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<?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 |
$tempname = TCPDF_STATIC::getObjFilename('png'); |
// turn off interlaced mode |
imageinterlace($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) { |
$tempname = TCPDF_STATIC::getObjFilename('jpg'); |
imagejpeg($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)); |
if ($bpc > 8) { |
// 16-bit depth not supported |
fclose($f); |
return false; |
} |
$ct = ord(fread($f, 1)); |
if ($ct == 0) { |
$colspace = 'DeviceGray'; |
} elseif ($ct == 2) { |
$colspace = 'DeviceRGB'; |
} elseif ($ct == 3) { |
$colspace = 'Indexed'; |
} else { |
// alpha channel |
fclose($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) { |
$trns = array(ord($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 separator |
fread($f, 1); |
// get compression method |
if (ord(fread($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_STATIC CLASS |
|
//============================================================+ |
// END OF FILE |
//============================================================+ |