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<?php
/**
* @version $Id: kunena.image.class.php 4336 2011-01-31 06:05:12Z severdia $
* Kunena Component
* @package Kunena
*
* @Copyright (C) 2011 Kunena Team. All rights reserved.
* @license http://www.gnu.org/copyleft/gpl.html GNU/GPL
* @link http://www.kunena.org
*
**/
defined('JPATH_BASE') or die;
jimport('joomla.filesystem.file');
/**
* Class to manipulate an image.
*
* Derived from JXtended JImage class Copyright (C) 2008 - 2009 JXtended, LLC. All rights reserved..
*/
class CKunenaImage
{
/**
* Scale the image to fill.
*
* @var integer
* @since 1.6
*/
const SCALE_FILL = 1;
/**
* Scale the image based on its innermost dimensions.
*
* @var integer
* @since 1.6
*/
const SCALE_INSIDE = 2;
/**
* Scale the image based on its outermost dimensions.
*
* @var integer
* @since 1.6
*/
const SCALE_OUTSIDE = 3;
/**
* The image handle.
*
* @var resource
* @since 1.6
*/
protected $_handle = null;
/**
* The source image path.
*
* @var string
* @since 1.6
*/
protected $_path = null;
/**
* The image type.
*
* @var string
* @since 1.6
*/
protected $_type = null;
/**
* List of file types supported by the server.
*
* @var array
* @since 1.6
*/
protected $_support = array('JPG'=>false, 'GIF'=>false, 'PNG'=>false);
/**
* Error message
*
* @var array
* @since 1.6
*/
protected $_error = null;
/**
* Constructor.
*
* @return void
* @since 1.6
*/
public function __construct($source = null)
{
// First we test if dependencies are met.
if (!CKunenaImageHelper::test())
{
$this->setError(JText::_('COM_KUNENA_ATTACHMENT_ERROR_UNMET_DEP'));
return false;
}
// Initialize image type
$this->_type = IMAGETYPE_JPEG;
// Determine which image types are supported by GD.
$info = gd_info();
if (!empty($info['JPG Support']) || !empty($info['JPEG Support'])) {
$this->_support['JPG'] = true;
}
if (!empty($info['GIF Create Support'])) {
$this->_support['GIF'] = true;
}
if (!empty($info['PNG Support'])) {
$this->_support['PNG'] = true;
}
// If the source input is a resource, set it as the image handle.
if ((is_resource($source) && get_resource_type($source) == 'gd')) {
$this->_handle = &$source;
}
// If the source input is not empty, assume it is a path and populate the image handle.
elseif (!empty($source) && is_string($source)) {
$this->loadFromFile($source);
}
}
function setError($errormsg){
$this->_error = $errormsg;
}
function getError(){
return $this->_error;
}
function getType(){
return $this->_type;
}
function crop($width, $height, $left, $top, $createNew = true, $scaleMethod = CKunenaImage::SCALE_INSIDE)
{
// Make sure the file handle is valid.
if ((!is_resource($this->_handle) || get_resource_type($this->_handle) != 'gd'))
{
$this->setError(JText::_('COM_KUNENA_ATTACHMENT_ERROR_INVALID_FILE_HANDLE'));
return false;
}
// Sanitize width.
$width = ($width === null) ? $height : $width;
if (preg_match('/^[0-9]+(\.[0-9]+)?\%$/', $width)) {
$width = intval(round($this->getWidth() * floatval(str_replace('%', '', $width)) / 100));
}
else {
$width = intval(round(floatval($width)));
}
// Sanitize height.
$height = ($height === null) ? $width : $height;
if (preg_match('/^[0-9]+(\.[0-9]+)?\%$/', $height)) {
$height = intval(round($this->getHeight() * floatval(str_replace('%', '', $height)) / 100));
}
else {
$height = intval(round(floatval($height)));
}
// Sanitize left.
$left = intval(round(floatval($left)));
// Sanitize top.
$top = intval(round(floatval($top)));
// Create the new truecolor image handle.
$handle = imagecreatetruecolor($width, $height);
// Allow transparency for the new image handle.
imagealphablending($handle, true);
imagesavealpha($handle, true);
if ($this->isTransparent())
{
// Get the transparent color values for the current image.
$rgba = imageColorsForIndex($this->_handle, imagecolortransparent($this->_handle));
$color = imageColorAllocate($this->_handle, $rgba['red'], $rgba['green'], $rgba['blue']);
// Set the transparent color values for the new image.
imagecolortransparent($handle, $color);
imagefill($handle, 0, 0, $color);
imagecopyresized(
$handle,
$this->_handle,
0, 0,
$left,
$top,
$width,
$height,
$width,
$height
);
}
else
{
imagecopyresampled(
$handle,
$this->_handle,
0, 0,
$left,
$top,
$width,
$height,
$width,
$height
);
}
// If we are cropping to a new image, create a new CKunenaImage object.
if ($createNew)
{
// Create the new CKunenaImage object for the new truecolor image handle.
$new = new CKunenaImage($handle);
return $new;
}
else
{
// Swap out the current handle for the new image handle.
$this->_handle = &$handle;
return true;
}
}
function filter($type)
{
// Initialize variables.
$name = preg_replace('#[^A-Z0-9_]#i', '', $type);
$className = 'CKunenaImageFilter_'.ucfirst($name);
if (!class_exists($className))
{
jimport('joomla.filesystem.path');
$path = JPath::find(CKunenaImageFilter::addIncludePath(), strtolower($name).'.php');
if ($path)
{
require_once $path;
if (!class_exists($className))
{
$this->setError($className.' not found in file.');
return false;
}
}
else
{
$this->setError($className.' not supported. File not found.');
return false;
}
}
$instance = new $className;
if (is_callable(array($instance, 'execute')))
{
// Setup the arguments to call the filter execute method.
$args = func_get_args();
array_shift($args);
array_unshift($args, $this->_handle);
// Call the filter execute method.
$return = call_user_func_array(array($instance, 'execute'), $args);
// If the filter failed, proxy the error and return false.
if (!$return)
{
$this->setError($instance->getError());
return false;
}
return true;
}
else
{
$this->setError($className.' not valid.');
return false;
}
}
function getHeight()
{
return imagesy($this->_handle);
}
function getWidth()
{
return imagesx($this->_handle);
}
function isTransparent()
{
// Make sure the file handle is valid.
if ((!is_resource($this->_handle) || get_resource_type($this->_handle) != 'gd'))
{
$this->setError(JText::_('COM_KUNENA_ATTACHMENT_ERROR_INVALID_FILE_HANDLE'));
return false;
}
return (imagecolortransparent($this->_handle) >= 0);
}
function loadFromFile($path)
{
// Make sure the file exists.
if (!JFile::exists($path))
{
$this->setError(JText::_('COM_KUNENA_ATTACHMENT_ERROR_FILE_DONOT_EXIST'));
return false;
}
// Get the image properties.
$properties = CKunenaImageHelper::getProperties($path);
if (!$properties) {
return false;
}
// Attempt to load the image based on the MIME-Type
switch ($properties->get('mime'))
{
case 'image/gif':
// Make sure the image type is supported.
if (empty($this->_support['GIF']))
{
$this->setError(JText::_('COM_KUNENA_ATTACHMENT_ERROR_FILETYPE_NOT_SUPPORTED'));
return false;
}
$this->_type = IMAGETYPE_GIF;
// Attempt to create the image handle.
$handle = @imagecreatefromgif($path);
if (!is_resource($handle))
{
$this->setError(JText::_('COM_KUNENA_ATTACHMENT_ERROR_UNABLE_PROCESS_IMAGE'));
return false;
}
$this->_handle = &$handle;
break;
case 'image/jpeg':
// Make sure the image type is supported.
if (empty($this->_support['JPG']))
{
$this->setError(JText::_('COM_KUNENA_ATTACHMENT_ERROR_FILETYPE_NOT_SUPPORTED'));
return false;
}
$this->_type = IMAGETYPE_JPEG;
// Attempt to create the image handle.
$handle = @imagecreatefromjpeg($path);
if (!is_resource($handle))
{
$this->setError(JText::_('COM_KUNENA_ATTACHMENT_ERROR_UNABLE_PROCESS_IMAGE'));
return false;
}
$this->_handle = &$handle;
break;
case 'image/png':
// Make sure the image type is supported.
if (empty($this->_support['PNG']))
{
$this->setError(JText::_('COM_KUNENA_ATTACHMENT_ERROR_FILETYPE_NOT_SUPPORTED'));
return false;
}
$this->_type = IMAGETYPE_PNG;
// Attempt to create the image handle.
$handle = @imagecreatefrompng($path);
if (!is_resource($handle))
{
$this->setError(JText::_('COM_KUNENA_ATTACHMENT_ERROR_UNABLE_PROCESS_IMAGE'));
return false;
}
$this->_handle = &$handle;
break;
default:
$this->setError(JText::_('COM_KUNENA_ATTACHMENT_ERROR_FILETYPE_NOT_SUPPORTED'));
return false;
break;
}
// Set the filesystem path to the source image.
$this->_path = $path;
return true;
}
function resize($width, $height, $createNew = true, $scaleMethod = CKunenaImage::SCALE_INSIDE)
{
// Make sure the file handle is valid.
if ((!is_resource($this->_handle) || get_resource_type($this->_handle) != 'gd'))
{
$this->setError(JText::_('COM_KUNENA_ATTACHMENT_ERROR_INVALID_FILE_HANDLE'));
return false;
}
// Prepare the dimensions for the resize operation.
$dimensions = $this->_prepareDimensions($width, $height, $scaleMethod);
if (empty($dimensions)) {
return false;
}
// Create the new truecolor image handle.
$handle = imagecreatetruecolor($dimensions['width'], $dimensions['height']);
// Allow transparency for the new image handle.
imagealphablending($handle, false);
imagesavealpha($handle, true);
if (($this->_type == IMAGETYPE_GIF) || ($this->_type == IMAGETYPE_PNG)) {
$trnprt_indx = imagecolortransparent ( $this->_handle );
// If we have a specific transparent color
if ($trnprt_indx >= 0) {
// Get the original image's transparent color's RGB values
// FIXME: Warning: imagecolorsforindex() [function.imagecolorsforindex]: Color index 255 out of range
$trnprt_color = @imagecolorsforindex ( $this->_handle, $trnprt_indx );
// Allocate the same color in the new image resource
$trnprt_indx = imagecolorallocate ( $handle, $trnprt_color ['red'], $trnprt_color ['green'], $trnprt_color ['blue'] );
// Completely fill the background of the new image with allocated color.
imagefill ( $handle, 0, 0, $trnprt_indx );
// Set the background color for new image to transparent
imagecolortransparent ( $handle, $trnprt_indx );
} // Always make a transparent background color for PNGs that don't have one allocated already
elseif ($this->_type == IMAGETYPE_PNG) {
// Turn off transparency blending (temporarily)
imagealphablending ( $handle, false );
// Create a new transparent color for image
$color = imagecolorallocatealpha ( $handle, 0, 0, 0, 127 );
// Completely fill the background of the new image with allocated color.
imagefill ( $handle, 0, 0, $color );
// Restore transparency blending
imagesavealpha ( $handle, true );
}
}
imagecopyresampled(
$handle,
$this->_handle,
0, 0, 0, 0,
$dimensions['width'],
$dimensions['height'],
$this->getWidth(),
$this->getHeight()
);
// If we are resizing to a new image, create a new CKunenaImage object.
if ($createNew)
{
// Create the new CKunenaImage object for the new truecolor image handle.
$new = new CKunenaImage($handle);
$new->_type = $this->_type;
return $new;
}
else
{
// Swap out the current handle for the new image handle.
$this->_handle = & $handle;
return true;
}
}
function toFile($path, $type = null, $options=array())
{
if (!$type) $type = $this->_type;
switch ($type)
{
case IMAGETYPE_GIF:
imagegif($this->_handle, $path);
break;
case IMAGETYPE_PNG:
imagepng($this->_handle, $path, (array_key_exists('quality', $options)) ? intval(($options['quality']-1)/10) : 6);
break;
case IMAGETYPE_JPEG:
default:
imagejpeg($this->_handle, $path, (array_key_exists('quality', $options)) ? $options['quality'] : 60);
break;
}
}
function _prepareDimensions($width, $height, $scaleMethod)
{
// Sanitize width.
$width = ($width === null) ? $height : $width;
if (preg_match('/^[0-9]+(\.[0-9]+)?\%$/', $width)) {
$width = intval(round($this->getWidth() * floatval(str_replace('%', '', $width)) / 100));
}
else {
$width = intval(round(floatval($width)));
}
// Sanitize height.
$height = ($height === null) ? $width : $height;
if (preg_match('/^[0-9]+(\.[0-9]+)?\%$/', $height)) {
$height = intval(round($this->getHeight() * floatval(str_replace('%', '', $height)) / 100));
}
else {
$height = intval(round(floatval($height)));
}
$dimensions = array();
if ($scaleMethod == CKunenaImage::SCALE_FILL)
{
$dimensions['width'] = $width;
$dimensions['height'] = $height;
}
elseif ($scaleMethod == CKunenaImage::SCALE_INSIDE || $scaleMethod == CKunenaImage::SCALE_OUTSIDE)
{
$rx = $this->getWidth() / $width;
$ry = $this->getHeight() / $height;
if ($scaleMethod == CKunenaImage::SCALE_INSIDE) {
$ratio = ($rx > $ry) ? $rx : $ry;
}
else {
$ratio = ($rx < $ry) ? $rx : $ry;
}
if ($ratio < 1) $ratio = 1;
$dimensions['width'] = round($this->getWidth() / $ratio);
$dimensions['height'] = round($this->getHeight() / $ratio);
}
else
{
$this->setError(JText::_('COM_KUNENA_ATTACHMENT_ERROR_INVALID_FIT'));
return false;
}
return $dimensions;
}
}
class CKunenaImageFilter
{
/**
* Add a directory where CKunenaImage should search for filters. You may
* either pass a string or an array of directories.
*
* @access public
* @param string A path to search.
* @return array An array with directory elements
* @since 1.0
*/
function addIncludePath($path='')
{
static $paths=null;
if (!isset($paths)) {
$paths = array(dirname(__FILE__).'/image');
}
// force path to array
settype($path, 'array');
// loop through the path directories
foreach ($path as $dir)
{
if (!empty($dir) && !in_array($dir, $paths)) {
array_unshift($paths, JPath::clean( $dir ));
}
}
return $paths;
}
function execute()
{
$this->setError(JText::_('COM_KUNENA_ATTACHMENT_ERROR_METHOD_NOT_IMPLEMENTED'));
return false;
}
}
class CKunenaImageHelper
{
public static function getProperties($path)
{
// Initialize the path variable.
if (empty($path)) return false;
// Make sure the file exists.
if (!JFile::exists($path))
{
$e = new JException(JText::_('COM_KUNENA_ATTACHMENT_ERROR_FILE_DONOT_EXIST'));
return false;
}
// Get the image file information.
$info = @getimagesize($path);
if (!$info)
{
$e = new JException(JText::_('COM_KUNENA_ATTACHMENT_ERROR_UNABLE_TO_GET_IMAGESIZE'));
return false;
}
// Build the response object.
$result = new JObject;
$result->set('width', $info[0]);
$result->set('height', $info[1]);
$result->set('type', $info[2]);
$result->set('attributes', $info[3]);
$result->set('bits', @$info['bits']);
$result->set('channels', @$info['channels']);
$result->set('mime', $info['mime']);
return $result;
}
function version($file, $newpath, $newfile, $maxwidth = 800, $maxheight = 800, $quality = 70, $scale = CKunenaImage::SCALE_INSIDE) {
require_once(KUNENA_PATH_LIB.DS.'kunena.file.class.php');
// create upload directory if it does not exist
$imageinfo = self::getProperties($file);
if (!$imageinfo) return false;
if (!CKunenaFolder::exists($newpath)) {
if (!CKunenaFolder::create($newpath)) {
return false;
}
}
CKunenaFolder::createIndex($newpath);
if ($imageinfo->width > $maxwidth || $imageinfo->height > $maxheight) {
$image = new CKunenaImage($file);
if ($image->getError()) {
return false;
}
if ($quality < 1 || $quality > 100) $quality = 70;
$options = array('quality' => $quality);
$image = $image->resize($maxwidth, $maxheight, true, $scale);
$type = $image->getType();
$temp = CKunenaPath::tmpdir() . DS . 'kunena_' . md5 ( rand() );
$image->toFile($temp, $type, $options);
unset ($image);
if (! CKunenaFile::move ( $temp, $newpath.'/'.$newfile )) {
unlink ($temp);
return false;
}
} else {
if (! CKunenaFile::copy ( $file, $newpath.'/'.$newfile )) {
return false;
}
}
return true;
}
public static function test()
{
return (function_exists('gd_info') && function_exists('imagecreatetruecolor'));
}
}
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