--- /dev/null
+<?php
+//============================================================+
+// File name : tcpdf_images.php
+// Version : 1.0.003
+// Begin : 2002-08-03
+// Last Update : 2014-04-03
+// 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) 2002-2014 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 1.0.003
+ */
+
+/**
+ * @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 1.0.003
+ * @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
+ $tempname = TCPDF_STATIC::getObjFilename('img');
+ // turn off interlaced mode
+ imageinterlace($image, 0);
+ // create temporary PNG image
+ imagepng($image, $tempname);
+ // remove image from memory
+ imagedestroy($image);
+ // get PNG image data
+ $retvars = self::_parsepng($tempname);
+ // tidy up by removing temporary image
+ unlink($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) {
+ $tempname = TCPDF_STATIC::getObjFilename('img');
+ imagejpeg($image, $tempname, $quality);
+ imagedestroy($image);
+ $retvars = self::_parsejpeg($tempname);
+ // tidy up by removing temporary image
+ unlink($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($a)) {
+ //Missing or incorrect image file
+ return false;
+ }
+ if ($a[2] != 2) {
+ // Not a JPEG file
+ return false;
+ }
+ // bits per pixel
+ $bpc = isset($a['bits']) ? intval($a['bits']) : 8;
+ // number of image channels
+ if (!isset($a['channels'])) {
+ $channels = 3;
+ } else {
+ $channels = intval($a['channels']);
+ }
+ // default colour space
+ switch ($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 + $length);
+ }
+ // order and compact ICC segments
+ if (count($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 ($f === false) {
+ // Can't open image file
+ return false;
+ }
+ //Check signature
+ if (fread($f, 8) != chr(137).'PNG'.chr(13).chr(10).chr(26).chr(10)) {
+ // Not a PNG file
+ return false;
+ }
+ //Read header chunk
+ fread($f, 4);
+ if (fread($f, 4) != 'IHDR') {
+ //Incorrect PNG file
+ return false;
+ }
+ $w = TCPDF_STATIC::_freadint($f);
+ $h = TCPDF_STATIC::_freadint($f);
+ $bpc = ord(fread($f, 1));
+ $ct = ord(fread($f, 1));
+ if ($ct == 0) {
+ $colspace = 'DeviceGray';
+ } elseif ($ct == 2) {
+ $colspace = 'DeviceRGB';
+ } elseif ($ct == 3) {
+ $colspace = 'Indexed';
+ } else {
+ // alpha channel
+ fclose($f);
+ return 'pngalpha';
+ }
+ if (ord(fread($f, 1)) != 0) {
+ // Unknown compression method
+ fclose($f);
+ return false;
+ }
+ if (ord(fread($f, 1)) != 0) {
+ // Unknown filter method
+ fclose($f);
+ return false;
+ }
+ if (ord(fread($f, 1)) != 0) {
+ // Interlacing not supported
+ fclose($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) { // DeviceGray
+ $trns = array(ord($t[1]));
+ } elseif ($ct == 2) { // DeviceRGB
+ $trns = array(ord($t[1]), ord($t[3]), ord($t[5]));
+ } else { // Indexed
+ if ($n > 0) {
+ $trns = array();
+ for ($i = 0; $i < $n; ++ $i) {
+ $trns[] = ord($t{$i});
+ }
+ }
+ }
+ fread($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;
+ }
+ // get compression method
+ if (ord(fread($f, 1)) != 0) {
+ // Unknown filter method
+ fclose($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 palette
+ fclose($f);
+ return false;
+ }
+ fclose($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_IMAGES CLASS
+
+//============================================================+
+// END OF FILE
+//============================================================+
projects / github / wallabag / wallabag.git / blobdiff