diff options
Diffstat (limited to 'wiki/inc/JpegMeta.php')
| -rw-r--r-- | wiki/inc/JpegMeta.php | 3188 |
1 files changed, 3188 insertions, 0 deletions
diff --git a/wiki/inc/JpegMeta.php b/wiki/inc/JpegMeta.php new file mode 100644 index 0000000..94c276c --- /dev/null +++ b/wiki/inc/JpegMeta.php @@ -0,0 +1,3188 @@ +<?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 $field){ + if(strtolower(substr($field,0,5)) == 'iptc.'){ + $info = $this->getIPTCField(substr($field,5)); + }elseif(strtolower(substr($field,0,5)) == 'exif.'){ + $info = $this->getExifField(substr($field,5)); + }elseif(strtolower(substr($field,0,4)) == 'xmp.'){ + $info = $this->getXmpField(substr($field,4)); + }elseif(strtolower(substr($field,0,5)) == 'file.'){ + $info = $this->getFileField(substr($field,5)); + }elseif(strtolower(substr($field,0,5)) == 'date.'){ + $info = $this->getDateField(substr($field,5)); + }elseif(strtolower($field) == 'simple.camera'){ + $info = $this->getCamera(); + }elseif(strtolower($field) == 'simple.raw'){ + return $this->getRawInfo(); + }elseif(strtolower($field) == 'simple.title'){ + $info = $this->getTitle(); + }elseif(strtolower($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{ + $info = join(', ',$info); + } + } + 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, $value) { + if(strtolower(substr($field,0,5)) == 'iptc.'){ + return $this->setIPTCField(substr($field,5),$value); + }elseif(strtolower(substr($field,0,5)) == '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) { + if(strtolower(substr($field,0,5)) == 'iptc.'){ + return $this->deleteIPTCField(substr($field,5)); + }elseif(strtolower(substr($field,0,5)) == '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 && strtolower(substr($field, 0, 8)) == 'datetime') { + if(strlen($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']['DateTime']; + + $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']['DateTime']; + + $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(); + $this->_info['file']['Name'] = utf8_decodeFN(utf8_basename($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 + $size = getimagesize($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(); + $this->_info['file']['Name'] = utf8_basename($this->_fileName); + $this->_info['file']['Url'] = $this->_fileName; + } + + return true; + } + + /*************************************************************/ + function _parseMarkerJFIF() { + if (!isset($this->_markers)) { + $this->_readJPEG(); + } + + if ($this->_markers == null) { + return false; + } + + $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'] = $thumby; + + return true; + } + + /*************************************************************/ + function _parseMarkerSOF() { + if (!isset($this->_markers)) { + $this->_readJPEG(); + } + + if ($this->_markers == null) { + return false; + } + + $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, $pos + 5); + + return true; + } + + /** + * Parses the XMP data + * + * @author Hakan Sandell <hakan.sandell@mydata.se> + */ + function _parseMarkerXmp() { + if (!isset($this->_markers)) { + $this->_readJPEG(); + } + + if ($this->_markers == null) { + return false; + } + + $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); + } + } + } + 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) { + return false; + } + + $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'); + + 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 $ifdEntries; + } + + /*************************************************************/ + function _parseMarkerAdobe() { + if (!isset($this->_markers)) { + $this->_readJPEG(); + } + + if ($this->_markers == null) { + return false; + } + + $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 + } + + } + + /*************************************************************/ + 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 (substr($label, 0, 7) == "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, $pos) { + return ord($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, $bigEndian = true) { + if ($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, $bigEndian = true) { + if ($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 < $max) { + if (ord($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); + 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) + $ascii .= '<'; + elseif ($c == 62) + $ascii .= '>'; + elseif ($c == 32) + $ascii .= ' '; + elseif ($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: */ |