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".

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 apples 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:
    web_root:     %kernel.root_dir%/../web
    data_root:    %liip_imagine.web_root%
    cache_prefix: /media/cache
    cache:        true
    data_loader:       ~
    controller_action: ~
    driver:       gd
    formats:      []
    filter_sets:  []

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)
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.

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 40x32
        my_increase:
            filters:
                relative_resize: { increase: 10 } # Transforms 50x40 to 60x50
        my_widen:
            filters:
                relative_resize: { scale: 2.5 }   # Transforms 50x40 to 125x100

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.

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.filter.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.

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="router" />
    <argument type="service" id="filesystem" />
    <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.

Dynamic filters

With a custom data loader it is possible to dynamically modify the configuration that will be applied to the image. To do this simple store the filter configuration along with the image. Inside the data loader read this configuration and dynamically change the configuration for the given filter inside the FilterConfiguration instance.

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