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<?php defined("SYSPATH") or die("No direct script access.");
/**
* Gallery - a web based photo album viewer and editor
* Copyright (C) 2000-2008 Bharat Mediratta
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
*/
/**
* This is the API for handling exif data.
*/
class exif_Core {
protected static $exif_keys;
public static function extract($item) {
// Only try to extract EXIF from photos
if ($item->is_photo() && $item->mime_type == "image/jpeg") {
require_once(MODPATH . "exif/lib/exif.php");
$exif_raw = read_exif_data_raw($item->file_path(), false);
if (isset($exif_raw['ValidEXIFData'])) {
foreach(self::_keys() as $field => $exifvar) {
if (isset($exif_raw[$exifvar[0]][$exifvar[1]])) {
$exif_key = ORM::factory("exif_key");
$exif_key->item_id = $item->id;
$exif_key->name = $field;
$exif_key->value = $exif_raw[$exifvar[0]][$exifvar[1]];
$exif_key->summary = $exifvar[3];
$exif_key->save();
}
}
}
$size = getimagesize($item->file_path(), $info);
if (is_array($info) && !empty($info["APP13"])) {
$iptc = iptcparse($info["APP13"]);
foreach (array("Keywords" => "2#025", "Caption" => "2#120") as $keyword => $iptc_key) {
if (!empty($iptc[$iptc_key])) {
$exif_key = ORM::factory("exif_key");
$exif_key->item_id = $item->id;
$exif_key->name = $keyword;
$exif_key->value = implode(" ", $iptc[$iptc_key]);
$exif_key->summary = false;
$exif_key->save();
}
}
}
}
}
public static function get($item, $summary=true) {
$exif = array();
$exif_key = ORM::factory("exif_key")
->where("item_id", $item->id);
if ($summary) {
$exif_key->where("summary", $summary);
}
$keys = $exif_key->find_all();
$definitions = self::_keys();
foreach ($keys as $key) {
$exif[] = array("caption" => $definitions[$key->name][2], "value" => $key->value);
}
return $exif;
}
private static function _keys() {
if (!isset(self::$exif_keys)) {
self::$exif_keys = array(
"Make" => array("IFD0", "Make", t("Camera Maker"), true),
"Model" => array("IFD0", "Model", t("Camera Model"), true),
"Aperture" => array("SubIFD", "FNumber", t("Aperture"), true),
"ColorSpace" => array("SubIFD", "ColorSpace", t("Color Space"), true),
"ExposureBias" => array("SubIFD", "ExposureBiasValue", t("Exposure Value"), true),
"ExposureProgram" => array("SubIFD", "ExposureProgram", t("Exposure Program"), true),
"Flash" => array("SubIFD", "Flash", t("Flash"), true),
"FocalLength" => array("SubIFD", "FocalLength", t("Focal Length"), true),
"ISO" => array("SubIFD", "ISOSpeedRatings", t("ISO"), true),
"MeteringMode" => array("SubIFD", "MeteringMode", t("Metering Mode"), true),
"ShutterSpeed" => array("SubIFD", "ShutterSpeedValue", t("Shutter Speed"), true),
"DateTime" => array("SubIFD", "DateTimeOriginal", t("Date/Time"), true),
"Copyright" => array("IFD0", "Copyright", t("Copyright"), false),
"ImageType" => array("IFD0", "ImageType", t("Image Type"), false),
"Orientation" => array("IFD0", "Orientation", t("Orientation"), false),
"ResolutionUnit" => array("IFD0", "ResolutionUnit", t("Resolution Unit"), false),
"xResolution" => array("IFD0", "xResolution", t("X Resolution"), false),
"yResolution" => array("IFD0", "yResolution", t("Y Resolution"), false),
"Compression" => array("IFD1", "Compression", t("Compression"), false),
"BrightnessValue" => array("SubIFD", "BrightnessValue", t("Brightness Value"), false),
"Contrast" => array("SubIFD", "Contrast", t("Contrast"), false),
"ExposureMode" => array("SubIFD", "ExposureMode", t("Exposure Mode"), false),
"FlashEnergy" => array("SubIFD", "FlashEnergy", t("Flash Energy"), false),
"Saturation" => array("SubIFD", "Saturation", t("Saturation"), false),
"SceneType" => array("SubIFD", "SceneType", t("Scene Type"), false),
"Sharpness" => array("SubIFD", "Sharpness", t("Sharpness"), false),
"SubjectDistance" => array("SubIFD", "SubjectDistance", t("Subject Distance"), false),
"Caption" => array("IPTC", "Caption", t("Caption"), false),
"Keywords" => array("IPTC", "Keywords", t("Keywords"), false)
);
}
return self::$exif_keys;
}
}
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