[gnome-books/wip/hadess/more-dead-code-cleanup: 2/4] flatpak: Add WebP support

[Bastien Nocera <hadess src gnome org>]

commit 70e42e62c95148ddb253e77f89ec5a7c69badd1c
Author: Bastien Nocera <hadess hadess net>
Date:   Sat Jan 26 15:13:46 2019 +0100

    flatpak: Add WebP support
    
    As was done in the Evince flatpak.

 flatpak/org.gnome.Books.json | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
---
diff --git a/flatpak/org.gnome.Books.json b/flatpak/org.gnome.Books.json
index accd4f38..451ae143 100644
--- a/flatpak/org.gnome.Books.json
+++ b/flatpak/org.gnome.Books.json
@@ -19,6 +19,8 @@
         "--talk-name=org.freedesktop.Tracker1",
         "--talk-name=org.freedesktop.Tracker1.Miner.Extract",
         "--env=TRACKER_SPARQL_BACKEND=bus",
+        /* For the WebP loader */
+        "--env=GDK_PIXBUF_MODULE_FILE=/app/lib/gdk-pixbuf-2.0/2.10.0/loaders.cache",
         /* Needed for dconf to work */
         "--filesystem=xdg-run/dconf", "--filesystem=~/.config/dconf:ro",
         "--talk-name=ca.desrt.dconf", "--env=DCONF_USER_CONFIG_DIR=.config/dconf"
@@ -40,6 +42,21 @@
                 }
             ]
         },
+        {
+            "name": "webp-pixbuf-loader",
+            "buildsystem": "cmake-ninja",
+            "sources": [
+                {
+                    "type": "git",
+                    "url": "https://github.com/aruiz/webp-pixbuf-loader.git";,
+                    "commit": "9b92950d49d7939f90ba7413deb7ec6b392b2054"
+                }
+            ],
+            "post-install": [
+                "GDK_PIXBUF_MODULEDIR=/app/lib/gdk-pixbuf-2.0/2.10.0/loaders/ gdk-pixbuf-query-loaders > 
loaders.cache",
+                "cat /usr/lib/*/gdk-pixbuf-2.0/2.10.0/loaders.cache loaders.cache > 
/app/lib/gdk-pixbuf-2.0/2.10.0/loaders.cache"
+            ]
+        },
         {
             "name": "popplerdata",
             "no-autogen": true,