Merge branch 'friemann/flatpak-webp' into 'master'

flatpak: Add webp pixbuf loader to the build

Closes #250

See merge request !139

org.gnome.Eog.json

@@ -17,7 +17,8 @@
         "--filesystem=xdg-run/dconf",
         "--filesystem=~/.config/dconf:ro",
         "--talk-name=ca.desrt.dconf",
-        "--env=DCONF_USER_CONFIG_DIR=.config/dconf"
+        "--env=DCONF_USER_CONFIG_DIR=.config/dconf",
+        "--env=GDK_PIXBUF_MODULE_FILE=/app/lib/gdk-pixbuf-2.0/2.10.0/loaders.cache"
     ],
     "cleanup" : [
         "/include",
@@ -67,7 +68,7 @@
             "buildsystem" : "meson",
             "config-opts" : [
                 "-Ddemos=false"
-	    ],
+            ],
             "cleanup" : [
                 "/bin/*"
             ],
@@ -92,6 +93,28 @@
                 }
             ]
         },
+        {
+            "name" : "webp-pixbuf-loader",
+            "buildsystem" : "meson",
+            "config-opts" : [
+                "-Dgdk_pixbuf_moduledir=/app/lib/gdk-pixbuf-2.0/2.10.0/loaders/"
+            ],
+            "sources" : [
+                {
+                    "type" : "git",
+                    "url" : "https://github.com/aruiz/webp-pixbuf-loader.git",
+                    "tag" : "0.0.6"
+                }
+            ]
+        },
+        {
+            "name" : "update-pixbuf-loaders",
+            "buildsystem" : "simple",
+            "build-commands" : [
+                "GDK_PIXBUF_MODULEDIR=/app/lib/gdk-pixbuf-2.0/2.10.0/loaders/ gdk-pixbuf-query-loaders > /app/lib/gdk-pixbuf-2.0/2.10.0/loaders.cache",
+                "gdk-pixbuf-query-loaders >> /app/lib/gdk-pixbuf-2.0/2.10.0/loaders.cache"
+            ]
+        },
         {
             "name" : "eog",
             "buildsystem" : "meson",