GIF support (I know you love it)

make sure you have php5-imagick and then enable with addPlugin('ImageMagick')

plugins/ImageMagick/ImageMagickPlugin.php

@@ -0,0 +1,101 @@
+<?php
+/**
+ * GNU social - a federating social network
+ *
+ * Plugin to handle more kinds of image formats thanks to ImageMagick
+ *
+ * PHP version 5
+ *
+ * LICENCE: This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @category  Plugin
+ * @package   GNUsocial
+ * @author    Mikael Nordfeldth <mmn@hethane.se>
+ * @copyright 2014 Free Software Foundation http://fsf.org
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link      https://www.gnu.org/software/social/
+ */
+
+if (!defined('GNUSOCIAL')) { exit(1); }
+
+/*
+ * Dependencies:
+ *  php5-imagick
+ *
+ * Provides:
+ *  Animated image support (for image/gif at least)
+ */
+
+class ImageMagickPlugin extends Plugin
+{
+    protected $resize_animated = false;
+
+    /**
+     * @param ImageFile $file An ImageFile object we're getting metadata for
+     * @param array $info The response from getimagesize()
+     */
+    public function onFillImageFileMetadata(ImageFile $imagefile) {
+        switch ($imagefile->type) {
+        case IMAGETYPE_GIF:
+            $magick = new Imagick($imagefile->filepath);
+            $magick = $magick->coalesceImages();
+            $imagefile->animated = $magick->getNumberImages()>1;
+            return false;
+        }
+
+        return true;
+    }
+
+    public function onStartResizeImageFile(ImageFile $imagefile, $outpath, array $box) {
+        // So far we only take over the resize for IMAGETYPE_GIF
+        // (and only animated for gifs!)
+        if ($imagefile->type == IMAGETYPE_GIF && $imagefile->animated) {
+            if (!$this->resize_animated) {
+                // Don't resize if not desired, due to CPU/time limitations
+                return false;
+            }
+            $magick = new Imagick($imagefile->filepath);
+            $magick = $magick->coalesceImages();
+            $magick->setIteratorIndex(0);
+            do {
+                $magick->cropImage($box['w'], $box['h'], $box['x'], $box['y']);
+                $magick->thumbnailImage($box['width'], $box['height']);
+                $magick->setImagePage($box['width'], $box['height'], 0, 0);
+            } while ($magick->nextImage());
+            $magick = $magick->deconstructImages();
+
+            // $magick->writeImages($outpath, true); did not work, had to use filehandle
+            // There's been bugs for writeImages in php5-imagick before, probably now too
+            $fh = fopen($outpath, 'w+');
+            $success = $magick->writeImagesFile($fh);
+            fclose($fh);
+
+            return !$success;
+        }
+        return true;
+    }
+
+    public function onPluginVersion(&$versions)
+    {
+        $versions[] = array('name' => 'ImageMagick',
+                            'version' => GNUSOCIAL_VERSION,
+                            'author' => 'Mikael Nordfeldth',
+                            'homepage' => 'http://gnu.io/social',
+                            'rawdescription' =>
+                            // TRANS: Plugin description.
+                            _m('Use ImageMagick for better image support.'));
+        return true;
+    }
+}
+