/**
* Resizes image to desired width and height, returns true on success.
*
* @param string $sSrc Source of image file
* @param string $sTarget Target to write resized image file
* @param mixed $iDesiredWidth Width of resized image
* @param mixed $iDesiredHeight Height of resized image
*
* @return bool
*/
public function resizeImage($sSrc, $sTarget, $iDesiredWidth, $iDesiredHeight)
{
// use this GD Version
if (($iUseGDVersion = getGdVersion()) && function_exists('imagecreate') && file_exists($sSrc) && ($aImageInfo = @getimagesize($sSrc))) {
$myConfig = $this->getConfig();
list($iWidth, $iHeight) = calcImageSize($iDesiredWidth, $iDesiredHeight, $aImageInfo[0], $aImageInfo[1]);
return $this->_resize($aImageInfo, $sSrc, null, $sTarget, $iWidth, $iHeight, $iUseGDVersion, $myConfig->getConfigParam('blDisableTouch'), $myConfig->getConfigParam('sDefaultImageQuality'));
}
return false;
}
/**
* Generates requested image
*
* @param string $sImageSource image source
* @param string $sImageTarget image target
*
* @return string
*/
protected function _generateImage($sImageSource, $sImageTarget)
{
$sPath = false;
if (getGdVersion() !== false && $this->_isTargetPathValid($sImageTarget) && ($sImageType = $this->_getImageType())) {
// including generator files
includeImageUtils();
// in case lock file creation failed should check if another process did not created image yet
if ($this->_lock($sImageTarget)) {
// extracting image info - size/quality
list($iWidth, $iHeight, $iQuality) = $this->_getImageInfo();
switch ($sImageType) {
case "png":
$sPath = $this->_generatePng($sImageSource, $sImageTarget, $iWidth, $iHeight);
break;
case "jpeg":
$sPath = $this->_generateJpg($sImageSource, $sImageTarget, $iWidth, $iHeight, $iQuality);
break;
case "gif":
$sPath = $this->_generateGif($sImageSource, $sImageTarget, $iWidth, $iHeight);
break;
}
// releasing..
if ($sPath) {
$this->_unlock($sImageTarget);
}
} else {
// assuming that image was created by another process
$sPath = file_exists($sImageTarget) ? $sImageTarget : false;
}
}
return $sPath;
}
/**
* Return true, if the version of the gd library is correct
*
* @return bool
*/
protected function validateGdVersion()
{
return getGdVersion() !== false;
}