/components/com_jce/editor/tiny_mce/plugins/imgmanager_ext/classes/pel/PelEntryUndefined.php
PHP | 416 lines | 135 code | 52 blank | 229 comment | 13 complexity | cb16ef2d23f10d6ef21ff91d0821a2b0 MD5 | raw file
Possible License(s): LGPL-3.0, GPL-2.0, MIT, BSD-3-Clause, LGPL-2.1
- <?php
- /* PEL: PHP Exif Library. A library with support for reading and
- * writing all Exif headers in JPEG and TIFF images using PHP.
- *
- * Copyright (C) 2004, 2005 Martin Geisler.
- *
- * 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 in the file COPYING; if not, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301 USA
- */
- /* $Id$ */
- /**
- * Classes used to hold data for Exif tags of format undefined.
- *
- * This file contains the base class {@link PelEntryUndefined} and
- * the subclasses {@link PelEntryUserComment} which should be used
- * to manage the {@link PelTag::USER_COMMENT} tag, and {@link
- * PelEntryVersion} which is used to manage entries with version
- * information.
- *
- * @author Martin Geisler <mgeisler@users.sourceforge.net>
- * @version $Revision$
- * @date $Date$
- * @license http://www.gnu.org/licenses/gpl.html GNU General Public
- * License (GPL)
- * @package PEL
- */
- /**#@+ Required class definitions. */
- require_once('PelEntry.php');
- /**#@-*/
- /**
- * Class for holding data of any kind.
- *
- * This class can hold bytes of undefined format.
- *
- * @author Martin Geisler <mgeisler@users.sourceforge.net>
- * @package PEL
- */
- class PelEntryUndefined extends PelEntry {
- /**
- * Make a new PelEntry that can hold undefined data.
- *
- * @param PelTag the tag which this entry represents. This
- * should be one of the constants defined in {@link PelTag},
- * e.g., {@link PelTag::SCENE_TYPE}, {@link
- * PelTag::MAKER_NOTE} or any other tag with format {@link
- * PelFormat::UNDEFINED}.
- *
- * @param string the data that this entry will be holding. Since
- * the format is undefined, no checking will be done on the data.
- */
- function __construct($tag, $data = '') {
- $this->tag = $tag;
- $this->format = PelFormat::UNDEFINED;
- $this->setValue($data);
- }
- /**
- * Set the data of this undefined entry.
- *
- * @param string the data that this entry will be holding. Since
- * the format is undefined, no checking will be done on the data.
- */
- function setValue($data) {
- $this->components = strlen($data);
- $this->bytes = $data;
- }
- /**
- * Get the data of this undefined entry.
- *
- * @return string the data that this entry is holding.
- */
- function getValue() {
- return $this->bytes;
- }
- /**
- * Get the value of this entry as text.
- *
- * The value will be returned in a format suitable for presentation.
- *
- * @param boolean some values can be returned in a long or more
- * brief form, and this parameter controls that.
- *
- * @return string the value as text.
- */
- function getText($brief = false) {
- switch ($this->tag) {
- case PelTag::FILE_SOURCE:
- //CC (e->components, 1, v);
- switch (ord($this->bytes{0})) {
- case 0x03:
- return 'DSC';
- default:
- return sprintf('0x%02X', ord($this->bytes{0}));
- }
-
- case PelTag::SCENE_TYPE:
- //CC (e->components, 1, v);
- switch (ord($this->bytes{0})) {
- case 0x01:
- return 'Directly photographed';
- default:
- return sprintf('0x%02X', ord($this->bytes{0}));
- }
-
- case PelTag::COMPONENTS_CONFIGURATION:
- //CC (e->components, 4, v);
- $v = '';
- for ($i = 0; $i < 4; $i++) {
- switch (ord($this->bytes{$i})) {
- case 0:
- $v .= '-';
- break;
- case 1:
- $v .= 'Y';
- break;
- case 2:
- $v .= 'Cb';
- break;
- case 3:
- $v .= 'Cr';
- break;
- case 4:
- $v .= 'R';
- break;
- case 5:
- $v .= 'G';
- break;
- case 6:
- $v .= 'B';
- break;
- default:
- $v .= 'reserved';
- break;
- }
- if ($i < 3) $v .= ' ';
- }
- return $v;
- case PelTag::MAKER_NOTE:
- // TODO: handle maker notes.
- return $this->components . ' bytes unknown MakerNote data';
- default:
- return '(undefined)';
- }
- }
- }
- /**
- * Class for a user comment.
- *
- * This class is used to hold user comments, which can come in several
- * different character encodings. The Exif standard specifies a
- * certain format of the {@link PelTag::USER_COMMENT user comment
- * tag}, and this class will make sure that the format is kept.
- *
- * The most basic use of this class simply stores an ASCII encoded
- * string for later retrieval using {@link getValue}:
- *
- * <code>
- * $entry = new PelEntryUserComment('An ASCII string');
- * echo $entry->getValue();
- * </code>
- *
- * The string can be encoded with a different encoding, and if so, the
- * encoding must be given using the second argument. The Exif
- * standard specifies three known encodings: 'ASCII', 'JIS', and
- * 'Unicode'. If the user comment is encoded using a character
- * encoding different from the tree known encodings, then the empty
- * string should be passed as encoding, thereby specifying that the
- * encoding is undefined.
- *
- * @author Martin Geisler <mgeisler@users.sourceforge.net>
- * @package PEL
- */
- class PelEntryUserComment extends PelEntryUndefined {
- /**
- * The user comment.
- *
- * @var string
- */
- private $comment;
- /**
- * The encoding.
- *
- * This should be one of 'ASCII', 'JIS', 'Unicode', or ''.
- *
- * @var string
- */
- private $encoding;
- /**
- * Make a new entry for holding a user comment.
- *
- * @param string the new user comment.
- *
- * @param string the encoding of the comment. This should be either
- * 'ASCII', 'JIS', 'Unicode', or the empty string specifying an
- * undefined encoding.
- */
- function __construct($comment = '', $encoding = 'ASCII') {
- parent::__construct(PelTag::USER_COMMENT);
- $this->setValue($comment, $encoding);
- }
-
- /**
- * Set the user comment.
- *
- * @param string the new user comment.
- *
- * @param string the encoding of the comment. This should be either
- * 'ASCII', 'JIS', 'Unicode', or the empty string specifying an
- * unknown encoding.
- */
- function setValue($comment = '', $encoding = 'ASCII') {
- $this->comment = $comment;
- $this->encoding = $encoding;
- parent::setValue(str_pad($encoding, 8, chr(0)) . $comment);
- }
- /**
- * Returns the user comment.
- *
- * The comment is returned with the same character encoding as when
- * it was set using {@link setValue} or {@link __construct the
- * constructor}.
- *
- * @return string the user comment.
- */
- function getValue() {
- return $this->comment;
- }
- /**
- * Returns the encoding.
- *
- * @return string the encoding of the user comment.
- */
- function getEncoding() {
- return $this->encoding;
- }
- /**
- * Returns the user comment.
- *
- * @return string the user comment.
- */
- function getText($brief = false) {
- return $this->comment;
- }
- }
- /**
- * Class to hold version information.
- *
- * There are three Exif entries that hold version information: the
- * {@link PelTag::EXIF_VERSION}, {@link
- * PelTag::FLASH_PIX_VERSION}, and {@link
- * PelTag::INTEROPERABILITY_VERSION} tags. This class manages
- * those tags.
- *
- * The class is used in a very straight-forward way:
- * <code>
- * $entry = new PelEntryVersion(PelTag::EXIF_VERSION, 2.2);
- * </code>
- * This creates an entry for an file complying to the Exif 2.2
- * standard. It is easy to test for standards level of an unknown
- * entry:
- * <code>
- * if ($entry->getTag() == PelTag::EXIF_VERSION &&
- * $entry->getValue() > 2.0) {
- * echo 'Recent Exif version.';
- * }
- * </code>
- *
- * @author Martin Geisler <mgeisler@users.sourceforge.net>
- * @package PEL
- */
- class PelEntryVersion extends PelEntryUndefined {
- /**
- * The version held by this entry.
- *
- * @var float
- */
- private $version;
- /**
- * Make a new entry for holding a version.
- *
- * @param PelTag the tag. This should be one of {@link
- * PelTag::EXIF_VERSION}, {@link PelTag::FLASH_PIX_VERSION},
- * or {@link PelTag::INTEROPERABILITY_VERSION}.
- *
- * @param float the version. The size of the entries leave room for
- * exactly four digits: two digits on either side of the decimal
- * point.
- */
- function __construct($tag, $version = 0.0) {
- parent::__construct($tag);
- $this->setValue($version);
- }
- /**
- * Set the version held by this entry.
- *
- * @param float the version. The size of the entries leave room for
- * exactly four digits: two digits on either side of the decimal
- * point.
- */
- function setValue($version = 0.0) {
- $this->version = $version;
- $major = floor($version);
- $minor = ($version - $major)*100;
- parent::setValue(sprintf('%02.0f%02.0f', $major, $minor));
- }
- /**
- * Return the version held by this entry.
- *
- * @return float the version. This will be the same as the value
- * given to {@link setValue} or {@link __construct the
- * constructor}.
- */
- function getValue() {
- return $this->version;
- }
-
- /**
- * Return a text string with the version.
- *
- * @param boolean controls if the output should be brief. Brief
- * output omits the word 'Version' so the result is just 'Exif x.y'
- * instead of 'Exif Version x.y' if the entry holds information
- * about the Exif version --- the output for FlashPix is similar.
- *
- * @return string the version number with the type of the tag,
- * either 'Exif' or 'FlashPix'.
- */
- function getText($brief = false) {
- $v = $this->version;
- /* Versions numbers like 2.0 would be output as just 2 if we don't
- * add the '.0' ourselves. */
- if (floor($this->version) == $this->version)
- $v .= '.0';
- switch ($this->tag) {
- case PelTag::EXIF_VERSION:
- if ($brief)
- return Pel::fmt('Exif %s', $v);
- else
- return Pel::fmt('Exif Version %s', $v);
-
- case PelTag::FLASH_PIX_VERSION:
- if ($brief)
- return Pel::fmt('FlashPix %s', $v);
- else
- return Pel::fmt('FlashPix Version %s', $v);
-
- case PelTag::INTEROPERABILITY_VERSION:
- if ($brief)
- return Pel::fmt('Interoperability %s', $v);
- else
- return Pel::fmt('Interoperability Version %s', $v);
- }
- if ($brief)
- return $v;
- else
- return Pel::fmt('Version %s', $v);
-
- }
- }
- ?>