]>
git.immae.eu Git - github/wallabag/wallabag.git/blob - inc/3rdparty/libraries/tcpdf/include/tcpdf_images.php
2 //============================================================+
3 // File name : tcpdf_images.php
6 // Last Update : 2014-04-03
7 // Author : Nicola Asuni - Tecnick.com LTD - www.tecnick.com - info@tecnick.com
8 // License : GNU-LGPL v3 (http://www.gnu.org/copyleft/lesser.html)
9 // -------------------------------------------------------------------
10 // Copyright (C) 2002-2014 Nicola Asuni - Tecnick.com LTD
12 // This file is part of TCPDF software library.
14 // TCPDF is free software: you can redistribute it and/or modify it
15 // under the terms of the GNU Lesser General Public License as
16 // published by the Free Software Foundation, either version 3 of the
17 // License, or (at your option) any later version.
19 // TCPDF is distributed in the hope that it will be useful, but
20 // WITHOUT ANY WARRANTY; without even the implied warranty of
21 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
22 // See the GNU Lesser General Public License for more details.
24 // You should have received a copy of the License
25 // along with TCPDF. If not, see
26 // <http://www.tecnick.com/pagefiles/tcpdf/LICENSE.TXT>.
28 // See LICENSE.TXT file for more information.
29 // -------------------------------------------------------------------
32 // Static image methods used by the TCPDF class.
34 //============================================================+
38 * This is a PHP class that contains static image methods for the TCPDF class.<br>
39 * @package com.tecnick.tcpdf
40 * @author Nicola Asuni
46 * Static image methods used by the TCPDF class.
47 * @package com.tecnick.tcpdf
48 * @brief PHP class for generating PDF documents without requiring external extensions.
50 * @author Nicola Asuni - info@tecnick.com
55 * Array of hinheritable SVG properties.
56 * @since 5.0.000 (2010-05-02)
59 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');
61 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
64 * Return the image type given the file name or array returned by getimagesize() function.
65 * @param $imgfile (string) image file name
66 * @param $iminfo (array) array of image information returned by getimagesize() function.
67 * @return string image type
68 * @since 4.8.017 (2009-11-27)
71 public static function getImageFileType($imgfile, $iminfo=array()) {
73 if (isset($iminfo['mime']) AND !empty($iminfo['mime'])) {
74 $mime = explode('/', $iminfo['mime']);
75 if ((count($mime) > 1) AND ($mime[0] == 'image') AND (!empty($mime[1]))) {
76 $type = strtolower(trim($mime[1]));
80 $fileinfo = pathinfo($imgfile);
81 if (isset($fileinfo['extension']) AND (!TCPDF_STATIC
::empty_string($fileinfo['extension']))) {
82 $type = strtolower(trim($fileinfo['extension']));
92 * Set the transparency for the given GD image.
93 * @param $new_image (image) GD image object
94 * @param $image (image) GD image object.
95 * return GD image object.
96 * @since 4.9.016 (2010-04-20)
99 public static function setGDImageTransparency($new_image, $image) {
100 // transparency index
101 $tid = imagecolortransparent($image);
102 // default transparency color
103 $tcol = array('red' => 255, 'green' => 255, 'blue' => 255);
105 // get the colors for the transparency index
106 $tcol = imagecolorsforindex($image, $tid);
108 $tid = imagecolorallocate($new_image, $tcol['red'], $tcol['green'], $tcol['blue']);
109 imagefill($new_image, 0, 0, $tid);
110 imagecolortransparent($new_image, $tid);
115 * Convert the loaded image to a PNG and then return a structure for the PDF creator.
116 * This function requires GD library and write access to the directory defined on K_PATH_CACHE constant.
117 * @param $image (image) Image object.
118 * return image PNG image object.
119 * @since 4.9.016 (2010-04-20)
122 public static function _toPNG($image) {
123 // set temporary image file name
124 $tempname = TCPDF_STATIC
::getObjFilename('img');
125 // turn off interlaced mode
126 imageinterlace($image, 0);
127 // create temporary PNG image
128 imagepng($image, $tempname);
129 // remove image from memory
130 imagedestroy($image);
131 // get PNG image data
132 $retvars = self
::_parsepng($tempname);
133 // tidy up by removing temporary image
139 * Convert the loaded image to a JPEG and then return a structure for the PDF creator.
140 * This function requires GD library and write access to the directory defined on K_PATH_CACHE constant.
141 * @param $image (image) Image object.
142 * @param $quality (int) JPEG quality.
143 * return image JPEG image object.
146 public static function _toJPEG($image, $quality) {
147 $tempname = TCPDF_STATIC
::getObjFilename('img');
148 imagejpeg($image, $tempname, $quality);
149 imagedestroy($image);
150 $retvars = self
::_parsejpeg($tempname);
151 // tidy up by removing temporary image
157 * Extract info from a JPEG file without using the GD library.
158 * @param $file (string) image file to parse
159 * @return array structure containing the image data
162 public static function _parsejpeg($file) {
163 $a = getimagesize($file);
165 //Missing or incorrect image file
173 $bpc = isset($a['bits']) ? intval($a['bits']) : 8;
174 // number of image channels
175 if (!isset($a['channels'])) {
178 $channels = intval($a['channels']);
180 // default colour space
183 $colspace = 'DeviceGray';
187 $colspace = 'DeviceRGB';
191 $colspace = 'DeviceCMYK';
196 $colspace = 'DeviceRGB';
201 $data = file_get_contents($file);
202 // check for embedded ICC profile
205 while (($pos = strpos($data, "ICC_PROFILE\0", $offset)) !== false) {
206 // get ICC sequence length
207 $length = (TCPDF_STATIC
::_getUSHORT($data, ($pos - 2)) - 16);
208 // marker sequence number
209 $msn = max(1, ord($data[($pos +
12)]));
210 // number of markers (total of APP2 used)
211 $nom = max(1, ord($data[($pos +
13)]));
212 // get sequence segment
213 $icc[($msn - 1)] = substr($data, ($pos +
14), $length);
214 // move forward to next sequence
215 $offset = ($pos +
14 +
$length);
217 // order and compact ICC segments
218 if (count($icc) > 0) {
220 $icc = implode('', $icc);
221 if ((ord($icc[36]) != 0x61) OR (ord($icc[37]) != 0x63) OR (ord($icc[38]) != 0x73) OR (ord($icc[39]) != 0x70)) {
222 // invalid ICC profile
228 return array('w' => $a[0], 'h' => $a[1], 'ch' => $channels, 'icc' => $icc, 'cs' => $colspace, 'bpc' => $bpc, 'f' => 'DCTDecode', 'data' => $data);
232 * Extract info from a PNG file without using the GD library.
233 * @param $file (string) image file to parse
234 * @return array structure containing the image data
237 public static function _parsepng($file) {
238 $f = @fopen($file, 'rb');
240 // Can't open image file
244 if (fread($f, 8) != chr(137).'PNG'.chr(13).chr(10).chr(26).chr(10)) {
250 if (fread($f, 4) != 'IHDR') {
254 $w = TCPDF_STATIC
::_freadint($f);
255 $h = TCPDF_STATIC
::_freadint($f);
256 $bpc = ord(fread($f, 1));
257 $ct = ord(fread($f, 1));
259 $colspace = 'DeviceGray';
260 } elseif ($ct == 2) {
261 $colspace = 'DeviceRGB';
262 } elseif ($ct == 3) {
263 $colspace = 'Indexed';
269 if (ord(fread($f, 1)) != 0) {
270 // Unknown compression method
274 if (ord(fread($f, 1)) != 0) {
275 // Unknown filter method
279 if (ord(fread($f, 1)) != 0) {
280 // Interlacing not supported
285 $channels = ($ct == 2 ? 3 : 1);
286 $parms = '/DecodeParms << /Predictor 15 /Colors '.$channels.' /BitsPerComponent '.$bpc.' /Columns '.$w.' >>';
287 //Scan chunks looking for palette, transparency and image data
293 $n = TCPDF_STATIC
::_freadint($f);
294 $type = fread($f, 4);
295 if ($type == 'PLTE') {
297 $pal = TCPDF_STATIC
::rfread($f, $n);
299 } elseif ($type == 'tRNS') {
300 // read transparency info
301 $t = TCPDF_STATIC
::rfread($f, $n);
302 if ($ct == 0) { // DeviceGray
303 $trns = array(ord($t[1]));
304 } elseif ($ct == 2) { // DeviceRGB
305 $trns = array(ord($t[1]), ord($t[3]), ord($t[5]));
309 for ($i = 0; $i < $n; ++
$i) {
310 $trns[] = ord($t{$i
});
315 } elseif ($type == 'IDAT') {
316 // read image data block
317 $data .= TCPDF_STATIC
::rfread($f, $n);
319 } elseif ($type == 'iCCP') {
322 while ((ord(fread($f, 1)) != 0) AND ($len < 80)) {
325 // get compression method
326 if (ord(fread($f, 1)) != 0) {
327 // Unknown filter method
331 // read ICC Color Profile
332 $icc = TCPDF_STATIC
::rfread($f, ($n - $len - 2));
333 // decompress profile
334 $icc = gzuncompress($icc);
336 } elseif ($type == 'IEND') {
339 TCPDF_STATIC
::rfread($f, $n +
4);
342 if (($colspace == 'Indexed') AND (empty($pal))) {
348 return array('w' => $w, 'h' => $h, 'ch' => $channels, 'icc' => $icc, 'cs' => $colspace, 'bpc' => $bpc, 'f' => 'FlateDecode', 'parms' => $parms, 'pal' => $pal, 'trns' => $trns, 'data' => $data);
351 } // END OF TCPDF_IMAGES CLASS
353 //============================================================+
355 //============================================================+