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.
360 lines
11 KiB
360 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
|
|
*/
|
|
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 $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) {
|
|
// 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 $image (image) Image object.
|
|
* @param $tempfile (string) Temporary file name.
|
|
* return image PNG image object.
|
|
* @since 4.9.016 (2010-04-20)
|
|
* @public static
|
|
*/
|
|
public static function _toPNG($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 $image (image) Image object.
|
|
* @param $quality (int) JPEG quality.
|
|
* @param $tempfile (string) Temporary file name.
|
|
* return image JPEG image object.
|
|
* @public static
|
|
*/
|
|
public static function _toJPEG($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 $file (string) image file to parse
|
|
* @return array structure containing the image data
|
|
* @public static
|
|
*/
|
|
public static function _parsejpeg($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 $file (string) image file to parse
|
|
* @return array structure containing the image data
|
|
* @public static
|
|
*/
|
|
public static function _parsepng($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;
|
|
$n = TCPDF_STATIC::_freadint($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
|
|
//============================================================+
|