implement interlace filter

Author: wodka

Imagine/Filter/Loader/InterlaceFilterLoader.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace Liip\ImagineBundle\Imagine\Filter\Loader;
+
+use Imagine\Image\ImageInterface;
+
+class InterlaceFilterLoader implements LoaderInterface
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function load(ImageInterface $image, array $options = array())
+    {
+        $mode = ImageInterface::INTERLACE_LINE;
+        if (empty($options['mode']) {
+            $mode = $options['mode'];
+        }
+        
+        $image->interlace(ImageInterface::INTERLACE_LINE);
+
+        return $image;
+    }
+}

Resources/config/imagine.xml

@@ -41,6 +41,7 @@
         <parameter key="liip_imagine.filter.loader.background.class">Liip\ImagineBundle\Imagine\Filter\Loader\BackgroundFilterLoader</parameter>
         <parameter key="liip_imagine.filter.loader.upscale.class">Liip\ImagineBundle\Imagine\Filter\Loader\UpscaleFilterLoader</parameter>
         <parameter key="liip_imagine.filter.loader.auto_rotate.class">Liip\ImagineBundle\Imagine\Filter\Loader\AutoRotateFilterLoader</parameter>
+        <parameter key="liip_imagine.filter.loader.interlace.class">Liip\ImagineBundle\Imagine\Filter\Loader\InterlaceFilterLoader</parameter>
 
         <!-- Data loaders' classes -->
 
@@ -171,6 +172,10 @@
             <tag name="liip_imagine.filter.loader" loader="auto_rotate" />
         </service>
 
+        <service id="liip_imagine.filter.loader.interlace" class="%liip_imagine.filter.loader.interlace.class%">
+            <tag name="liip_imagine.filter.loader" loader="interlace" />
+        </service>
+
         <!-- Data loaders -->
 
         <service id="liip_imagine.binary.loader.prototype.filesystem" class="%liip_imagine.binary.loader.filesystem.class%">

Resources/doc/filters.md

@@ -149,6 +149,20 @@ liip_imagine:
         my_thumb:
             filters:
                 auto_rotate: ~
+
+### The `interlace` filter
+
+Set progressive loading on the image
+Configuration looks like this:
+
+``` yaml
+liip_imagine:
+    filter_sets:
+        my_thumb:
+            filters:
+                interlace:
+                    # mode can be one of none,line,plane,partition
+                    mode: line
 ```
 ## Load your Custom Filters