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442 lines
21 KiB
442 lines
21 KiB
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Pdf
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* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id$
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*/
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/** Internally used classes */
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// require_once 'Zend/Pdf/Element/Array.php';
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// require_once 'Zend/Pdf/Element/Name.php';
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// require_once 'Zend/Pdf/Element/Numeric.php';
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/** Zend_Pdf_Resource_Image */
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// require_once 'Zend/Pdf/Resource/Image.php';
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/**
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* TIFF image
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*
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* @package Zend_Pdf
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* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Pdf_Resource_Image_Tiff extends Zend_Pdf_Resource_Image
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{
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const TIFF_FIELD_TYPE_BYTE=1;
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const TIFF_FIELD_TYPE_ASCII=2;
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const TIFF_FIELD_TYPE_SHORT=3;
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const TIFF_FIELD_TYPE_LONG=4;
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const TIFF_FIELD_TYPE_RATIONAL=5;
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const TIFF_TAG_IMAGE_WIDTH=256;
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const TIFF_TAG_IMAGE_LENGTH=257; //Height
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const TIFF_TAG_BITS_PER_SAMPLE=258;
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const TIFF_TAG_COMPRESSION=259;
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const TIFF_TAG_PHOTOMETRIC_INTERPRETATION=262;
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const TIFF_TAG_STRIP_OFFSETS=273;
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const TIFF_TAG_SAMPLES_PER_PIXEL=277;
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const TIFF_TAG_STRIP_BYTE_COUNTS=279;
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const TIFF_COMPRESSION_UNCOMPRESSED = 1;
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const TIFF_COMPRESSION_CCITT1D = 2;
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const TIFF_COMPRESSION_GROUP_3_FAX = 3;
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const TIFF_COMPRESSION_GROUP_4_FAX = 4;
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const TIFF_COMPRESSION_LZW = 5;
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const TIFF_COMPRESSION_JPEG = 6;
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const TIFF_COMPRESSION_FLATE = 8;
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const TIFF_COMPRESSION_FLATE_OBSOLETE_CODE = 32946;
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const TIFF_COMPRESSION_PACKBITS = 32773;
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const TIFF_PHOTOMETRIC_INTERPRETATION_WHITE_IS_ZERO=0;
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const TIFF_PHOTOMETRIC_INTERPRETATION_BLACK_IS_ZERO=1;
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const TIFF_PHOTOMETRIC_INTERPRETATION_RGB=2;
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const TIFF_PHOTOMETRIC_INTERPRETATION_RGB_INDEXED=3;
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const TIFF_PHOTOMETRIC_INTERPRETATION_CMYK=5;
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const TIFF_PHOTOMETRIC_INTERPRETATION_YCBCR=6;
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const TIFF_PHOTOMETRIC_INTERPRETATION_CIELAB=8;
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protected $_width;
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protected $_height;
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protected $_imageProperties;
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protected $_endianType;
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protected $_fileSize;
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protected $_bitsPerSample;
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protected $_compression;
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protected $_filter;
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protected $_colorCode;
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protected $_whiteIsZero;
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protected $_blackIsZero;
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protected $_colorSpace;
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protected $_imageDataOffset;
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protected $_imageDataLength;
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const TIFF_ENDIAN_BIG=0;
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const TIFF_ENDIAN_LITTLE=1;
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const UNPACK_TYPE_BYTE=0;
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const UNPACK_TYPE_SHORT=1;
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const UNPACK_TYPE_LONG=2;
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const UNPACK_TYPE_RATIONAL=3;
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/**
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* Byte unpacking function
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*
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* Makes it possible to unpack bytes in one statement for enhanced logic readability.
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*
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* @param int $type
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* @param string $bytes
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* @throws Zend_Pdf_Exception
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*/
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protected function unpackBytes($type, $bytes) {
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if(!isset($this->_endianType)) {
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// require_once 'Zend/Pdf/Exception.php';
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throw new Zend_Pdf_Exception("The unpackBytes function can only be used after the endianness of the file is known");
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}
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switch($type) {
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case Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_BYTE:
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$format = 'C';
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$unpacked = unpack($format, $bytes);
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return $unpacked[1];
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break;
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case Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_SHORT:
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$format = ($this->_endianType == Zend_Pdf_Resource_Image_Tiff::TIFF_ENDIAN_LITTLE)?'v':'n';
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$unpacked = unpack($format, $bytes);
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return $unpacked[1];
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break;
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case Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_LONG:
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$format = ($this->_endianType == Zend_Pdf_Resource_Image_Tiff::TIFF_ENDIAN_LITTLE)?'V':'N';
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$unpacked = unpack($format, $bytes);
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return $unpacked[1];
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break;
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case Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_RATIONAL:
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$format = ($this->_endianType == Zend_Pdf_Resource_Image_Tiff::TIFF_ENDIAN_LITTLE)?'V2':'N2';
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$unpacked = unpack($format, $bytes);
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return ($unpacked[1]/$unpacked[2]);
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break;
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}
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}
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/**
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* Object constructor
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*
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* @param string $imageFileName
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* @throws Zend_Pdf_Exception
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*/
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public function __construct($imageFileName)
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{
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if (($imageFile = @fopen($imageFileName, 'rb')) === false ) {
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// require_once 'Zend/Pdf/Exception.php';
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throw new Zend_Pdf_Exception( "Can not open '$imageFileName' file for reading." );
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}
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$byteOrderIndicator = fread($imageFile, 2);
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if($byteOrderIndicator == 'II') {
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$this->_endianType = Zend_Pdf_Resource_Image_Tiff::TIFF_ENDIAN_LITTLE;
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} else if($byteOrderIndicator == 'MM') {
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$this->_endianType = Zend_Pdf_Resource_Image_Tiff::TIFF_ENDIAN_BIG;
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} else {
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// require_once 'Zend/Pdf/Exception.php';
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throw new Zend_Pdf_Exception( "Not a tiff file or Tiff corrupt. No byte order indication found" );
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}
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$version = $this->unpackBytes(Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_SHORT, fread($imageFile, 2));
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if($version != 42) {
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// require_once 'Zend/Pdf/Exception.php';
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throw new Zend_Pdf_Exception( "Not a tiff file or Tiff corrupt. Incorrect version number." );
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}
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$ifdOffset = $this->unpackBytes(Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_LONG, fread($imageFile, 4));
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$fileStats = fstat($imageFile);
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$this->_fileSize = $fileStats['size'];
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/*
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* Tiff files are stored as a series of Image File Directories (IFD) each direcctory
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* has a specific number of entries each 12 bytes in length. At the end of the directories
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* is four bytes pointing to the offset of the next IFD.
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*/
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while($ifdOffset > 0) {
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if(fseek($imageFile, $ifdOffset, SEEK_SET) == -1 || $ifdOffset+2 >= $this->_fileSize) {
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// require_once 'Zend/Pdf/Exception.php';
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throw new Zend_Pdf_Exception("Could not seek to the image file directory as indexed by the file. Likely cause is TIFF corruption. Offset: ". $ifdOffset);
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}
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$numDirEntries = $this->unpackBytes(Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_SHORT, fread($imageFile, 2));
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/*
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* Since we now know how many entries are in this (IFD) we can extract the data.
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* The format of a TIFF directory entry is:
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*
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* 2 bytes (short) tag code; See TIFF_TAG constants at the top for supported values. (There are many more in the spec)
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* 2 bytes (short) field type
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* 4 bytes (long) number of values, or value count.
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* 4 bytes (mixed) data if the data will fit into 4 bytes or an offset if the data is too large.
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*/
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for($dirEntryIdx = 1; $dirEntryIdx <= $numDirEntries; $dirEntryIdx++) {
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$tag = $this->unpackBytes(Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_SHORT, fread($imageFile, 2));
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$fieldType = $this->unpackBytes(Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_SHORT, fread($imageFile, 2));
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$valueCount = $this->unpackBytes(Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_LONG, fread($imageFile, 4));
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switch($fieldType) {
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case Zend_Pdf_Resource_Image_Tiff::TIFF_FIELD_TYPE_BYTE:
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$fieldLength = $valueCount;
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break;
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case Zend_Pdf_Resource_Image_Tiff::TIFF_FIELD_TYPE_ASCII:
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$fieldLength = $valueCount;
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break;
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case Zend_Pdf_Resource_Image_Tiff::TIFF_FIELD_TYPE_SHORT:
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$fieldLength = $valueCount * 2;
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break;
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case Zend_Pdf_Resource_Image_Tiff::TIFF_FIELD_TYPE_LONG:
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$fieldLength = $valueCount * 4;
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break;
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case Zend_Pdf_Resource_Image_Tiff::TIFF_FIELD_TYPE_RATIONAL:
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$fieldLength = $valueCount * 8;
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break;
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default:
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$fieldLength = $valueCount;
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}
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$offsetBytes = fread($imageFile, 4);
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if($fieldLength <= 4) {
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switch($fieldType) {
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case Zend_Pdf_Resource_Image_Tiff::TIFF_FIELD_TYPE_BYTE:
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$value = $this->unpackBytes(Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_BYTE, $offsetBytes);
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break;
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case Zend_Pdf_Resource_Image_Tiff::TIFF_FIELD_TYPE_ASCII:
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//Fall through to next case
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case Zend_Pdf_Resource_Image_Tiff::TIFF_FIELD_TYPE_LONG:
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$value = $this->unpackBytes(Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_LONG, $offsetBytes);
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break;
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case Zend_Pdf_Resource_Image_Tiff::TIFF_FIELD_TYPE_SHORT:
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//Fall through to next case
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default:
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$value = $this->unpackBytes(Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_SHORT, $offsetBytes);
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}
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} else {
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$refOffset = $this->unpackBytes(Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_LONG, $offsetBytes);
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}
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/*
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* Linear tag processing is probably not the best way to do this. I've processed the tags according to the
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* Tiff 6 specification and make some assumptions about when tags will be < 4 bytes and fit into $value and when
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* they will be > 4 bytes and require seek/extraction of the offset. Same goes for extracting arrays of data, like
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* the data offsets and length. This should be fixed in the future.
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*/
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switch($tag) {
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case Zend_Pdf_Resource_Image_Tiff::TIFF_TAG_IMAGE_WIDTH:
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$this->_width = $value;
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break;
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case Zend_Pdf_Resource_Image_Tiff::TIFF_TAG_IMAGE_LENGTH:
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$this->_height = $value;
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break;
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case Zend_Pdf_Resource_Image_Tiff::TIFF_TAG_BITS_PER_SAMPLE:
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if($valueCount>1) {
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$fp = ftell($imageFile);
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fseek($imageFile, $refOffset, SEEK_SET);
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$this->_bitsPerSample = $this->unpackBytes(Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_SHORT, fread($imageFile, 2));
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fseek($imageFile, $fp, SEEK_SET);
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} else {
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$this->_bitsPerSample = $value;
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}
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break;
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case Zend_Pdf_Resource_Image_Tiff::TIFF_TAG_COMPRESSION:
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$this->_compression = $value;
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switch($value) {
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case Zend_Pdf_Resource_Image_Tiff::TIFF_COMPRESSION_UNCOMPRESSED:
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$this->_filter = 'None';
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break;
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case Zend_Pdf_Resource_Image_Tiff::TIFF_COMPRESSION_CCITT1D:
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//Fall through to next case
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case Zend_Pdf_Resource_Image_Tiff::TIFF_COMPRESSION_GROUP_3_FAX:
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//Fall through to next case
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case Zend_Pdf_Resource_Image_Tiff::TIFF_COMPRESSION_GROUP_4_FAX:
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$this->_filter = 'CCITTFaxDecode';
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// require_once 'Zend/Pdf/Exception.php';
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throw new Zend_Pdf_Exception("CCITTFaxDecode Compression Mode Not Currently Supported");
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break;
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case Zend_Pdf_Resource_Image_Tiff::TIFF_COMPRESSION_LZW:
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$this->_filter = 'LZWDecode';
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// require_once 'Zend/Pdf/Exception.php';
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throw new Zend_Pdf_Exception("LZWDecode Compression Mode Not Currently Supported");
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break;
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case Zend_Pdf_Resource_Image_Tiff::TIFF_COMPRESSION_JPEG:
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$this->_filter = 'DCTDecode'; //Should work, doesnt...
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// require_once 'Zend/Pdf/Exception.php';
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throw new Zend_Pdf_Exception("JPEG Compression Mode Not Currently Supported");
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break;
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case Zend_Pdf_Resource_Image_Tiff::TIFF_COMPRESSION_FLATE:
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//fall through to next case
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case Zend_Pdf_Resource_Image_Tiff::TIFF_COMPRESSION_FLATE_OBSOLETE_CODE:
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$this->_filter = 'FlateDecode';
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// require_once 'Zend/Pdf/Exception.php';
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throw new Zend_Pdf_Exception("ZIP/Flate Compression Mode Not Currently Supported");
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break;
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case Zend_Pdf_Resource_Image_Tiff::TIFF_COMPRESSION_PACKBITS:
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$this->_filter = 'RunLengthDecode';
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break;
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}
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break;
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case Zend_Pdf_Resource_Image_Tiff::TIFF_TAG_PHOTOMETRIC_INTERPRETATION:
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$this->_colorCode = $value;
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$this->_whiteIsZero = false;
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$this->_blackIsZero = false;
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switch($value) {
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case Zend_Pdf_Resource_Image_Tiff::TIFF_PHOTOMETRIC_INTERPRETATION_WHITE_IS_ZERO:
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$this->_whiteIsZero = true;
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$this->_colorSpace = 'DeviceGray';
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break;
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case Zend_Pdf_Resource_Image_Tiff::TIFF_PHOTOMETRIC_INTERPRETATION_BLACK_IS_ZERO:
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$this->_blackIsZero = true;
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$this->_colorSpace = 'DeviceGray';
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break;
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case Zend_Pdf_Resource_Image_Tiff::TIFF_PHOTOMETRIC_INTERPRETATION_YCBCR:
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//fall through to next case
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case Zend_Pdf_Resource_Image_Tiff::TIFF_PHOTOMETRIC_INTERPRETATION_RGB:
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$this->_colorSpace = 'DeviceRGB';
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break;
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case Zend_Pdf_Resource_Image_Tiff::TIFF_PHOTOMETRIC_INTERPRETATION_RGB_INDEXED:
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$this->_colorSpace = 'Indexed';
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break;
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case Zend_Pdf_Resource_Image_Tiff::TIFF_PHOTOMETRIC_INTERPRETATION_CMYK:
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$this->_colorSpace = 'DeviceCMYK';
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break;
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case Zend_Pdf_Resource_Image_Tiff::TIFF_PHOTOMETRIC_INTERPRETATION_CIELAB:
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$this->_colorSpace = 'Lab';
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break;
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default:
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// require_once 'Zend/Pdf/Exception.php';
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throw new Zend_Pdf_Exception('TIFF: Unknown or Unsupported Color Type: '. $value);
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}
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break;
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case Zend_Pdf_Resource_Image_Tiff::TIFF_TAG_STRIP_OFFSETS:
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if($valueCount>1) {
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$format = ($this->_endianType == Zend_Pdf_Resource_Image_Tiff::TIFF_ENDIAN_LITTLE)?'V*':'N*';
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$fp = ftell($imageFile);
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fseek($imageFile, $refOffset, SEEK_SET);
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$stripOffsetsBytes = fread($imageFile, $fieldLength);
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$this->_imageDataOffset = unpack($format, $stripOffsetsBytes);
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fseek($imageFile, $fp, SEEK_SET);
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} else {
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$this->_imageDataOffset = $value;
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}
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break;
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case Zend_Pdf_Resource_Image_Tiff::TIFF_TAG_STRIP_BYTE_COUNTS:
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if($valueCount>1) {
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$format = ($this->_endianType == Zend_Pdf_Resource_Image_Tiff::TIFF_ENDIAN_LITTLE)?'V*':'N*';
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$fp = ftell($imageFile);
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fseek($imageFile, $refOffset, SEEK_SET);
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$stripByteCountsBytes = fread($imageFile, $fieldLength);
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$this->_imageDataLength = unpack($format, $stripByteCountsBytes);
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fseek($imageFile, $fp, SEEK_SET);
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} else {
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$this->_imageDataLength = $value;
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}
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break;
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default:
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//For debugging. It should be harmless to ignore unknown tags, though there is some good info in them.
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//echo "Unknown tag detected: ". $tag . " value: ". $value;
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}
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}
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$ifdOffset = $this->unpackBytes(Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_LONG, fread($imageFile, 4));
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}
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if(!isset($this->_imageDataOffset) || !isset($this->_imageDataLength)) {
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// require_once 'Zend/Pdf/Exception.php';
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throw new Zend_Pdf_Exception("TIFF: The image processed did not contain image data as expected.");
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}
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$imageDataBytes = '';
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if(is_array($this->_imageDataOffset)) {
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if(!is_array($this->_imageDataLength)) {
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// require_once 'Zend/Pdf/Exception.php';
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throw new Zend_Pdf_Exception("TIFF: The image contained multiple data offsets but not multiple data lengths. Tiff may be corrupt.");
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}
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foreach($this->_imageDataOffset as $idx => $offset) {
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fseek($imageFile, $this->_imageDataOffset[$idx], SEEK_SET);
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$imageDataBytes .= fread($imageFile, $this->_imageDataLength[$idx]);
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}
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} else {
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fseek($imageFile, $this->_imageDataOffset, SEEK_SET);
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$imageDataBytes = fread($imageFile, $this->_imageDataLength);
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}
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if($imageDataBytes === '') {
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// require_once 'Zend/Pdf/Exception.php';
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throw new Zend_Pdf_Exception("TIFF: No data. Image Corruption");
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}
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fclose($imageFile);
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parent::__construct();
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$imageDictionary = $this->_resource->dictionary;
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if(!isset($this->_width) || !isset($this->_width)) {
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// require_once 'Zend/Pdf/Exception.php';
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throw new Zend_Pdf_Exception("Problem reading tiff file. Tiff is probably corrupt.");
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}
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$this->_imageProperties = array();
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$this->_imageProperties['bitDepth'] = $this->_bitsPerSample;
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$this->_imageProperties['fileSize'] = $this->_fileSize;
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$this->_imageProperties['TIFFendianType'] = $this->_endianType;
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$this->_imageProperties['TIFFcompressionType'] = $this->_compression;
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$this->_imageProperties['TIFFwhiteIsZero'] = $this->_whiteIsZero;
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$this->_imageProperties['TIFFblackIsZero'] = $this->_blackIsZero;
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$this->_imageProperties['TIFFcolorCode'] = $this->_colorCode;
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$this->_imageProperties['TIFFimageDataOffset'] = $this->_imageDataOffset;
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$this->_imageProperties['TIFFimageDataLength'] = $this->_imageDataLength;
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$this->_imageProperties['PDFfilter'] = $this->_filter;
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$this->_imageProperties['PDFcolorSpace'] = $this->_colorSpace;
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$imageDictionary->Width = new Zend_Pdf_Element_Numeric($this->_width);
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if($this->_whiteIsZero === true) {
|
|
$imageDictionary->Decode = new Zend_Pdf_Element_Array(array(new Zend_Pdf_Element_Numeric(1), new Zend_Pdf_Element_Numeric(0)));
|
|
}
|
|
$imageDictionary->Height = new Zend_Pdf_Element_Numeric($this->_height);
|
|
$imageDictionary->ColorSpace = new Zend_Pdf_Element_Name($this->_colorSpace);
|
|
$imageDictionary->BitsPerComponent = new Zend_Pdf_Element_Numeric($this->_bitsPerSample);
|
|
if(isset($this->_filter) && $this->_filter != 'None') {
|
|
$imageDictionary->Filter = new Zend_Pdf_Element_Name($this->_filter);
|
|
}
|
|
|
|
$this->_resource->value = $imageDataBytes;
|
|
$this->_resource->skipFilters();
|
|
}
|
|
/**
|
|
* Image width (defined in Zend_Pdf_Resource_Image_Interface)
|
|
*/
|
|
public function getPixelWidth() {
|
|
return $this->_width;
|
|
}
|
|
|
|
/**
|
|
* Image height (defined in Zend_Pdf_Resource_Image_Interface)
|
|
*/
|
|
public function getPixelHeight() {
|
|
return $this->_height;
|
|
}
|
|
|
|
/**
|
|
* Image properties (defined in Zend_Pdf_Resource_Image_Interface)
|
|
*/
|
|
public function getProperties() {
|
|
return $this->_imageProperties;
|
|
}
|
|
}
|
|
|