gets free'ed before
+ we use it */
+ png_strcpy(tIME_string,png_convert_to_rfc1123(read_ptr, mod_time));
+ tIME_chunk_present++;
+#endif /* PNG_TIME_RFC1123_SUPPORTED */
+ }
+ }
+#endif
+#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED)
+ {
+ png_unknown_chunkp unknowns;
+ int num_unknowns;
+ num_unknowns = (int)png_get_unknown_chunks(read_ptr, end_info_ptr,
+ &unknowns);
+ if (num_unknowns)
+ {
+ png_size_t i;
+ png_set_unknown_chunks(write_ptr, write_end_info_ptr, unknowns,
+ num_unknowns);
+ /* copy the locations from the read_info_ptr. The automatically
+ generated locations in write_end_info_ptr are wrong because we
+ haven't written the end_info yet */
+ for (i = 0; i < (png_size_t)num_unknowns; i++)
+ png_set_unknown_chunk_location(write_ptr, write_end_info_ptr, i,
+ unknowns[i].location);
+ }
+ }
+#endif
+#ifdef PNG_WRITE_SUPPORTED
+ png_write_end(write_ptr, write_end_info_ptr);
+#endif
+