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<?php
/**
* @copyright Copyright (c) 2013 Skyline Technology Ltd (http://extstore.com). All rights reserved.
* @license http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL
*/
// No direct access.
defined('_JEXEC') or die;
/**
* Image Library.
* @package Joomla.Administrator
* @subpakage ExtStore.AdvPortfolioPro
*/
class AdvPortfolioProImageLib {
/**
* Get version of GD library.
* @access public
* @since 1.0
*/
public static function getGDVersion($user_ver = 0) {
if (!extension_loaded('gd')) {
return;
}
static $gd_ver = 0;
// just accept the specified setting if it's 1.
if ($user_ver == 1) {
$gd_ver = 1;
return 1;
}
// use static variable if function was cancelled previously.
if ($user_ver != 2 && $gd_ver > 0) {
return $gd_ver;
}
// use the gd_info() function if posible.
if (function_exists('gd_info')) {
$ver_info = gd_info();
$match = null;
preg_match('/\d/', $ver_info['GD Version'], $match);
$gd_ver = $match[0];
return $match[0];
}
// if phpinfo() is disabled use a specified / fail-safe choice...
if (preg_match('/phpinfo/', ini_get('disable_functions'))) {
if ($user_ver == 2) {
$gd_ver = 2;
return 2;
} else {
$gd_ver = 1;
return 1;
}
}
// ...otherwise use phpinfo().
ob_start();
phpinfo(8);
$info = ob_get_contents();
ob_end_clean();
$info = stristr($info, 'gd version');
$match = null;
preg_match('/\d/', $info, $match);
$gd_ver = $match[0];
return $match[0];
}
/**
* Get real image width and height to resize.
* @access public
* @since 1.0
*/
public static function getSize($image, $width, $height) {
$info = @getimagesize($image); // width = info[0], height = info[1]
if ($info[0] < $width && $info[1] < $height) {
return array($info[0], $info[1]);
}
if ($info[0] / $width > $info[1] / $height) {
$percentage = $width / $info[0];
} else {
$percentage = $height / $info[1];
}
return array(round($info[0] * $percentage), round($info[1] * $percentage));
}
/**
* Get real size.
* @access public
* @since 1.0
*/
public static function imageResize($width, $height, $max_width, $max_height) {
if ($width < $max_width && $height < $max_height) {
return array($width, $height);
}
if ($width / $max_width > $height / $max_height) {
$percentage = $max_width / $width;
} else {
$percentage = $max_height / $height;
}
return array(round($width * $percentage), round($height * $percentage));
}
/**
* Get image filename to upload.
* @access public
* @since 1.0
*/
public static function sanitize($base_dir, $filename) {
jimport('joomla.filesystem.file');
//check for any leading/trailing dots and remove them (trailing shouldn't be possible cause of the getEXT check)
$filename = preg_replace("/^[.]*/", '', $filename);
$filename = preg_replace("/[.]*$/", '', $filename); //shouldn't be necessary, see above
//we need to save the last dot position cause preg_replace will also replace dots
$lastdotpos = strrpos($filename, '.');
//replace invalid characters
$chars = '[^0-9a-zA-Z()_-]';
$filename = strtolower(preg_replace("/$chars/", '_', $filename));
//get the parts before and after the dot (assuming we have an extension...check was done before)
$beforedot = substr($filename, 0, $lastdotpos);
$afterdot = substr($filename, $lastdotpos + 1);
//make a unique filename for the image and check it is not already taken
//if it is already taken keep trying till success
$now = time();
while (JFile::exists($base_dir . $beforedot . '_' . $now . '.' . $afterdot)) {
$now++;
}
//create out of the seperated parts the new filename
$filename = $beforedot . '_' . $now . '.' . $afterdot;
return $filename;
}
/**
* Add image subfix.
* @access public
* @since 1.0
*/
public static function addSubfix($filename, $subfix) {
//check for any leading/trailing dots and remove them (trailing shouldn't be possible cause of the getEXT check)
$filename = preg_replace("/^[.]*/", '', $filename);
$filename = preg_replace("/[.]*$/", '', $filename); //shouldn't be necessary, see above
//we need to save the last dot position cause preg_replace will also replace dots
$lastdotpos = strrpos($filename, '.');
//replace invalid characters
$chars = '[^0-9a-zA-Z()_-]';
$filename = strtolower(preg_replace("/$chars/", '_', $filename));
//get the parts before and after the dot (assuming we have an extension...check was done before)
$beforedot = substr($filename, 0, $lastdotpos);
$afterdot = substr($filename, $lastdotpos + 1);
$filename = $beforedot . '_' . $subfix . '.' . $afterdot;
return $filename;
}
/**
* Check image for uploading.
* @access public
* @since 1.0
*/
public static function check($file) {
jimport('joomla.filesystem.file');
$allowable = explode(',', str_replace(' ', '', 'jpg, jpeg, png, gif'));
// $sizelimit = $maxsize * 1024; //size limit in kb
$imagesize = $file['size'];
// check if the upload is an image...getimagesize will return false if not
if (!getimagesize($file['tmp_name'])) {
JError::raiseWarning(100, JText::_('ADVPORTFOLIOPRO_IMAGEHANDLER_FILE_ERROR') . ': ' . htmlspecialchars($file['name'], ENT_COMPAT, 'UTF-8'));
return false;
}
// check if the imagefiletype is valid
$fileext = strtolower(JFile::getExt($file['name']));
if (!in_array(strtolower($fileext), $allowable)) {
$allowed_exts = implode(', ', $allowable);
JError::raiseWarning(100, JText::printf('ADVPORTFOLIOPRO_EXTENSIONS_ALLOWS', $allowed_exts).': ' . htmlspecialchars($file['name'], ENT_COMPAT, 'UTF-8'));
return false;
}
/*
// check filesize
if ($imagesize > $sizelimit) {
JError::raiseWarning(100, JText::_('File size is wrong').': ' . htmlspecialchars($file['name'], ENT_COMPAT, 'UTF-8'));
return false;
}
*/
// XSS check
$xss_check = JFile::read($file['tmp_name'], false, 256);
$html_tags = array('abbr', 'acronym', 'address', 'applet', 'area', 'audioscope', 'base', 'basefont', 'bdo', 'bgsound', 'big', 'blackface', 'blink', 'blockquote', 'body', 'bq', 'br', 'button', 'caption', 'center', 'cite', 'code', 'col', 'colgroup', 'comment', 'custom', 'dd', 'del', 'dfn', 'dir', 'div', 'dl', 'dt', 'em', 'embed', 'fieldset', 'fn', 'font', 'form', 'frame', 'frameset', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'head', 'hr', 'html', 'iframe', 'ilayer', 'img', 'input', 'ins', 'isindex', 'keygen', 'kbd', 'label', 'layer', 'legend', 'li', 'limittext', 'link', 'listing', 'map', 'marquee', 'menu', 'meta', 'multicol', 'nobr', 'noembed', 'noframes', 'noscript', 'nosmartquotes', 'object', 'ol', 'optgroup', 'option', 'param', 'plaintext', 'pre', 'rt', 'ruby', 's', 'samp', 'script', 'select', 'server', 'shadow', 'sidebar', 'small', 'spacer', 'span', 'strike', 'strong', 'style', 'sub', 'sup', 'table', 'tbody', 'td', 'textarea', 'tfoot', 'th', 'thead', 'title', 'tr', 'tt', 'ul', 'var', 'wbr', 'xml', 'xmp', '!DOCTYPE', '!--');
foreach($html_tags as $tag) {
// A tag is '<tagname ', so we need to add < and a space or '<tagname>'
if(stristr($xss_check, '<'.$tag.' ') || stristr($xss_check, '<'.$tag.'>')) {
JError::raiseWarning(100, JText::_('COM_ADVPORTFOLIOPRO_IE_XSS_WARNING'));
return false;
}
}
return true;
}
/**
* Process Image
*/
public static function process($image, $width, $height, $config) {
jimport('joomla.filesystem.file');
jimport('joomla.filesystem.folder');
$quality = $config->get('image_quality', 70);
$folder = str_replace('{root}', JPATH_ROOT, $config->get('image_upload_path', '{root}/images/advportfoliopro/images')) . '/';
$destFolder = str_replace('{root}', JPATH_ROOT, $config->get('image_cache_path', '{root}/cache/advportfoliopro'));
$image = $folder . ltrim($image, '/');
if (!JFile::exists($image)) {
return false;
}
if (!JFolder::exists($destFolder)) {
JFolder::create($destFolder);
}
if (!is_readable($destFolder) || !is_writable($destFolder)) {
return false;
}
// We don't want to run out of memory
@ini_set('memory_limit', '9999M');
// Get the size and MINE type of the requested image
$size = getimagesize($image);
$mime = $size['mime'];
// Make sure that the requested file is actually an image
if (substr($mime, 0, 6) != 'image/') {
return false;
}
$iWidth = $size[0];
$iHeight = $size[1];
if ($width && $height && ($iWidth > $width || $iHeight > $height)) {
$ratioComputed = $iWidth / $iHeight;
$cropRatioComputed = $width / $height;
if ($ratioComputed < $cropRatioComputed) {
// Image is too tall so we will crop the top and bottom
$oriHeight = $iHeight;
if ($iWidth < $width) {
$iHeight = $height;
} else {
$iHeight = $iWidth / $cropRatioComputed;
}
$offsetY = ($oriHeight - $iHeight) / 2;
} else if ($ratioComputed > $cropRatioComputed) {
// Image is too wide so we will crop off the left and right sides
$oriWidth = $iWidth;
if ($iHeight < $height) {
$iWidth = $width;
} else {
$iWidth = $iHeight * $cropRatioComputed;
}
$offsetX = ($oriWidth - $iWidth) / 2;
}
}
$width = $width ? $width : $iWidth;
$height = $height ? $height : $iHeight;
if ($iWidth < $width && $iHeight < $height) {
$tnWidth = $iWidth;
$tnHeight = $iHeight;
} else {
// Setting up the ratios needed for resizing. We will compare these below to determine how to
// resize the image (based on width or based on height).
$xRatio = $width / $iWidth;
$yRatio = $height / $iHeight;
if ($xRatio * $iHeight < $height) {
// Resize the image based on width
$tnHeight = ceil($xRatio * $iHeight);
$tnWidth = $width;
} else {
$tnWidth = ceil($yRatio * $iWidth);
$tnHeight = $height;
}
}
// Prepare cache name
$time = filemtime($image);
$name = str_replace('.', '_', basename($image));
$ext = strtolower(JFile::getExt($image));
$watermark = $config->get('watermark', 0);
$watermark_type = $config->get('watermark_type', 'image');
$watermark_image = $config->get('watermark_image');
$watermark_width = (int) $config->get('watermark_width');
$watermark_height = (int) $config->get('watermark_height');
$watermark_text = $config->get('watermark_text');
$watermark_font = $config->get('watermark_font', 'arial.ttf');
$watermark_font_size = (int) $config->get('watermark_font_size', 10);
$watermark_font_color = $config->get('watermark_font_color', '#000000');
$watermark_position = $config->get('watermark_position', 'bottomright');
$watermark_offset_x = (int) $config->get('watermark_offset_x');
$watermark_offset_y = (int) $config->get('watermark_offset_y');
$hash = $name . '_' . md5($image . $time . $tnWidth . $tnHeight . $quality . $watermark . $watermark_type . $watermark_image . $watermark_width . $watermark_height
. $watermark_text . $watermark_font .$watermark_font_size . $watermark_font_color . $watermark_position . $watermark_offset_x . $watermark_offset_y
);
$file = $hash . '.' . $ext;
$save = $destFolder . '/' . $file;
if (JFile::exists($save)) {
return $file;
}
// resize
if (!class_exists('GDEnhancer')) {
require_once __DIR__ . '/gdenhancer/GDEnhancer.php';
}
$image = new GDEnhancer($image);
$image->backgroundResize($tnWidth, $tnHeight, 'fill');
// watermark
if (!JFactory::getApplication()->isAdmin() && $watermark) {
$watermark_enable = false;
if ($watermark_type != 'text') {
if ($watermark_image && JFile::exists(JPATH_ROOT . '/' . $watermark_image)) {
$watermark_enable = true;
$image->layerImage(JPATH_ROOT . '/' . $watermark_image);
if ($watermark_width && $watermark_height) {
$image->layerImageResize(0, $watermark_width, $watermark_height);
}
}
} else {
if ($watermark_text) {
$watermark_enable = true;
$image->layerText($watermark_text, JPATH_ROOT . '/media/com_advportfoliopro/fonts/' . $watermark_font, $watermark_font_size, $watermark_font_color);
}
}
if ($watermark_enable) {
$image->layerMove(0, $watermark_position, $watermark_offset_x, $watermark_offset_y);
}
}
$image->saveTo($destFolder . '/' . $hash, 'default', true, $quality);
return $file;
}
}