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<?php |
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//============================================================+ |
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// File name : tcpdf_images.php |
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// Version : 1.0.005 |
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// Begin : 2002-08-03 |
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// Last Update : 2014-11-15 |
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// Author : Nicola Asuni - Tecnick.com LTD - www.tecnick.com - info@tecnick.com |
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// License : GNU-LGPL v3 (http://www.gnu.org/copyleft/lesser.html) |
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// ------------------------------------------------------------------- |
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// Copyright (C) 2002-2014 Nicola Asuni - Tecnick.com LTD |
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// |
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// This file is part of TCPDF software library. |
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// |
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// TCPDF is free software: you can redistribute it and/or modify it |
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// under the terms of the GNU Lesser General Public License as |
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// published by the Free Software Foundation, either version 3 of the |
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// License, or (at your option) any later version. |
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// |
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// TCPDF is distributed in the hope that it will be useful, but |
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// WITHOUT ANY WARRANTY; without even the implied warranty of |
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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// See the GNU Lesser General Public License for more details. |
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// |
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// You should have received a copy of the License |
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// along with TCPDF. If not, see |
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// <http://www.tecnick.com/pagefiles/tcpdf/LICENSE.TXT>. |
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// |
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// See LICENSE.TXT file for more information. |
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// ------------------------------------------------------------------- |
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// |
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// Description : |
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// Static image methods used by the TCPDF class. |
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// |
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//============================================================+ |
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|
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/** |
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* @file |
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* This is a PHP class that contains static image methods for the TCPDF class.<br> |
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* @package com.tecnick.tcpdf |
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* @author Nicola Asuni |
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* @version 1.0.005 |
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*/ |
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|
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/** |
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* @class TCPDF_IMAGES |
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* Static image methods used by the TCPDF class. |
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* @package com.tecnick.tcpdf |
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* @brief PHP class for generating PDF documents without requiring external extensions. |
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* @version 1.0.005 |
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* @author Nicola Asuni - info@tecnick.com |
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*/ |
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class TCPDF_IMAGES { |
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|
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/** |
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* Array of hinheritable SVG properties. |
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* @since 5.0.000 (2010-05-02) |
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* @public static |
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*/ |
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public static $svginheritprop = array('clip-rule', 'color', 'color-interpolation', 'color-interpolation-filters', 'color-profile', 'color-rendering', 'cursor', 'direction', 'display', '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'); |
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|
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
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|
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/** |
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* Return the image type given the file name or array returned by getimagesize() function. |
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* @param $imgfile (string) image file name |
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* @param $iminfo (array) array of image information returned by getimagesize() function. |
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* @return string image type |
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* @since 4.8.017 (2009-11-27) |
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* @public static |
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*/ |
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public static function getImageFileType($imgfile, $iminfo=array()) { |
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$type = ''; |
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if (isset($iminfo['mime']) AND !empty($iminfo['mime'])) { |
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$mime = explode('/', $iminfo['mime']); |
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if ((count($mime) > 1) AND ($mime[0] == 'image') AND (!empty($mime[1]))) { |
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$type = strtolower(trim($mime[1])); |
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} |
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} |
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if (empty($type)) { |
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$fileinfo = pathinfo($imgfile); |
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if (isset($fileinfo['extension']) AND (!TCPDF_STATIC::empty_string($fileinfo['extension']))) { |
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$type = strtolower(trim($fileinfo['extension'])); |
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} |
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} |
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if ($type == 'jpg') { |
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$type = 'jpeg'; |
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} |
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return $type; |
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} |
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|
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/** |
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* Set the transparency for the given GD image. |
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* @param $new_image (image) GD image object |
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* @param $image (image) GD image object. |
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* return GD image object. |
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* @since 4.9.016 (2010-04-20) |
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* @public static |
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*/ |
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public static function setGDImageTransparency($new_image, $image) { |
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// default transparency color (white) |
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$tcol = array('red' => 255, 'green' => 255, 'blue' => 255); |
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// transparency index |
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$tid = imagecolortransparent($image); |
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$palletsize = imagecolorstotal($image); |
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if (($tid >= 0) AND ($tid < $palletsize)) { |
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// get the colors for the transparency index |
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$tcol = imagecolorsforindex($image, $tid); |
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} |
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$tid = imagecolorallocate($new_image, $tcol['red'], $tcol['green'], $tcol['blue']); |
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imagefill($new_image, 0, 0, $tid); |
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imagecolortransparent($new_image, $tid); |
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return $new_image; |
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} |
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|
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/** |
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* Convert the loaded image to a PNG and then return a structure for the PDF creator. |
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* This function requires GD library and write access to the directory defined on K_PATH_CACHE constant. |
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* @param $image (image) Image object. |
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* @param $tempfile (string) Temporary file name. |
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* return image PNG image object. |
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* @since 4.9.016 (2010-04-20) |
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* @public static |
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*/ |
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public static function _toPNG($image, $tempfile) { |
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// turn off interlaced mode |
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imageinterlace($image, 0); |
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// create temporary PNG image |
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imagepng($image, $tempfile); |
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// remove image from memory |
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unset( $image ); |
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// get PNG image data |
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$retvars = self::_parsepng($tempfile); |
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// tidy up by removing temporary image |
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unlink($tempfile); |
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return $retvars; |
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} |
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|
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/** |
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* Convert the loaded image to a JPEG and then return a structure for the PDF creator. |
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* This function requires GD library and write access to the directory defined on K_PATH_CACHE constant. |
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* @param $image (image) Image object. |
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* @param $quality (int) JPEG quality. |
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* @param $tempfile (string) Temporary file name. |
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* return image JPEG image object. |
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* @public static |
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*/ |
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public static function _toJPEG($image, $quality, $tempfile) { |
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imagejpeg($image, $tempfile, $quality); |
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unset( $image ); |
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$retvars = self::_parsejpeg($tempfile); |
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// tidy up by removing temporary image |
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unlink($tempfile); |
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return $retvars; |
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} |
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|
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/** |
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* Extract info from a JPEG file without using the GD library. |
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* @param $file (string) image file to parse |
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* @return array structure containing the image data |
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* @public static |
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*/ |
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public static function _parsejpeg($file) { |
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// check if is a local file |
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if (!@TCPDF_STATIC::file_exists($file)) { |
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return false; |
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} |
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$a = getimagesize($file); |
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if (empty($a)) { |
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//Missing or incorrect image file |
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return false; |
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} |
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if ($a[2] != 2) { |
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// Not a JPEG file |
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return false; |
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} |
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// bits per pixel |
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$bpc = isset($a['bits']) ? intval($a['bits']) : 8; |
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// number of image channels |
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if (!isset($a['channels'])) { |
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$channels = 3; |
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} else { |
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$channels = intval($a['channels']); |
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} |
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// default colour space |
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switch ($channels) { |
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case 1: { |
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$colspace = 'DeviceGray'; |
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break; |
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} |
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case 3: { |
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$colspace = 'DeviceRGB'; |
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break; |
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} |
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case 4: { |
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$colspace = 'DeviceCMYK'; |
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break; |
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} |
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default: { |
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$channels = 3; |
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$colspace = 'DeviceRGB'; |
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break; |
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} |
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} |
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// get file content |
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$data = file_get_contents($file); |
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// check for embedded ICC profile |
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$icc = array(); |
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$offset = 0; |
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while (($pos = strpos($data, "ICC_PROFILE\0", $offset)) !== false) { |
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// get ICC sequence length |
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$length = (TCPDF_STATIC::_getUSHORT($data, ($pos - 2)) - 16); |
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// marker sequence number |
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$msn = max(1, ord($data[($pos + 12)])); |
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// number of markers (total of APP2 used) |
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$nom = max(1, ord($data[($pos + 13)])); |
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// get sequence segment |
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$icc[($msn - 1)] = substr($data, ($pos + 14), $length); |
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// move forward to next sequence |
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$offset = ($pos + 14 + $length); |
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} |
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// order and compact ICC segments |
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if (count($icc) > 0) { |
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ksort($icc); |
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$icc = implode('', $icc); |
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if ((ord($icc[36]) != 0x61) OR (ord($icc[37]) != 0x63) OR (ord($icc[38]) != 0x73) OR (ord($icc[39]) != 0x70)) { |
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// invalid ICC profile |
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$icc = false; |
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} |
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} else { |
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$icc = false; |
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} |
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return array('w' => $a[0], 'h' => $a[1], 'ch' => $channels, 'icc' => $icc, 'cs' => $colspace, 'bpc' => $bpc, 'f' => 'DCTDecode', 'data' => $data); |
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} |
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|
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/** |
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* Extract info from a PNG file without using the GD library. |
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* @param $file (string) image file to parse |
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* @return array structure containing the image data |
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* @public static |
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*/ |
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public static function _parsepng($file) { |
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$f = @fopen($file, 'rb'); |
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if ($f === false) { |
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// Can't open image file |
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return false; |
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} |
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//Check signature |
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if (fread($f, 8) != chr(137).'PNG'.chr(13).chr(10).chr(26).chr(10)) { |
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// Not a PNG file |
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return false; |
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} |
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//Read header chunk |
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fread($f, 4); |
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if (fread($f, 4) != 'IHDR') { |
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//Incorrect PNG file |
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return false; |
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} |
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$w = TCPDF_STATIC::_freadint($f); |
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$h = TCPDF_STATIC::_freadint($f); |
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$bpc = ord(fread($f, 1)); |
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$ct = ord(fread($f, 1)); |
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if ($ct == 0) { |
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$colspace = 'DeviceGray'; |
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} elseif ($ct == 2) { |
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$colspace = 'DeviceRGB'; |
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} elseif ($ct == 3) { |
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$colspace = 'Indexed'; |
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} else { |
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// alpha channel |
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fclose($f); |
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return 'pngalpha'; |
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} |
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if (ord(fread($f, 1)) != 0) { |
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// Unknown compression method |
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fclose($f); |
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return false; |
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} |
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if (ord(fread($f, 1)) != 0) { |
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// Unknown filter method |
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fclose($f); |
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return false; |
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} |
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if (ord(fread($f, 1)) != 0) { |
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// Interlacing not supported |
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fclose($f); |
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return false; |
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} |
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fread($f, 4); |
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$channels = ($ct == 2 ? 3 : 1); |
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$parms = '/DecodeParms << /Predictor 15 /Colors '.$channels.' /BitsPerComponent '.$bpc.' /Columns '.$w.' >>'; |
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//Scan chunks looking for palette, transparency and image data |
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$pal = ''; |
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$trns = ''; |
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$data = ''; |
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$icc = false; |
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$n = TCPDF_STATIC::_freadint($f); |
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do { |
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$type = fread($f, 4); |
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if ($type == 'PLTE') { |
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// read palette |
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$pal = TCPDF_STATIC::rfread($f, $n); |
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fread($f, 4); |
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} elseif ($type == 'tRNS') { |
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// read transparency info |
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$t = TCPDF_STATIC::rfread($f, $n); |
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if ($ct == 0) { // DeviceGray |
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$trns = array(ord($t[1])); |
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} elseif ($ct == 2) { // DeviceRGB |
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$trns = array(ord($t[1]), ord($t[3]), ord($t[5])); |
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} else { // Indexed |
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if ($n > 0) { |
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$trns = array(); |
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for ($i = 0; $i < $n; ++ $i) { |
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$trns[] = ord($t[$i]); |
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} |
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} |
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} |
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fread($f, 4); |
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} elseif ($type == 'IDAT') { |
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// read image data block |
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$data .= TCPDF_STATIC::rfread($f, $n); |
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fread($f, 4); |
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} elseif ($type == 'iCCP') { |
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// skip profile name |
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$len = 0; |
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while ((ord(fread($f, 1)) != 0) AND ($len < 80)) { |
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++$len; |
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} |
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// get compression method |
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if (ord(fread($f, 1)) != 0) { |
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// Unknown filter method |
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fclose($f); |
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return false; |
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} |
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// read ICC Color Profile |
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$icc = TCPDF_STATIC::rfread($f, ($n - $len - 2)); |
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// decompress profile |
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$icc = gzuncompress($icc); |
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fread($f, 4); |
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} elseif ($type == 'IEND') { |
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break; |
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} else { |
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TCPDF_STATIC::rfread($f, $n + 4); |
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} |
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$n = TCPDF_STATIC::_freadint($f); |
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} while ($n); |
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if (($colspace == 'Indexed') AND (empty($pal))) { |
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// Missing palette |
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fclose($f); |
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return false; |
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} |
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fclose($f); |
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return array('w' => $w, 'h' => $h, 'ch' => $channels, 'icc' => $icc, 'cs' => $colspace, 'bpc' => $bpc, 'f' => 'FlateDecode', 'parms' => $parms, 'pal' => $pal, 'trns' => $trns, 'data' => $data); |
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} |
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|
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} // END OF TCPDF_IMAGES CLASS |
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|
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//============================================================+ |
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// END OF FILE |
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//============================================================+ |
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|
