31       png_debug(5, "writing extra chunks");  in write_unknown_chunks()
86    png_debug(1, "in png_write_info_before_PLTE");  in png_write_info_before_PLTE()
198    png_debug(1, "in png_write_info");  in png_write_info()
360    png_debug(1, "in png_write_end");  in png_write_end()
474    png_debug(1, "in png_convert_from_struct_tm");  in png_convert_from_struct_tm()
489    png_debug(1, "in png_convert_from_time_t");  in png_convert_from_time_t()
585    png_debug(1, "in png_write_rows");  in png_write_rows()
610    png_debug(1, "in png_write_image");  in png_write_image()
636    png_debug(1, "in png_do_write_intrapixel");  in png_do_write_intrapixel()
910    png_debug(1, "in png_set_flush");  in png_set_flush()
922    png_debug(1, "in png_write_flush");  in png_write_flush()
941    png_debug(1, "in png_write_destroy");  in png_write_destroy()
981    png_debug(1, "in png_destroy_write_struct");  in png_destroy_write_struct()
1002    png_debug(1, "in png_set_filter");  in png_set_filter()
1160    png_debug(1, "in png_set_compression_level");  in png_set_compression_level()
1171    png_debug(1, "in png_set_compression_mem_level");  in png_set_compression_mem_level()
1182    png_debug(1, "in png_set_compression_strategy");  in png_set_compression_strategy()
1226    png_debug(1, "in png_set_compression_method");  in png_set_compression_method()
1246    png_debug(1, "in png_set_text_compression_level");  in png_set_text_compression_level()
1257    png_debug(1, "in png_set_text_compression_mem_level");  in png_set_text_compression_mem_level()
1268    png_debug(1, "in png_set_text_compression_strategy");  in png_set_text_compression_strategy()
1303    png_debug(1, "in png_set_text_compression_method");  in png_set_text_compression_method()
1330    png_debug(1, "in png_set_write_user_transform_fn");  in png_set_write_user_transform_fn()