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authorThomas Citharel <tcit@tcit.fr>2014-12-22 14:33:01 +0100
committerThomas Citharel <tcit@tcit.fr>2014-12-22 14:33:01 +0100
commitf3917b1ee4bba812e82da57dd181f50d62926db4 (patch)
treecb4b04931e97e4a69500bf9d7aa5c21985cab59e /inc/3rdparty/libraries/tcpdf/include/tcpdf_images.php
parent311baf86befde0557faea614ca4d13bb2bd2cc66 (diff)
parent9254b6cf460edec3a59e9ccc19873481a1d19c90 (diff)
downloadwallabag-f3917b1ee4bba812e82da57dd181f50d62926db4.tar.gz
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Merge branch 'dev' into randomarticle
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1<?php
2//============================================================+
3// File name : tcpdf_images.php
4// Version : 1.0.003
5// Begin : 2002-08-03
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
11//
12// This file is part of TCPDF software library.
13//
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.
18//
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.
23//
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>.
27//
28// See LICENSE.TXT file for more information.
29// -------------------------------------------------------------------
30//
31// Description :
32// Static image methods used by the TCPDF class.
33//
34//============================================================+
35
36/**
37 * @file
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
41 * @version 1.0.003
42 */
43
44/**
45 * @class TCPDF_IMAGES
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.
49 * @version 1.0.003
50 * @author Nicola Asuni - info@tecnick.com
51 */
52class TCPDF_IMAGES {
53
54 /**
55 * Array of hinheritable SVG properties.
56 * @since 5.0.000 (2010-05-02)
57 * @public static
58 */
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');
60
61// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
62
63 /**
64 * Return the image type given the file name or array returned by getimagesize() function.
65 * @param $imgfile (string) image file name
66 * @param $iminfo (array) array of image information returned by getimagesize() function.
67 * @return string image type
68 * @since 4.8.017 (2009-11-27)
69 * @public static
70 */
71 public static function getImageFileType($imgfile, $iminfo=array()) {
72 $type = '';
73 if (isset($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]));
77 }
78 }
79 if (empty($type)) {
80 $fileinfo = pathinfo($imgfile);
81 if (isset($fileinfo['extension']) AND (!TCPDF_STATIC::empty_string($fileinfo['extension']))) {
82 $type = strtolower(trim($fileinfo['extension']));
83 }
84 }
85 if ($type == 'jpg') {
86 $type = 'jpeg';
87 }
88 return $type;
89 }
90
91 /**
92 * Set the transparency for the given GD image.
93 * @param $new_image (image) GD image object
94 * @param $image (image) GD image object.
95 * return GD image object.
96 * @since 4.9.016 (2010-04-20)
97 * @public static
98 */
99 public static function setGDImageTransparency($new_image, $image) {
100 // transparency index
101 $tid = imagecolortransparent($image);
102 // default transparency color
103 $tcol = array('red' => 255, 'green' => 255, 'blue' => 255);
104 if ($tid >= 0) {
105 // get the colors for the transparency index
106 $tcol = imagecolorsforindex($image, $tid);
107 }
108 $tid = imagecolorallocate($new_image, $tcol['red'], $tcol['green'], $tcol['blue']);
109 imagefill($new_image, 0, 0, $tid);
110 imagecolortransparent($new_image, $tid);
111 return $new_image;
112 }
113
114 /**
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 $image (image) Image object.
118 * return image PNG image object.
119 * @since 4.9.016 (2010-04-20)
120 * @public static
121 */
122 public static function _toPNG($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
134 unlink($tempname);
135 return $retvars;
136 }
137
138 /**
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 $quality (int) JPEG quality.
143 * return image JPEG image object.
144 * @public static
145 */
146 public static function _toJPEG($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
152 unlink($tempname);
153 return $retvars;
154 }
155
156 /**
157 * Extract info from a JPEG file without using the GD library.
158 * @param $file (string) image file to parse
159 * @return array structure containing the image data
160 * @public static
161 */
162 public static function _parsejpeg($file) {
163 $a = getimagesize($file);
164 if (empty($a)) {
165 //Missing or incorrect image file
166 return false;
167 }
168 if ($a[2] != 2) {
169 // Not a JPEG file
170 return false;
171 }
172 // bits per pixel
173 $bpc = isset($a['bits']) ? intval($a['bits']) : 8;
174 // number of image channels
175 if (!isset($a['channels'])) {
176 $channels = 3;
177 } else {
178 $channels = intval($a['channels']);
179 }
180 // default colour space
181 switch ($channels) {
182 case 1: {
183 $colspace = 'DeviceGray';
184 break;
185 }
186 case 3: {
187 $colspace = 'DeviceRGB';
188 break;
189 }
190 case 4: {
191 $colspace = 'DeviceCMYK';
192 break;
193 }
194 default: {
195 $channels = 3;
196 $colspace = 'DeviceRGB';
197 break;
198 }
199 }
200 // get file content
201 $data = file_get_contents($file);
202 // check for embedded ICC profile
203 $icc = array();
204 $offset = 0;
205 while (($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 + $length);
216 }
217 // order and compact ICC segments
218 if (count($icc) > 0) {
219 ksort($icc);
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
223 $icc = false;
224 }
225 } else {
226 $icc = false;
227 }
228 return array('w' => $a[0], 'h' => $a[1], 'ch' => $channels, 'icc' => $icc, 'cs' => $colspace, 'bpc' => $bpc, 'f' => 'DCTDecode', 'data' => $data);
229 }
230
231 /**
232 * Extract info from a PNG file without using the GD library.
233 * @param $file (string) image file to parse
234 * @return array structure containing the image data
235 * @public static
236 */
237 public static function _parsepng($file) {
238 $f = @fopen($file, 'rb');
239 if ($f === false) {
240 // Can't open image file
241 return false;
242 }
243 //Check signature
244 if (fread($f, 8) != chr(137).'PNG'.chr(13).chr(10).chr(26).chr(10)) {
245 // Not a PNG file
246 return false;
247 }
248 //Read header chunk
249 fread($f, 4);
250 if (fread($f, 4) != 'IHDR') {
251 //Incorrect PNG file
252 return false;
253 }
254 $w = TCPDF_STATIC::_freadint($f);
255 $h = TCPDF_STATIC::_freadint($f);
256 $bpc = ord(fread($f, 1));
257 $ct = ord(fread($f, 1));
258 if ($ct == 0) {
259 $colspace = 'DeviceGray';
260 } elseif ($ct == 2) {
261 $colspace = 'DeviceRGB';
262 } elseif ($ct == 3) {
263 $colspace = 'Indexed';
264 } else {
265 // alpha channel
266 fclose($f);
267 return 'pngalpha';
268 }
269 if (ord(fread($f, 1)) != 0) {
270 // Unknown compression method
271 fclose($f);
272 return false;
273 }
274 if (ord(fread($f, 1)) != 0) {
275 // Unknown filter method
276 fclose($f);
277 return false;
278 }
279 if (ord(fread($f, 1)) != 0) {
280 // Interlacing not supported
281 fclose($f);
282 return false;
283 }
284 fread($f, 4);
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
288 $pal = '';
289 $trns = '';
290 $data = '';
291 $icc = false;
292 do {
293 $n = TCPDF_STATIC::_freadint($f);
294 $type = fread($f, 4);
295 if ($type == 'PLTE') {
296 // read palette
297 $pal = TCPDF_STATIC::rfread($f, $n);
298 fread($f, 4);
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]));
306 } else { // Indexed
307 if ($n > 0) {
308 $trns = array();
309 for ($i = 0; $i < $n; ++ $i) {
310 $trns[] = ord($t{$i});
311 }
312 }
313 }
314 fread($f, 4);
315 } elseif ($type == 'IDAT') {
316 // read image data block
317 $data .= TCPDF_STATIC::rfread($f, $n);
318 fread($f, 4);
319 } elseif ($type == 'iCCP') {
320 // skip profile name
321 $len = 0;
322 while ((ord(fread($f, 1)) != 0) AND ($len < 80)) {
323 ++$len;
324 }
325 // get compression method
326 if (ord(fread($f, 1)) != 0) {
327 // Unknown filter method
328 fclose($f);
329 return false;
330 }
331 // read ICC Color Profile
332 $icc = TCPDF_STATIC::rfread($f, ($n - $len - 2));
333 // decompress profile
334 $icc = gzuncompress($icc);
335 fread($f, 4);
336 } elseif ($type == 'IEND') {
337 break;
338 } else {
339 TCPDF_STATIC::rfread($f, $n + 4);
340 }
341 } while ($n);
342 if (($colspace == 'Indexed') AND (empty($pal))) {
343 // Missing palette
344 fclose($f);
345 return false;
346 }
347 fclose($f);
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);
349 }
350
351} // END OF TCPDF_IMAGES CLASS
352
353//============================================================+
354// END OF FILE
355//============================================================+