You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
359 lines
11 KiB
359 lines
11 KiB
<?php |
|
//============================================================+ |
|
// File name : tcpdf_images.php |
|
// Version : 1.0.005 |
|
// Begin : 2002-08-03 |
|
// Last Update : 2014-11-15 |
|
// 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 1.0.005 |
|
*/ |
|
|
|
/** |
|
* @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 1.0.005 |
|
* @author Nicola Asuni - info@tecnick.com |
|
*/ |
|
class TCPDF_IMAGES { |
|
|
|
/** |
|
* Array of hinheritable SVG properties. |
|
* @since 5.0.000 (2010-05-02) |
|
* @public static |
|
* |
|
* @var string[] |
|
*/ |
|
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'); |
|
|
|
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
|
|
|
/** |
|
* Return the image type given the file name or array returned by getimagesize() function. |
|
* @param string $imgfile image file name |
|
* @param array $iminfo array of image information returned by getimagesize() function. |
|
* @return string image type |
|
* @since 4.8.017 (2009-11-27) |
|
* @public static |
|
*/ |
|
public static function getImageFileType($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)) { |
|
$type = strtolower(trim(pathinfo(parse_url($imgfile, PHP_URL_PATH), PATHINFO_EXTENSION))); |
|
} |
|
if ($type == 'jpg') { |
|
$type = 'jpeg'; |
|
} |
|
return $type; |
|
} |
|
|
|
/** |
|
* Set the transparency for the given GD image. |
|
* @param resource $new_image GD image object |
|
* @param resource $image GD image object. |
|
* @return resource GD image object $new_image |
|
* @since 4.9.016 (2010-04-20) |
|
* @public static |
|
*/ |
|
public static function setGDImageTransparency($new_image, $image) { |
|
// default transparency color (white) |
|
$tcol = array('red' => 255, 'green' => 255, 'blue' => 255); |
|
// transparency index |
|
$tid = imagecolortransparent($image); |
|
$palletsize = imagecolorstotal($image); |
|
if (($tid >= 0) AND ($tid < $palletsize)) { |
|
// 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 resource $image Image object. |
|
* @param string $tempfile Temporary file name. |
|
* return image PNG image object. |
|
* @since 4.9.016 (2010-04-20) |
|
* @public static |
|
*/ |
|
public static function _toPNG($image, $tempfile) { |
|
// turn off interlaced mode |
|
imageinterlace($image, 0); |
|
// create temporary PNG image |
|
imagepng($image, $tempfile); |
|
// remove image from memory |
|
imagedestroy($image); |
|
// get PNG image data |
|
$retvars = self::_parsepng($tempfile); |
|
// tidy up by removing temporary image |
|
unlink($tempfile); |
|
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 resource $image Image object. |
|
* @param int $quality JPEG quality. |
|
* @param string $tempfile Temporary file name. |
|
* return array|false image JPEG image object. |
|
* @public static |
|
*/ |
|
public static function _toJPEG($image, $quality, $tempfile) { |
|
imagejpeg($image, $tempfile, $quality); |
|
imagedestroy($image); |
|
$retvars = self::_parsejpeg($tempfile); |
|
// tidy up by removing temporary image |
|
unlink($tempfile); |
|
return $retvars; |
|
} |
|
|
|
/** |
|
* Extract info from a JPEG file without using the GD library. |
|
* @param string $file image file to parse |
|
* @return array|false structure containing the image data |
|
* @public static |
|
*/ |
|
public static function _parsejpeg($file) { |
|
// check if is a local file |
|
if (!@TCPDF_STATIC::file_exists($file)) { |
|
return false; |
|
} |
|
$a = getimagesize($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 string $file image file to parse |
|
* @return array|false structure containing the image data |
|
* @public static |
|
*/ |
|
public static function _parsepng($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; |
|
$n = TCPDF_STATIC::_freadint($f); |
|
do { |
|
$type = fread($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); |
|
} |
|
$n = TCPDF_STATIC::_freadint($f); |
|
} 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 |
|
//============================================================+
|
|
|