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根据已经存在的图片地址，生成自定义尺寸的图片。。

处理图片的类是：lib/Varien/Image.php。

 

 

 public function getThumbnailResize($width, $height = null) {

        // actual path of image         $imageUrl = Mage::getBaseDir('media').DS.$this->getData("thumbnail");                 // path of the resized image to be saved         // here, the resized image is saved in media/resized folder         $imageResized = Mage::getBaseDir('media').DS."resized_".$this->getData("thumbnail");                 // resize image only if the image file exists and the resized image file doesn't exist         // the image is resized proportionally with the width/height 135px         if (!file_exists($imageResized)&&file_exists($imageUrl)) {             $imageObj = new Varien_Image($imageUrl);             $imageObj->constrainOnly(TRUE);             $imageObj->keepAspectRatio(TRUE);             $imageObj->keepFrame(FALSE);

           $imageObj->resize($width, $height);

            $imageObj->save($imageResized);         }         return (Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_WEB) . "media/" . "resized_".$this->getData("thumbnail"));     }

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