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Image_Toolbox.class.php
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Image_Toolbox.class.php
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<?php
/**
* Image_Toolbox.class.php -- PHP image manipulation class
*
* Copyright (C) 2003 Martin Theimer <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This program 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 General Public License <http://www.opensource.org/gpl-license.html>
* for more details..
*
* The latest version of Image_Toolbox can be obtained from:
* http://sourceforge.net/projects/image-toolbox
* http://www.phpclasses.org/image_toolbox
*
* @author Martin Theimer <[email protected]>
* @copyright Copyright (C) 2003 Martin Theimer
* @version 1.1.0
* @package Image_Toolbox
* @link http://sourceforge.net/projects/image-toolbox
*/
// $Id$
if (!defined('IMAGE_TOOLBOX_DEFAULT_JPEG_QUALITY')) {
define('IMAGE_TOOLBOX_DEFAULT_JPEG_QUALITY', 75);
}
if (!defined('IMAGE_TOOLBOX_DEFAULT_8BIT_COLORS')) {
define('IMAGE_TOOLBOX_DEFAULT_8BIT_COLORS', 256);
}
if (!defined('IMAGE_TOOLBOX_BIAS_HORIZONTAL')) {
define('IMAGE_TOOLBOX_BIAS_HORIZONTAL', 1);
}
if (!defined('IMAGE_TOOLBOX_BIAS_VERTICAL')) {
define('IMAGE_TOOLBOX_BIAS_VERTICAL', 0);
}
if (!defined('IMAGE_TOOLBOX_BLEND_COPY')) {
define('IMAGE_TOOLBOX_BLEND_COPY', 1);
}
if (!defined('IMAGE_TOOLBOX_BLEND_MULTIPLY')) {
define('IMAGE_TOOLBOX_BLEND_MULTIPLY', 2);
}
if (!defined('IMAGE_TOOLBOX_BLEND_SCREEN')) {
define('IMAGE_TOOLBOX_BLEND_SCREEN', 3);
}
if (!defined('IMAGE_TOOLBOX_BLEND_DIFFERENCE')) {
define('IMAGE_TOOLBOX_BLEND_DIFFERENCE', 4);
}
if (!defined('IMAGE_TOOLBOX_BLEND_NEGATION')) {
define('IMAGE_TOOLBOX_BLEND_NEGATION', 5);
}
if (!defined('IMAGE_TOOLBOX_BLEND_EXCLUTION')) {
define('IMAGE_TOOLBOX_BLEND_EXCLUSION', 6);
}
if (!defined('IMAGE_TOOLBOX_BLEND_OVERLAY')) {
define('IMAGE_TOOLBOX_BLEND_OVERLAY', 7);
}
/**
* PHP image manipulation class
*
* This class provides an easy to use library to the PHP GD-based imagefunctions
*
* @author Martin Theimer <[email protected]>
* @copyright 2003, Martin Theimer
* @package Image_Toolbox
* @link http://sourceforge.net/projects/image-toolbox
* @version 1.1.0
*/
class Image_Toolbox {
/**
* The prefix for every error message
*
* @access private
* @var string
*/
var $_error_prefix = 'Image: ';
/**
* Defines imagetypes and how they are supported by the server
*
* @access private
* @var array
*/
var $_types = array (
1 => array (
'ext' => 'gif',
'mime' => 'image/gif',
'supported' => 0
),
2 => array (
'ext' => 'jpg',
'mime' => 'image/jpeg',
'supported' => 0
),
3 => array (
'ext' => 'png',
'mime' => 'image/png',
'supported' => 0
)
);
/**
* Which PHP image resize function to be used
* imagecopyresampled only supported with GD >= 2.0
*
* @access private
* @var string
*/
var $_resize_function = 'imagecopyresampled';
/**
* Stores all image resource data
*
* @access private
* @var array
*/
var $_img = array (
'main' => array (
'resource' => 0,
'width' => 0,
'height' => 0,
'bias' => 0,
'aspectratio' => 0,
'type' => 0,
'output_type' => 0,
'indexedcolors' => 0,
'color' => -1
)
);
/**
* Which PHP image create function to be used
* imagecreatetruecolor only supported with GD >= 2.0
*
* @access private
* @var string
*/
var $_imagecreatefunction = '';
/**
* The class constructor.
*
* Determines the image features of the server and sets the according values.<br>
* Additionally you can specify a image to be created/loaded. like {@link addImage() addImage}.
*
* If no parameter is given, no image resource will be generated<br>
* Or:<br>
* <i>string</i> <b>$file</b> imagefile to load<br>
* Or:<br>
* <i>integer</i> <b>$width</b> imagewidth of new image to be created<br>
* <i>integer</i> <b>$height</b> imageheight of new image to be created<br>
* <i>string</i> <b>$fillcolor</b> optional fill the new image with this color (hexformat, e.g. '#FF0000')<br>
*/
function Image_Toolbox() {
$args = func_get_args();
$argc = func_num_args();
//get GD information. see what types we can handle
$gd_info = function_exists('gd_info') ? gd_info() : $this->_gd_info();
preg_match("/\A[\D]*([\d+\.]*)[\D]*\Z/", $gd_info['GD Version'], $matches);
list($this->_gd_version_string, $this->_gd_version_number) = $matches;
$this->_gd_version = substr($this->_gd_version_number, 0, strpos($this->_gd_version_number, '.'));
if ($this->_gd_version >= 2) {
$this->_imagecreatefunction = 'imagecreatetruecolor';
$this->_resize_function = 'imagecopyresampled';
} else {
$this->_imagecreatefunction = 'imagecreate';
$this->_resize_function = 'imagecopyresized';
}
$this->_gd_ttf = $gd_info['FreeType Support'];
$this->_gd_ps = $gd_info['T1Lib Support'];
if ($gd_info['GIF Read Support']) {
$this->_types[1]['supported'] = 1;
if ($gd_info['GIF Create Support']) {
$this->_types[1]['supported'] = 2;
}
}
if ($gd_info['JPG Support']) {
$this->_types[2]['supported'] = 2;
}
if ($gd_info['PNG Support']) {
$this->_types[3]['supported'] = 2;
}
//load or create main image
if ($argc == 0) {
return true;
} else {
if ($this->_addImage($argc, $args)) {
foreach ($this->_img['operator'] as $key => $value) {
$this->_img['main'][$key] = $value;
}
$this->_img['main']['output_type'] = $this->_img['main']['type'];
unset($this->_img['operator']);
return true;
} else {
trigger_error($this->_error_prefix . 'No appropriate constructor found.', E_USER_ERROR);
return null;
}
}
}
/**
* Returns an assocative array with information about the image features of this server
*
* Array values:
* <ul>
* <li>'gd_version' -> what GD version is installed on this server (e.g. 2.0)</li>
* <li>'gif' -> 0 = not supported, 1 = reading is supported, 2 = creating is supported</li>
* <li>'jpg' -> 0 = not supported, 1 = reading is supported, 2 = creating is supported</li>
* <li>'png' -> 0 = not supported, 1 = reading is supported, 2 = creating is supported</li>
* <li>'ttf' -> TTF text creation. true = supported, false = not supported
* </ul>
*
* @return array
*/
function getServerFeatures() {
$features = array();
$features['gd_version'] = $this->_gd_version_number;
$features['gif'] = $this->_types[1]['supported'];
$features['jpg'] = $this->_types[2]['supported'];
$features['png'] = $this->_types[3]['supported'];
$features['ttf'] = $this->_gd_ttf;
return $features;
}
/**
* Flush all image resources and init a new one
*
* Parameter:<br>
* <i>string</i> <b>$file</b> imagefile to load<br>
* Or:<br>
* <i>integer</i> <b>$width</b> imagewidth of new image to be created<br>
* <i>integer</i> <b>$height</b> imageheight of new image to be created<br>
* <i>string</i> <b>$fillcolor</b> optional fill the new image with this color (hexformat, e.g. '#FF0000')<br>
*/
function newImage() {
$args = func_get_args();
$argc = func_num_args();
if ($this->_addImage($argc, $args)) {
foreach ($this->_img['operator'] as $key => $value) {
$this->_img['main'][$key] = $value;
}
$this->_img['main']['output_type'] = $this->_img['main']['type'];
unset($this->_img['operator']);
return true;
} else {
trigger_error($this->_error_prefix . 'No appropriate constructor found.', E_USER_ERROR);
return null;
}
}
/**
* Reimplements the original PHP {@link gd_info()} function for older PHP versions
*
* @access private
* @return array associative array with info about the GD library of the server
*/
function _gd_info() {
$array = array(
"GD Version" => "",
"FreeType Support" => false,
"FreeType Linkage" => "",
"T1Lib Support" => false,
"GIF Read Support" => false,
"GIF Create Support" => false,
"JPG Support" => false,
"PNG Support" => false,
"WBMP Support" => false,
"XBM Support" => false
);
$gif_support = 0;
ob_start();
eval("phpinfo();");
$info = ob_get_contents();
ob_end_clean();
foreach(explode("\n", $info) as $line) {
if(strpos($line, "GD Version") !== false)
$array["GD Version"] = trim(str_replace("GD Version", "", strip_tags($line)));
if(strpos($line, "FreeType Support") !== false)
$array["FreeType Support"] = trim(str_replace("FreeType Support", "", strip_tags($line)));
if(strpos($line, "FreeType Linkage") !== false)
$array["FreeType Linkage"] = trim(str_replace("FreeType Linkage", "", strip_tags($line)));
if(strpos($line, "T1Lib Support") !== false)
$array["T1Lib Support"] = trim(str_replace("T1Lib Support", "", strip_tags($line)));
if(strpos($line, "GIF Read Support") !== false)
$array["GIF Read Support"] = trim(str_replace("GIF Read Support", "", strip_tags($line)));
if(strpos($line, "GIF Create Support") !== false)
$array["GIF Create Support"] = trim(str_replace("GIF Create Support", "", strip_tags($line)));
if(strpos($line, "GIF Support") !== false)
$gif_support = trim(str_replace("GIF Support", "", strip_tags($line)));
if(strpos($line, "JPG Support") !== false)
$array["JPG Support"] = trim(str_replace("JPG Support", "", strip_tags($line)));
if(strpos($line, "PNG Support") !== false)
$array["PNG Support"] = trim(str_replace("PNG Support", "", strip_tags($line)));
if(strpos($line, "WBMP Support") !== false)
$array["WBMP Support"] = trim(str_replace("WBMP Support", "", strip_tags($line)));
if(strpos($line, "XBM Support") !== false)
$array["XBM Support"] = trim(str_replace("XBM Support", "", strip_tags($line)));
}
if($gif_support === "enabled") {
$array["GIF Read Support"] = true;
$array["GIF Create Support"] = true;
}
if($array["FreeType Support"] === "enabled") {
$array["FreeType Support"] = true;
}
if($array["T1Lib Support"] === "enabled") {
$array["T1Lib Support"] = true;
}
if($array["GIF Read Support"] === "enabled") {
$array["GIF Read Support"] = true;
}
if($array["GIF Create Support"] === "enabled") {
$array["GIF Create Support"] = true;
}
if($array["JPG Support"] === "enabled") {
$array["JPG Support"] = true;
}
if($array["PNG Support"] === "enabled") {
$array["PNG Support"] = true;
}
if($array["WBMP Support"] === "enabled") {
$array["WBMP Support"] = true;
}
if($array["XBM Support"] === "enabled") {
$array["XBM Support"] = true;
}
return $array;
}
/**
* Convert a color defined in hexvalues to the PHP color format
*
* @access private
* @param string $hex color value in hexformat (e.g. '#FF0000')
* @return integer color value in PHP format
*/
function _hexToPHPColor($hex) {
$length = strlen($hex);
$dr = hexdec(substr($hex, $length - 6, 2));
$dg = hexdec(substr($hex, $length - 4, 2));
$db = hexdec(substr($hex, $length - 2, 2));
$color = ($dr << 16) + ($dg << 8) + $db;
return $color;
}
/**
* Convert a color defined in hexvalues to corresponding dezimal values
*
* @access private
* @param string $hex color value in hexformat (e.g. '#FF0000')
* @return array associative array with color values in dezimal format (fields: 'red', 'green', 'blue')
*/
function _hexToDecColor($hex) {
$length = strlen($hex);
$color['red'] = hexdec(substr($hex, $length - 6, 2));
$color['green'] = hexdec(substr($hex, $length - 4, 2));
$color['blue'] = hexdec(substr($hex, $length - 2, 2));
return $color;
}
/**
* Generate a new image resource based on the given parameters
*
* Parameter:
* <i>string</i> <b>$file</b> imagefile to load<br>
* Or:<br>
* <i>integer</i> <b>$width</b> imagewidth of new image to be created<br>
* <i>integer</i> <b>$height</b> imageheight of new image to be created<br>
* <i>string</i> <b>$fillcolor</b> optional fill the new image with this color (hexformat, e.g. '#FF0000')<br>
*
* @access private
*/
function _addImage($argc, $args) {
if (($argc == 2 || $argc == 3) && is_int($args[0]) && is_int($args[1]) && (is_string($args[2]) || !isset($args[2]))) {
//neues leeres bild mit width und height (fillcolor optional)
$this->_img['operator']['width'] = $args[0];
$this->_img['operator']['height'] = $args[1];
($this->_img['operator']['width'] >= $this->_img['operator']['height']) ? ($this->_img['operator']['bias'] = IMAGE_TOOLBOX_BIAS_HORIZONTAL) : ($this->_img['operator']['bias'] = IMAGE_TOOLBOX_BIAS_VERTICAL);
$this->_img['operator']['aspectratio'] = $this->_img['operator']['width'] / $this->_img['operator']['height'];
$this->_img['operator']['indexedcolors'] = 0;
$functionname = $this->_imagecreatefunction;
$this->_img['operator']['resource'] = $functionname($this->_img['operator']['width'], $this->_img['operator']['height']);
// set default type jpg.
$this->_img['operator']['type'] = 2;
if (isset($args[2]) && is_string($args[2])) {
//neues bild mit farbe fllen
$fillcolor = $this->_hexToPHPColor($args[2]);
imagefill($this->_img['operator']['resource'], 0, 0, $fillcolor);
$this->_img['operator']['color'] = $fillcolor;
} else {
$this->_img['operator']['color'] = 0;
}
} elseif ($argc == 1 && is_string($args[0])) {
//bild aus datei laden. width und height original grsse
$this->_img['operator'] = $this->_loadFile($args[0]);
$this->_img['operator']['indexedcolors'] = imagecolorstotal($this->_img['operator']['resource']);
$this->_img['operator']['color'] = -1;
} else {
return false;
}
return true;
}
/**
* Loads a image file
*
* @access private
* @param string $filename imagefile to load
* @return array associative array with the loaded filedata
*/
function _loadFile($filename) {
if (file_exists($filename)) {
$info = getimagesize($filename);
$filedata['width'] = $info[0];
$filedata['height'] = $info[1];
($filedata['width'] >= $filedata['height']) ? ($filedata['bias'] = IMAGE_TOOLBOX_BIAS_HORIZONTAL) : ($filedata['bias'] = IMAGE_TOOLBOX_BIAS_VERTICAL);
$filedata['aspectratio'] = $filedata['width'] / $filedata['height'];
$filedata['type'] = $info[2];
if ($this->_types[$filedata['type']]['supported'] < 1) {
trigger_error($this->_error_prefix . 'Imagetype ('.$this->_types[$filedata['type']]['ext'].') not supported for reading.', E_USER_ERROR);
return null;
}
switch ($filedata['type']) {
case 1:
$dummy = imagecreatefromgif($filename);
$functionname = $this->_imagecreatefunction;
$filedata['resource'] = $functionname($filedata['width'], $filedata['height']);
imagecopy($filedata['resource'], $dummy, 0, 0, 0, 0, $filedata['width'], $filedata['height']);
imagedestroy($dummy);
break;
case 2:
$filedata['resource'] = imagecreatefromjpeg($filename);
break;
case 3:
$dummy = imagecreatefrompng($filename);
if (imagecolorstotal($dummy) != 0) {
$functionname = $this->_imagecreatefunction;
$filedata['resource'] = $functionname($filedata['width'], $filedata['height']);
imagecopy($filedata['resource'], $dummy, 0, 0, 0, 0, $filedata['width'], $filedata['height']);
} else {
$filedata['resource'] = $dummy;
}
unset($dummy);
break;
default:
trigger_error($this->_error_prefix . 'Imagetype not supported.', E_USER_ERROR);
return null;
}
return $filedata;
} else {
trigger_error($this->_error_prefix . 'Imagefile (' . $filename . ') does not exist.', E_USER_ERROR);
return null;
}
}
/**
* Output a image to the browser
*
* $output_type can be one of the following:<br>
* <ul>
* <li>'gif' -> gif image (if supported) (8-bit indexed colors)</li>
* <li>'png' -> png image (if supported) (truecolor)</li>
* <li>'png8' -> png image (if supported) (8-bit indexed colors)</li>
* <li>'jpg' -> jpeg image (if supported) (truecolor)</li>
* </ul>
* (default: same as original)
*
* $dither:<br>
* If this is true than dither is used on the conversion from truecolor to 8-bit indexed imageformats (png8, gif)<br>
* (default = false)
*
* @param string|integer $output_type type of outputted image
* @param integer $output_quality jpeg quality of outputted image (default: IMAGE_TOOLBOX_DEFAULT_JPEG_QUALITY)
* @param bool $dither use dither
* @return bool true on success, otherwise false
*/
function output($output_type = false, $output_quality = false, $dither = false) {
if ($output_type === false) {
$output_type = $this->_img['main']['output_type'];
}
switch ($output_type) {
case 1:
case 'gif':
case 'GIF':
if ($this->_types[1]['supported'] < 2) {
trigger_error($this->_error_prefix . 'Imagetype ('.$this->_types[$output_type]['ext'].') not supported for creating/writing.', E_USER_ERROR);
return null;
}
header ('Content-type: ' . $this->_types[$output_type]['mime']);
if ($this->_gd_version >= 2) {
if ($this->_img['main']['indexedcolors'] == 0) {
$dummy = imagecreatetruecolor($this->_img['main']['width'], $this->_img['main']['height']);
imagecopy($dummy, $this->_img['main']['resource'], 0, 0, 0, 0, $this->_img['main']['width'], $this->_img['main']['height']);
if ($output_quality === false) {
$output_quality = IMAGE_TOOLBOX_DEFAULT_8BIT_COLORS;
}
imagetruecolortopalette($dummy, $dither, $output_quality);
}
imagegif($dummy);
imagedestroy($dummy);
}
else {
imagegif($this->_img['main']['resource']);
}
break;
case 2:
case '2':
case 'jpg':
case 'jpeg':
case 'JPG':
case 'JPEG':
if ($this->_types[2]['supported'] < 2) {
trigger_error($this->_error_prefix . 'Imagetype ('.$this->_types[$output_type]['ext'].') not supported for creating/writing.', E_USER_ERROR);
return null;
}
header ('Content-type: ' . $this->_types[$output_type]['mime']);
if ($output_quality === false) {
$output_quality = IMAGE_TOOLBOX_DEFAULT_JPEG_QUALITY;
}
imagejpeg($this->_img['main']['resource'], '', $output_quality);
break;
case 3:
case '3':
case 'png':
case 'PNG':
case 'png24':
case 'PNG24':
if ($this->_types[3]['supported'] < 2) {
trigger_error($this->_error_prefix . 'Imagetype ('.$this->_types[$output_type]['ext'].') not supported for creating/writing.', E_USER_ERROR);
return null;
}
header ('Content-type: ' . $this->_types[$output_type]['mime']);
imagepng($this->_img['main']['resource']);
break;
case 4:
case '4':
case 'png8':
case 'PNG8':
if ($this->_types[3]['supported'] < 2) {
trigger_error($this->_error_prefix . 'Imagetype ('.$this->_types[$output_type]['ext'].') not supported for creating/writing.', E_USER_ERROR);
return null;
}
header ('Content-type: ' . $this->_types[$output_type]['mime']);
if ($this->_gd_version >= 2) {
if ($this->_img['main']['indexedcolors'] == 0) {
$dummy = imagecreatetruecolor($this->_img['main']['width'], $this->_img['main']['height']);
imagecopy($dummy, $this->_img['main']['resource'], 0, 0, 0, 0, $this->_img['main']['width'], $this->_img['main']['height']);
if ($output_quality === false) {
$output_quality = IMAGE_TOOLBOX_DEFAULT_8BIT_COLORS;
}
imagetruecolortopalette($dummy, $dither, $output_quality);
}
imagepng($dummy);
imagedestroy($dummy);
}
else {
imagepng($this->_img['main']['resource']);
}
break;
default:
trigger_error($this->_error_prefix . 'Output-Imagetype not supported.', E_USER_ERROR);
return null;
}
return true;
}
/**
* Save a image to disk
*
* $output_type can be one of the following:<br>
* <ul>
* <li>'gif' -> gif image (if supported) (8-bit indexed colors)</li>
* <li>'png' -> png image (if supported) (truecolor)</li>
* <li>'png8' -> png image (if supported) (8-bit indexed colors)</li>
* <li>'jpg' -> jpeg image (if supported) (truecolor)</li>
* </ul>
* (default: same as original)
*
* $dither:<br>
* If this is true than dither is used on the conversion from truecolor to 8-bit indexed imageformats (png8, gif)<br>
* (default = false)
*
* @param string $filename filename of saved image
* @param string|integer $output_type type of saved image
* @param integer $output_quality jpeg quality of saved image (default: IMAGE_TOOLBOX_DEFAULT_JPEG_QUALITY)
* @param bool $dither use dither
* @return bool true on success, otherwise false
*/
function save($filename, $output_type = false, $output_quality = false, $dither = false) {
if ($output_type === false) {
$output_type = $this->_img['main']['output_type'];
}
switch ($output_type) {
case 1:
case 'gif':
case 'GIF':
if ($this->_types[1]['supported'] < 2) {
trigger_error($this->_error_prefix . 'Imagetype ('.$this->_types[$output_type]['ext'].') not supported for creating/writing.', E_USER_ERROR);
return null;
}
if ($this->_gd_version >= 2) {
if ($this->_img['main']['indexedcolors'] == 0) {
$dummy = imagecreatetruecolor($this->_img['main']['width'], $this->_img['main']['height']);
imagecopy($dummy, $this->_img['main']['resource'], 0, 0, 0, 0, $this->_img['main']['width'], $this->_img['main']['height']);
if ($output_quality === false) {
$output_quality = IMAGE_TOOLBOX_DEFAULT_8BIT_COLORS;
}
imagetruecolortopalette($dummy, $dither, $output_quality);
}
imagegif($dummy, $filename);
imagedestroy($dummy);
}
else {
imagegif($this->_img['main']['resource']);
}
break;
case 2:
case '2':
case 'jpg':
case 'jpeg':
case 'JPG':
case 'JPEG':
if ($this->_types[2]['supported'] < 2) {
trigger_error($this->_error_prefix . 'Imagetype ('.$this->_types[$output_type]['ext'].') not supported for creating/writing.', E_USER_ERROR);
return null;
}
if ($output_quality === false) {
$output_quality = IMAGE_TOOLBOX_DEFAULT_JPEG_QUALITY;
}
imagejpeg($this->_img['main']['resource'], $filename, $output_quality);
break;
case 3:
case '3':
case 'png':
case 'PNG':
case 'png24':
case 'PNG24':
if ($this->_types[3]['supported'] < 2) {
trigger_error($this->_error_prefix . 'Imagetype ('.$this->_types[$output_type]['ext'].') not supported for creating/writing.', E_USER_ERROR);
return null;
}
imagepng($this->_img['main']['resource'], $filename);
break;
case 4:
case '4':
case 'png8':
case 'PNG8':
if ($this->_types[3]['supported'] < 2) {
trigger_error($this->_error_prefix . 'Imagetype ('.$this->_types[$output_type]['ext'].') not supported for creating/writing.', E_USER_ERROR);
return null;
}
if ($this->_gd_version >= 2) {
if ($this->_img['main']['indexedcolors'] == 0) {
$dummy = imagecreatetruecolor($this->_img['main']['width'], $this->_img['main']['height']);
imagecopy($dummy, $this->_img['main']['resource'], 0, 0, 0, 0, $this->_img['main']['width'], $this->_img['main']['height']);
if ($output_quality === false) {
$output_quality = IMAGE_TOOLBOX_DEFAULT_8BIT_COLORS;
}
imagetruecolortopalette($dummy, $dither, $output_quality);
}
imagepng($dummy, $filename);
imagedestroy($dummy);
}
else {
imagepng($this->_img['main']['resource'], $filename);
}
break;
default:
trigger_error($this->_error_prefix . 'Output-Imagetype not supported.', E_USER_ERROR);
return null;
}
return true;
}
/**
* Sets the resize method of choice
*
* $method can be one of the following:<br>
* <ul>
* <li>'resize' -> supported by every version of GD (fast but ugly resize of image)</li>
* <li>'resample' -> only supported by GD version >= 2.0 (slower but antialiased resize of image)</li>
* <li>'workaround' -> supported by every version of GD (workaround function for bicubic resizing, downsizing, VERY slow!, taken from php.net comments)</li>
* <li>'workaround2' -> supported by every version of GD (alternative workaround function for bicubic resizing, down- and upsizing, VERY VERY slow!, taken from php.net comments)</li>
* </ul>
*
* @param string|integer $method resize method
* @return bool true on success, otherwise false
*/
function setResizeMethod($method) {
switch ($method) {
case 1:
case '1':
case 'resize':
$this->_resize_function = 'imagecopyresized';
break;
case 2:
case '2':
case 'resample':
if (!function_exists('imagecopyresampled')) {
// no error message. just return false.
return null;
}
$this->_resize_function = 'imagecopyresampled';
break;
case 3:
case '3':
case 'resample_workaround':
case 'workaround':
case 'bicubic':
$this->_resize_function = '$this->_imageCopyResampledWorkaround';
break;
case 4:
case '4':
case 'resample_workaround2':
case 'workaround2':
case 'bicubic2':
$this->_resize_function = '$this->_imageCopyResampledWorkaround2';
break;
default:
trigger_error($this->_error_prefix . 'Resizemethod not supported.', E_USER_ERROR);
return null;
}
return true;
}
/**
* Resize the current image
*
* if $width = 0 the new width will be calculated from the $height value preserving the correct aspectratio.<br>
*
* if $height = 0 the new height will be calculated from the $width value preserving the correct aspectratio.<br>
*
* $mode can be one of the following:<br>
* <ul>
* <li>0 -> image will be resized to the new output size, regardless of the original aspectratio. (default)</li>
* <li>1 -> image will be cropped if necessary to preserve the aspectratio and avoid image distortions.</li>
* <li>2 -> image will be resized preserving its original aspectratio. differences to the new outputsize will be filled with $bgcolor</li>
* </ul>
*
* if $autorotate is set to true the given $width and $height values may "change place" if the given image bias is different from the original one.<br>
* if either $width or $height is 0, the new size will be applied to either the new width or the new height based on the bias value of the original image.<br>
* (default = false)
*
* @param integer $width new width of image
* @param integer $height new height of image
* @param integer $mode resize mode
* @param bool $autorotate use autorotating
* @param string $bgcolor background fillcolor (hexformat, e.g. '#FF0000')
* @return bool true on success, otherwise false
*/
function newOutputSize($width, $height, $mode = 0, $autorotate = false, $bgcolor = '#000000') {
if ($width > 0 && $height > 0 && is_int($width) && is_int($height)) {
//ignore aspectratio
if (!$mode) {
//do not crop to get correct aspectratio
($width >= $height) ? ($this->_img['target']['bias'] = IMAGE_TOOLBOX_BIAS_HORIZONTAL) : ($this->_img['target']['bias'] = IMAGE_TOOLBOX_BIAS_VERTICAL);
if ($this->_img['main']['bias'] == $this->_img['target']['bias'] || !$autorotate) {
$this->_img['target']['width'] = $width;
$this->_img['target']['height'] = $height;
} else {
$this->_img['target']['width'] = $height;
$this->_img['target']['height'] = $width;
}
$this->_img['target']['aspectratio'] = $this->_img['target']['width'] / $this->_img['target']['height'];
$cpy_w = $this->_img['main']['width'];
$cpy_h = $this->_img['main']['height'];
$cpy_w_offset = 0;
$cpy_h_offset = 0;
} elseif ($mode == 1) {
//crop to get correct aspectratio
($width >= $height) ? ($this->_img['target']['bias'] = IMAGE_TOOLBOX_BIAS_HORIZONTAL) : ($this->_img['target']['bias'] = IMAGE_TOOLBOX_BIAS_VERTICAL);
if ($this->_img['main']['bias'] == $this->_img['target']['bias'] || !$autorotate) {
$this->_img['target']['width'] = $width;
$this->_img['target']['height'] = $height;
} else {
$this->_img['target']['width'] = $height;
$this->_img['target']['height'] = $width;
}
$this->_img['target']['aspectratio'] = $this->_img['target']['width'] / $this->_img['target']['height'];
if ($this->_img['main']['width'] / $this->_img['target']['width'] >= $this->_img['main']['height'] / $this->_img['target']['height']) {
$cpy_h = $this->_img['main']['height'];
$cpy_w = (integer) $this->_img['main']['height'] * $this->_img['target']['aspectratio'];
$cpy_w_offset = (integer) ($this->_img['main']['width'] - $cpy_w) / 2;
$cpy_h_offset = 0;
} else {
$cpy_w = $this->_img['main']['width'];
$cpy_h = (integer) $this->_img['main']['width'] / $this->_img['target']['aspectratio'];
$cpy_h_offset = (integer) ($this->_img['main']['height'] - $cpy_h) / 2;
$cpy_w_offset = 0;
}
}
elseif ($mode == 2) {
//fill remaining background with a color to keep aspectratio
$final_aspectratio = $width / $height;
if ($final_aspectratio < $this->_img['main']['aspectratio']) {
$this->_img['target']['width'] = $width;
$this->_img['target']['height'] = (integer) $width / $this->_img['main']['aspectratio'];
$cpy_w_offset2 = 0;
$cpy_h_offset2 = (integer) (($height - $this->_img['target']['height']) / 2);
}
else {
$this->_img['target']['height'] = $height;
$this->_img['target']['width'] = (integer) $height * $this->_img['main']['aspectratio'];
$cpy_h_offset2 = 0;
$cpy_w_offset2 = (integer) (($width - $this->_img['target']['width']) / 2);
}
$this->_img['target']['aspectratio'] = $this->_img['main']['aspectratio'];
$cpy_w = $this->_img['main']['width'];
$cpy_h = $this->_img['main']['height'];
$cpy_w_offset = 0;
$cpy_h_offset = 0;
}
} elseif (($width == 0 && $height > 0) || ($width > 0 && $height == 0) && is_int($width) && is_int($height)) {
//keep aspectratio
if ($autorotate == true) {
if ($this->_img['main']['bias'] == IMAGE_TOOLBOX_BIAS_HORIZONTAL && $width > 0) {
$height = $width;
$width = 0;
} elseif ($this->_img['main']['bias'] == IMAGE_TOOLBOX_BIAS_VERTICAL && $height > 0) {
$width = $height;
$height = 0;
}
}
($width >= $height) ? ($this->_img['target']['bias'] = IMAGE_TOOLBOX_BIAS_HORIZONTAL) : ($this->_img['target']['bias'] = IMAGE_TOOLBOX_BIAS_VERTICAL);
if ($width != 0) {
$this->_img['target']['width'] = $width;
$this->_img['target']['height'] = (integer) $width / $this->_img['main']['aspectratio'];
} else {
$this->_img['target']['height'] = $height;
$this->_img['target']['width'] = (integer) $height * $this->_img['main']['aspectratio'];
}
$this->_img['target']['aspectratio'] = $this->_img['main']['aspectratio'];
$cpy_w = $this->_img['main']['width'];
$cpy_h = $this->_img['main']['height'];
$cpy_w_offset = 0;
$cpy_h_offset = 0;
} else {
trigger_error($this->_error_prefix . 'Outputwidth and -height must be integers greater zero.', E_USER_ERROR);
return null;
}
//create resized picture
$functionname = $this->_imagecreatefunction;
$dummy = $functionname($this->_img['target']['width'] + 1, $this->_img['target']['height'] + 1);
eval($this->_resize_function . '($dummy, $this->_img["main"]["resource"], 0, 0, $cpy_w_offset, $cpy_h_offset, $this->_img["target"]["width"], $this->_img["target"]["height"], $cpy_w, $cpy_h);');
if ($mode == 2) {
$this->_img['target']['resource'] = $functionname($width, $height);
$fillcolor = $this->_hexToPHPColor($bgcolor);
imagefill($this->_img['target']['resource'], 0, 0, $fillcolor);
} else {
$this->_img['target']['resource'] = $functionname($this->_img['target']['width'], $this->_img['target']['height']);
$cpy_w_offset2 = 0;
$cpy_h_offset2 = 0;
}
imagecopy($this->_img['target']['resource'], $dummy, $cpy_w_offset2, $cpy_h_offset2, 0, 0, $this->_img['target']['width'], $this->_img['target']['height']);
imagedestroy($dummy);
if ($mode == 2) {
$this->_img['target']['width'] = $width;
$this->_img['target']['height'] = $height;
}
//update _img['main'] with new data
foreach ($this->_img['target'] as $key => $value) {
$this->_img['main'][$key] = $value;
}
unset ($this->_img['target']);
return true;
}
/**
* Adds a new image resource based on the given parameters.
*
* It does not overwrite the existing image resource.<br>
* Instead it is used to load a second image to merge with the existing image.
*
* Parameter:<br>
* <i>string</i> <b>$file</b> imagefile to load<br>
* Or:<br>
* <i>integer</i> <b>$width</b> imagewidth of new image to be created<br>
* <i>integer</i> <b>$height</b> imageheight of new image to be created<br>
* <i>string</i> <b>$fillcolor</b> optional fill the new image with this color (hexformat, e.g. '#FF0000')<br>
*/
function addImage() {
$args = func_get_args();
$argc = func_num_args();
if ($this->_addImage($argc, $args)) {
return true;
} else {
trigger_error($this->_error_prefix . 'failed to add image.', E_USER_ERROR);
return false;
}
}
/**
* Blend two images.
*
* Original image and the image loaded with {@link addImage() addImage}<br>
* NOTE: This operation can take very long and is not intended for realtime use.
* (but of course depends on the power of your server :) )
*
* IMPORTANT: {@link imagecopymerge() imagecopymerged} doesn't work with PHP 4.3.2. Bug ID: {@link http://bugs.php.net/bug.php?id=24816 24816}<br>
*
* $x:<br>
* negative values are possible.<br>
* You can also use the following keywords ('left', 'center' or 'middle', 'right').<br>
* Additionally you can specify an offset in pixel with the keywords like this 'left +10'.<br>
* (default = 0)
*
* $y:<br>
* negative values are possible.<br>
* You can also use the following keywords ('top', 'center' or 'middle', 'bottom').<br>
* Additionally you can specify an offset in pixel with the keywords like this 'bottom -10'.<br>
* (default = 0)
*
* Possible values for $mode:
* <ul>
* <li>IMAGE_TOOLBOX_BLEND_COPY</li>
* <li>IMAGE_TOOLBOX_BLEND_MULTIPLY</li>
* <li>IMAGE_TOOLBOX_BLEND_SCREEN</li>
* <li>IMAGE_TOOLBOX_BLEND_DIFFERENCE</li>
* <li>IMAGE_TOOLBOX_BLEND_EXCLUSION</li>
* <li>IMAGE_TOOLBOX_BLEND_OVERLAY</li>
* </ul>
*
* $percent:<br>
* alpha value in percent of blend effect (0 - 100)<br>
* (default = 100)
*
* @param string|integer $x Horizontal position of second image.
* @param integer $y Vertical position of second image. negative values are possible.
* @param integer $mode blend mode.
* @param integer $percent alpha value
*/
function blend($x = 0, $y = 0, $mode = IMAGE_TOOLBOX_BLEND_COPY, $percent = 100) {
if (is_string($x) || is_string($y)) {
list($xalign, $xalign_offset) = explode(" ", $x);
list($yalign, $yalign_offset) = explode(" ", $y);
}
if (is_string($x)) {
switch ($xalign) {
case 'left':
$dst_x = 0 + $xalign_offset;
$src_x = 0;
$src_w = $this->_img['operator']['width'];
break;
case 'right':
$dst_x = ($this->_img['main']['width'] - $this->_img['operator']['width']) + $xalign_offset;
$src_x = 0;
$src_w = $this->_img['operator']['width'];
break;
case 'middle':
case 'center':
$dst_x = (($this->_img['main']['width'] / 2) - ($this->_img['operator']['width'] / 2)) + $yalign_offset;
$src_x = 0;