--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/web/enmi/Zend/Pdf/Resource/Image/Tiff.php Thu Jan 20 19:30:54 2011 +0100
@@ -0,0 +1,442 @@
+<?php
+/**
+ * Zend Framework
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://framework.zend.com/license/new-bsd
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@zend.com so we can send you a copy immediately.
+ *
+ * @category Zend
+ * @package Zend_Pdf
+ * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license http://framework.zend.com/license/new-bsd New BSD License
+ * @version $Id: Tiff.php 20096 2010-01-06 02:05:09Z bkarwin $
+ */
+
+/** Internally used classes */
+require_once 'Zend/Pdf/Element/Array.php';
+require_once 'Zend/Pdf/Element/Name.php';
+require_once 'Zend/Pdf/Element/Numeric.php';
+
+
+/** Zend_Pdf_Resource_Image */
+require_once 'Zend/Pdf/Resource/Image.php';
+
+/**
+ * TIFF image
+ *
+ * @package Zend_Pdf
+ * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license http://framework.zend.com/license/new-bsd New BSD License
+ */
+class Zend_Pdf_Resource_Image_Tiff extends Zend_Pdf_Resource_Image
+{
+ const TIFF_FIELD_TYPE_BYTE=1;
+ const TIFF_FIELD_TYPE_ASCII=2;
+ const TIFF_FIELD_TYPE_SHORT=3;
+ const TIFF_FIELD_TYPE_LONG=4;
+ const TIFF_FIELD_TYPE_RATIONAL=5;
+
+ const TIFF_TAG_IMAGE_WIDTH=256;
+ const TIFF_TAG_IMAGE_LENGTH=257; //Height
+ const TIFF_TAG_BITS_PER_SAMPLE=258;
+ const TIFF_TAG_COMPRESSION=259;
+ const TIFF_TAG_PHOTOMETRIC_INTERPRETATION=262;
+ const TIFF_TAG_STRIP_OFFSETS=273;
+ const TIFF_TAG_SAMPLES_PER_PIXEL=277;
+ const TIFF_TAG_STRIP_BYTE_COUNTS=279;
+
+ const TIFF_COMPRESSION_UNCOMPRESSED = 1;
+ const TIFF_COMPRESSION_CCITT1D = 2;
+ const TIFF_COMPRESSION_GROUP_3_FAX = 3;
+ const TIFF_COMPRESSION_GROUP_4_FAX = 4;
+ const TIFF_COMPRESSION_LZW = 5;
+ const TIFF_COMPRESSION_JPEG = 6;
+ const TIFF_COMPRESSION_FLATE = 8;
+ const TIFF_COMPRESSION_FLATE_OBSOLETE_CODE = 32946;
+ const TIFF_COMPRESSION_PACKBITS = 32773;
+
+ const TIFF_PHOTOMETRIC_INTERPRETATION_WHITE_IS_ZERO=0;
+ const TIFF_PHOTOMETRIC_INTERPRETATION_BLACK_IS_ZERO=1;
+ const TIFF_PHOTOMETRIC_INTERPRETATION_RGB=2;
+ const TIFF_PHOTOMETRIC_INTERPRETATION_RGB_INDEXED=3;
+ const TIFF_PHOTOMETRIC_INTERPRETATION_CMYK=5;
+ const TIFF_PHOTOMETRIC_INTERPRETATION_YCBCR=6;
+ const TIFF_PHOTOMETRIC_INTERPRETATION_CIELAB=8;
+
+ protected $_width;
+ protected $_height;
+ protected $_imageProperties;
+ protected $_endianType;
+ protected $_fileSize;
+ protected $_bitsPerSample;
+ protected $_compression;
+ protected $_filter;
+ protected $_colorCode;
+ protected $_whiteIsZero;
+ protected $_blackIsZero;
+ protected $_colorSpace;
+ protected $_imageDataOffset;
+ protected $_imageDataLength;
+
+ const TIFF_ENDIAN_BIG=0;
+ const TIFF_ENDIAN_LITTLE=1;
+
+ const UNPACK_TYPE_BYTE=0;
+ const UNPACK_TYPE_SHORT=1;
+ const UNPACK_TYPE_LONG=2;
+ const UNPACK_TYPE_RATIONAL=3;
+
+ /**
+ * Byte unpacking function
+ *
+ * Makes it possible to unpack bytes in one statement for enhanced logic readability.
+ *
+ * @param int $type
+ * @param string $bytes
+ * @throws Zend_Pdf_Exception
+ */
+ protected function unpackBytes($type, $bytes) {
+ if(!isset($this->_endianType)) {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception("The unpackBytes function can only be used after the endianness of the file is known");
+ }
+ switch($type) {
+ case Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_BYTE:
+ $format = 'C';
+ $unpacked = unpack($format, $bytes);
+ return $unpacked[1];
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_SHORT:
+ $format = ($this->_endianType == Zend_Pdf_Resource_Image_Tiff::TIFF_ENDIAN_LITTLE)?'v':'n';
+ $unpacked = unpack($format, $bytes);
+ return $unpacked[1];
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_LONG:
+ $format = ($this->_endianType == Zend_Pdf_Resource_Image_Tiff::TIFF_ENDIAN_LITTLE)?'V':'N';
+ $unpacked = unpack($format, $bytes);
+ return $unpacked[1];
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_RATIONAL:
+ $format = ($this->_endianType == Zend_Pdf_Resource_Image_Tiff::TIFF_ENDIAN_LITTLE)?'V2':'N2';
+ $unpacked = unpack($format, $bytes);
+ return ($unpacked[1]/$unpacked[2]);
+ break;
+ }
+ }
+
+ /**
+ * Object constructor
+ *
+ * @param string $imageFileName
+ * @throws Zend_Pdf_Exception
+ */
+ public function __construct($imageFileName)
+ {
+ if (($imageFile = @fopen($imageFileName, 'rb')) === false ) {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception( "Can not open '$imageFileName' file for reading." );
+ }
+
+ $byteOrderIndicator = fread($imageFile, 2);
+ if($byteOrderIndicator == 'II') {
+ $this->_endianType = Zend_Pdf_Resource_Image_Tiff::TIFF_ENDIAN_LITTLE;
+ } else if($byteOrderIndicator == 'MM') {
+ $this->_endianType = Zend_Pdf_Resource_Image_Tiff::TIFF_ENDIAN_BIG;
+ } else {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception( "Not a tiff file or Tiff corrupt. No byte order indication found" );
+ }
+
+ $version = $this->unpackBytes(Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_SHORT, fread($imageFile, 2));
+
+ if($version != 42) {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception( "Not a tiff file or Tiff corrupt. Incorrect version number." );
+ }
+ $ifdOffset = $this->unpackBytes(Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_LONG, fread($imageFile, 4));
+
+ $fileStats = fstat($imageFile);
+ $this->_fileSize = $fileStats['size'];
+
+ /*
+ * Tiff files are stored as a series of Image File Directories (IFD) each direcctory
+ * has a specific number of entries each 12 bytes in length. At the end of the directories
+ * is four bytes pointing to the offset of the next IFD.
+ */
+
+ while($ifdOffset > 0) {
+ if(fseek($imageFile, $ifdOffset, SEEK_SET) == -1 || $ifdOffset+2 >= $this->_fileSize) {
+ require_once 'Zend/Pdf/Exception.php';
+ 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);
+ }
+
+ $numDirEntries = $this->unpackBytes(Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_SHORT, fread($imageFile, 2));
+
+ /*
+ * Since we now know how many entries are in this (IFD) we can extract the data.
+ * The format of a TIFF directory entry is:
+ *
+ * 2 bytes (short) tag code; See TIFF_TAG constants at the top for supported values. (There are many more in the spec)
+ * 2 bytes (short) field type
+ * 4 bytes (long) number of values, or value count.
+ * 4 bytes (mixed) data if the data will fit into 4 bytes or an offset if the data is too large.
+ */
+ for($dirEntryIdx = 1; $dirEntryIdx <= $numDirEntries; $dirEntryIdx++) {
+ $tag = $this->unpackBytes(Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_SHORT, fread($imageFile, 2));
+ $fieldType = $this->unpackBytes(Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_SHORT, fread($imageFile, 2));
+ $valueCount = $this->unpackBytes(Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_LONG, fread($imageFile, 4));
+
+ switch($fieldType) {
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_FIELD_TYPE_BYTE:
+ $fieldLength = $valueCount;
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_FIELD_TYPE_ASCII:
+ $fieldLength = $valueCount;
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_FIELD_TYPE_SHORT:
+ $fieldLength = $valueCount * 2;
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_FIELD_TYPE_LONG:
+ $fieldLength = $valueCount * 4;
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_FIELD_TYPE_RATIONAL:
+ $fieldLength = $valueCount * 8;
+ break;
+ default:
+ $fieldLength = $valueCount;
+ }
+
+ $offsetBytes = fread($imageFile, 4);
+
+ if($fieldLength <= 4) {
+ switch($fieldType) {
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_FIELD_TYPE_BYTE:
+ $value = $this->unpackBytes(Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_BYTE, $offsetBytes);
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_FIELD_TYPE_ASCII:
+ //Fall through to next case
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_FIELD_TYPE_LONG:
+ $value = $this->unpackBytes(Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_LONG, $offsetBytes);
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_FIELD_TYPE_SHORT:
+ //Fall through to next case
+ default:
+ $value = $this->unpackBytes(Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_SHORT, $offsetBytes);
+ }
+ } else {
+ $refOffset = $this->unpackBytes(Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_LONG, $offsetBytes);
+ }
+ /*
+ * Linear tag processing is probably not the best way to do this. I've processed the tags according to the
+ * Tiff 6 specification and make some assumptions about when tags will be < 4 bytes and fit into $value and when
+ * they will be > 4 bytes and require seek/extraction of the offset. Same goes for extracting arrays of data, like
+ * the data offsets and length. This should be fixed in the future.
+ */
+ switch($tag) {
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_TAG_IMAGE_WIDTH:
+ $this->_width = $value;
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_TAG_IMAGE_LENGTH:
+ $this->_height = $value;
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_TAG_BITS_PER_SAMPLE:
+ if($valueCount>1) {
+ $fp = ftell($imageFile);
+ fseek($imageFile, $refOffset, SEEK_SET);
+ $this->_bitsPerSample = $this->unpackBytes(Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_SHORT, fread($imageFile, 2));
+ fseek($imageFile, $fp, SEEK_SET);
+ } else {
+ $this->_bitsPerSample = $value;
+ }
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_TAG_COMPRESSION:
+ $this->_compression = $value;
+ switch($value) {
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_COMPRESSION_UNCOMPRESSED:
+ $this->_filter = 'None';
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_COMPRESSION_CCITT1D:
+ //Fall through to next case
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_COMPRESSION_GROUP_3_FAX:
+ //Fall through to next case
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_COMPRESSION_GROUP_4_FAX:
+ $this->_filter = 'CCITTFaxDecode';
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception("CCITTFaxDecode Compression Mode Not Currently Supported");
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_COMPRESSION_LZW:
+ $this->_filter = 'LZWDecode';
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception("LZWDecode Compression Mode Not Currently Supported");
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_COMPRESSION_JPEG:
+ $this->_filter = 'DCTDecode'; //Should work, doesnt...
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception("JPEG Compression Mode Not Currently Supported");
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_COMPRESSION_FLATE:
+ //fall through to next case
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_COMPRESSION_FLATE_OBSOLETE_CODE:
+ $this->_filter = 'FlateDecode';
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception("ZIP/Flate Compression Mode Not Currently Supported");
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_COMPRESSION_PACKBITS:
+ $this->_filter = 'RunLengthDecode';
+ break;
+ }
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_TAG_PHOTOMETRIC_INTERPRETATION:
+ $this->_colorCode = $value;
+ $this->_whiteIsZero = false;
+ $this->_blackIsZero = false;
+ switch($value) {
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_PHOTOMETRIC_INTERPRETATION_WHITE_IS_ZERO:
+ $this->_whiteIsZero = true;
+ $this->_colorSpace = 'DeviceGray';
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_PHOTOMETRIC_INTERPRETATION_BLACK_IS_ZERO:
+ $this->_blackIsZero = true;
+ $this->_colorSpace = 'DeviceGray';
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_PHOTOMETRIC_INTERPRETATION_YCBCR:
+ //fall through to next case
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_PHOTOMETRIC_INTERPRETATION_RGB:
+ $this->_colorSpace = 'DeviceRGB';
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_PHOTOMETRIC_INTERPRETATION_RGB_INDEXED:
+ $this->_colorSpace = 'Indexed';
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_PHOTOMETRIC_INTERPRETATION_CMYK:
+ $this->_colorSpace = 'DeviceCMYK';
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_PHOTOMETRIC_INTERPRETATION_CIELAB:
+ $this->_colorSpace = 'Lab';
+ break;
+ default:
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception('TIFF: Unknown or Unsupported Color Type: '. $value);
+ }
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_TAG_STRIP_OFFSETS:
+ if($valueCount>1) {
+ $format = ($this->_endianType == Zend_Pdf_Resource_Image_Tiff::TIFF_ENDIAN_LITTLE)?'V*':'N*';
+ $fp = ftell($imageFile);
+ fseek($imageFile, $refOffset, SEEK_SET);
+ $stripOffsetsBytes = fread($imageFile, $fieldLength);
+ $this->_imageDataOffset = unpack($format, $stripOffsetsBytes);
+ fseek($imageFile, $fp, SEEK_SET);
+ } else {
+ $this->_imageDataOffset = $value;
+ }
+ break;
+ case Zend_Pdf_Resource_Image_Tiff::TIFF_TAG_STRIP_BYTE_COUNTS:
+ if($valueCount>1) {
+ $format = ($this->_endianType == Zend_Pdf_Resource_Image_Tiff::TIFF_ENDIAN_LITTLE)?'V*':'N*';
+ $fp = ftell($imageFile);
+ fseek($imageFile, $refOffset, SEEK_SET);
+ $stripByteCountsBytes = fread($imageFile, $fieldLength);
+ $this->_imageDataLength = unpack($format, $stripByteCountsBytes);
+ fseek($imageFile, $fp, SEEK_SET);
+ } else {
+ $this->_imageDataLength = $value;
+ }
+ break;
+ default:
+ //For debugging. It should be harmless to ignore unknown tags, though there is some good info in them.
+ //echo "Unknown tag detected: ". $tag . " value: ". $value;
+ }
+ }
+ $ifdOffset = $this->unpackBytes(Zend_Pdf_Resource_Image_Tiff::UNPACK_TYPE_LONG, fread($imageFile, 4));
+ }
+
+ if(!isset($this->_imageDataOffset) || !isset($this->_imageDataLength)) {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception("TIFF: The image processed did not contain image data as expected.");
+ }
+
+ $imageDataBytes = '';
+ if(is_array($this->_imageDataOffset)) {
+ if(!is_array($this->_imageDataLength)) {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception("TIFF: The image contained multiple data offsets but not multiple data lengths. Tiff may be corrupt.");
+ }
+ foreach($this->_imageDataOffset as $idx => $offset) {
+ fseek($imageFile, $this->_imageDataOffset[$idx], SEEK_SET);
+ $imageDataBytes .= fread($imageFile, $this->_imageDataLength[$idx]);
+ }
+ } else {
+ fseek($imageFile, $this->_imageDataOffset, SEEK_SET);
+ $imageDataBytes = fread($imageFile, $this->_imageDataLength);
+ }
+ if($imageDataBytes === '') {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception("TIFF: No data. Image Corruption");
+ }
+
+ fclose($imageFile);
+
+ parent::__construct();
+
+ $imageDictionary = $this->_resource->dictionary;
+ if(!isset($this->_width) || !isset($this->_width)) {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception("Problem reading tiff file. Tiff is probably corrupt.");
+ }
+
+ $this->_imageProperties = array();
+ $this->_imageProperties['bitDepth'] = $this->_bitsPerSample;
+ $this->_imageProperties['fileSize'] = $this->_fileSize;
+ $this->_imageProperties['TIFFendianType'] = $this->_endianType;
+ $this->_imageProperties['TIFFcompressionType'] = $this->_compression;
+ $this->_imageProperties['TIFFwhiteIsZero'] = $this->_whiteIsZero;
+ $this->_imageProperties['TIFFblackIsZero'] = $this->_blackIsZero;
+ $this->_imageProperties['TIFFcolorCode'] = $this->_colorCode;
+ $this->_imageProperties['TIFFimageDataOffset'] = $this->_imageDataOffset;
+ $this->_imageProperties['TIFFimageDataLength'] = $this->_imageDataLength;
+ $this->_imageProperties['PDFfilter'] = $this->_filter;
+ $this->_imageProperties['PDFcolorSpace'] = $this->_colorSpace;
+
+ $imageDictionary->Width = new Zend_Pdf_Element_Numeric($this->_width);
+ 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;
+ }
+}
+