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Symfony2 Bundle to assist in imagine manipulation using the imagine library

liip.ch
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LiipImagineBundle

This bundle is a fork of AvalancheImagineBundle which provides easy image manipulation support for Symfony2. The goal of the fork is to make the code more extensible and as a result applicable for more use cases.

For more details on the reason for the fork see: avalanche123/AvalancheImagineBundle#25

For example with this bundle the following is possible:

<img src="{{ '/relative/path/to/image.jpg' | imagine_filter('thumbnail') }}" />

This will perform the transformation called thumbnail, which you can define to do a number of different things, such as resizing, cropping, drawing, masking, etc.

This bundle integrates the standalone PHP "Imagine library".

Build Status

Installation

To install this bundle, you'll need both the Imagine library and this bundle. Installation depends on how your project is setup:

Step 1: Installation

Add the following lines to your deps file

[Imagine]
    git=http://github.com/avalanche123/Imagine.git
    target=imagine
    version=v0.2.0

[LiipImagineBundle]
    git=http://github.com/liip/LiipImagineBundle.git
    target=bundles/Liip/ImagineBundle

Next, update your vendors by running:

$ ./bin/vendors install

Step 2: Configure the autoloader

Add the following entries to your autoloader:

<?php
// app/autoload.php

$loader->registerNamespaces(array(
    // ...

    'Imagine'   => __DIR__.'/../vendor/imagine/lib',
    'Liip'      => __DIR__.'/../vendor/bundles',
));

Step 3: Enable the bundle

Finally, enable the bundle in the kernel:

<?php
// app/AppKernel.php

public function registerBundles()
{
    $bundles = array(
        // ...

        new Liip\ImagineBundle\LiipImagineBundle(),
    );
}

Step 4: Register the bundle's routes

Finally, add the following to your routing file:

# app/config/routing.yml

_imagine:
    resource: .
    type:     imagine

Congratulations! You're ready to rock your images!

Basic Usage

This bundle works by configuring a set of filters and then applying those filters to images inside a template So, start by creating some sort of filter that you need to apply somewhere in your application. For example, suppose you want to thumbnail an image to a size of 120x90 pixels:

# app/config/config.yml

liip_imagine:
    filter_sets:
        my_thumb:
            quality: 75
            filters:
                thumbnail: { size: [120, 90], mode: outbound }

You've now defined a filter set called my_thumb that performs a thumbnail transformation. We'll learn more about available transformations later, but for now, this new filter can be used immediately in a template:

<img src="{{ '/relative/path/to/image.jpg' | imagine_filter('my_thumb') }}" />

Or if you're using PHP templates:

<img src="<?php $this['imagine']->filter('/relative/path/to/image.jpg', 'my_thumb') ?>" />

Behind the scenes, the bundles applies the filter(s) to the image on the first request and then caches the image to a similar path. On the next request, the cached image would be served directly from the file system.

In this example, the final rendered path would be something like /media/cache/my_thumb/relative/path/to/image.jpg. This is where Imagine would save the filtered image file.

In order to get an absolute path to the image add another parameter with the value true:

<img src="{{ '/relative/path/to/image.jpg' | imagine_filter('my_thumb', true) }}" />

Or if you're using PHP templates:

<img src="<?php $this['imagine']->filter('/relative/path/to/image.jpg', 'my_thumb', true) ?>" />

Note: Using the dev environment you might find that the images are not properly rendered when using the template helper. This is likely caused by having intercept_redirect enabled in your application configuration. To ensure that the images are rendered disable this option:

web_profiler:
    intercept_redirects: false

Configuration

The default configuration for the bundle looks like this:

liip_imagine:
    driver:               gd
    web_root:             %kernel.root_dir%/../web
    data_root:            %liip_imagine.web_root%
    cache_prefix:         /media/cache
    cache:                web_path
    cache_clearer:        true
    data_loader:          filesystem
    controller_action:    liip_imagine.controller:filterAction
    formats:              []
    filter_sets:

        # Prototype
        name:
            path:                 ~
            quality:              100
            format:               ~
            cache:                ~
            data_loader:          ~
            controller_action:    ~
            filters:

                # Prototype
                name:                 []

There are several configuration options available:

  • web_root - must be the absolute path to you application's web root. This is used to determine where to put generated image files, so that apache will pick them up before handing the request to Symfony2 next time they are requested.

    default: %kernel.root_dir%/../web

  • data_root - the absolute path to the location that original files should be sourced from. This option only changes the standard filesystem loader.

    default: %kernel.root_dir%/../web

  • cache_prefix - this is also used in the path for image generation, so as to not clutter your web root with cached images. For example by default, the images would be written to the web/media/cache/ directory.

    default: /media/cache

  • cache - default cache resolver

    default: web_path (which means the standard web_path resolver is used)

  • cache_clearer - Whether or not to clear the image cache when the kernel.cache_clearer event occurs. This option doesn't have any effect in symfony < 2.1

    default: true

  • data_loader - name of a custom data loader

    default: filesystem (which means the standard filesystem loader is used)

  • controller_action - name of the controller action to use in the route loader

    default: liip_imagine.controller:filterAction

  • driver - one of the three drivers: gd, imagick, gmagick

    default: gd

  • formats - optional list of image formats to which images may be converted to.

  • filter_sets - specify the filter sets that you want to define and use

Each filter set that you specify has the following options:

  • filters - determine the type of filter to be used (refer to Filters section for more information) and options that should be passed to the specific filter type
  • path - used in place of the filter name to determine the path in combination with the global cache_prefix
  • quality - override the default quality of 100 for the generated images
  • cache - override the default cache setting
  • data_loader - override the default data loader
  • controller_action - override the default controller action
  • format - hardcodes the output format (aka the requested format is ignored)

Built-in Filters

The thumbnail filter

The thumbnail filter, as the name implies, performs a thumbnail transformation on your image. Configuration looks like this:

liip_imagine:
    filter_sets:
        my_thumb:
            filters:
                thumbnail: { size: [120, 90], mode: outbound }

The mode can be either outbound or inset. There is also a option allow_upscale (default: false).

The relative_resize filter

The relative_resize filter may be used to heighten, widen, increase or scale an image with respect to its existing dimensions. These options directly correspond to methods on Imagine's BoxInterface.

Given an input image sized 50x40 (width, height), consider the following annotated configuration examples:

liip_imagine:
    filter_sets:
        my_heighten:
            filters:
                relative_resize: { heighten: 60 } # Transforms 50x40 to 75x60
        my_widen:
            filters:
                relative_resize: { widen: 32 }    # Transforms 50x40 to 32x26
        my_increase:
            filters:
                relative_resize: { increase: 10 } # Transforms 50x40 to 60x50
        my_widen:
            filters:
                relative_resize: { scale: 2.5 }   # Transforms 50x40 to 125x100

The crop filter

The crop filter, as the name implies, performs a crop transformation on your image. Configuration looks like this:

liip_imagine:
    filter_sets:
        my_thumb:
            filters:
                crop: { start: [10, 20], size: [120, 90] }

Load your Custom Filters

The ImagineBundle allows you to load your own custom filter classes. The only requirement is that each filter loader implement the following interface:

Liip\ImagineBundle\Imagine\Filter\Loader\LoaderInterface

To tell the bundle about your new filter loader, register it in the service container and apply the liip_imagine.filter.loader tag to it (example here in XML):

<service id="liip_imagine.filter.loader.my_custom_filter" class="Acme\ImagineBundle\Imagine\Filter\Loader\MyCustomFilterLoader">
    <tag name="liip_imagine.filter.loader" loader="my_custom_filter" />
</service>

For more information on the service container, see the Symfony2 Service Container documentation.

You can now reference and use your custom filter when defining filter sets you'd like to apply in your configuration:

liip_imagine:
    filter_sets:
        my_special_style:
            filters:
                my_custom_filter: { }

For an example of a filter loader implementation, refer to Liip\ImagineBundle\Imagine\Filter\Loader\ThumbnailFilterLoader.

Using the controller as a service

If you need to use the filters in a controller, you can just load ImagineController.php controller as a service and handle the response:

class MyController extends Controller {

    public function indexAction() {
        // RedirectResponse object
        $imagemanagerResponse = $this->container
            ->get('liip_imagine.controller')
                ->filterAction(
                    $this->getRequest(),
                    'uploads/foo.jpg',      // original image you want to apply a filter to
                    'my_thumb'              // filter defined in config.yml
        );

        // string to put directly in the "src" of the tag <img>
        $srcPath = $imagemanagerResponse->headers->get('location');
    }

}

In case you need to add more logic the recommended solution is to either extend ImagineController.php controller or take the code from that controller as a basis for your own controller.

Outside the web root

When your setup requires your source images to live outside the web root, or if that's just the way you roll, you can override the DataLoader service and define a custom path, as the third argument, that replaces %liip_imagine.web_root% (example here in XML):

<service id="liip_imagine.data.loader.filesystem" class="%liip_imagine.data.loader.filesystem.class%">
    <tag name="liip_imagine.data.loader" loader="filesystem" />
    <argument type="service" id="liip_imagine" />
    <argument>%liip_imagine.formats%</argument>
    <argument>%kernel.root_dir%/data/uploads</argument>
</service>

One way to override a service is by redefining it in the services configuration file of your bundle. Another way would be by modifying the service definition from your bundle's Dependency Injection Extension:

$container->getDefinition('liip_imagine.data.loader.filesystem')
          ->replaceArgument(2, '%kernel.root_dir%/data/uploads');

Custom image loaders

The ImagineBundle allows you to add your custom image loader classes. The only requirement is that each data loader implement the following interface:

Liip\ImagineBundle\Imagine\Data\Loader\LoaderInterface

To tell the bundle about your new data loader, register it in the service container and apply the liip_imagine.data.loader tag to it (example here in XML):

<service id="acme_imagine.data.loader.my_custom" class="Acme\ImagineBundle\Imagine\Data\Loader\MyCustomDataLoader">
    <tag name="liip_imagine.data.loader" loader="my_custom_data" />
    <argument type="service" id="liip_imagine" />
    <argument>%liip_imagine.formats%</argument>
</service>

For more information on the service container, see the Symfony2 Service Container documentation.

You can set your custom data loader by adding it to the your configuration as the new default loader as follows:

liip_imagine:
    data_loader: my_custom_data

Alternatively you can only set the custom data loader for just a specific filter set:

liip_imagine:
    filter_sets:
        my_special_style:
            data_loader: my_custom_data
            filters:
                my_custom_filter: { }

For an example of a data loader implementation, refer to Liip\ImagineBundle\Imagine\Data\Loader\FileSystemLoader.

StreamLoader

The Liip\ImagineBundle\Imagine\Data\Loader\StreamLoader allows to read images from any stream registered thus allowing you to serve your images from literally anywhere.

The example service definition shows how to use a stream wrapped by the Gaufrette filesystem abstraction layer. In order to have this example working, you need to register the stream wrapper first, refer to the Gaufrette README on how to do this.

services:
    liip_imagine.data.loader.stream.profile_photos:
        class: "%liip_imagine.data.loader.stream.class%"
        arguments:
            - "@liip_imagine"
            - 'gaufrette://profile_photos/'
        tags:
            - { name: 'liip_imagine.data.loader', loader: 'stream.profile_photos' }

GridFSLoader

Load your images from mongodb

liip_imagine:
    filter_sets:
        my_special_style:
            data_loader: grid_fs
            filters:
                my_custom_filter: { }

Add loader to your services

   <service id="liip_imagine.data.loader.grid_fs" class="Liip\ImagineBundle\Imagine\Data\Loader\GridFSLoader">
       <tag name="liip_imagine.data.loader" loader="grid_fs" />
       <argument type="service" id="liip_imagine" />
       <argument type="service" id="doctrine.odm.mongodb.document_manager" />
       <argument>Application\ImageBundle\Document\Image</argument>
   </service>

Reference the image by its id

<img src="{{ image.id | imagine_filter('my_thumb') }}" />

Extending the image loader with data transformers

You can extend a custom data loader to support virtually any file type using transformers. A data tranformer is intended to transform a file before actually rendering it. You can refer to Liip\ImagineBundle\Imagine\Data\Loader\ExtendedFileSystemLoader and to Liip\ImagineBundle\Imagine\Data\Transformer\PdfTransformer as an example.

ExtendedFileSystemLoader extends FileSystemLoader and takes, as argument, an array of transformers. In the example, when a file with the pdf extension is passed to the data loader, PdfTransformer uses a php imagick object (injected via the service container) to extract the first page of the document and returns it to the data loader as a png image.

To tell the bundle about the transformers, you have to register them as services with the new loader:

services:
    imagick_object:
        class:   Imagick
    acme_custom_transformer:
        class:     Acme\ImagineBundle\Imagine\Data\Transformer\MyCustomTransformer
        arguments:
            -    '@imagick_object'
    custom_loader:
        class:     Acme\ImagineBundle\Imagine\Data\Loader\MyCustomDataLoader
        tags:
            -    { name: liip_imagine.data.loader, loader: custom_data_loader }
        arguments:
            -    '@liip_imagine'
            -    %liip_imagine.formats%
            -    %liip_imagine.data_root%
            -    [ '@acme_custom_transformer' ]

Now you can use your custom data loader, with its transformers, setting it as in the previous section.

Custom cache resolver

The ImagineBundle allows you to add your custom cache resolver classes. The only requirement is that each cache resolver loader implement the following interface:

Liip\ImagineBundle\Imagine\Cache\Resolver\ResolverInterface

To tell the bundle about your new cache resolver, register it in the service container and apply the liip_imagine.cache.resolver tag to it (example here in XML):

<service id="acme_imagine.cache.resolver.my_custom" class="Acme\ImagineBundle\Imagine\Cache\Resolver\MyCustomCacheResolver">
    <tag name="liip_imagine.cache.resolver" resolver="my_custom_cache" />
    <argument type="service" id="filesystem" />
    <argument type="service" id="router" />
    <argument>%liip_imagine.web_root%</argument>
</service>

For more information on the service container, see the Symfony2 Service Container documentation.

You can set your custom cache reslover by adding it to the your configuration as the new default resolver as follows:

liip_imagine:
    cache: my_custom_cache

Alternatively you can only set the custom cache resolver for just a specific filter set:

liip_imagine:
    filter_sets:
        my_special_style:
            cache: my_custom_cache
            filters:
                my_custom_filter: { }

For an example of a cache resolver implementation, refer to Liip\ImagineBundle\Imagine\Cache\Resolver\WebPathResolver.

Cache cleaner

Custom cache resolver classes must implement the clear method, at worst doing nothing.

When the console cache:clear command is run, the clear method of all the registered cache resolvers is automatically called.

AmazonS3Resolver

The AmazonS3Resolver requires the aws-sdk-php.

You can add the SDK by adding those lines to your deps file.

[aws-sdk]
    git=git://github.com/amazonwebservices/aws-sdk-for-php.git

Afterwards, you only need to configure some information regarding your AWS account and the bucket.

parameters:
    amazon_s3.key: 'your-aws-key'
    amazon_s3.secret: 'your-aws-secret'
    amazon_s3.bucket: 'your-bucket.example.com'

Now you can set up the services required:

services:
    acme.amazon_s3:
        class: AmazonS3
        arguments:
            -
                key: %amazon_s3.key%
                secret: %amazon_s3.secret%
                # more S3 specific options, see \AmazonS3::__construct()

    acme.imagine.cache.resolver.amazon_s3:
        class: Liip\ImagineBundle\Imagine\Cache\Resolver\AmazonS3Resolver
        arguments:
            - "@acme.amazon_s3"
            - "%amazon_s3.bucket%"
        tags:
            - { name: 'liip_imagine.cache.resolver', resolver: 'amazon_s3' }

Now you are ready to use the AmazonS3Resolver by configuring the bundle. The following example will configure the resolver is default.

liip_imagine:
    cache: 'amazon_s3'

If you want to use other buckets for other images, simply alter the parameter names and create additional services!

Dynamic filters

With a custom data loader it is possible to dynamically modify the configuration that will be applied to the image. Inside the controller you can access the FilterConfiguration instance, dynamically adjust the filter configuration (for example based on information associated with the image or whatever other logic you might want) and set it again.

A simple example showing how to change the filter configuration dynamically. This example is of course "bogus" since hardcoded values could just as well be set in the configuration but it illustrates the core idea.

    public function filterAction(Request $request, $path, $filter)
    {
        $targetPath = $this->cacheManager->resolve($request, $path, $filter);
        if ($targetPath instanceof Response) {
            return $targetPath;
        }

        $image = $this->dataManager->find($filter, $path);

        $filterConfig = $this->filterManager->getFilterConfiguration();
        $config = $filterConfig->get($filter);
        $config['filters']['thumbnail']['size'] = array(300, 100);
        $filterConfig->set($filter, $config);

        $response = $this->filterManager->get($request, $filter, $image, $path);

        if ($targetPath) {
            $response = $this->cacheManager->store($response, $targetPath, $filter);
        }

        return $response;
    }

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Symfony2 Bundle to assist in imagine manipulation using the imagine library

liip.ch

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