Question

我发现了这个：http://docs.magentocommerce.com/Varien/Varien_Image/Varien_Image.html#crop

但是我不确定这是否已被弃用或者其他什么因为当我尝试这个时：

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))

它不起作用并给我这个错误：

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

crop（）方法实际上是否可用？如果是的话，我如何使用它来裁剪（不要与调整大小混淆）Magento的产品图片？谢谢！

Answer 1

你的错误是假设$this->helper('catalog/image')->init($_product, 'image')返回一个Varien_Image实例，而实际上涉及两个中间类：
Mage_Catalog_Helper_Image和Mage_Catalog_Model_Product_Image。

catalog/image帮助程序很乱，即使它在最近的版本中已经被清理了一些（例如，没有更多的私有方法）。尽管如此，一些吸气剂在没有真正需要的情况下仍然受到保护这是我的解决方法：

/* @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";

直接使用catalog/product_image模型或Varien_Image会更容易，但这样仍可应用所有Magento水印设置。
无论哪种方式都不干净我希望助手的助手在未来的版本中公之于众。

Answer 2

这是替代方法（来自Onlinebizsoft.com的学分）下面的代码首先查看/ resize目录中可用的图像，如果它不存在，则执行其余操作。

// 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;

查看网站Resize - Scale Crop images

Answer 3

您是否尝试过Varien_Image类？

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

Magento裁剪图片？

3 个答案: