Magento crop image?

Question

I found this: http://docs.magentocommerce.com/Varien/Varien_Image/Varien_Image.html#crop

But I'm not sure if this is deprecated or something because when I tried this:

echo rawurlencode($this->helper('catalog/image')->init($_product, 'image')->constrainOnly(TRUE)->keepAspectRatio(TRUE)->keepFrame(FALSE)->setWatermarkImageOpacity(0)->crop(10, 20, 30, 40)->resize(300, null))

It doesn't work and gives me this error:

Fatal error:  Call to undefined method Mage_Catalog_Helper_Image::crop() in /home/xxxxx/public_html/app/design/frontend/default/xxxxx/template/catalog/product/view.phtml

So is the crop() method actually usable at all? If it is, how can I use it to crop (not to be confused with resize) the product images of Magento? Thanks!

Answer 1

Here is the alternative method ( credits from Onlinebizsoft.com ) The following code first looking the image that available in the /resize directory, if it's not there, doing rest of things.

// actual path of image
$_imageUrl = Mage::getBaseDir('media').DS."myimage".DS.$post->getThumbnail();

// path of the resized image to be saved
// here, the resized image is saved in media/resized folder
$imageResized =  Mage::getBaseDir('media').DS."myimage".DS."resized".DS.$post->getThumbnail();

// 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(135, 135);
    $imageObj->save($imageResized);
endif;

Check the website Resize - Scale Crop images

Answer 2

Your mistake is assuming that $this->helper('catalog/image')->init($_product, 'image') returns a Varien_Image instance, when in fact there are two intermediate classes involved:
Mage_Catalog_Helper_Image and Mage_Catalog_Model_Product_Image.

The catalog/image helper is a mess, even though it has been cleaned up a bit in recent versions (e.g. no more private methods). Still, some getters still are protected without there being a real need for it.
Here is my workaround:

/* @var $imageHelper Mage_Catalog_Helper_Image */
// Initialize the image helper
$imageHelper = Mage::helper('catalog/image')->init($_product, 'image')
        ->constrainOnly(true)
        ->keepAspectRatio(true)
        ->keepFrame(false)
        ->setWatermarkImageOpacity(0);

// Get the catalog/product_image instance
/* @var $imageModel Mage_Catalog_Model_Product_Image */
$reflection = new ReflectionClass($imageHelper);
$property = $reflection->getProperty('_model');
$property->setAccessible(true);
$imageModel = $property->getValue($imageHelper);

// Initialize the missing values on the image model
// Usually done in Mage_Catalog_Helper_Image::__toString()
if (! $imageModel->isCached())
{
    $getWatermarkMethod = $reflection->getMethod('getWatermark');
    $getWatermarkMethod->setAccessible(true);
    $imageModel->setBaseFile($_product->getImage())
        ->resize()
        ->setWatermark($getWatermarkMethod->invoke($imageHelper));

    // Crop the image using the image processor
    // $imageModel->getImageProcessor() returns a Varien_Image instance
    $imageModel->getImageProcessor()->crop(10, 20, 30, 40);

    // Generate the image according to the set parameters and
    // get the URL while bypassing the helper to avoid reinitialization
    $url = $imageModel->saveFile()->getUrl();
}
echo $url . "\n";

It would be easier to use the catalog/product_image model or Varien_Image directly, but this way all the Magento watermark settings still are applied.
Either way isn't clean.
I hope the getters on the helper are made public in future releases.

Answer 3

Did you tried Varien_Image class ?

$image = new Varien_Image($img);
$cropped = $image->crop();