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dokuwiki/inc/JpegMeta.php

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<?php
/**
* JPEG metadata reader/writer
*
* @license BSD <http://www.opensource.org/licenses/bsd-license.php>
* @link http://github.com/sd/jpeg-php
* @author Sebastian Delmont <sdelmont@zonageek.com>
* @author Andreas Gohr <andi@splitbrain.org>
* @author Hakan Sandell <hakan.sandell@mydata.se>
* @todo Add support for Maker Notes, Extend for GIF and PNG metadata
*/
// Original copyright notice:
//
// Copyright (c) 2003 Sebastian Delmont <sdelmont@zonageek.com>
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. Neither the name of the author nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
class JpegMeta {
var $_fileName;
var $_fp = null;
var $_fpout = null;
var $_type = 'unknown';
var $_markers;
var $_info;
/**
* Constructor
*
* @author Sebastian Delmont <sdelmont@zonageek.com>
*
* @param $fileName
*/
function __construct($fileName) {
$this->_fileName = $fileName;
$this->_fp = null;
$this->_type = 'unknown';
unset($this->_info);
unset($this->_markers);
}
/**
* Returns all gathered info as multidim array
*
* @author Sebastian Delmont <sdelmont@zonageek.com>
*/
function & getRawInfo() {
$this->_parseAll();
if ($this->_markers == null) {
return false;
}
return $this->_info;
}
/**
* Returns basic image info
*
* @author Sebastian Delmont <sdelmont@zonageek.com>
*/
function & getBasicInfo() {
$this->_parseAll();
$info = array();
if ($this->_markers == null) {
return false;
}
$info['Name'] = $this->_info['file']['Name'];
if (isset($this->_info['file']['Url'])) {
$info['Url'] = $this->_info['file']['Url'];
$info['NiceSize'] = "???KB";
} else {
$info['Size'] = $this->_info['file']['Size'];
$info['NiceSize'] = $this->_info['file']['NiceSize'];
}
if (@isset($this->_info['sof']['Format'])) {
$info['Format'] = $this->_info['sof']['Format'] . " JPEG";
} else {
$info['Format'] = $this->_info['sof']['Format'] . " JPEG";
}
if (@isset($this->_info['sof']['ColorChannels'])) {
$info['ColorMode'] = ($this->_info['sof']['ColorChannels'] > 1) ? "Color" : "B&W";
}
$info['Width'] = $this->getWidth();
$info['Height'] = $this->getHeight();
$info['DimStr'] = $this->getDimStr();
$dates = $this->getDates();
$info['DateTime'] = $dates['EarliestTime'];
$info['DateTimeStr'] = $dates['EarliestTimeStr'];
$info['HasThumbnail'] = $this->hasThumbnail();
return $info;
}
/**
* Convinience function to access nearly all available Data
* through one function
*
* @author Andreas Gohr <andi@splitbrain.org>
*
* @param array|string $fields field name or array with field names
* @return bool|string
*/
function getField($fields) {
if(!is_array($fields)) $fields = array($fields);
$info = false;
foreach($fields as $field){
$lower_field = strtolower($field);
if(str_starts_with($lower_field, 'iptc.')){
$info = $this->getIPTCField(substr($field,5));
}elseif(str_starts_with($lower_field, 'exif.')){
$info = $this->getExifField(substr($field,5));
}elseif(str_starts_with($lower_field, 'xmp.')){
$info = $this->getXmpField(substr($field,4));
}elseif(str_starts_with($lower_field, 'file.')){
$info = $this->getFileField(substr($field,5));
}elseif(str_starts_with($lower_field, 'date.')){
$info = $this->getDateField(substr($field,5));
}elseif($lower_field == 'simple.camera'){
$info = $this->getCamera();
}elseif($lower_field == 'simple.raw'){
return $this->getRawInfo();
}elseif($lower_field == 'simple.title'){
$info = $this->getTitle();
}elseif($lower_field == 'simple.shutterspeed'){
$info = $this->getShutterSpeed();
}else{
$info = $this->getExifField($field);
}
if($info != false) break;
}
if($info === false) $info = '';
if(is_array($info)){
if(isset($info['val'])){
$info = $info['val'];
}else{
$arr = array();
foreach($info as $part){
if(is_array($part)){
if(isset($part['val'])){
$arr[] = $part['val'];
}else{
$arr[] = join(', ',$part);
}
}else{
$arr[] = $part;
}
}
$info = join(', ',$arr);
}
}
return trim($info);
}
/**
* Convinience function to set nearly all available Data
* through one function
*
* @author Andreas Gohr <andi@splitbrain.org>
*
* @param string $field field name
* @param string $value
* @return bool success or fail
*/
function setField($field, $value) {
$lower_field = strtolower($field);
if(str_starts_with($lower_field, 'iptc.')){
return $this->setIPTCField(substr($field,5),$value);
}elseif(str_starts_with($lower_field, 'exif.')){
return $this->setExifField(substr($field,5),$value);
}else{
return $this->setExifField($field,$value);
}
}
/**
* Convinience function to delete nearly all available Data
* through one function
*
* @author Andreas Gohr <andi@splitbrain.org>
*
* @param string $field field name
* @return bool
*/
function deleteField($field) {
$lower_field = strtolower($field);
if(str_starts_with($lower_field, 'iptc.')){
return $this->deleteIPTCField(substr($field,5));
}elseif(str_starts_with($lower_field, 'exif.')){
return $this->deleteExifField(substr($field,5));
}else{
return $this->deleteExifField($field);
}
}
/**
* Return a date field
*
* @author Andreas Gohr <andi@splitbrain.org>
*
* @param string $field
* @return false|string
*/
function getDateField($field) {
if (!isset($this->_info['dates'])) {
$this->_info['dates'] = $this->getDates();
}
if (isset($this->_info['dates'][$field])) {
return $this->_info['dates'][$field];
}
return false;
}
/**
* Return a file info field
*
* @author Andreas Gohr <andi@splitbrain.org>
*
* @param string $field field name
* @return false|string
*/
function getFileField($field) {
if (!isset($this->_info['file'])) {
$this->_parseFileInfo();
}
if (isset($this->_info['file'][$field])) {
return $this->_info['file'][$field];
}
return false;
}
/**
* Return the camera info (Maker and Model)
*
* @author Andreas Gohr <andi@splitbrain.org>
* @todo handle makernotes
*
* @return false|string
*/
function getCamera(){
$make = $this->getField(array('Exif.Make','Exif.TIFFMake'));
$model = $this->getField(array('Exif.Model','Exif.TIFFModel'));
$cam = trim("$make $model");
if(empty($cam)) return false;
return $cam;
}
/**
* Return shutter speed as a ratio
*
* @author Joe Lapp <joe.lapp@pobox.com>
*
* @return string
*/
function getShutterSpeed() {
if (!isset($this->_info['exif'])) {
$this->_parseMarkerExif();
}
if(!isset($this->_info['exif']['ExposureTime'])){
return '';
}
$field = $this->_info['exif']['ExposureTime'];
if($field['den'] == 1) return $field['num'];
return $field['num'].'/'.$field['den'];
}
/**
* Return an EXIF field
*
* @author Sebastian Delmont <sdelmont@zonageek.com>
*
* @param string $field field name
* @return false|string
*/
function getExifField($field) {
if (!isset($this->_info['exif'])) {
$this->_parseMarkerExif();
}
if ($this->_markers == null) {
return false;
}
if (isset($this->_info['exif'][$field])) {
return $this->_info['exif'][$field];
}
return false;
}
/**
* Return an XMP field
*
* @author Hakan Sandell <hakan.sandell@mydata.se>
*
* @param string $field field name
* @return false|string
*/
function getXmpField($field) {
if (!isset($this->_info['xmp'])) {
$this->_parseMarkerXmp();
}
if ($this->_markers == null) {
return false;
}
if (isset($this->_info['xmp'][$field])) {
return $this->_info['xmp'][$field];
}
return false;
}
/**
* Return an Adobe Field
*
* @author Sebastian Delmont <sdelmont@zonageek.com>
*
* @param string $field field name
* @return false|string
*/
function getAdobeField($field) {
if (!isset($this->_info['adobe'])) {
$this->_parseMarkerAdobe();
}
if ($this->_markers == null) {
return false;
}
if (isset($this->_info['adobe'][$field])) {
return $this->_info['adobe'][$field];
}
return false;
}
/**
* Return an IPTC field
*
* @author Sebastian Delmont <sdelmont@zonageek.com>
*
* @param string $field field name
* @return false|string
*/
function getIPTCField($field) {
if (!isset($this->_info['iptc'])) {
$this->_parseMarkerAdobe();
}
if ($this->_markers == null) {
return false;
}
if (isset($this->_info['iptc'][$field])) {
return $this->_info['iptc'][$field];
}
return false;
}
/**
* Set an EXIF field
*
* @author Sebastian Delmont <sdelmont@zonageek.com>
* @author Joe Lapp <joe.lapp@pobox.com>
*
* @param string $field field name
* @param string $value
* @return bool
*/
function setExifField($field, $value) {
if (!isset($this->_info['exif'])) {
$this->_parseMarkerExif();
}
if ($this->_markers == null) {
return false;
}
if ($this->_info['exif'] == false) {
$this->_info['exif'] = array();
}
// make sure datetimes are in correct format
if(strlen($field) >= 8 && str_starts_with(strtolower($field), 'datetime')) {
if(strlen($value) < 8 || $value[4] != ':' || $value[7] != ':') {
$value = date('Y:m:d H:i:s', strtotime($value));
}
}
$this->_info['exif'][$field] = $value;
return true;
}
/**
* Set an Adobe Field
*
* @author Sebastian Delmont <sdelmont@zonageek.com>
*
* @param string $field field name
* @param string $value
* @return bool
*/
function setAdobeField($field, $value) {
if (!isset($this->_info['adobe'])) {
$this->_parseMarkerAdobe();
}
if ($this->_markers == null) {
return false;
}
if ($this->_info['adobe'] == false) {
$this->_info['adobe'] = array();
}
$this->_info['adobe'][$field] = $value;
return true;
}
/**
* Calculates the multiplier needed to resize the image to the given
* dimensions
*
* @author Andreas Gohr <andi@splitbrain.org>
*
* @param int $maxwidth
* @param int $maxheight
* @return float|int
*/
function getResizeRatio($maxwidth,$maxheight=0){
if(!$maxheight) $maxheight = $maxwidth;
$w = $this->getField('File.Width');
$h = $this->getField('File.Height');
$ratio = 1;
if($w >= $h){
if($w >= $maxwidth){
$ratio = $maxwidth/$w;
}elseif($h > $maxheight){
$ratio = $maxheight/$h;
}
}else{
if($h >= $maxheight){
$ratio = $maxheight/$h;
}elseif($w > $maxwidth){
$ratio = $maxwidth/$w;
}
}
return $ratio;
}
/**
* Set an IPTC field
*
* @author Sebastian Delmont <sdelmont@zonageek.com>
*
* @param string $field field name
* @param string $value
* @return bool
*/
function setIPTCField($field, $value) {
if (!isset($this->_info['iptc'])) {
$this->_parseMarkerAdobe();
}
if ($this->_markers == null) {
return false;
}
if ($this->_info['iptc'] == false) {
$this->_info['iptc'] = array();
}
$this->_info['iptc'][$field] = $value;
return true;
}
/**
* Delete an EXIF field
*
* @author Sebastian Delmont <sdelmont@zonageek.com>
*
* @param string $field field name
* @return bool
*/
function deleteExifField($field) {
if (!isset($this->_info['exif'])) {
$this->_parseMarkerAdobe();
}
if ($this->_markers == null) {
return false;
}
if ($this->_info['exif'] != false) {
unset($this->_info['exif'][$field]);
}
return true;
}
/**
* Delete an Adobe field
*
* @author Sebastian Delmont <sdelmont@zonageek.com>
*
* @param string $field field name
* @return bool
*/
function deleteAdobeField($field) {
if (!isset($this->_info['adobe'])) {
$this->_parseMarkerAdobe();
}
if ($this->_markers == null) {
return false;
}
if ($this->_info['adobe'] != false) {
unset($this->_info['adobe'][$field]);
}
return true;
}
/**
* Delete an IPTC field
*
* @author Sebastian Delmont <sdelmont@zonageek.com>
*
* @param string $field field name
* @return bool
*/
function deleteIPTCField($field) {
if (!isset($this->_info['iptc'])) {
$this->_parseMarkerAdobe();
}
if ($this->_markers == null) {
return false;
}
if ($this->_info['iptc'] != false) {
unset($this->_info['iptc'][$field]);
}
return true;
}
/**
* Get the image's title, tries various fields
*
* @param int $max maximum number chars (keeps words)
* @return false|string
*
* @author Andreas Gohr <andi@splitbrain.org>
*/
function getTitle($max=80){
// try various fields
$cap = $this->getField(array('Iptc.Headline',
'Iptc.Caption',
'Xmp.dc:title',
'Exif.UserComment',
'Exif.TIFFUserComment',
'Exif.TIFFImageDescription',
'File.Name'));
if (empty($cap)) return false;
if(!$max) return $cap;
// Shorten to 80 chars (keeping words)
$new = preg_replace('/\n.+$/','',wordwrap($cap, $max));
if($new != $cap) $new .= '...';
return $new;
}
/**
* Gather various date fields
*
* @author Sebastian Delmont <sdelmont@zonageek.com>
*
* @return array|bool
*/
function getDates() {
$this->_parseAll();
if ($this->_markers == null) {
if (@isset($this->_info['file']['UnixTime'])) {
$dates = array();
$dates['FileModified'] = $this->_info['file']['UnixTime'];
$dates['Time'] = $this->_info['file']['UnixTime'];
$dates['TimeSource'] = 'FileModified';
$dates['TimeStr'] = date("Y-m-d H:i:s", $this->_info['file']['UnixTime']);
$dates['EarliestTime'] = $this->_info['file']['UnixTime'];
$dates['EarliestTimeSource'] = 'FileModified';
$dates['EarliestTimeStr'] = date("Y-m-d H:i:s", $this->_info['file']['UnixTime']);
$dates['LatestTime'] = $this->_info['file']['UnixTime'];
$dates['LatestTimeSource'] = 'FileModified';
$dates['LatestTimeStr'] = date("Y-m-d H:i:s", $this->_info['file']['UnixTime']);
return $dates;
}
return false;
}
$dates = array();
$latestTime = 0;
$latestTimeSource = "";
$earliestTime = time();
$earliestTimeSource = "";
if (@isset($this->_info['exif']['DateTime'])) {
$dates['ExifDateTime'] = $this->_info['exif']['DateTime'];
$aux = $this->_info['exif']['DateTime'];
$aux[4] = "-";
$aux[7] = "-";
$t = strtotime($aux);
if ($t && $t > $latestTime) {
$latestTime = $t;
$latestTimeSource = "ExifDateTime";
}
if ($t && $t < $earliestTime) {
$earliestTime = $t;
$earliestTimeSource = "ExifDateTime";
}
}
if (@isset($this->_info['exif']['DateTimeOriginal'])) {
$dates['ExifDateTimeOriginal'] = $this->_info['exif']['DateTimeOriginal'];
$aux = $this->_info['exif']['DateTimeOriginal'];
$aux[4] = "-";
$aux[7] = "-";
$t = strtotime($aux);
if ($t && $t > $latestTime) {
$latestTime = $t;
$latestTimeSource = "ExifDateTimeOriginal";
}
if ($t && $t < $earliestTime) {
$earliestTime = $t;
$earliestTimeSource = "ExifDateTimeOriginal";
}
}
if (@isset($this->_info['exif']['DateTimeDigitized'])) {
$dates['ExifDateTimeDigitized'] = $this->_info['exif']['DateTimeDigitized'];
$aux = $this->_info['exif']['DateTimeDigitized'];
$aux[4] = "-";
$aux[7] = "-";
$t = strtotime($aux);
if ($t && $t > $latestTime) {
$latestTime = $t;
$latestTimeSource = "ExifDateTimeDigitized";
}
if ($t && $t < $earliestTime) {
$earliestTime = $t;
$earliestTimeSource = "ExifDateTimeDigitized";
}
}
if (@isset($this->_info['iptc']['DateCreated'])) {
$dates['IPTCDateCreated'] = $this->_info['iptc']['DateCreated'];
$aux = $this->_info['iptc']['DateCreated'];
$aux = substr($aux, 0, 4) . "-" . substr($aux, 4, 2) . "-" . substr($aux, 6, 2);
$t = strtotime($aux);
if ($t && $t > $latestTime) {
$latestTime = $t;
$latestTimeSource = "IPTCDateCreated";
}
if ($t && $t < $earliestTime) {
$earliestTime = $t;
$earliestTimeSource = "IPTCDateCreated";
}
}
if (@isset($this->_info['file']['UnixTime'])) {
$dates['FileModified'] = $this->_info['file']['UnixTime'];
$t = $this->_info['file']['UnixTime'];
if ($t && $t > $latestTime) {
$latestTime = $t;
$latestTimeSource = "FileModified";
}
if ($t && $t < $earliestTime) {
$earliestTime = $t;
$earliestTimeSource = "FileModified";
}
}
$dates['Time'] = $earliestTime;
$dates['TimeSource'] = $earliestTimeSource;
$dates['TimeStr'] = date("Y-m-d H:i:s", $earliestTime);
$dates['EarliestTime'] = $earliestTime;
$dates['EarliestTimeSource'] = $earliestTimeSource;
$dates['EarliestTimeStr'] = date("Y-m-d H:i:s", $earliestTime);
$dates['LatestTime'] = $latestTime;
$dates['LatestTimeSource'] = $latestTimeSource;
$dates['LatestTimeStr'] = date("Y-m-d H:i:s", $latestTime);
return $dates;
}
/**
* Get the image width, tries various fields
*
* @author Sebastian Delmont <sdelmont@zonageek.com>
*
* @return false|string
*/
function getWidth() {
if (!isset($this->_info['sof'])) {
$this->_parseMarkerSOF();
}
if ($this->_markers == null) {
return false;
}
if (isset($this->_info['sof']['ImageWidth'])) {
return $this->_info['sof']['ImageWidth'];
}
if (!isset($this->_info['exif'])) {
$this->_parseMarkerExif();
}
if (isset($this->_info['exif']['PixelXDimension'])) {
return $this->_info['exif']['PixelXDimension'];
}
return false;
}
/**
* Get the image height, tries various fields
*
* @author Sebastian Delmont <sdelmont@zonageek.com>
*
* @return false|string
*/
function getHeight() {
if (!isset($this->_info['sof'])) {
$this->_parseMarkerSOF();
}
if ($this->_markers == null) {
return false;
}
if (isset($this->_info['sof']['ImageHeight'])) {
return $this->_info['sof']['ImageHeight'];
}
if (!isset($this->_info['exif'])) {
$this->_parseMarkerExif();
}
if (isset($this->_info['exif']['PixelYDimension'])) {
return $this->_info['exif']['PixelYDimension'];
}
return false;
}
/**
* Get an dimension string for use in img tag
*
* @author Sebastian Delmont <sdelmont@zonageek.com>
*
* @return false|string
*/
function getDimStr() {
if ($this->_markers == null) {
return false;
}
$w = $this->getWidth();
$h = $this->getHeight();
return "width='" . $w . "' height='" . $h . "'";
}
/**
* Checks for an embedded thumbnail
*
* @author Sebastian Delmont <sdelmont@zonageek.com>
*
* @param string $which possible values: 'any', 'exif' or 'adobe'
* @return false|string
*/
function hasThumbnail($which = 'any') {
if (($which == 'any') || ($which == 'exif')) {
if (!isset($this->_info['exif'])) {
$this->_parseMarkerExif();
}
if ($this->_markers == null) {
return false;
}
if (isset($this->_info['exif']) && is_array($this->_info['exif'])) {
if (isset($this->_info['exif']['JFIFThumbnail'])) {
return 'exif';
}
}
}
if ($which == 'adobe') {
if (!isset($this->_info['adobe'])) {
$this->_parseMarkerAdobe();
}
if ($this->_markers == null) {
return false;
}
if (isset($this->_info['adobe']) && is_array($this->_info['adobe'])) {
if (isset($this->_info['adobe']['ThumbnailData'])) {
return 'exif';
}
}
}
return false;
}
/**
* Send embedded thumbnail to browser
*
* @author Sebastian Delmont <sdelmont@zonageek.com>
*
* @param string $which possible values: 'any', 'exif' or 'adobe'
* @return bool
*/
function sendThumbnail($which = 'any') {
$data = null;
if (($which == 'any') || ($which == 'exif')) {
if (!isset($this->_info['exif'])) {
$this->_parseMarkerExif();
}
if ($this->_markers == null) {
return false;
}
if (isset($this->_info['exif']) && is_array($this->_info['exif'])) {
if (isset($this->_info['exif']['JFIFThumbnail'])) {
$data =& $this->_info['exif']['JFIFThumbnail'];
}
}
}
if (($which == 'adobe') || ($data == null)){
if (!isset($this->_info['adobe'])) {
$this->_parseMarkerAdobe();
}
if ($this->_markers == null) {
return false;
}
if (isset($this->_info['adobe']) && is_array($this->_info['adobe'])) {
if (isset($this->_info['adobe']['ThumbnailData'])) {
$data =& $this->_info['adobe']['ThumbnailData'];
}
}
}
if ($data != null) {
header("Content-type: image/jpeg");
echo $data;
return true;
}
return false;
}
/**
* Save changed Metadata
*
* @author Sebastian Delmont <sdelmont@zonageek.com>
* @author Andreas Gohr <andi@splitbrain.org>
*
* @param string $fileName file name or empty string for a random name
* @return bool
*/
function save($fileName = "") {
if ($fileName == "") {
$tmpName = tempnam(dirname($this->_fileName),'_metatemp_');
$this->_writeJPEG($tmpName);
if (file_exists($tmpName)) {
return io_rename($tmpName, $this->_fileName);
}
} else {
return $this->_writeJPEG($fileName);
}
return false;
}
/*************************************************************/
/* PRIVATE FUNCTIONS (Internal Use Only!) */
/*************************************************************/
/*************************************************************/
function _dispose($fileName = "") {
$this->_fileName = $fileName;
$this->_fp = null;
$this->_type = 'unknown';
unset($this->_markers);
unset($this->_info);
}
/*************************************************************/
function _readJPEG() {
unset($this->_markers);
//unset($this->_info);
$this->_markers = array();
//$this->_info = array();
$this->_fp = @fopen($this->_fileName, 'rb');
if ($this->_fp) {
if (file_exists($this->_fileName)) {
$this->_type = 'file';
}
else {
$this->_type = 'url';
}
} else {
$this->_fp = null;
return false; // ERROR: Can't open file
}
// Check for the JPEG signature
$c1 = ord(fgetc($this->_fp));
$c2 = ord(fgetc($this->_fp));
if ($c1 != 0xFF || $c2 != 0xD8) { // (0xFF + SOI)
$this->_markers = null;
return false; // ERROR: File is not a JPEG
}
$count = 0;
$done = false;
$ok = true;
while (!$done) {
$capture = false;
// First, skip any non 0xFF bytes
$discarded = 0;
$c = ord(fgetc($this->_fp));
while (!feof($this->_fp) && ($c != 0xFF)) {
$discarded++;
$c = ord(fgetc($this->_fp));
}
// Then skip all 0xFF until the marker byte
do {
$marker = ord(fgetc($this->_fp));
} while (!feof($this->_fp) && ($marker == 0xFF));
if (feof($this->_fp)) {
return false; // ERROR: Unexpected EOF
}
if ($discarded != 0) {
return false; // ERROR: Extraneous data
}
$length = ord(fgetc($this->_fp)) * 256 + ord(fgetc($this->_fp));
if (feof($this->_fp)) {
return false; // ERROR: Unexpected EOF
}
if ($length < 2) {
return false; // ERROR: Extraneous data
}
$length = $length - 2; // The length we got counts itself
switch ($marker) {
case 0xC0: // SOF0
case 0xC1: // SOF1
case 0xC2: // SOF2
case 0xC9: // SOF9
case 0xE0: // APP0: JFIF data
case 0xE1: // APP1: EXIF or XMP data
case 0xED: // APP13: IPTC / Photoshop data
$capture = true;
break;
case 0xDA: // SOS: Start of scan... the image itself and the last block on the file
$capture = false;
$length = -1; // This field has no length... it includes all data until EOF
$done = true;
break;
default:
$capture = true;//false;
break;
}
$this->_markers[$count] = array();
$this->_markers[$count]['marker'] = $marker;
$this->_markers[$count]['length'] = $length;
if ($capture) {
if ($length)
$this->_markers[$count]['data'] = fread($this->_fp, $length);
else
$this->_markers[$count]['data'] = "";
}
elseif (!$done) {
$result = @fseek($this->_fp, $length, SEEK_CUR);
// fseek doesn't seem to like HTTP 'files', but fgetc has no problem
if (!($result === 0)) {
for ($i = 0; $i < $length; $i++) {
fgetc($this->_fp);
}
}
}
$count++;
}
if ($this->_fp) {
fclose($this->_fp);
$this->_fp = null;
}
return $ok;
}
/*************************************************************/
function _parseAll() {
if (!isset($this->_info['file'])) {
$this->_parseFileInfo();
}
if (!isset($this->_markers)) {
$this->_readJPEG();
}
if ($this->_markers == null) {
return false;
}
if (!isset($this->_info['jfif'])) {
$this->_parseMarkerJFIF();
}
if (!isset($this->_info['jpeg'])) {
$this->_parseMarkerSOF();
}
if (!isset($this->_info['exif'])) {
$this->_parseMarkerExif();
}
if (!isset($this->_info['xmp'])) {
$this->_parseMarkerXmp();
}
if (!isset($this->_info['adobe'])) {
$this->_parseMarkerAdobe();
}
}
/*************************************************************/
/**
* @param string $outputName
*
* @return bool
*/
function _writeJPEG($outputName) {
$this->_parseAll();
$wroteEXIF = false;
$wroteAdobe = false;
$this->_fp = @fopen($this->_fileName, 'r');
if ($this->_fp) {
if (file_exists($this->_fileName)) {
$this->_type = 'file';
}
else {
$this->_type = 'url';
}
} else {
$this->_fp = null;
return false; // ERROR: Can't open file
}
$this->_fpout = fopen($outputName, 'wb');
if (!$this->_fpout) {
$this->_fpout = null;
fclose($this->_fp);
$this->_fp = null;
return false; // ERROR: Can't open output file
}
// Check for the JPEG signature
$c1 = ord(fgetc($this->_fp));
$c2 = ord(fgetc($this->_fp));
if ($c1 != 0xFF || $c2 != 0xD8) { // (0xFF + SOI)
return false; // ERROR: File is not a JPEG
}
fputs($this->_fpout, chr(0xFF), 1);
fputs($this->_fpout, chr(0xD8), 1); // (0xFF + SOI)
$count = 0;
$done = false;
$ok = true;
while (!$done) {
// First, skip any non 0xFF bytes
$discarded = 0;
$c = ord(fgetc($this->_fp));
while (!feof($this->_fp) && ($c != 0xFF)) {
$discarded++;
$c = ord(fgetc($this->_fp));
}
// Then skip all 0xFF until the marker byte
do {
$marker = ord(fgetc($this->_fp));
} while (!feof($this->_fp) && ($marker == 0xFF));
if (feof($this->_fp)) {
$ok = false;
break; // ERROR: Unexpected EOF
}
if ($discarded != 0) {
$ok = false;
break; // ERROR: Extraneous data
}
$length = ord(fgetc($this->_fp)) * 256 + ord(fgetc($this->_fp));
if (feof($this->_fp)) {
$ok = false;
break; // ERROR: Unexpected EOF
}
if ($length < 2) {
$ok = false;
break; // ERROR: Extraneous data
}
$length = $length - 2; // The length we got counts itself
unset($data);
if ($marker == 0xE1) { // APP1: EXIF data
$data =& $this->_createMarkerEXIF();
$wroteEXIF = true;
}
elseif ($marker == 0xED) { // APP13: IPTC / Photoshop data
$data =& $this->_createMarkerAdobe();
$wroteAdobe = true;
}
elseif ($marker == 0xDA) { // SOS: Start of scan... the image itself and the last block on the file
$done = true;
}
if (!$wroteEXIF && (($marker < 0xE0) || ($marker > 0xEF))) {
if (isset($this->_info['exif']) && is_array($this->_info['exif'])) {
$exif =& $this->_createMarkerEXIF();
$this->_writeJPEGMarker(0xE1, strlen($exif), $exif, 0);
unset($exif);
}
$wroteEXIF = true;
}
if (!$wroteAdobe && (($marker < 0xE0) || ($marker > 0xEF))) {
if ((isset($this->_info['adobe']) && is_array($this->_info['adobe']))
|| (isset($this->_info['iptc']) && is_array($this->_info['iptc']))) {
$adobe =& $this->_createMarkerAdobe();
$this->_writeJPEGMarker(0xED, strlen($adobe), $adobe, 0);
unset($adobe);
}
$wroteAdobe = true;
}
$origLength = $length;
if (isset($data)) {
$length = strlen($data);
}
if ($marker != -1) {
$this->_writeJPEGMarker($marker, $length, $data, $origLength);
}
}
if ($this->_fp) {
fclose($this->_fp);
$this->_fp = null;
}
if ($this->_fpout) {
fclose($this->_fpout);
$this->_fpout = null;
}
return $ok;
}
/*************************************************************/
/**
* @param integer $marker
* @param integer $length
* @param string $data
* @param integer $origLength
*
* @return bool
*/
function _writeJPEGMarker($marker, $length, &$data, $origLength) {
if ($length <= 0) {
return false;
}
fputs($this->_fpout, chr(0xFF), 1);
fputs($this->_fpout, chr($marker), 1);
fputs($this->_fpout, chr((($length + 2) & 0x0000FF00) >> 8), 1);
fputs($this->_fpout, chr((($length + 2) & 0x000000FF) >> 0), 1);
if (isset($data)) {
// Copy the generated data
fputs($this->_fpout, $data, $length);
if ($origLength > 0) { // Skip the original data
$result = @fseek($this->_fp, $origLength, SEEK_CUR);
// fseek doesn't seem to like HTTP 'files', but fgetc has no problem
if ($result != 0) {
for ($i = 0; $i < $origLength; $i++) {
fgetc($this->_fp);
}
}
}
} else {
if ($marker == 0xDA) { // Copy until EOF
while (!feof($this->_fp)) {
$data = fread($this->_fp, 1024 * 16);
fputs($this->_fpout, $data, strlen($data));
}
} else { // Copy only $length bytes
$data = @fread($this->_fp, $length);
fputs($this->_fpout, $data, $length);
}
}
return true;
}
/**
* Gets basic info from the file - should work with non-JPEGs
*
* @author Sebastian Delmont <sdelmont@zonageek.com>
* @author Andreas Gohr <andi@splitbrain.org>
*/
function _parseFileInfo() {
if (file_exists($this->_fileName) && is_file($this->_fileName)) {
$this->_info['file'] = array();
$this->_info['file']['Name'] = utf8_decodeFN(\dokuwiki\Utf8\PhpString::basename($this->_fileName));
$this->_info['file']['Path'] = fullpath($this->_fileName);
$this->_info['file']['Size'] = filesize($this->_fileName);
if ($this->_info['file']['Size'] < 1024) {
$this->_info['file']['NiceSize'] = $this->_info['file']['Size'] . 'B';
} elseif ($this->_info['file']['Size'] < (1024 * 1024)) {
$this->_info['file']['NiceSize'] = round($this->_info['file']['Size'] / 1024) . 'KB';
} elseif ($this->_info['file']['Size'] < (1024 * 1024 * 1024)) {
$this->_info['file']['NiceSize'] = round($this->_info['file']['Size'] / (1024*1024)) . 'MB';
} else {
$this->_info['file']['NiceSize'] = $this->_info['file']['Size'] . 'B';
}
$this->_info['file']['UnixTime'] = filemtime($this->_fileName);
// get image size directly from file
if ($size = getimagesize($this->_fileName)) {
$this->_info['file']['Width'] = $size[0];
$this->_info['file']['Height'] = $size[1];
// set mime types and formats
// http://php.net/manual/en/function.getimagesize.php
// http://php.net/manual/en/function.image-type-to-mime-type.php
switch ($size[2]) {
case 1:
$this->_info['file']['Mime'] = 'image/gif';
$this->_info['file']['Format'] = 'GIF';
break;
case 2:
$this->_info['file']['Mime'] = 'image/jpeg';
$this->_info['file']['Format'] = 'JPEG';
break;
case 3:
$this->_info['file']['Mime'] = 'image/png';
$this->_info['file']['Format'] = 'PNG';
break;
case 4:
$this->_info['file']['Mime'] = 'application/x-shockwave-flash';
$this->_info['file']['Format'] = 'SWF';
break;
case 5:
$this->_info['file']['Mime'] = 'image/psd';
$this->_info['file']['Format'] = 'PSD';
break;
case 6:
$this->_info['file']['Mime'] = 'image/bmp';
$this->_info['file']['Format'] = 'BMP';
break;
case 7:
$this->_info['file']['Mime'] = 'image/tiff';
$this->_info['file']['Format'] = 'TIFF (Intel)';
break;
case 8:
$this->_info['file']['Mime'] = 'image/tiff';
$this->_info['file']['Format'] = 'TIFF (Motorola)';
break;
case 9:
$this->_info['file']['Mime'] = 'application/octet-stream';
$this->_info['file']['Format'] = 'JPC';
break;
case 10:
$this->_info['file']['Mime'] = 'image/jp2';
$this->_info['file']['Format'] = 'JP2';
break;
case 11:
$this->_info['file']['Mime'] = 'application/octet-stream';
$this->_info['file']['Format'] = 'JPX';
break;
case 12:
$this->_info['file']['Mime'] = 'application/octet-stream';
$this->_info['file']['Format'] = 'JB2';
break;
case 13:
$this->_info['file']['Mime'] = 'application/x-shockwave-flash';
$this->_info['file']['Format'] = 'SWC';
break;
case 14:
$this->_info['file']['Mime'] = 'image/iff';
$this->_info['file']['Format'] = 'IFF';
break;
case 15:
$this->_info['file']['Mime'] = 'image/vnd.wap.wbmp';
$this->_info['file']['Format'] = 'WBMP';
break;
case 16:
$this->_info['file']['Mime'] = 'image/xbm';
$this->_info['file']['Format'] = 'XBM';
break;
default:
$this->_info['file']['Mime'] = 'image/unknown';
}
}
} else {
$this->_info['file'] = array();
$this->_info['file']['Name'] = \dokuwiki\Utf8\PhpString::basename($this->_fileName);
$this->_info['file']['Url'] = $this->_fileName;
}
return true;
}
/*************************************************************/
function _parseMarkerJFIF() {
if (!isset($this->_markers)) {
$this->_readJPEG();
}
if ($this->_markers == null || $this->_isMarkerDisabled(('jfif'))) {
return false;
}
try {
$data = null;
$count = count($this->_markers);
for ($i = 0; $i < $count; $i++) {
if ($this->_markers[$i]['marker'] == 0xE0) {
$signature = $this->_getFixedString($this->_markers[$i]['data'], 0, 4);
if ($signature == 'JFIF') {
$data =& $this->_markers[$i]['data'];
break;
}
}
}
if ($data == null) {
$this->_info['jfif'] = false;
return false;
}
$this->_info['jfif'] = array();
$vmaj = $this->_getByte($data, 5);
$vmin = $this->_getByte($data, 6);
$this->_info['jfif']['Version'] = sprintf('%d.%02d', $vmaj, $vmin);
$units = $this->_getByte($data, 7);
switch ($units) {
case 0:
$this->_info['jfif']['Units'] = 'pixels';
break;
case 1:
$this->_info['jfif']['Units'] = 'dpi';
break;
case 2:
$this->_info['jfif']['Units'] = 'dpcm';
break;
default:
$this->_info['jfif']['Units'] = 'unknown';
break;
}
$xdens = $this->_getShort($data, 8);
$ydens = $this->_getShort($data, 10);
$this->_info['jfif']['XDensity'] = $xdens;
$this->_info['jfif']['YDensity'] = $ydens;
$thumbx = $this->_getByte($data, 12);
$thumby = $this->_getByte($data, 13);
$this->_info['jfif']['ThumbnailWidth'] = $thumbx;
$this->_info['jfif']['ThumbnailHeight'] = $thumby;
} catch(Exception $e) {
$this->_handleMarkerParsingException($e);
$this->_info['jfif'] = false;
return false;
}
return true;
}
/*************************************************************/
function _parseMarkerSOF() {
if (!isset($this->_markers)) {
$this->_readJPEG();
}
if ($this->_markers == null || $this->_isMarkerDisabled(('sof'))) {
return false;
}
try {
$data = null;
$count = count($this->_markers);
for ($i = 0; $i < $count; $i++) {
switch ($this->_markers[$i]['marker']) {
case 0xC0: // SOF0
case 0xC1: // SOF1
case 0xC2: // SOF2
case 0xC9: // SOF9
$data =& $this->_markers[$i]['data'];
$marker = $this->_markers[$i]['marker'];
break;
}
}
if ($data == null) {
$this->_info['sof'] = false;
return false;
}
$pos = 0;
$this->_info['sof'] = array();
switch ($marker) {
case 0xC0: // SOF0
$format = 'Baseline';
break;
case 0xC1: // SOF1
$format = 'Progessive';
break;
case 0xC2: // SOF2
$format = 'Non-baseline';
break;
case 0xC9: // SOF9
$format = 'Arithmetic';
break;
default:
return false;
}
$this->_info['sof']['Format'] = $format;
$this->_info['sof']['SamplePrecision'] = $this->_getByte($data, $pos + 0);
$this->_info['sof']['ImageHeight'] = $this->_getShort($data, $pos + 1);
$this->_info['sof']['ImageWidth'] = $this->_getShort($data, $pos + 3);
$this->_info['sof']['ColorChannels'] = $this->_getByte($data, $pos + 5);
} catch(Exception $e) {
$this->_handleMarkerParsingException($e);
$this->_info['sof'] = false;
return false;
}
return true;
}
/**
* Parses the XMP data
*
* @author Hakan Sandell <hakan.sandell@mydata.se>
*/
function _parseMarkerXmp() {
if (!isset($this->_markers)) {
$this->_readJPEG();
}
if ($this->_markers == null || $this->_isMarkerDisabled(('xmp'))) {
return false;
}
try {
$data = null;
$count = count($this->_markers);
for ($i = 0; $i < $count; $i++) {
if ($this->_markers[$i]['marker'] == 0xE1) {
$signature = $this->_getFixedString($this->_markers[$i]['data'], 0, 29);
if ($signature == "http://ns.adobe.com/xap/1.0/\0") {
$data = substr($this->_markers[$i]['data'], 29);
break;
}
}
}
if ($data == null) {
$this->_info['xmp'] = false;
return false;
}
$parser = xml_parser_create();
xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0);
xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 1);
$result = xml_parse_into_struct($parser, $data, $values, $tags);
xml_parser_free($parser);
if ($result == 0) {
$this->_info['xmp'] = false;
return false;
}
$this->_info['xmp'] = array();
$count = count($values);
for ($i = 0; $i < $count; $i++) {
if ($values[$i]['tag'] == 'rdf:Description' && $values[$i]['type'] == 'open') {
while ((++$i < $count) && ($values[$i]['tag'] != 'rdf:Description')) {
$this->_parseXmpNode($values, $i, $this->_info['xmp'][$values[$i]['tag']], $count);
}
}
}
} catch (Exception $e) {
$this->_handleMarkerParsingException($e);
$this->_info['xmp'] = false;
return false;
}
return true;
}
/**
* Parses XMP nodes by recursion
*
* @author Hakan Sandell <hakan.sandell@mydata.se>
*
* @param array $values
* @param int $i
* @param mixed $meta
* @param integer $count
*/
function _parseXmpNode($values, &$i, &$meta, $count) {
if ($values[$i]['type'] == 'close') return;
if ($values[$i]['type'] == 'complete') {
// Simple Type property
$meta = $values[$i]['value'] ?? '';
return;
}
$i++;
if ($i >= $count) return;
if ($values[$i]['tag'] == 'rdf:Bag' || $values[$i]['tag'] == 'rdf:Seq') {
// Array property
$meta = array();
while ($values[++$i]['tag'] == 'rdf:li') {
$this->_parseXmpNode($values, $i, $meta[], $count);
}
$i++; // skip closing Bag/Seq tag
} elseif ($values[$i]['tag'] == 'rdf:Alt') {
// Language Alternative property, only the first (default) value is used
if ($values[$i]['type'] == 'open') {
$i++;
$this->_parseXmpNode($values, $i, $meta, $count);
while ((++$i < $count) && ($values[$i]['tag'] != 'rdf:Alt'));
$i++; // skip closing Alt tag
}
} else {
// Structure property
$meta = array();
$startTag = $values[$i-1]['tag'];
do {
$this->_parseXmpNode($values, $i, $meta[$values[$i]['tag']], $count);
} while ((++$i < $count) && ($values[$i]['tag'] != $startTag));
}
}
/*************************************************************/
function _parseMarkerExif() {
if (!isset($this->_markers)) {
$this->_readJPEG();
}
if ($this->_markers == null || $this->_isMarkerDisabled(('exif'))) {
return false;
}
try {
$data = null;
$count = count($this->_markers);
for ($i = 0; $i < $count; $i++) {
if ($this->_markers[$i]['marker'] == 0xE1) {
$signature = $this->_getFixedString($this->_markers[$i]['data'], 0, 6);
if ($signature == "Exif\0\0") {
$data =& $this->_markers[$i]['data'];
break;
}
}
}
if ($data == null) {
$this->_info['exif'] = false;
return false;
}
$pos = 6;
$this->_info['exif'] = array();
// We don't increment $pos after this because Exif uses offsets relative to this point
$byteAlign = $this->_getShort($data, $pos + 0);
if ($byteAlign == 0x4949) { // "II"
$isBigEndian = false;
} elseif ($byteAlign == 0x4D4D) { // "MM"
$isBigEndian = true;
} else {
return false; // Unexpected data
}
$alignCheck = $this->_getShort($data, $pos + 2, $isBigEndian);
if ($alignCheck != 0x002A) // That's the expected value
return false; // Unexpected data
if ($isBigEndian) {
$this->_info['exif']['ByteAlign'] = "Big Endian";
} else {
$this->_info['exif']['ByteAlign'] = "Little Endian";
}
$offsetIFD0 = $this->_getLong($data, $pos + 4, $isBigEndian);
if ($offsetIFD0 < 8)
return false; // Unexpected data
$offsetIFD1 = $this->_readIFD($data, $pos, $offsetIFD0, $isBigEndian, 'ifd0');
if ($offsetIFD1 != 0)
$this->_readIFD($data, $pos, $offsetIFD1, $isBigEndian, 'ifd1');
} catch(Exception $e) {
$this->_handleMarkerParsingException($e);
$this->_info['exif'] = false;
return false;
}
return true;
}
/*************************************************************/
/**
* @param mixed $data
* @param integer $base
* @param integer $offset
* @param boolean $isBigEndian
* @param string $mode
*
* @return int
*/
function _readIFD($data, $base, $offset, $isBigEndian, $mode) {
$EXIFTags = $this->_exifTagNames($mode);
$numEntries = $this->_getShort($data, $base + $offset, $isBigEndian);
$offset += 2;
$exifTIFFOffset = 0;
$exifTIFFLength = 0;
$exifThumbnailOffset = 0;
$exifThumbnailLength = 0;
for ($i = 0; $i < $numEntries; $i++) {
$tag = $this->_getShort($data, $base + $offset, $isBigEndian);
$offset += 2;
$type = $this->_getShort($data, $base + $offset, $isBigEndian);
$offset += 2;
$count = $this->_getLong($data, $base + $offset, $isBigEndian);
$offset += 4;
if (($type < 1) || ($type > 12))
return false; // Unexpected Type
$typeLengths = array( -1, 1, 1, 2, 4, 8, 1, 1, 2, 4, 8, 4, 8 );
$dataLength = $typeLengths[$type] * $count;
if ($dataLength > 4) {
$dataOffset = $this->_getLong($data, $base + $offset, $isBigEndian);
$rawValue = $this->_getFixedString($data, $base + $dataOffset, $dataLength);
} else {
$rawValue = $this->_getFixedString($data, $base + $offset, $dataLength);
}
$offset += 4;
switch ($type) {
case 1: // UBYTE
if ($count == 1) {
$value = $this->_getByte($rawValue, 0);
} else {
$value = array();
for ($j = 0; $j < $count; $j++)
$value[$j] = $this->_getByte($rawValue, $j);
}
break;
case 2: // ASCII
$value = $rawValue;
break;
case 3: // USHORT
if ($count == 1) {
$value = $this->_getShort($rawValue, 0, $isBigEndian);
} else {
$value = array();
for ($j = 0; $j < $count; $j++)
$value[$j] = $this->_getShort($rawValue, $j * 2, $isBigEndian);
}
break;
case 4: // ULONG
if ($count == 1) {
$value = $this->_getLong($rawValue, 0, $isBigEndian);
} else {
$value = array();
for ($j = 0; $j < $count; $j++)
$value[$j] = $this->_getLong($rawValue, $j * 4, $isBigEndian);
}
break;
case 5: // URATIONAL
if ($count == 1) {
$a = $this->_getLong($rawValue, 0, $isBigEndian);
$b = $this->_getLong($rawValue, 4, $isBigEndian);
$value = array();
$value['val'] = 0;
$value['num'] = $a;
$value['den'] = $b;
if (($a != 0) && ($b != 0)) {
$value['val'] = $a / $b;
}
} else {
$value = array();
for ($j = 0; $j < $count; $j++) {
$a = $this->_getLong($rawValue, $j * 8, $isBigEndian);
$b = $this->_getLong($rawValue, ($j * 8) + 4, $isBigEndian);
$value = array();
$value[$j]['val'] = 0;
$value[$j]['num'] = $a;
$value[$j]['den'] = $b;
if (($a != 0) && ($b != 0))
$value[$j]['val'] = $a / $b;
}
}
break;
case 6: // SBYTE
if ($count == 1) {
$value = $this->_getByte($rawValue, 0);
} else {
$value = array();
for ($j = 0; $j < $count; $j++)
$value[$j] = $this->_getByte($rawValue, $j);
}
break;
case 7: // UNDEFINED
$value = $rawValue;
break;
case 8: // SSHORT
if ($count == 1) {
$value = $this->_getShort($rawValue, 0, $isBigEndian);
} else {
$value = array();
for ($j = 0; $j < $count; $j++)
$value[$j] = $this->_getShort($rawValue, $j * 2, $isBigEndian);
}
break;
case 9: // SLONG
if ($count == 1) {
$value = $this->_getLong($rawValue, 0, $isBigEndian);
} else {
$value = array();
for ($j = 0; $j < $count; $j++)
$value[$j] = $this->_getLong($rawValue, $j * 4, $isBigEndian);
}
break;
case 10: // SRATIONAL
if ($count == 1) {
$a = $this->_getLong($rawValue, 0, $isBigEndian);
$b = $this->_getLong($rawValue, 4, $isBigEndian);
$value = array();
$value['val'] = 0;
$value['num'] = $a;
$value['den'] = $b;
if (($a != 0) && ($b != 0))
$value['val'] = $a / $b;
} else {
$value = array();
for ($j = 0; $j < $count; $j++) {
$a = $this->_getLong($rawValue, $j * 8, $isBigEndian);
$b = $this->_getLong($rawValue, ($j * 8) + 4, $isBigEndian);
$value = array();
$value[$j]['val'] = 0;
$value[$j]['num'] = $a;
$value[$j]['den'] = $b;
if (($a != 0) && ($b != 0))
$value[$j]['val'] = $a / $b;
}
}
break;
case 11: // FLOAT
$value = $rawValue;
break;
case 12: // DFLOAT
$value = $rawValue;
break;
default:
return false; // Unexpected Type
}
$tagName = '';
if (($mode == 'ifd0') && ($tag == 0x8769)) { // ExifIFDOffset
$this->_readIFD($data, $base, $value, $isBigEndian, 'exif');
} elseif (($mode == 'ifd0') && ($tag == 0x8825)) { // GPSIFDOffset
$this->_readIFD($data, $base, $value, $isBigEndian, 'gps');
} elseif (($mode == 'ifd1') && ($tag == 0x0111)) { // TIFFStripOffsets
$exifTIFFOffset = $value;
} elseif (($mode == 'ifd1') && ($tag == 0x0117)) { // TIFFStripByteCounts
$exifTIFFLength = $value;
} elseif (($mode == 'ifd1') && ($tag == 0x0201)) { // TIFFJFIFOffset
$exifThumbnailOffset = $value;
} elseif (($mode == 'ifd1') && ($tag == 0x0202)) { // TIFFJFIFLength
$exifThumbnailLength = $value;
} elseif (($mode == 'exif') && ($tag == 0xA005)) { // InteropIFDOffset
$this->_readIFD($data, $base, $value, $isBigEndian, 'interop');
}
// elseif (($mode == 'exif') && ($tag == 0x927C)) { // MakerNote
// }
else {
if (isset($EXIFTags[$tag])) {
$tagName = $EXIFTags[$tag];
if (isset($this->_info['exif'][$tagName])) {
if (!is_array($this->_info['exif'][$tagName])) {
$aux = array();
$aux[0] = $this->_info['exif'][$tagName];
$this->_info['exif'][$tagName] = $aux;
}
$this->_info['exif'][$tagName][count($this->_info['exif'][$tagName])] = $value;
} else {
$this->_info['exif'][$tagName] = $value;
}
}
/*
else {
echo sprintf("<h1>Unknown tag %02x (t: %d l: %d) %s in %s</h1>", $tag, $type, $count, $mode, $this->_fileName);
// Unknown Tags will be ignored!!!
// That's because the tag might be a pointer (like the Exif tag)
// and saving it without saving the data it points to might
// create an invalid file.
}
*/
}
}
if (($exifThumbnailOffset > 0) && ($exifThumbnailLength > 0)) {
$this->_info['exif']['JFIFThumbnail'] = $this->_getFixedString($data, $base + $exifThumbnailOffset, $exifThumbnailLength);
}
if (($exifTIFFOffset > 0) && ($exifTIFFLength > 0)) {
$this->_info['exif']['TIFFStrips'] = $this->_getFixedString($data, $base + $exifTIFFOffset, $exifTIFFLength);
}
$nextOffset = $this->_getLong($data, $base + $offset, $isBigEndian);
return $nextOffset;
}
/*************************************************************/
function & _createMarkerExif() {
$data = null;
$count = count($this->_markers);
for ($i = 0; $i < $count; $i++) {
if ($this->_markers[$i]['marker'] == 0xE1) {
$signature = $this->_getFixedString($this->_markers[$i]['data'], 0, 6);
if ($signature == "Exif\0\0") {
$data =& $this->_markers[$i]['data'];
break;
}
}
}
if (!isset($this->_info['exif'])) {
return false;
}
$data = "Exif\0\0";
$pos = 6;
$offsetBase = 6;
if (isset($this->_info['exif']['ByteAlign']) && ($this->_info['exif']['ByteAlign'] == "Big Endian")) {
$isBigEndian = true;
$aux = "MM";
$pos = $this->_putString($data, $pos, $aux);
} else {
$isBigEndian = false;
$aux = "II";
$pos = $this->_putString($data, $pos, $aux);
}
$pos = $this->_putShort($data, $pos, 0x002A, $isBigEndian);
$pos = $this->_putLong($data, $pos, 0x00000008, $isBigEndian); // IFD0 Offset is always 8
$ifd0 =& $this->_getIFDEntries($isBigEndian, 'ifd0');
$ifd1 =& $this->_getIFDEntries($isBigEndian, 'ifd1');
$pos = $this->_writeIFD($data, $pos, $offsetBase, $ifd0, $isBigEndian, true);
$pos = $this->_writeIFD($data, $pos, $offsetBase, $ifd1, $isBigEndian, false);
return $data;
}
/*************************************************************/
/**
* @param mixed $data
* @param integer $pos
* @param integer $offsetBase
* @param array $entries
* @param boolean $isBigEndian
* @param boolean $hasNext
*
* @return mixed
*/
function _writeIFD(&$data, $pos, $offsetBase, &$entries, $isBigEndian, $hasNext) {
$tiffData = null;
$tiffDataOffsetPos = -1;
$entryCount = count($entries);
$dataPos = $pos + 2 + ($entryCount * 12) + 4;
$pos = $this->_putShort($data, $pos, $entryCount, $isBigEndian);
for ($i = 0; $i < $entryCount; $i++) {
$tag = $entries[$i]['tag'];
$type = $entries[$i]['type'];
if ($type == -99) { // SubIFD
$pos = $this->_putShort($data, $pos, $tag, $isBigEndian);
$pos = $this->_putShort($data, $pos, 0x04, $isBigEndian); // LONG
$pos = $this->_putLong($data, $pos, 0x01, $isBigEndian); // Count = 1
$pos = $this->_putLong($data, $pos, $dataPos - $offsetBase, $isBigEndian);
$dataPos = $this->_writeIFD($data, $dataPos, $offsetBase, $entries[$i]['value'], $isBigEndian, false);
} elseif ($type == -98) { // TIFF Data
$pos = $this->_putShort($data, $pos, $tag, $isBigEndian);
$pos = $this->_putShort($data, $pos, 0x04, $isBigEndian); // LONG
$pos = $this->_putLong($data, $pos, 0x01, $isBigEndian); // Count = 1
$tiffDataOffsetPos = $pos;
$pos = $this->_putLong($data, $pos, 0x00, $isBigEndian); // For Now
$tiffData =& $entries[$i]['value'] ;
} else { // Regular Entry
$pos = $this->_putShort($data, $pos, $tag, $isBigEndian);
$pos = $this->_putShort($data, $pos, $type, $isBigEndian);
$pos = $this->_putLong($data, $pos, $entries[$i]['count'], $isBigEndian);
if (strlen($entries[$i]['value']) > 4) {
$pos = $this->_putLong($data, $pos, $dataPos - $offsetBase, $isBigEndian);
$dataPos = $this->_putString($data, $dataPos, $entries[$i]['value']);
} else {
$val = str_pad($entries[$i]['value'], 4, "\0");
$pos = $this->_putString($data, $pos, $val);
}
}
}
if ($tiffData != null) {
$this->_putLong($data, $tiffDataOffsetPos, $dataPos - $offsetBase, $isBigEndian);
$dataPos = $this->_putString($data, $dataPos, $tiffData);
}
if ($hasNext) {
$pos = $this->_putLong($data, $pos, $dataPos - $offsetBase, $isBigEndian);
} else {
$pos = $this->_putLong($data, $pos, 0, $isBigEndian);
}
return $dataPos;
}
/*************************************************************/
/**
* @param boolean $isBigEndian
* @param string $mode
*
* @return array
*/
function & _getIFDEntries($isBigEndian, $mode) {
$EXIFNames = $this->_exifTagNames($mode);
$EXIFTags = $this->_exifNameTags($mode);
$EXIFTypeInfo = $this->_exifTagTypes($mode);
$ifdEntries = array();
$entryCount = 0;
foreach($EXIFNames as $tag => $name) {
$type = $EXIFTypeInfo[$tag][0];
$count = $EXIFTypeInfo[$tag][1];
$value = null;
if (($mode == 'ifd0') && ($tag == 0x8769)) { // ExifIFDOffset
if (isset($this->_info['exif']['EXIFVersion'])) {
$value =& $this->_getIFDEntries($isBigEndian, "exif");
$type = -99;
}
else {
$value = null;
}
} elseif (($mode == 'ifd0') && ($tag == 0x8825)) { // GPSIFDOffset
if (isset($this->_info['exif']['GPSVersionID'])) {
$value =& $this->_getIFDEntries($isBigEndian, "gps");
$type = -99;
} else {
$value = null;
}
} elseif (($mode == 'ifd1') && ($tag == 0x0111)) { // TIFFStripOffsets
if (isset($this->_info['exif']['TIFFStrips'])) {
$value =& $this->_info['exif']['TIFFStrips'];
$type = -98;
} else {
$value = null;
}
} elseif (($mode == 'ifd1') && ($tag == 0x0117)) { // TIFFStripByteCounts
if (isset($this->_info['exif']['TIFFStrips'])) {
$value = strlen($this->_info['exif']['TIFFStrips']);
} else {
$value = null;
}
} elseif (($mode == 'ifd1') && ($tag == 0x0201)) { // TIFFJFIFOffset
if (isset($this->_info['exif']['JFIFThumbnail'])) {
$value =& $this->_info['exif']['JFIFThumbnail'];
$type = -98;
} else {
$value = null;
}
} elseif (($mode == 'ifd1') && ($tag == 0x0202)) { // TIFFJFIFLength
if (isset($this->_info['exif']['JFIFThumbnail'])) {
$value = strlen($this->_info['exif']['JFIFThumbnail']);
} else {
$value = null;
}
} elseif (($mode == 'exif') && ($tag == 0xA005)) { // InteropIFDOffset
if (isset($this->_info['exif']['InteroperabilityIndex'])) {
$value =& $this->_getIFDEntries($isBigEndian, "interop");
$type = -99;
} else {
$value = null;
}
} elseif (isset($this->_info['exif'][$name])) {
$origValue =& $this->_info['exif'][$name];
// This makes it easier to process variable size elements
if (!is_array($origValue) || isset($origValue['val'])) {
unset($origValue); // Break the reference
$origValue = array($this->_info['exif'][$name]);
}
$origCount = count($origValue);
if ($origCount == 0 ) {
$type = -1; // To ignore this field
}
$value = " ";
switch ($type) {
case 1: // UBYTE
if ($count == 0) {
$count = $origCount;
}
$j = 0;
while (($j < $count) && ($j < $origCount)) {
$this->_putByte($value, $j, $origValue[$j]);
$j++;
}
while ($j < $count) {
$this->_putByte($value, $j, 0);
$j++;
}
break;
case 2: // ASCII
$v = strval($origValue[0]);
if (($count != 0) && (strlen($v) > $count)) {
$v = substr($v, 0, $count);
}
elseif (($count > 0) && (strlen($v) < $count)) {
$v = str_pad($v, $count, "\0");
}
$count = strlen($v);
$this->_putString($value, 0, $v);
break;
case 3: // USHORT
if ($count == 0) {
$count = $origCount;
}
$j = 0;
while (($j < $count) && ($j < $origCount)) {
$this->_putShort($value, $j * 2, $origValue[$j], $isBigEndian);
$j++;
}
while ($j < $count) {
$this->_putShort($value, $j * 2, 0, $isBigEndian);
$j++;
}
break;
case 4: // ULONG
if ($count == 0) {
$count = $origCount;
}
$j = 0;
while (($j < $count) && ($j < $origCount)) {
$this->_putLong($value, $j * 4, $origValue[$j], $isBigEndian);
$j++;
}
while ($j < $count) {
$this->_putLong($value, $j * 4, 0, $isBigEndian);
$j++;
}
break;
case 5: // URATIONAL
if ($count == 0) {
$count = $origCount;
}
$j = 0;
while (($j < $count) && ($j < $origCount)) {
$v = $origValue[$j];
if (is_array($v)) {
$a = $v['num'];
$b = $v['den'];
}
else {
$a = 0;
$b = 0;
// TODO: Allow other types and convert them
}
$this->_putLong($value, $j * 8, $a, $isBigEndian);
$this->_putLong($value, ($j * 8) + 4, $b, $isBigEndian);
$j++;
}
while ($j < $count) {
$this->_putLong($value, $j * 8, 0, $isBigEndian);
$this->_putLong($value, ($j * 8) + 4, 0, $isBigEndian);
$j++;
}
break;
case 6: // SBYTE
if ($count == 0) {
$count = $origCount;
}
$j = 0;
while (($j < $count) && ($j < $origCount)) {
$this->_putByte($value, $j, $origValue[$j]);
$j++;
}
while ($j < $count) {
$this->_putByte($value, $j, 0);
$j++;
}
break;
case 7: // UNDEFINED
$v = strval($origValue[0]);
if (($count != 0) && (strlen($v) > $count)) {
$v = substr($v, 0, $count);
}
elseif (($count > 0) && (strlen($v) < $count)) {
$v = str_pad($v, $count, "\0");
}
$count = strlen($v);
$this->_putString($value, 0, $v);
break;
case 8: // SSHORT
if ($count == 0) {
$count = $origCount;
}
$j = 0;
while (($j < $count) && ($j < $origCount)) {
$this->_putShort($value, $j * 2, $origValue[$j], $isBigEndian);
$j++;
}
while ($j < $count) {
$this->_putShort($value, $j * 2, 0, $isBigEndian);
$j++;
}
break;
case 9: // SLONG
if ($count == 0) {
$count = $origCount;
}
$j = 0;
while (($j < $count) && ($j < $origCount)) {
$this->_putLong($value, $j * 4, $origValue[$j], $isBigEndian);
$j++;
}
while ($j < $count) {
$this->_putLong($value, $j * 4, 0, $isBigEndian);
$j++;
}
break;
case 10: // SRATIONAL
if ($count == 0) {
$count = $origCount;
}
$j = 0;
while (($j < $count) && ($j < $origCount)) {
$v = $origValue[$j];
if (is_array($v)) {
$a = $v['num'];
$b = $v['den'];
}
else {
$a = 0;
$b = 0;
// TODO: Allow other types and convert them
}
$this->_putLong($value, $j * 8, $a, $isBigEndian);
$this->_putLong($value, ($j * 8) + 4, $b, $isBigEndian);
$j++;
}
while ($j < $count) {
$this->_putLong($value, $j * 8, 0, $isBigEndian);
$this->_putLong($value, ($j * 8) + 4, 0, $isBigEndian);
$j++;
}
break;
case 11: // FLOAT
if ($count == 0) {
$count = $origCount;
}
$j = 0;
while (($j < $count) && ($j < $origCount)) {
$v = strval($origValue[$j]);
if (strlen($v) > 4) {
$v = substr($v, 0, 4);
}
elseif (strlen($v) < 4) {
$v = str_pad($v, 4, "\0");
}
$this->_putString($value, $j * 4, $v);
$j++;
}
while ($j < $count) {
$v = "\0\0\0\0";
$this->_putString($value, $j * 4, $v);
$j++;
}
break;
case 12: // DFLOAT
if ($count == 0) {
$count = $origCount;
}
$j = 0;
while (($j < $count) && ($j < $origCount)) {
$v = strval($origValue[$j]);
if (strlen($v) > 8) {
$v = substr($v, 0, 8);
}
elseif (strlen($v) < 8) {
$v = str_pad($v, 8, "\0");
}
$this->_putString($value, $j * 8, $v);
$j++;
}
while ($j < $count) {
$v = "\0\0\0\0\0\0\0\0";
$this->_putString($value, $j * 8, $v);
$j++;
}
break;
default:
$value = null;
break;
}
}
if ($value != null) {
$ifdEntries[$entryCount] = array();
$ifdEntries[$entryCount]['tag'] = $tag;
$ifdEntries[$entryCount]['type'] = $type;
$ifdEntries[$entryCount]['count'] = $count;
$ifdEntries[$entryCount]['value'] = $value;
$entryCount++;
}
}
return $ifdEntries;
}
/*************************************************************/
function _handleMarkerParsingException($e) {
\dokuwiki\ErrorHandler::logException($e, $this->_fileName);
}
/*************************************************************/
function _isMarkerDisabled($name) {
if (!isset($this->_info)) return false;
return isset($this->_info[$name]) && $this->_info[$name] === false;
}
/*************************************************************/
function _parseMarkerAdobe() {
if (!isset($this->_markers)) {
$this->_readJPEG();
}
if ($this->_markers == null || $this->_isMarkerDisabled('adobe')) {
return false;
}
try {
$data = null;
$count = count($this->_markers);
for ($i = 0; $i < $count; $i++) {
if ($this->_markers[$i]['marker'] == 0xED) {
$signature = $this->_getFixedString($this->_markers[$i]['data'], 0, 14);
if ($signature == "Photoshop 3.0\0") {
$data =& $this->_markers[$i]['data'];
break;
}
}
}
if ($data == null) {
$this->_info['adobe'] = false;
$this->_info['iptc'] = false;
return false;
}
$pos = 14;
$this->_info['adobe'] = array();
$this->_info['adobe']['raw'] = array();
$this->_info['iptc'] = array();
$datasize = strlen($data);
while ($pos < $datasize) {
$signature = $this->_getFixedString($data, $pos, 4);
if ($signature != '8BIM')
return false;
$pos += 4;
$type = $this->_getShort($data, $pos);
$pos += 2;
$strlen = $this->_getByte($data, $pos);
$pos += 1;
$header = '';
for ($i = 0; $i < $strlen; $i++) {
$header .= $data[$pos + $i];
}
$pos += $strlen + 1 - ($strlen % 2); // The string is padded to even length, counting the length byte itself
$length = $this->_getLong($data, $pos);
$pos += 4;
$basePos = $pos;
switch ($type) {
case 0x0404: // Caption (IPTC Data)
$pos = $this->_readIPTC($data, $pos);
if ($pos == false)
return false;
break;
case 0x040A: // CopyrightFlag
$this->_info['adobe']['CopyrightFlag'] = $this->_getByte($data, $pos);
$pos += $length;
break;
case 0x040B: // ImageURL
$this->_info['adobe']['ImageURL'] = $this->_getFixedString($data, $pos, $length);
$pos += $length;
break;
case 0x040C: // Thumbnail
$aux = $this->_getLong($data, $pos);
$pos += 4;
if ($aux == 1) {
$this->_info['adobe']['ThumbnailWidth'] = $this->_getLong($data, $pos);
$pos += 4;
$this->_info['adobe']['ThumbnailHeight'] = $this->_getLong($data, $pos);
$pos += 4;
$pos += 16; // Skip some data
$this->_info['adobe']['ThumbnailData'] = $this->_getFixedString($data, $pos, $length - 28);
$pos += $length - 28;
}
break;
default:
break;
}
// We save all blocks, even those we recognized
$label = sprintf('8BIM_0x%04x', $type);
$this->_info['adobe']['raw'][$label] = array();
$this->_info['adobe']['raw'][$label]['type'] = $type;
$this->_info['adobe']['raw'][$label]['header'] = $header;
$this->_info['adobe']['raw'][$label]['data'] =& $this->_getFixedString($data, $basePos, $length);
$pos = $basePos + $length + ($length % 2); // Even padding
}
} catch(Exception $e) {
$this->_handleMarkerParsingException($e);
$this->_info['adobe'] = false;
$this->_info['iptc'] = false;
return false;
}
}
/*************************************************************/
function _readIPTC(&$data, $pos = 0) {
$totalLength = strlen($data);
$IPTCTags = $this->_iptcTagNames();
while ($pos < ($totalLength - 5)) {
$signature = $this->_getShort($data, $pos);
if ($signature != 0x1C02)
return $pos;
$pos += 2;
$type = $this->_getByte($data, $pos);
$pos += 1;
$length = $this->_getShort($data, $pos);
$pos += 2;
$basePos = $pos;
$label = '';
if (isset($IPTCTags[$type])) {
$label = $IPTCTags[$type];
} else {
$label = sprintf('IPTC_0x%02x', $type);
}
if ($label != '') {
if (isset($this->_info['iptc'][$label])) {
if (!is_array($this->_info['iptc'][$label])) {
$aux = array();
$aux[0] = $this->_info['iptc'][$label];
$this->_info['iptc'][$label] = $aux;
}
$this->_info['iptc'][$label][ count($this->_info['iptc'][$label]) ] = $this->_getFixedString($data, $pos, $length);
} else {
$this->_info['iptc'][$label] = $this->_getFixedString($data, $pos, $length);
}
}
$pos = $basePos + $length; // No padding
}
return $pos;
}
/*************************************************************/
function & _createMarkerAdobe() {
if (isset($this->_info['iptc'])) {
if (!isset($this->_info['adobe'])) {
$this->_info['adobe'] = array();
}
if (!isset($this->_info['adobe']['raw'])) {
$this->_info['adobe']['raw'] = array();
}
if (!isset($this->_info['adobe']['raw']['8BIM_0x0404'])) {
$this->_info['adobe']['raw']['8BIM_0x0404'] = array();
}
$this->_info['adobe']['raw']['8BIM_0x0404']['type'] = 0x0404;
$this->_info['adobe']['raw']['8BIM_0x0404']['header'] = "Caption";
$this->_info['adobe']['raw']['8BIM_0x0404']['data'] =& $this->_writeIPTC();
}
if (isset($this->_info['adobe']['raw']) && (count($this->_info['adobe']['raw']) > 0)) {
$data = "Photoshop 3.0\0";
$pos = 14;
reset($this->_info['adobe']['raw']);
foreach ($this->_info['adobe']['raw'] as $value){
$pos = $this->_write8BIM(
$data,
$pos,
$value['type'],
$value['header'],
$value['data'] );
}
}
return $data;
}
/*************************************************************/
/**
* @param mixed $data
* @param integer $pos
*
* @param string $type
* @param string $header
* @param mixed $value
*
* @return int|mixed
*/
function _write8BIM(&$data, $pos, $type, $header, &$value) {
$signature = "8BIM";
$pos = $this->_putString($data, $pos, $signature);
$pos = $this->_putShort($data, $pos, $type);
$len = strlen($header);
$pos = $this->_putByte($data, $pos, $len);
$pos = $this->_putString($data, $pos, $header);
if (($len % 2) == 0) { // Even padding, including the length byte
$pos = $this->_putByte($data, $pos, 0);
}
$len = strlen($value);
$pos = $this->_putLong($data, $pos, $len);
$pos = $this->_putString($data, $pos, $value);
if (($len % 2) != 0) { // Even padding
$pos = $this->_putByte($data, $pos, 0);
}
return $pos;
}
/*************************************************************/
function & _writeIPTC() {
$data = " ";
$pos = 0;
$IPTCNames =& $this->_iptcNameTags();
foreach($this->_info['iptc'] as $label => $value) {
$value =& $this->_info['iptc'][$label];
$type = -1;
if (isset($IPTCNames[$label])) {
$type = $IPTCNames[$label];
}
elseif (str_starts_with($label, 'IPTC_0x')) {
$type = hexdec(substr($label, 7, 2));
}
if ($type != -1) {
if (is_array($value)) {
$vcnt = count($value);
for ($i = 0; $i < $vcnt; $i++) {
$pos = $this->_writeIPTCEntry($data, $pos, $type, $value[$i]);
}
}
else {
$pos = $this->_writeIPTCEntry($data, $pos, $type, $value);
}
}
}
return $data;
}
/*************************************************************/
/**
* @param mixed $data
* @param integer $pos
*
* @param string $type
* @param mixed $value
*
* @return int|mixed
*/
function _writeIPTCEntry(&$data, $pos, $type, &$value) {
$pos = $this->_putShort($data, $pos, 0x1C02);
$pos = $this->_putByte($data, $pos, $type);
$pos = $this->_putShort($data, $pos, strlen($value));
$pos = $this->_putString($data, $pos, $value);
return $pos;
}
/*************************************************************/
function _exifTagNames($mode) {
$tags = array();
if ($mode == 'ifd0') {
$tags[0x010E] = 'ImageDescription';
$tags[0x010F] = 'Make';
$tags[0x0110] = 'Model';
$tags[0x0112] = 'Orientation';
$tags[0x011A] = 'XResolution';
$tags[0x011B] = 'YResolution';
$tags[0x0128] = 'ResolutionUnit';
$tags[0x0131] = 'Software';
$tags[0x0132] = 'DateTime';
$tags[0x013B] = 'Artist';
$tags[0x013E] = 'WhitePoint';
$tags[0x013F] = 'PrimaryChromaticities';
$tags[0x0211] = 'YCbCrCoefficients';
$tags[0x0212] = 'YCbCrSubSampling';
$tags[0x0213] = 'YCbCrPositioning';
$tags[0x0214] = 'ReferenceBlackWhite';
$tags[0x8298] = 'Copyright';
$tags[0x8769] = 'ExifIFDOffset';
$tags[0x8825] = 'GPSIFDOffset';
}
if ($mode == 'ifd1') {
$tags[0x00FE] = 'TIFFNewSubfileType';
$tags[0x00FF] = 'TIFFSubfileType';
$tags[0x0100] = 'TIFFImageWidth';
$tags[0x0101] = 'TIFFImageHeight';
$tags[0x0102] = 'TIFFBitsPerSample';
$tags[0x0103] = 'TIFFCompression';
$tags[0x0106] = 'TIFFPhotometricInterpretation';
$tags[0x0107] = 'TIFFThreshholding';
$tags[0x0108] = 'TIFFCellWidth';
$tags[0x0109] = 'TIFFCellLength';
$tags[0x010A] = 'TIFFFillOrder';
$tags[0x010E] = 'TIFFImageDescription';
$tags[0x010F] = 'TIFFMake';
$tags[0x0110] = 'TIFFModel';
$tags[0x0111] = 'TIFFStripOffsets';
$tags[0x0112] = 'TIFFOrientation';
$tags[0x0115] = 'TIFFSamplesPerPixel';
$tags[0x0116] = 'TIFFRowsPerStrip';
$tags[0x0117] = 'TIFFStripByteCounts';
$tags[0x0118] = 'TIFFMinSampleValue';
$tags[0x0119] = 'TIFFMaxSampleValue';
$tags[0x011A] = 'TIFFXResolution';
$tags[0x011B] = 'TIFFYResolution';
$tags[0x011C] = 'TIFFPlanarConfiguration';
$tags[0x0122] = 'TIFFGrayResponseUnit';
$tags[0x0123] = 'TIFFGrayResponseCurve';
$tags[0x0128] = 'TIFFResolutionUnit';
$tags[0x0131] = 'TIFFSoftware';
$tags[0x0132] = 'TIFFDateTime';
$tags[0x013B] = 'TIFFArtist';
$tags[0x013C] = 'TIFFHostComputer';
$tags[0x0140] = 'TIFFColorMap';
$tags[0x0152] = 'TIFFExtraSamples';
$tags[0x0201] = 'TIFFJFIFOffset';
$tags[0x0202] = 'TIFFJFIFLength';
$tags[0x0211] = 'TIFFYCbCrCoefficients';
$tags[0x0212] = 'TIFFYCbCrSubSampling';
$tags[0x0213] = 'TIFFYCbCrPositioning';
$tags[0x0214] = 'TIFFReferenceBlackWhite';
$tags[0x8298] = 'TIFFCopyright';
$tags[0x9286] = 'TIFFUserComment';
} elseif ($mode == 'exif') {
$tags[0x829A] = 'ExposureTime';
$tags[0x829D] = 'FNumber';
$tags[0x8822] = 'ExposureProgram';
$tags[0x8824] = 'SpectralSensitivity';
$tags[0x8827] = 'ISOSpeedRatings';
$tags[0x8828] = 'OECF';
$tags[0x9000] = 'EXIFVersion';
$tags[0x9003] = 'DateTimeOriginal';
$tags[0x9004] = 'DateTimeDigitized';
$tags[0x9101] = 'ComponentsConfiguration';
$tags[0x9102] = 'CompressedBitsPerPixel';
$tags[0x9201] = 'ShutterSpeedValue';
$tags[0x9202] = 'ApertureValue';
$tags[0x9203] = 'BrightnessValue';
$tags[0x9204] = 'ExposureBiasValue';
$tags[0x9205] = 'MaxApertureValue';
$tags[0x9206] = 'SubjectDistance';
$tags[0x9207] = 'MeteringMode';
$tags[0x9208] = 'LightSource';
$tags[0x9209] = 'Flash';
$tags[0x920A] = 'FocalLength';
$tags[0x927C] = 'MakerNote';
$tags[0x9286] = 'UserComment';
$tags[0x9290] = 'SubSecTime';
$tags[0x9291] = 'SubSecTimeOriginal';
$tags[0x9292] = 'SubSecTimeDigitized';
$tags[0xA000] = 'FlashPixVersion';
$tags[0xA001] = 'ColorSpace';
$tags[0xA002] = 'PixelXDimension';
$tags[0xA003] = 'PixelYDimension';
$tags[0xA004] = 'RelatedSoundFile';
$tags[0xA005] = 'InteropIFDOffset';
$tags[0xA20B] = 'FlashEnergy';
$tags[0xA20C] = 'SpatialFrequencyResponse';
$tags[0xA20E] = 'FocalPlaneXResolution';
$tags[0xA20F] = 'FocalPlaneYResolution';
$tags[0xA210] = 'FocalPlaneResolutionUnit';
$tags[0xA214] = 'SubjectLocation';
$tags[0xA215] = 'ExposureIndex';
$tags[0xA217] = 'SensingMethod';
$tags[0xA300] = 'FileSource';
$tags[0xA301] = 'SceneType';
$tags[0xA302] = 'CFAPattern';
} elseif ($mode == 'interop') {
$tags[0x0001] = 'InteroperabilityIndex';
$tags[0x0002] = 'InteroperabilityVersion';
$tags[0x1000] = 'RelatedImageFileFormat';
$tags[0x1001] = 'RelatedImageWidth';
$tags[0x1002] = 'RelatedImageLength';
} elseif ($mode == 'gps') {
$tags[0x0000] = 'GPSVersionID';
$tags[0x0001] = 'GPSLatitudeRef';
$tags[0x0002] = 'GPSLatitude';
$tags[0x0003] = 'GPSLongitudeRef';
$tags[0x0004] = 'GPSLongitude';
$tags[0x0005] = 'GPSAltitudeRef';
$tags[0x0006] = 'GPSAltitude';
$tags[0x0007] = 'GPSTimeStamp';
$tags[0x0008] = 'GPSSatellites';
$tags[0x0009] = 'GPSStatus';
$tags[0x000A] = 'GPSMeasureMode';
$tags[0x000B] = 'GPSDOP';
$tags[0x000C] = 'GPSSpeedRef';
$tags[0x000D] = 'GPSSpeed';
$tags[0x000E] = 'GPSTrackRef';
$tags[0x000F] = 'GPSTrack';
$tags[0x0010] = 'GPSImgDirectionRef';
$tags[0x0011] = 'GPSImgDirection';
$tags[0x0012] = 'GPSMapDatum';
$tags[0x0013] = 'GPSDestLatitudeRef';
$tags[0x0014] = 'GPSDestLatitude';
$tags[0x0015] = 'GPSDestLongitudeRef';
$tags[0x0016] = 'GPSDestLongitude';
$tags[0x0017] = 'GPSDestBearingRef';
$tags[0x0018] = 'GPSDestBearing';
$tags[0x0019] = 'GPSDestDistanceRef';
$tags[0x001A] = 'GPSDestDistance';
}
return $tags;
}
/*************************************************************/
function _exifTagTypes($mode) {
$tags = array();
if ($mode == 'ifd0') {
$tags[0x010E] = array(2, 0); // ImageDescription -> ASCII, Any
$tags[0x010F] = array(2, 0); // Make -> ASCII, Any
$tags[0x0110] = array(2, 0); // Model -> ASCII, Any
$tags[0x0112] = array(3, 1); // Orientation -> SHORT, 1
$tags[0x011A] = array(5, 1); // XResolution -> RATIONAL, 1
$tags[0x011B] = array(5, 1); // YResolution -> RATIONAL, 1
$tags[0x0128] = array(3, 1); // ResolutionUnit -> SHORT
$tags[0x0131] = array(2, 0); // Software -> ASCII, Any
$tags[0x0132] = array(2, 20); // DateTime -> ASCII, 20
$tags[0x013B] = array(2, 0); // Artist -> ASCII, Any
$tags[0x013E] = array(5, 2); // WhitePoint -> RATIONAL, 2
$tags[0x013F] = array(5, 6); // PrimaryChromaticities -> RATIONAL, 6
$tags[0x0211] = array(5, 3); // YCbCrCoefficients -> RATIONAL, 3
$tags[0x0212] = array(3, 2); // YCbCrSubSampling -> SHORT, 2
$tags[0x0213] = array(3, 1); // YCbCrPositioning -> SHORT, 1
$tags[0x0214] = array(5, 6); // ReferenceBlackWhite -> RATIONAL, 6
$tags[0x8298] = array(2, 0); // Copyright -> ASCII, Any
$tags[0x8769] = array(4, 1); // ExifIFDOffset -> LONG, 1
$tags[0x8825] = array(4, 1); // GPSIFDOffset -> LONG, 1
}
if ($mode == 'ifd1') {
$tags[0x00FE] = array(4, 1); // TIFFNewSubfileType -> LONG, 1
$tags[0x00FF] = array(3, 1); // TIFFSubfileType -> SHORT, 1
$tags[0x0100] = array(4, 1); // TIFFImageWidth -> LONG (or SHORT), 1
$tags[0x0101] = array(4, 1); // TIFFImageHeight -> LONG (or SHORT), 1
$tags[0x0102] = array(3, 3); // TIFFBitsPerSample -> SHORT, 3
$tags[0x0103] = array(3, 1); // TIFFCompression -> SHORT, 1
$tags[0x0106] = array(3, 1); // TIFFPhotometricInterpretation -> SHORT, 1
$tags[0x0107] = array(3, 1); // TIFFThreshholding -> SHORT, 1
$tags[0x0108] = array(3, 1); // TIFFCellWidth -> SHORT, 1
$tags[0x0109] = array(3, 1); // TIFFCellLength -> SHORT, 1
$tags[0x010A] = array(3, 1); // TIFFFillOrder -> SHORT, 1
$tags[0x010E] = array(2, 0); // TIFFImageDescription -> ASCII, Any
$tags[0x010F] = array(2, 0); // TIFFMake -> ASCII, Any
$tags[0x0110] = array(2, 0); // TIFFModel -> ASCII, Any
$tags[0x0111] = array(4, 0); // TIFFStripOffsets -> LONG (or SHORT), Any (one per strip)
$tags[0x0112] = array(3, 1); // TIFFOrientation -> SHORT, 1
$tags[0x0115] = array(3, 1); // TIFFSamplesPerPixel -> SHORT, 1
$tags[0x0116] = array(4, 1); // TIFFRowsPerStrip -> LONG (or SHORT), 1
$tags[0x0117] = array(4, 0); // TIFFStripByteCounts -> LONG (or SHORT), Any (one per strip)
$tags[0x0118] = array(3, 0); // TIFFMinSampleValue -> SHORT, Any (SamplesPerPixel)
$tags[0x0119] = array(3, 0); // TIFFMaxSampleValue -> SHORT, Any (SamplesPerPixel)
$tags[0x011A] = array(5, 1); // TIFFXResolution -> RATIONAL, 1
$tags[0x011B] = array(5, 1); // TIFFYResolution -> RATIONAL, 1
$tags[0x011C] = array(3, 1); // TIFFPlanarConfiguration -> SHORT, 1
$tags[0x0122] = array(3, 1); // TIFFGrayResponseUnit -> SHORT, 1
$tags[0x0123] = array(3, 0); // TIFFGrayResponseCurve -> SHORT, Any (2^BitsPerSample)
$tags[0x0128] = array(3, 1); // TIFFResolutionUnit -> SHORT, 1
$tags[0x0131] = array(2, 0); // TIFFSoftware -> ASCII, Any
$tags[0x0132] = array(2, 20); // TIFFDateTime -> ASCII, 20
$tags[0x013B] = array(2, 0); // TIFFArtist -> ASCII, Any
$tags[0x013C] = array(2, 0); // TIFFHostComputer -> ASCII, Any
$tags[0x0140] = array(3, 0); // TIFFColorMap -> SHORT, Any (3 * 2^BitsPerSample)
$tags[0x0152] = array(3, 0); // TIFFExtraSamples -> SHORT, Any (SamplesPerPixel - 3)
$tags[0x0201] = array(4, 1); // TIFFJFIFOffset -> LONG, 1
$tags[0x0202] = array(4, 1); // TIFFJFIFLength -> LONG, 1
$tags[0x0211] = array(5, 3); // TIFFYCbCrCoefficients -> RATIONAL, 3
$tags[0x0212] = array(3, 2); // TIFFYCbCrSubSampling -> SHORT, 2
$tags[0x0213] = array(3, 1); // TIFFYCbCrPositioning -> SHORT, 1
$tags[0x0214] = array(5, 6); // TIFFReferenceBlackWhite -> RATIONAL, 6
$tags[0x8298] = array(2, 0); // TIFFCopyright -> ASCII, Any
$tags[0x9286] = array(2, 0); // TIFFUserComment -> ASCII, Any
} elseif ($mode == 'exif') {
$tags[0x829A] = array(5, 1); // ExposureTime -> RATIONAL, 1
$tags[0x829D] = array(5, 1); // FNumber -> RATIONAL, 1
$tags[0x8822] = array(3, 1); // ExposureProgram -> SHORT, 1
$tags[0x8824] = array(2, 0); // SpectralSensitivity -> ASCII, Any
$tags[0x8827] = array(3, 0); // ISOSpeedRatings -> SHORT, Any
$tags[0x8828] = array(7, 0); // OECF -> UNDEFINED, Any
$tags[0x9000] = array(7, 4); // EXIFVersion -> UNDEFINED, 4
$tags[0x9003] = array(2, 20); // DateTimeOriginal -> ASCII, 20
$tags[0x9004] = array(2, 20); // DateTimeDigitized -> ASCII, 20
$tags[0x9101] = array(7, 4); // ComponentsConfiguration -> UNDEFINED, 4
$tags[0x9102] = array(5, 1); // CompressedBitsPerPixel -> RATIONAL, 1
$tags[0x9201] = array(10, 1); // ShutterSpeedValue -> SRATIONAL, 1
$tags[0x9202] = array(5, 1); // ApertureValue -> RATIONAL, 1
$tags[0x9203] = array(10, 1); // BrightnessValue -> SRATIONAL, 1
$tags[0x9204] = array(10, 1); // ExposureBiasValue -> SRATIONAL, 1
$tags[0x9205] = array(5, 1); // MaxApertureValue -> RATIONAL, 1
$tags[0x9206] = array(5, 1); // SubjectDistance -> RATIONAL, 1
$tags[0x9207] = array(3, 1); // MeteringMode -> SHORT, 1
$tags[0x9208] = array(3, 1); // LightSource -> SHORT, 1
$tags[0x9209] = array(3, 1); // Flash -> SHORT, 1
$tags[0x920A] = array(5, 1); // FocalLength -> RATIONAL, 1
$tags[0x927C] = array(7, 0); // MakerNote -> UNDEFINED, Any
$tags[0x9286] = array(7, 0); // UserComment -> UNDEFINED, Any
$tags[0x9290] = array(2, 0); // SubSecTime -> ASCII, Any
$tags[0x9291] = array(2, 0); // SubSecTimeOriginal -> ASCII, Any
$tags[0x9292] = array(2, 0); // SubSecTimeDigitized -> ASCII, Any
$tags[0xA000] = array(7, 4); // FlashPixVersion -> UNDEFINED, 4
$tags[0xA001] = array(3, 1); // ColorSpace -> SHORT, 1
$tags[0xA002] = array(4, 1); // PixelXDimension -> LONG (or SHORT), 1
$tags[0xA003] = array(4, 1); // PixelYDimension -> LONG (or SHORT), 1
$tags[0xA004] = array(2, 13); // RelatedSoundFile -> ASCII, 13
$tags[0xA005] = array(4, 1); // InteropIFDOffset -> LONG, 1
$tags[0xA20B] = array(5, 1); // FlashEnergy -> RATIONAL, 1
$tags[0xA20C] = array(7, 0); // SpatialFrequencyResponse -> UNDEFINED, Any
$tags[0xA20E] = array(5, 1); // FocalPlaneXResolution -> RATIONAL, 1
$tags[0xA20F] = array(5, 1); // FocalPlaneYResolution -> RATIONAL, 1
$tags[0xA210] = array(3, 1); // FocalPlaneResolutionUnit -> SHORT, 1
$tags[0xA214] = array(3, 2); // SubjectLocation -> SHORT, 2
$tags[0xA215] = array(5, 1); // ExposureIndex -> RATIONAL, 1
$tags[0xA217] = array(3, 1); // SensingMethod -> SHORT, 1
$tags[0xA300] = array(7, 1); // FileSource -> UNDEFINED, 1
$tags[0xA301] = array(7, 1); // SceneType -> UNDEFINED, 1
$tags[0xA302] = array(7, 0); // CFAPattern -> UNDEFINED, Any
} elseif ($mode == 'interop') {
$tags[0x0001] = array(2, 0); // InteroperabilityIndex -> ASCII, Any
$tags[0x0002] = array(7, 4); // InteroperabilityVersion -> UNKNOWN, 4
$tags[0x1000] = array(2, 0); // RelatedImageFileFormat -> ASCII, Any
$tags[0x1001] = array(4, 1); // RelatedImageWidth -> LONG (or SHORT), 1
$tags[0x1002] = array(4, 1); // RelatedImageLength -> LONG (or SHORT), 1
} elseif ($mode == 'gps') {
$tags[0x0000] = array(1, 4); // GPSVersionID -> BYTE, 4
$tags[0x0001] = array(2, 2); // GPSLatitudeRef -> ASCII, 2
$tags[0x0002] = array(5, 3); // GPSLatitude -> RATIONAL, 3
$tags[0x0003] = array(2, 2); // GPSLongitudeRef -> ASCII, 2
$tags[0x0004] = array(5, 3); // GPSLongitude -> RATIONAL, 3
$tags[0x0005] = array(2, 2); // GPSAltitudeRef -> ASCII, 2
$tags[0x0006] = array(5, 1); // GPSAltitude -> RATIONAL, 1
$tags[0x0007] = array(5, 3); // GPSTimeStamp -> RATIONAL, 3
$tags[0x0008] = array(2, 0); // GPSSatellites -> ASCII, Any
$tags[0x0009] = array(2, 2); // GPSStatus -> ASCII, 2
$tags[0x000A] = array(2, 2); // GPSMeasureMode -> ASCII, 2
$tags[0x000B] = array(5, 1); // GPSDOP -> RATIONAL, 1
$tags[0x000C] = array(2, 2); // GPSSpeedRef -> ASCII, 2
$tags[0x000D] = array(5, 1); // GPSSpeed -> RATIONAL, 1
$tags[0x000E] = array(2, 2); // GPSTrackRef -> ASCII, 2
$tags[0x000F] = array(5, 1); // GPSTrack -> RATIONAL, 1
$tags[0x0010] = array(2, 2); // GPSImgDirectionRef -> ASCII, 2
$tags[0x0011] = array(5, 1); // GPSImgDirection -> RATIONAL, 1
$tags[0x0012] = array(2, 0); // GPSMapDatum -> ASCII, Any
$tags[0x0013] = array(2, 2); // GPSDestLatitudeRef -> ASCII, 2
$tags[0x0014] = array(5, 3); // GPSDestLatitude -> RATIONAL, 3
$tags[0x0015] = array(2, 2); // GPSDestLongitudeRef -> ASCII, 2
$tags[0x0016] = array(5, 3); // GPSDestLongitude -> RATIONAL, 3
$tags[0x0017] = array(2, 2); // GPSDestBearingRef -> ASCII, 2
$tags[0x0018] = array(5, 1); // GPSDestBearing -> RATIONAL, 1
$tags[0x0019] = array(2, 2); // GPSDestDistanceRef -> ASCII, 2
$tags[0x001A] = array(5, 1); // GPSDestDistance -> RATIONAL, 1
}
return $tags;
}
/*************************************************************/
function _exifNameTags($mode) {
$tags = $this->_exifTagNames($mode);
return $this->_names2Tags($tags);
}
/*************************************************************/
function _iptcTagNames() {
$tags = array();
$tags[0x14] = 'SuplementalCategories';
$tags[0x19] = 'Keywords';
$tags[0x78] = 'Caption';
$tags[0x7A] = 'CaptionWriter';
$tags[0x69] = 'Headline';
$tags[0x28] = 'SpecialInstructions';
$tags[0x0F] = 'Category';
$tags[0x50] = 'Byline';
$tags[0x55] = 'BylineTitle';
$tags[0x6E] = 'Credit';
$tags[0x73] = 'Source';
$tags[0x74] = 'CopyrightNotice';
$tags[0x05] = 'ObjectName';
$tags[0x5A] = 'City';
$tags[0x5C] = 'Sublocation';
$tags[0x5F] = 'ProvinceState';
$tags[0x65] = 'CountryName';
$tags[0x67] = 'OriginalTransmissionReference';
$tags[0x37] = 'DateCreated';
$tags[0x0A] = 'CopyrightFlag';
return $tags;
}
/*************************************************************/
function & _iptcNameTags() {
$tags = $this->_iptcTagNames();
return $this->_names2Tags($tags);
}
/*************************************************************/
function _names2Tags($tags2Names) {
$names2Tags = array();
foreach($tags2Names as $tag => $name) {
$names2Tags[$name] = $tag;
}
return $names2Tags;
}
/*************************************************************/
/**
* @param $data
* @param integer $pos
*
* @return int
*/
function _getByte(&$data, $pos) {
if (!isset($data[$pos])) {
throw new Exception("Requested byte at ".$pos.". Reading outside of file's boundaries.");
}
return ord($data[$pos]);
}
/*************************************************************/
/**
* @param mixed $data
* @param integer $pos
*
* @param mixed $val
*
* @return int
*/
function _putByte(&$data, $pos, $val) {
$val = intval($val);
$data[$pos] = chr($val);
return $pos + 1;
}
/*************************************************************/
function _getShort(&$data, $pos, $bigEndian = true) {
if (!isset($data[$pos]) || !isset($data[$pos + 1])) {
throw new Exception("Requested short at ".$pos.". Reading outside of file's boundaries.");
}
if ($bigEndian) {
return (ord($data[$pos]) << 8)
+ ord($data[$pos + 1]);
} else {
return ord($data[$pos])
+ (ord($data[$pos + 1]) << 8);
}
}
/*************************************************************/
function _putShort(&$data, $pos = 0, $val = 0, $bigEndian = true) {
$val = intval($val);
if ($bigEndian) {
$data[$pos + 0] = chr(($val & 0x0000FF00) >> 8);
$data[$pos + 1] = chr(($val & 0x000000FF) >> 0);
} else {
$data[$pos + 0] = chr(($val & 0x00FF) >> 0);
$data[$pos + 1] = chr(($val & 0xFF00) >> 8);
}
return $pos + 2;
}
/*************************************************************/
/**
* @param mixed $data
* @param integer $pos
*
* @param bool $bigEndian
*
* @return int
*/
function _getLong(&$data, $pos, $bigEndian = true) {
// Assume that if the start and end bytes are defined, the bytes inbetween are defined as well.
if (!isset($data[$pos]) || !isset($data[$pos + 3])){
throw new Exception("Requested long at ".$pos.". Reading outside of file's boundaries.");
}
if ($bigEndian) {
return (ord($data[$pos]) << 24)
+ (ord($data[$pos + 1]) << 16)
+ (ord($data[$pos + 2]) << 8)
+ ord($data[$pos + 3]);
} else {
return ord($data[$pos])
+ (ord($data[$pos + 1]) << 8)
+ (ord($data[$pos + 2]) << 16)
+ (ord($data[$pos + 3]) << 24);
}
}
/*************************************************************/
/**
* @param mixed $data
* @param integer $pos
*
* @param mixed $val
* @param bool $bigEndian
*
* @return int
*/
function _putLong(&$data, $pos, $val, $bigEndian = true) {
$val = intval($val);
if ($bigEndian) {
$data[$pos + 0] = chr(($val & 0xFF000000) >> 24);
$data[$pos + 1] = chr(($val & 0x00FF0000) >> 16);
$data[$pos + 2] = chr(($val & 0x0000FF00) >> 8);
$data[$pos + 3] = chr(($val & 0x000000FF) >> 0);
} else {
$data[$pos + 0] = chr(($val & 0x000000FF) >> 0);
$data[$pos + 1] = chr(($val & 0x0000FF00) >> 8);
$data[$pos + 2] = chr(($val & 0x00FF0000) >> 16);
$data[$pos + 3] = chr(($val & 0xFF000000) >> 24);
}
return $pos + 4;
}
/*************************************************************/
function & _getNullString(&$data, $pos) {
$str = '';
$max = strlen($data);
while ($pos < $max) {
if (!isset($data[$pos])) {
throw new Exception("Requested null-terminated string at offset ".$pos.". File terminated before the null-byte.");
}
if (ord($data[$pos]) == 0) {
return $str;
} else {
$str .= $data[$pos];
}
$pos++;
}
return $str;
}
/*************************************************************/
function & _getFixedString(&$data, $pos, $length = -1) {
if ($length == -1) {
$length = strlen($data) - $pos;
}
$rv = substr($data, $pos, $length);
if (strlen($rv) != $length) {
throw new ErrorException(sprintf(
"JPEGMeta failed parsing image metadata of %s. Got %d instead of %d bytes at offset %d.",
$this->_fileName, strlen($rv), $length, $pos
), 0, E_WARNING);
}
return $rv;
}
/*************************************************************/
function _putString(&$data, $pos, &$str) {
$len = strlen($str);
for ($i = 0; $i < $len; $i++) {
$data[$pos + $i] = $str[$i];
}
return $pos + $len;
}
/*************************************************************/
function _hexDump(&$data, $start = 0, $length = -1) {
if (($length == -1) || (($length + $start) > strlen($data))) {
$end = strlen($data);
} else {
$end = $start + $length;
}
$ascii = '';
$count = 0;
echo "<tt>\n";
while ($start < $end) {
if (($count % 16) == 0) {
echo sprintf('%04d', $count) . ': ';
}
$c = ord($data[$start]);
$count++;
$start++;
$aux = dechex($c);
if (strlen($aux) == 1)
echo '0';
echo $aux . ' ';
if ($c == 60)
$ascii .= '&lt;';
elseif ($c == 62)
$ascii .= '&gt;';
elseif ($c == 32)
$ascii .= '&#160;';
elseif ($c > 32)
$ascii .= chr($c);
else
$ascii .= '.';
if (($count % 4) == 0) {
echo ' - ';
}
if (($count % 16) == 0) {
echo ': ' . $ascii . "<br>\n";
$ascii = '';
}
}
if ($ascii != '') {
while (($count % 16) != 0) {
echo '-- ';
$count++;
if (($count % 4) == 0) {
echo ' - ';
}
}
echo ': ' . $ascii . "<br>\n";
}
echo "</tt>\n";
}
/*****************************************************************/
}
/* vim: set expandtab tabstop=4 shiftwidth=4: */
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