Rev 3857 | Blame | Compare with Previous | Last modification | View Log | RSS feed
<?php//============================================================+// File name : tcpdf_images.php// Version : 1.0.000// Begin : 2002-08-03// Last Update : 2013-03-16// Author : Nicola Asuni - Tecnick.com LTD - www.tecnick.com - info@tecnick.com// License : GNU-LGPL v3 (http://www.gnu.org/copyleft/lesser.html)// -------------------------------------------------------------------// Copyright (C) 2002-2013 Nicola Asuni - Tecnick.com LTD//// This file is part of TCPDF software library.//// TCPDF is free software: you can redistribute it and/or modify it// under the terms of the GNU Lesser General Public License as// published by the Free Software Foundation, either version 3 of the// License, or (at your option) any later version.//// TCPDF is distributed in the hope that it will be useful, but// WITHOUT ANY WARRANTY; without even the implied warranty of// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.// See the GNU Lesser General Public License for more details.//// You should have received a copy of the License// along with TCPDF. If not, see// <http://www.tecnick.com/pagefiles/tcpdf/LICENSE.TXT>.//// See LICENSE.TXT file for more information.// -------------------------------------------------------------------//// Description :// Static image methods used by the TCPDF class.////============================================================+/*** @file* This is a PHP class that contains static image methods for the TCPDF class.<br>* @package com.tecnick.tcpdf* @author Nicola Asuni* @version 1.0.000*//*** @class TCPDF_IMAGES* Static image methods used by the TCPDF class.* @package com.tecnick.tcpdf* @brief PHP class for generating PDF documents without requiring external extensions.* @version 1.0.000* @author Nicola Asuni - info@tecnick.com*/class TCPDF_IMAGES {/*** Array of hinheritable SVG properties.* @since 5.0.000 (2010-05-02)* @public static*/public static $svginheritprop = array('clip-rule', 'color', 'color-interpolation', 'color-interpolation-filters', 'color-profile', 'color-rendering', 'cursor', 'direction', 'fill', 'fill-opacity', 'fill-rule', 'font', 'font-family', 'font-size', 'font-size-adjust', 'font-stretch', 'font-style', 'font-variant', 'font-weight', 'glyph-orientation-horizontal', 'glyph-orientation-vertical', 'image-rendering', 'kerning', 'letter-spacing', 'marker', 'marker-end', 'marker-mid', 'marker-start', 'pointer-events', 'shape-rendering', 'stroke', 'stroke-dasharray', 'stroke-dashoffset', 'stroke-linecap', 'stroke-linejoin', 'stroke-miterlimit', 'stroke-opacity', 'stroke-width', 'text-anchor', 'text-rendering', 'visibility', 'word-spacing', 'writing-mode');// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -/*** Return the image type given the file name or array returned by getimagesize() function.* @param $imgfile (string) image file name* @param $iminfo (array) array of image information returned by getimagesize() function.* @return string image type* @since 4.8.017 (2009-11-27)* @public static*/public static function getImageFileType($imgfile, $iminfo=array()) {$type = '';if (isset($iminfo['mime']) AND !empty($iminfo['mime'])) {$mime = explode('/', $iminfo['mime']);if ((count($mime) > 1) AND ($mime[0] == 'image') AND (!empty($mime[1]))) {$type = strtolower(trim($mime[1]));}}if (empty($type)) {$fileinfo = pathinfo($imgfile);if (isset($fileinfo['extension']) AND (!TCPDF_STATIC::empty_string($fileinfo['extension']))) {$type = strtolower(trim($fileinfo['extension']));}}if ($type == 'jpg') {$type = 'jpeg';}return $type;}/*** Set the transparency for the given GD image.* @param $new_image (image) GD image object* @param $image (image) GD image object.* return GD image object.* @since 4.9.016 (2010-04-20)* @public static*/public static function setGDImageTransparency($new_image, $image) {// transparency index$tid = imagecolortransparent($image);// default transparency color$tcol = array('red' => 255, 'green' => 255, 'blue' => 255);if ($tid >= 0) {// get the colors for the transparency index$tcol = imagecolorsforindex($image, $tid);}$tid = imagecolorallocate($new_image, $tcol['red'], $tcol['green'], $tcol['blue']);imagefill($new_image, 0, 0, $tid);imagecolortransparent($new_image, $tid);return $new_image;}/*** Convert the loaded image to a PNG and then return a structure for the PDF creator.* This function requires GD library and write access to the directory defined on K_PATH_CACHE constant.* @param $image (image) Image object.* return image PNG image object.* @since 4.9.016 (2010-04-20)* @public static*/public static function _toPNG($image) {// set temporary image file name$tempname = TCPDF_STATIC::getObjFilename('png');// turn off interlaced modeimageinterlace($image, 0);// create temporary PNG imageimagepng($image, $tempname);// remove image from memoryimagedestroy($image);// get PNG image data$retvars = self::_parsepng($tempname);// tidy up by removing temporary imageunlink($tempname);return $retvars;}/*** Convert the loaded image to a JPEG and then return a structure for the PDF creator.* This function requires GD library and write access to the directory defined on K_PATH_CACHE constant.* @param $image (image) Image object.* @param $quality (int) JPEG quality.* return image JPEG image object.* @public static*/public static function _toJPEG($image, $quality) {$tempname = TCPDF_STATIC::getObjFilename('jpg');imagejpeg($image, $tempname, $quality);imagedestroy($image);$retvars = self::_parsejpeg($tempname);// tidy up by removing temporary imageunlink($tempname);return $retvars;}/*** Extract info from a JPEG file without using the GD library.* @param $file (string) image file to parse* @return array structure containing the image data* @public static*/public static function _parsejpeg($file) {$a = getimagesize($file);if (empty($a)) {//Missing or incorrect image filereturn false;}if ($a[2] != 2) {// Not a JPEG filereturn false;}// bits per pixel$bpc = isset($a['bits']) ? intval($a['bits']) : 8;// number of image channelsif (!isset($a['channels'])) {$channels = 3;} else {$channels = intval($a['channels']);}// default colour spaceswitch ($channels) {case 1: {$colspace = 'DeviceGray';break;}case 3: {$colspace = 'DeviceRGB';break;}case 4: {$colspace = 'DeviceCMYK';break;}default: {$channels = 3;$colspace = 'DeviceRGB';break;}}// get file content$data = file_get_contents($file);// check for embedded ICC profile$icc = array();$offset = 0;while (($pos = strpos($data, "ICC_PROFILE\0", $offset)) !== false) {// get ICC sequence length$length = (TCPDF_STATIC::_getUSHORT($data, ($pos - 2)) - 16);// marker sequence number$msn = max(1, ord($data[($pos + 12)]));// number of markers (total of APP2 used)$nom = max(1, ord($data[($pos + 13)]));// get sequence segment$icc[($msn - 1)] = substr($data, ($pos + 14), $length);// move forward to next sequence$offset = ($pos + 14 + $length);}// order and compact ICC segmentsif (count($icc) > 0) {ksort($icc);$icc = implode('', $icc);if ((ord($icc{36}) != 0x61) OR (ord($icc{37}) != 0x63) OR (ord($icc{38}) != 0x73) OR (ord($icc{39}) != 0x70)) {// invalid ICC profile$icc = false;}} else {$icc = false;}return array('w' => $a[0], 'h' => $a[1], 'ch' => $channels, 'icc' => $icc, 'cs' => $colspace, 'bpc' => $bpc, 'f' => 'DCTDecode', 'data' => $data);}/*** Extract info from a PNG file without using the GD library.* @param $file (string) image file to parse* @return array structure containing the image data* @public static*/public static function _parsepng($file) {$f = fopen($file, 'rb');if ($f === false) {// Can't open image filereturn false;}//Check signatureif (fread($f, 8) != chr(137).'PNG'.chr(13).chr(10).chr(26).chr(10)) {// Not a PNG filereturn false;}//Read header chunkfread($f, 4);if (fread($f, 4) != 'IHDR') {//Incorrect PNG filereturn false;}$w = TCPDF_STATIC::_freadint($f);$h = TCPDF_STATIC::_freadint($f);$bpc = ord(fread($f, 1));if ($bpc > 8) {// 16-bit depth not supportedfclose($f);return false;}$ct = ord(fread($f, 1));if ($ct == 0) {$colspace = 'DeviceGray';} elseif ($ct == 2) {$colspace = 'DeviceRGB';} elseif ($ct == 3) {$colspace = 'Indexed';} else {// alpha channelfclose($f);return 'pngalpha';}if (ord(fread($f, 1)) != 0) {// Unknown compression methodfclose($f);return false;}if (ord(fread($f, 1)) != 0) {// Unknown filter methodfclose($f);return false;}if (ord(fread($f, 1)) != 0) {// Interlacing not supportedfclose($f);return false;}fread($f, 4);$channels = ($ct == 2 ? 3 : 1);$parms = '/DecodeParms << /Predictor 15 /Colors '.$channels.' /BitsPerComponent '.$bpc.' /Columns '.$w.' >>';//Scan chunks looking for palette, transparency and image data$pal = '';$trns = '';$data = '';$icc = false;do {$n = TCPDF_STATIC::_freadint($f);$type = fread($f, 4);if ($type == 'PLTE') {// read palette$pal = TCPDF_STATIC::rfread($f, $n);fread($f, 4);} elseif ($type == 'tRNS') {// read transparency info$t = TCPDF_STATIC::rfread($f, $n);if ($ct == 0) {$trns = array(ord($t{1}));} elseif ($ct == 2) {$trns = array(ord($t{1}), ord($t{3}), ord($t{5}));} else {$pos = strpos($t, chr(0));if ($pos !== false) {$trns = array($pos);}}fread($f, 4);} elseif ($type == 'IDAT') {// read image data block$data .= TCPDF_STATIC::rfread($f, $n);fread($f, 4);} elseif ($type == 'iCCP') {// skip profile name$len = 0;while ((ord(fread($f, 1)) > 0) AND ($len < 80)) {++$len;}// skip null separatorfread($f, 1);// get compression methodif (ord(fread($f, 1)) != 0) {// Unknown filter methodfclose($f);return false;}// read ICC Color Profile$icc = TCPDF_STATIC::rfread($f, ($n - $len - 2));// decompress profile$icc = gzuncompress($icc);fread($f, 4);} elseif ($type == 'IEND') {break;} else {TCPDF_STATIC::rfread($f, $n + 4);}} while ($n);if (($colspace == 'Indexed') AND (empty($pal))) {// Missing palettefclose($f);return false;}fclose($f);return array('w' => $w, 'h' => $h, 'ch' => $channels, 'icc' => $icc, 'cs' => $colspace, 'bpc' => $bpc, 'f' => 'FlateDecode', 'parms' => $parms, 'pal' => $pal, 'trns' => $trns, 'data' => $data);}} // END OF TCPDF_STATIC CLASS//============================================================+// END OF FILE//============================================================+