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<?php
/**
* @package Sj Video
* @version 1.0
* @license http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL
* @copyright (c) 2013 YouTech Company. All Rights Reserved.
* @author YouTech Company http://www.smartaddons.com
*
*/
defined('_JEXEC') or die;
class ImageHelper{
protected static $instances = array();
protected static $defaults = array(
'type' => null,
'width' => null,
'height' => null,
'quality' => 90,
'function' => null,
'function_mode' => null,
'transparency' => true,
'background' => array('r'=>255, 'g'=>255, 'b'=>255)
);
public static $cache = null;
public static $cache_url = null;
public static $supports = array(
IMAGETYPE_PNG,
IMAGETYPE_GIF,
IMAGETYPE_JPEG
);
public static $functions = array(
'resize',
'crop',
'rotate',
'flip_horizontal',
'flip_vertical'
);
public static $modes = array(
'center',
'fill',
'fit',
'stretch'
);
protected $image = null;
protected $in = null;
protected $out = null;
protected $errors = array();
protected $options = null;
protected $_process = 1;
protected $debug = false;
/**
*
* @param mixed $image
* @param array $options
* @return ImageHelper
*/
public static function init($image, $options = array()){
$cacheid = count(self::$instances);
if (!isset(self::$instances[$cacheid])){
self::$instances[$cacheid] = new ImageHelper($image, $options);
}
return self::$instances[$cacheid];
}
/**
* ImageHelper constructor
* @param unknown_type $image
* @param unknown_type $options
*/
public function __construct($image = null, $options = array()){
!is_null($image) && $this->image = $image;
// defaults
foreach (ImageHelper::$defaults as $name => $value){
$this->options[$name] = array_key_exists($name, $options) ? $options[$name] : $value;
}
$this->in = array(
'type'=>null,
'src' =>null
);
$this->out = array();
$this->initCache($options);
$this->debug && JFactory::getApplication()->enqueueMessage('ImageHelper::__construct');
}
public static function setDefault($params = null){
self::$defaults = array(
'type' => null,
'width' => null,
'height' => null,
'quality' => 90,
'function' => null,
'function_mode' => null,
'transparency' => true,
'background' => array('r'=>255, 'g'=>255, 'b'=>255)
);
if ($params instanceof JRegistry){
$opts = array();
// output type ?
$imgcfg_type = $params->get('imgcfg_type', 0);
if (in_array($imgcfg_type, array(IMAGETYPE_JPEG, IMAGETYPE_PNG, IMAGETYPE_GIF))){
$opts['type'] = $imgcfg_type;
}
// function ?
$imgcfg_fn = $params->get('imgcfg_function', 'none_resize');
$imgcfg_fn = explode('_', $imgcfg_fn);
if ( in_array($imgcfg_fn[0], self::$functions) ){
$opts['function'] = $imgcfg_fn[0];
if ($imgcfg_fn[0] == 'resize'){
if ( isset($imgcfg_fn[1]) && in_array($imgcfg_fn[1], self::$modes) ){
$opts['function_mode'] = $imgcfg_fn[1];
} else {
$opts['function_mode'] = self::$modes[2];
}
}
}
// background
$imgcfg_background = $params->get('imgcfg_background', null);
if (!is_null($imgcfg_background)){
$opts['background'] = $imgcfg_background;
}
// quality
$imgcfg_quality = $params->get('imgcfg_quality', null);
if ( $imgcfg_quality != null && intval($imgcfg_quality) > 0 && intval($imgcfg_quality) < 100 ){
$opts['quality'] = intval($imgcfg_quality);
}
// transparency
$imgcfg_transparency = $params->get('imgcfg_transparency', 1);
if ( $imgcfg_transparency != null){
$opts['transparency'] = $imgcfg_transparency ? true : false;
}
// dimension ?
$imgcfg_w = $params->get('imgcfg_width', 0);
$imgcfg_h = $params->get('imgcfg_height', 0);
if ( intval($imgcfg_w) > 0 ){
$opts['width'] = $imgcfg_w;
}
if ( intval($imgcfg_h) > 0 ){
$opts['height'] = $imgcfg_h;
}
self::$cache = $params->get('imgcfg_cache');
self::$cache_url = $params->get('imgcfg_cache_url');
// $this->initCache($cache_params);
}
self::$defaults = array_merge(self::$defaults, $opts);
}
public static function testDefault(){
echo 'ImageHelper::$defaults'.'<br>';
//var_dump(self::$defaults);
}
/**
* convert absolute path in joomla to url (not 4 script file)
* @param string $jpath must contain JPATH_BASE
* @return string
*/
public function jpath2url($jpath){
$realpath = realpath($jpath);
if (!empty($realpath) && defined('JPATH_BASE')){
$jpathbase = realpath(JPATH_BASE);
if (stripos($realpath, $jpathbase)===0){
$subpath = str_replace($jpathbase, '', $realpath);
if (!empty($subpath) && DIRECTORY_SEPARATOR==$subpath[0]){
$subpath = substr($subpath, 1);
}
return JPath::clean($subpath, '/');
}
}
return $jpath;
}
public function initCache($options = array()){
$private_cache = array_key_exists('cache', $options) ? $options['cache'] : null;
$private_cache_url = array_key_exists('cache_url', $options) ? $options['cache_url'] : null;
if (empty($private_cache)){
if (is_null(ImageHelper::$cache) && defined('JPATH_CACHE')){
ImageHelper::$cache = JPATH_CACHE.'/resized';
if (!file_exists(ImageHelper::$cache)){
if (!@mkdir(ImageHelper::$cache, 0755, true)){
ImageHelper::$cache = null;
}
}
}
if (is_null(ImageHelper::$cache)){
ImageHelper::$cache = dirname(__FILE__).'/resized';
if (!file_exists(ImageHelper::$cache)){
if (!@mkdir(ImageHelper::$cache, 0755, true)){
ImageHelper::$cache = null;
}
}
}
if (is_null(ImageHelper::$cache)){
$this->errors[] = 'Can not create cache folder!';
} else {
$private_cache = ImageHelper::$cache;
}
}
if (empty($private_cache_url)){
if (empty($private_cache)){
// noop
} else {
$private_cache_url = $this->jpath2url($private_cache);
}
}
$this->out['cache'] = $private_cache;
$this->out['cache_url'] = $private_cache_url;
}
/**
* Get image type for input url or path of file.
* @return mixed
*/
protected function getInputType(){
if ( !isset($this->in['type']) ){
$this->debug && JFactory::getApplication()->enqueueMessage('ImageHelper::getInputType');
if (is_string($this->image)){
$path = $this->image;
} else {
$path = @$this->image['src'];
}
if (is_string($path)){
$ps = JString::parse_url($path);
if ( array_key_exists('path', $ps) && !empty($ps['path']) ){
$isHttp = isset($ps['scheme']) && in_array($ps['scheme'], array('http', 'https'));
if (!$isHttp || JURI::isInternal($path)){
$path = $ps['path'];
} else {
// is extenal url.
$this->in['type'] = 'url';
$this->in['src'] = $path;
return $this->in['type'];
}
}
} else if (!$path){
$this->errors[] = 'Image path must be string or stored in array_argument[src]!';
}
if ( !file_exists($path) ){
$this->errors[] = 'Image path is not exists!';
} else {
$this->in['src'] = realpath($path);
$infor = array();
if ( !function_exists('exif_imagetype') ){
$intype = exif_imagetype($path);
} else {
$infor = getimagesize($path);
$intype= @$infor[2];
}
switch ($intype){
case IMAGETYPE_PNG:
$this->in['type'] = IMAGETYPE_PNG;
break;
case IMAGETYPE_GIF:
$this->in['type'] = IMAGETYPE_GIF;
break;
case IMAGETYPE_JPEG:
$this->in['type'] = IMAGETYPE_JPEG;
break;
default:
}
}
}
return $this->in['type'];
}
protected function getInputResource(){
$this->debug && JFactory::getApplication()->enqueueMessage('ImageHelper::getInputResource');
//var_dump('getInputResource: '.$this->in['src']);
if ( !isset($this->in['image']) ){
$intype = $this->getInputType();
switch ($intype){
case IMAGETYPE_PNG:
$this->in['image'] = imagecreatefrompng($this->in['src']);
break;
case IMAGETYPE_GIF:
$this->in['image'] = imagecreatefromgif($this->in['src']);
break;
case IMAGETYPE_JPEG:
$this->in['image'] = imagecreatefromjpeg($this->in['src']);
break;
default:
$this->in['image'] = null;
return false;
}
}
return is_resource($this->in['image']) ? $this->in['image'] : null;
}
protected function validOptions(){
$this->debug && JFactory::getApplication()->enqueueMessage('ImageHelper::validOptions');
// TODO: validate input
$type = $this->getInputType();
$input_type_ok = ($type=='url') || in_array($type, ImageHelper::$supports);
if ( !$input_type_ok ){
$this->errors[] = 'Input type is not supported!';
$this->_process = 0;
} else if ($type=='url'){
$this->_process = 0;
}
// required options
$output_type_ok = !is_null($this->options['type']) && in_array($this->options['type'], ImageHelper::$supports);
if ( !$output_type_ok ){
if ( $input_type_ok ){
$this->options['type'] = $type;
}
}
if ( !($this->options['width']>0 || $this->options['height']>0) ){
$this->errors[] = 'Output width or height must be greater than zero (>0)!';
$this->_process = 0;
}
if ( in_array($this->options['function'], ImageHelper::$functions) ){
if ($this->options['function'] == 'resize' && !in_array($this->options['function_mode'], ImageHelper::$modes)){
$this->errors[] = 'Resize mode is not valid! should be in ['.implode(', ', ImageHelper::$modes).']';
$this->_process = 0;
}
} else {
$this->errors[] = 'Output function is not valid! should be in ['.implode(', ', ImageHelper::$functions).']';
$this->_process = 0;
}
// auto parse options
if ( !isset($this->options['quality']) || !is_numeric($this->options['quality']) || $this->options['quality']==0 ){
$this->options['quality'] = 90;
} else {
if ($this->options['quality'] < 10){
$this->options['quality'] = 10;
}
if ($this->options['quality'] > 100){
$this->options['quality'] = 100;
}
}
$c = &$this->options['background'];
if ( is_string($this->options['background']) ){
if ( preg_match('/^#?([a-fA-F0-9]{3}|[a-fA-F0-9]{6})$/i', $this->options['background'], $m) ){
$hex = isset($m[1]) ? $m[1] : null;
if (strlen($hex)==3){
$hex = $hex[0].$hex[0].$hex[1].$hex[1].$hex[2].$hex[2];
}
if ($hex){
$dec = hexdec($hex);
$this->options['background'] = array(
'r' => 0xFF & ($dec >> 0x10),
'g' => 0xFF & ($dec >> 0x8),
'b' => 0xFF & $dec
);
} else {
$this->options['background'] = null;
}
} else {
$this->options['background'] = null;
}
}
if ( !is_array($this->options['background']) ){
$this->options['background'] = null;
} else {
$valid = 1;
$bg = $this->options['background'];
foreach (array('r', 'g', 'b') as $e){
if ( !array_key_exists($e, $bg) || ($bg[$e]<0) || ($bg[$e]>255) ){
$valid = 0;
break;
}
}
if (!$valid){
$this->options['background'] = null;
}
}
return count($this->errors) == 0;
}
protected function getOutputFile(){
if ( !array_key_exists('src', $this->out) || is_null($this->out['src']) ){
$this->debug && JFactory::getApplication()->enqueueMessage('ImageHelper::getOutputFile');
$hash = md5( serialize( array($this->options, $this->in['src'], $this->in['type']) ) );
if (defined('DEBUG') && 0){
$hash = basename($this->in['src'], '.jpg');
$w = isset($this->options['width']) ? $this->options['width'] : 0;
$h = isset($this->options['height']) ? $this->options['height'] : 0;
$hash .= '-'.$w.'x'.$h;
$hash .= '-'.$this->options['function'];
$hash .= '-'.$this->options['function_mode'];
$hash .= '-'.$this->options['quality'];
}
switch ($this->options['type']){
case IMAGETYPE_PNG:
$ext = '.png';
break;
case IMAGETYPE_GIF:
$ext = '.gif';
break;
case IMAGETYPE_JPEG:
$ext = '.jpg';
break;
default:
$ext = image_type_to_extension($this->options['type'], true);
}
$this->out['src'] = $this->out['cache'].'/'.$hash.$ext;
$this->save2f();
$this->debug && JFactory::getApplication()->enqueueMessage('ImageHelper::getOutputFile::::'.$this->out['src']);
}
return $this->out['src'];
}
protected function getOutputUrl(){
if (!isset($this->out['url'])){
$this->debug && JFactory::getApplication()->enqueueMessage('ImageHelper::getOutputUrl');
if ( $this->validOptions() && in_array($this->options['type'], ImageHelper::$supports) ){
$this->out['url'] = $this->out['cache_url'].'/'.basename( $this->getOutputFile() );
} else {
$original = is_string($this->image) ? $this->image : @$this->image['src'];
if (!(stripos($original, 'http')===0)){
$original = $this->jpath2url($original);
}
$this->out['url'] = $original;
$this->debug && JFactory::getApplication()->enqueueMessage('Not validOptions:: '.$this->out['url']);
}
$is_ajax = ! empty ( $_SERVER ['HTTP_X_REQUESTED_WITH'] ) && strtolower ( $_SERVER ['HTTP_X_REQUESTED_WITH'] ) == 'xmlhttprequest';
if ($is_ajax && !(stripos($this->out['url'], 'http')===0)){
$this->out['url'] = JUri::root(). $this->out['url'];
}
}
return $this->out['url'];
}
/**
* @return mixed
*/
public function output(){
if ( $this->validOptions() && $this->getInputResource()){
$this->debug && JFactory::getApplication()->enqueueMessage('ImageHelper::output');
$this->process();
if (is_resource($this->out['image'])){
$oImage = &$this->out['image'];
switch( $this->options['type'] ){
case IMAGETYPE_JPEG:
imagejpeg($oImage, $this->getOutputFile(), $this->options['quality']);
break;
case IMAGETYPE_GIF:
imagegif($oImage, $this->getOutputFile());
break;
case IMAGETYPE_PNG:
imagepng($oImage, $this->getOutputFile(), 10 - round($this->options['quality']/10.0));
break;
}
}
}
}
/**
*@return string
*/
public function tag(){
$this->debug && JFactory::getApplication()->enqueueMessage('ImageHelper::tag');
if (!$this->getOutputUrl()){
return '';
}
$tag = array();
if (is_array($this->image)){
foreach ($this->image as $att => $val){
if ($att == 'src'){
$tag[] = 'src="'.$this->getOutputUrl().'"';
} else {
$tag[] = $att.'="'.$val.'"';
}
}
if (!array_key_exists('alt', $this->image)){
$tag[] = 'alt="'.$this->getOutputUrl().'"';
}
} else {
$tag[] = 'src="'.$this->getOutputUrl().'"';
$tag[] = 'alt="'.$this->getOutputUrl().'"';
}
return count($tag) ? '<img '.implode(' ', $tag).'/>' : '';
}
/**
* @return string
*/
public function path(){
$this->debug && JFactory::getApplication()->enqueueMessage('ImageHelper::path');
return $this->__toString();
}
public function src(){
$this->debug && JFactory::getApplication()->enqueueMessage('ImageHelper::src');
return $this->getOutputUrl();
}
/**
* @return string
*/
public function error(){
$this->debug && JFactory::getApplication()->enqueueMessage('ImageHelper::error');
return $this->errors;
}
/**
* Resize input image by size
* @param int $w
* @param int $h
* @return ImageHelper
*/
public function resize($w = 0, $h = 0){
$this->debug && JFactory::getApplication()->enqueueMessage('ImageHelper::resize');
if ($w > 0) $this->options['width'] = $w;
if ($h > 0) $this->options['height'] = $h;
return $this;
}
protected function actionPerformed(){
$this->debug && JFactory::getApplication()->enqueueMessage('ImageHelper::actionPerformed');
$sImage = $this->getInputResource();
if ( !is_resource($sImage) ) return;
$sw = imagesx($sImage);
$sh = imagesy($sImage);
if ( $this->options['function']=='resize' ){
$ow = is_null($this->options['width']) ? 0 : intval($this->options['width']);
$oh = is_null($this->options['height']) ? 0 : intval($this->options['height']);
if ( $ow==0 && $oh==0 ){
die('thoi khoi resize');
} else if ($ow == 0){
// resize by height.
$this->options['function_mode'] = ImageHelper::$modes[3];
$ow = $this->options['width'] = round($oh * $sw/$sh);
} else if ($oh == 0){
$this->options['function_mode'] = ImageHelper::$modes[3];
$oh = $this->options['height'] = (int)round($ow * $sh/$sw);
// resize by width
} else if ( abs($oh-round($ow*$sh/$sw)) <= 1 ){
// resize by ca hai
$this->options['function_mode'] = ImageHelper::$modes[3];
$oh = $this->options['height'] = round($ow*$sh/$sw);
}
$oImage = $this->getCanvas();
// build agrs
$sx = $sy = 0;
$dx = $dy = 0;
$dw = $sw;
$dh = $sh;
switch($this->options['function_mode']){
case ImageHelper::$modes[0]:
if ($ow > $dw) {
$dx = ($ow-$dw)/2;
}
if ($oh > $dh) {
$dy = ($oh-$dh)/2;
}
if ($sw > $ow){
$sx = ($sw-$ow)/2;
}
if ($sh > $oh){
$sy = ($sh-$oh)/2;
}
break;
case ImageHelper::$modes[1]:
$or = 1.0*$sw/$sh;
if ($ow < $oh*$or){
$dw = round($oh*$or);
$dh = $oh;
$dx = ($ow-$dw)/2;
$dy = 0;
} else {
$dw = $ow;
$dh = round($ow/$or);
$dx = 0;
$dy = ($oh-$dh)/2;
}
break;
case ImageHelper::$modes[2]:
$or = 1.0*$sw/$sh;
if ($ow > $oh*$or){
$dw = round($oh*$or);
$dh = $oh;
$dx = ($ow-$dw)/2;
$dy = 0;
} else {
$dw = $ow;
$dh = round($ow/$or);
$dx = 0;
$dy = ($oh-$dh)/2;
}
break;
default:
case ImageHelper::$modes[3]:
$dw = $ow;
$dh = $oh;
break;
}
imagecopyresampled(
$oImage,
$sImage,
$dx, $dy, $sx, $sy,
$dw, $dh, $sw, $sh
);
$this->out['image'] = $oImage;
}
return 1;
}
// public function __destruct(){
// $this->save2f();
// $this->debug && JFactory::getApplication()->enqueueMessage('ImageHelper::__destruct');
// }
protected function save2f(){
$this->debug && JFactory::getApplication()->enqueueMessage('ImageHelper::save2f');
if ($this->_process && ($of = $this->getOutputFile()) && !file_exists($of)){
$this->actionPerformed();
if ( array_key_exists('image', $this->out) && is_resource($this->out['image'])){
$oImage = &$this->out['image'];
switch( $this->options['type'] ){
case IMAGETYPE_JPEG:
imagejpeg($oImage, $of, $this->options['quality']);
break;
case IMAGETYPE_GIF:
imagegif($oImage, $of);
break;
case IMAGETYPE_PNG:
imagepng($oImage, $of, 10 - round($this->options['quality']/10.0));
break;
}
}
}
}
protected function getCanvas(){
if ( !isset($this->out['image']) ){
$this->debug && JFactory::getApplication()->enqueueMessage('ImageHelper::getCanvas');
$oImage = imagecreatetruecolor($this->options['width'], $this->options['height']);
if ($this->options['transparency'] && in_array($this->options['type'], array(IMAGETYPE_GIF, IMAGETYPE_PNG))){
if (IMAGETYPE_GIF == $this->in['type']){
$trans_index = imagecolortransparent($this->in['image']);
if ($trans_index >= 0) {
$trans_color = imagecolorsforindex($this->in['image'], $trans_index);
$trans_index = imagecolorallocate($oImage, $trans_color['red'], $trans_color['green'], $trans_color['blue']);
imagefill($oImage, 0, 0, $trans_index);
imagecolortransparent($oImage, $trans_index);
}
} else if (IMAGETYPE_PNG == $this->in['type']){
$png_alpha = ((ord(file_get_contents($this->in['src'], false, null, 25, 1)) & 6) & 4) == 4;
if ($png_alpha){
imagealphablending($oImage, true);
$transparent = imagecolorallocatealpha($oImage, 0, 0, 0, 127);
imagefilledrectangle($oImage, 0, 0, $this->options['width'], $this->options['height'], $transparent);
imagealphablending($oImage, false);
imagesavealpha($oImage, true);
}
}
} else if ( !is_null($this->options['background'])
&& $this->options['function']==ImageHelper::$functions[0]
&& in_array($this->options['function_mode'], array(ImageHelper::$modes[0], ImageHelper::$modes[2]))){
$bgc = imagecolorallocate(
$oImage,
$this->options['background']['r'],
$this->options['background']['g'],
$this->options['background']['b']
);
imagefilledrectangle($oImage, 0, 0, $this->options['width'], $this->options['height'], $bgc);
}
$this->out['image'] = $oImage;
}
return $this->out['image'];
}
public function __toString(){
$this->debug && JFactory::getApplication()->enqueueMessage('ImageHelper::__toString');
$f = $this->getOutputFile();
return is_null($f) ? '' : $f;
}
}