Magento 2: How to get resize image for Custom Module?

Question

I'm using Magento 2 CE Version 2.1.0

I have Custom Module with Image Field. When it's uploaded, i want different size images as for product we have Thumbnail Image, List Image & Product Detail Page Image.

Able to upload 1 image without resize.

I'm using below code for resizing image, but it's giving product image URL. Not my custom module.

\app\code\Custom\Module\Block\MyPosts\Edit.php

public function getImage($posts, $image) {
    $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
    $_imagehelper = $objectManager->get('Magento\Catalog\Helper\Image');
    echo $postImage = $_imagehelper->init($posts, $image)->constrainOnly(FALSE)->keepAspectRatio(TRUE)->keepFrame(FALSE)->resize(400)->getUrl();
    exit;
}

It gives below URL http://localhost/magento2/pub/static/frontend/Magento/luma/en_US/Magento_Catalog/images/product/placeholder/.jpg

My image is stored here: \magento2\pub\media\custom_module\posts\image.

How can i get resize image with this path & how can i save/retrieve different size image?

Answer 1

You can check in details by click, Resize Custom Image in Magento 2

Inside Block file keep below code,

   protected $_filesystem ;
   protected $_imageFactory;
   public function __construct(            
        \Magento\Framework\Filesystem $filesystem,         
        \Magento\Framework\Image\AdapterFactory $imageFactory         
        ) {         
        $this->_filesystem = $filesystem;               
        $this->_imageFactory = $imageFactory;         
        }

    // pass imagename, width and height
    public function resize($image, $width = null, $height = null)
    {
        $absolutePath = $this->_filesystem->getDirectoryRead(\Magento\Framework\App\Filesystem\DirectoryList::MEDIA)->getAbsolutePath('custom_module/posts/').$image;
        if (!file_exists($absolutePath)) return false;
        $imageResized = $this->_filesystem->getDirectoryRead(\Magento\Framework\App\Filesystem\DirectoryList::MEDIA)->getAbsolutePath('resized/'.$width.'/').$image;
        if (!file_exists($imageResized)) { // Only resize image if not already exists.
            //create image factory...
            $imageResize = $this->_imageFactory->create();         
            $imageResize->open($absolutePath);
            $imageResize->constrainOnly(TRUE);         
            $imageResize->keepTransparency(TRUE);         
            $imageResize->keepFrame(FALSE);         
            $imageResize->keepAspectRatio(TRUE);         
            $imageResize->resize($width,$height);  
            //destination folder                
            $destination = $imageResized ;    
            //save image      
            $imageResize->save($destination);         
        } 
        $resizedURL = $this->_storeManager->getStore()->getBaseUrl(\Magento\Framework\UrlInterface::URL_TYPE_MEDIA).'resized/'.$width.'/'.$image;
        return $resizedURL;
  } 

Now Call inside phtml file,

$block->resize('test.jpg',500,400);

Answer 2

The accepted answer doesn’t consider caching the image to improve performance. You don’t need to resize and overwrite the image every time it’s requested. The following approach saves the resized image to a "cache" folder so successive calls return the image from the cache. The method is contained on a helper (not a block) so you can call it from any template you like:

app/code/Vendor/Namespace/Helper/Image.php

<?php

namespace Vendor\Namespace\Helper;

use Magento\Framework\App\Filesystem\DirectoryList;

class Image extends \Magento\Framework\App\Helper\AbstractHelper
{
    /**
     * Custom directory relative to the "media" folder
     */
    const DIRECTORY = 'custom_module/posts';

    /**
     * @var \Magento\Framework\Filesystem\Directory\WriteInterface
     */
    protected $_mediaDirectory;

    /**
     * @var \Magento\Framework\Image\Factory
     */
    protected $_imageFactory;

    /**
     * Store manager
     *
     * @var \Magento\Store\Model\StoreManagerInterface
     */
    protected $_storeManager;

    /**
     * @param \Magento\Framework\App\Helper\Context $context
     * @param \Magento\Framework\Filesystem $filesystem
     * @param \Magento\Framework\Image\Factory $imageFactory
     * @param \Magento\Store\Model\StoreManagerInterface $storeManager
     */
    public function __construct(
        \Magento\Framework\App\Helper\Context $context,
        \Magento\Framework\Filesystem $filesystem,
        \Magento\Framework\Image\AdapterFactory $imageFactory,
        \Magento\Store\Model\StoreManagerInterface $storeManager
    ) {
        $this->_mediaDirectory = $filesystem->getDirectoryWrite(DirectoryList::MEDIA);
        $this->_imageFactory = $imageFactory;
        $this->_storeManager = $storeManager;
        parent::__construct($context);
    }

    /**
     * First check this file on FS
     *
     * @param string $filename
     * @return bool
     */
    protected function _fileExists($filename)
    {
        if ($this->_mediaDirectory->isFile($filename)) {
            return true;
        }
        return false;
    }

    /**
     * Resize image
     * @return string
     */
    public function resize($image, $width = null, $height = null)
    {
        $mediaFolder = self::DIRECTORY;

        $path = $mediaFolder . '/cache';
        if ($width !== null) {
            $path .= '/' . $width . 'x';
            if ($height !== null) {
                $path .= $height ;
            }
        }

        $absolutePath = $this->_mediaDirectory->getAbsolutePath($mediaFolder) . $image;
        $imageResized = $this->_mediaDirectory->getAbsolutePath($path) . $image;

        if (!$this->_fileExists($path . $image)) {
            $imageFactory = $this->_imageFactory->create();
            $imageFactory->open($absolutePath);
            $imageFactory->constrainOnly(true);
            $imageFactory->keepTransparency(true);
            $imageFactory->keepFrame(true);
            $imageFactory->keepAspectRatio(true);
            $imageFactory->resize($width, $height);
            $imageFactory->save($imageResized);
        }

        return $this->_storeManager->getStore()->getBaseUrl(\Magento\Framework\UrlInterface::URL_TYPE_MEDIA) . $path . $image;
    }
}

Now from any .phtml template you can call the method like this:

<!-- Get a reference to the Image helper -->
<?php $image = $this->helper('Vendor\Namespace\Helper\Image'); ?>
.
.
.
<!-- Resize the image by specifying width only -->
<img src="<?php echo $image->resize('/my-picture.jpg', 1200); ?>">

<!-- Resize the image by specifying width and height -->
<img src="<?php echo $image->resize('/my-picture.jpg', 640, 480); ?>">

Answer 3

I'm afraid you don't need to create new classes for resizing your images, since Magento helpers already have it (see \Magento\Catalog\Helper\Image::resize).

So, you can just do:

$_imageHelper = \Magento\Framework\App\ObjectManager::getInstance()->get('Magento\Catalog\Helper\Image');

echo $_imageHelper->init($product, 'small_image', ['type'=>'small_image'])->keepAspectRatio(true)->resize('65','65')->getUrl();

You can also see an example of this usage at \Magento\VisualMerchandiser\Block\Adminhtml\Category\Merchandiser\Tile::getImageUrl (Magento EE only I guess)

Answer 4

I've encountered an issue where the resize method wouldn't crop the image to my dimensions so you need to calculate the crop values from top and bottom or left and right, depending on your original image size. I used the code from @Rakesh and modified it so it checks whether the original image is taller or wider and crops accordingly:

public function resize($image, $width = null, $height = null)
{
    $mediaFolder = self::DIRECTORY;

    $path = $mediaFolder . 'cache';
    if ($width !== null) {
        $path .= '/' . $width . 'x';
        if ($height !== null) {
            $path .= $height ;
        }
    }

    $absolutePath = $this->_mediaDirectory->getAbsolutePath($mediaFolder) . $image;
    $imageResized = $this->_mediaDirectory->getAbsolutePath($path) . $image;

    if (!$this->_fileExists($path . $image) && $this->_fileExists($mediaFolder . $image)) {
        $imageFactory = $this->_imageFactory->create();
        $imageFactory->open($absolutePath);
        $imageFactory->constrainOnly(true);
        $imageFactory->keepAspectRatio(true);
        $imageFactory->keepFrame(false);

        $originalWidth = $imageFactory->getOriginalWidth();
        $originalHeight = $imageFactory->getOriginalHeight();

        $oldAspectRatio = $originalWidth / $originalHeight;
        $newAspectRatio = $width / $height;

        if ($oldAspectRatio > $newAspectRatio) {
            // original image is wider than the desired dimensions
            $imageFactory->resize(null, $height);
            $crop = ($imageFactory->getOriginalWidth() - $width) / 2;
            $imageFactory->crop(0, $crop, $crop, 0);
        } else {
            // it's taller...
            $imageFactory->resize($width, null);
            $crop = ($imageFactory->getOriginalHeight() - $height) / 2;
            $imageFactory->crop($crop, 0, 0, $crop);
        }

        $imageFactory->save($imageResized);

    }

    return $this->_storeManager
            ->getStore()
            ->getBaseUrl(\Magento\Framework\UrlInterface::URL_TYPE_MEDIA) . $path . $image;
}

Answer 5

@Rakesh -- I have done same but it is not working for me there is an error

Blockquote Error filtering template: Warning: getimagesize(/var/www/html/sitename/pub/media/onecategory/6/7/671471390.jpg): failed to open stream: No such file or directory in /var/www/html/sitename/vendor/magento/framework/Image/Adapter/AbstractAdapter.php on line 304

can you help me in this.

Thank you.