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Mods & Plugins (Requests & Discussions) / Managing IPTC data and write it into copied images
« on: May 20, 2009, 01:17:29 AM »
Hi,
I'm using different mods which are all work fine in 4images 1.7.6 (e.g. IPTC V.1.7.6 Suchfelder erweiterung by Rembrandt or [MOD] Batch Copy/Move/Edit Images by V@no) and are a BIG help (thank you guys!).
What is missing is a mod or plugin for writing iptc data created with 4images INTO images (also automatically into cropped od copied images). Right now all modifications of metadata are written into the database, which works fine for all the images stored within 4images. But if you download one or more images that was purely keyworded in 4images it has no metadata in it. Thats a pitty. I know that GD Library by default deletes all metadata when cropping an image or creating thumbnails. But there should be a possibility to write these database entries into jpg via php.
I looked into the net and found at http://de.php.net/function.iptcembed :
As you see this code works with GD Library which is already part of 4images. Fine. My programming knowledge is less. Not fine. Maybe someone has better php knowledge than me and can create such mod.
- Oblaten
I'm using different mods which are all work fine in 4images 1.7.6 (e.g. IPTC V.1.7.6 Suchfelder erweiterung by Rembrandt or [MOD] Batch Copy/Move/Edit Images by V@no) and are a BIG help (thank you guys!).
What is missing is a mod or plugin for writing iptc data created with 4images INTO images (also automatically into cropped od copied images). Right now all modifications of metadata are written into the database, which works fine for all the images stored within 4images. But if you download one or more images that was purely keyworded in 4images it has no metadata in it. Thats a pitty. I know that GD Library by default deletes all metadata when cropping an image or creating thumbnails. But there should be a possibility to write these database entries into jpg via php.
I looked into the net and found at http://de.php.net/function.iptcembed :
Code: [Select]
<?
/************************************************************\
IPTC EASY 1.0 - IPTC data manipulator for JPEG images
All reserved www.image-host-script.com
Sep 15, 2008
\************************************************************/
DEFINE('IPTC_OBJECT_NAME', '005');
DEFINE('IPTC_EDIT_STATUS', '007');
DEFINE('IPTC_PRIORITY', '010');
DEFINE('IPTC_CATEGORY', '015');
DEFINE('IPTC_SUPPLEMENTAL_CATEGORY', '020');
DEFINE('IPTC_FIXTURE_IDENTIFIER', '022');
DEFINE('IPTC_KEYWORDS', '025');
DEFINE('IPTC_RELEASE_DATE', '030');
DEFINE('IPTC_RELEASE_TIME', '035');
DEFINE('IPTC_SPECIAL_INSTRUCTIONS', '040');
DEFINE('IPTC_REFERENCE_SERVICE', '045');
DEFINE('IPTC_REFERENCE_DATE', '047');
DEFINE('IPTC_REFERENCE_NUMBER', '050');
DEFINE('IPTC_CREATED_DATE', '055');
DEFINE('IPTC_CREATED_TIME', '060');
DEFINE('IPTC_ORIGINATING_PROGRAM', '065');
DEFINE('IPTC_PROGRAM_VERSION', '070');
DEFINE('IPTC_OBJECT_CYCLE', '075');
DEFINE('IPTC_BYLINE', '080');
DEFINE('IPTC_BYLINE_TITLE', '085');
DEFINE('IPTC_CITY', '090');
DEFINE('IPTC_PROVINCE_STATE', '095');
DEFINE('IPTC_COUNTRY_CODE', '100');
DEFINE('IPTC_COUNTRY', '101');
DEFINE('IPTC_ORIGINAL_TRANSMISSION_REFERENCE', '103');
DEFINE('IPTC_HEADLINE', '105');
DEFINE('IPTC_CREDIT', '110');
DEFINE('IPTC_SOURCE', '115');
DEFINE('IPTC_COPYRIGHT_STRING', '116');
DEFINE('IPTC_CAPTION', '120');
DEFINE('IPTC_LOCAL_CAPTION', '121');
class iptc {
var $meta=Array();
var $hasmeta=false;
var $file=false;
function iptc($filename) {
$size = getimagesize($filename,$info);
$this->hasmeta = isset($info["APP13"]);
if($this->hasmeta)
$this->meta = iptcparse ($info["APP13"]);
$this->file = $filename;
}
function set($tag, $data) {
$this->meta ["2#$tag"]= Array( $data );
$this->hasmeta=true;
}
function get($tag) {
return isset($this->meta["2#$tag"]) ? $this->meta["2#$tag"][0] : false;
}
function dump() {
print_r($this->meta);
}
function binary() {
$iptc_new = '';
foreach (array_keys($this->meta) as $s) {
$tag = str_replace("2#", "", $s);
$iptc_new .= $this->iptc_maketag(2, $tag, $this->meta[$s][0]);
}
return $iptc_new;
}
function iptc_maketag($rec,$dat,$val) {
$len = strlen($val);
if ($len < 0x8000) {
return chr(0x1c).chr($rec).chr($dat).
chr($len >> 8).
chr($len & 0xff).
$val;
} else {
return chr(0x1c).chr($rec).chr($dat).
chr(0x80).chr(0x04).
chr(($len >> 24) & 0xff).
chr(($len >> 16) & 0xff).
chr(($len >> 8 ) & 0xff).
chr(($len ) & 0xff).
$val;
}
}
function write() {
if(!function_exists('iptcembed')) return false;
$mode = 0;
$content = iptcembed($this->binary(), $this->file, $mode);
$filename = $this->file;
@unlink($filename); #delete if exists
$fp = fopen($filename, "w");
fwrite($fp, $content);
fclose($fp);
}
#requires GD library installed
function removeAllTags() {
$this->hasmeta=false;
$this->meta=Array();
$img = imagecreatefromstring(implode(file($this->file)));
@unlink($this->file); #delete if exists
imagejpeg($img,$this->file,100);
}
};
?>
Example read copyright string:
$i = new iptc("test.jpg");
echo $i->get(IPTC_COPYRIGHT_STRING);
Update copyright statement:
$i = new iptc("test.jpg");
echo $i->set(IPTC_COPYRIGHT_STRING,"Here goes the new data");
$i->write();
NOTE1: Data may be anything, even a binary file. I have so far tested and embedded an MS-Excel file directly to jpeg and it worked just perfect.
NOTE2: The writing purpose, it uses GD Library.
As you see this code works with GD Library which is already part of 4images. Fine. My programming knowledge is less. Not fine. Maybe someone has better php knowledge than me and can create such mod.
- Oblaten