how to apply grayscale filter on an image?

Question

Could you please tell how to apply a grayscale filter on an image with LiipImagineBundle?

NB: I am using Symfony2

Thank,

Answer 1

This worked for me:

<?php

namespace AppBundle\Imagine\Filter\Loader;

use Imagine\Filter\Advanced\Grayscale;
use Imagine\Image\ImageInterface;
use Liip\ImagineBundle\Imagine\Filter\Loader\LoaderInterface;

/**
 * Apply a grayscale effect to image.
 */
class GrayscaleFilterLoader implements LoaderInterface
{
    /**
     * {@inheritdoc}
     */
    public function load(ImageInterface $image, array $options = [])
    {
        $filter = new Grayscale();

        return $filter->apply($image);
    }
}

Just define a service like this one:

services:
    liip_imagine.filter.loader.grayscale:
        class: AppBundle\Imagine\Filter\Loader\GrayscaleFilterLoader
        tags:
            - { name: liip_imagine.filter.loader, loader: grayscale}

And then a filter:

liip_imagine:
    filter_sets:
        grayscale:
            filters:
                grayscale: ~