+
+void
+file_chooser_dialog_add_writable_pixbuf_formats (GtkFileChooser *chooser)
+{
+ GSList *pixbuf_formats = NULL;
+ GSList *iter;
+ GtkFileFilter *filter;
+ int i;
+
+ filter = gtk_file_filter_new();
+ gtk_file_filter_set_name (filter, _("By extension"));
+ g_object_set_data (G_OBJECT(filter), "pixbuf-format", NULL);
+ gtk_file_chooser_add_filter (chooser, filter);
+
+ pixbuf_formats = gdk_pixbuf_get_formats ();
+
+ for (iter = pixbuf_formats; iter; iter = iter->next) {
+ GdkPixbufFormat *format = iter->data;
+
+ gchar *description, *name, *extensions;
+ gchar **extension_list, **mime_types;
+
+ if (gdk_pixbuf_format_is_disabled (format) ||
+ !gdk_pixbuf_format_is_writable (format))
+ continue;
+
+ name = gdk_pixbuf_format_get_description (format);
+ extension_list = gdk_pixbuf_format_get_extensions (format);
+ extensions = g_strjoinv (", ", extension_list);
+ g_strfreev (extension_list);
+ description = g_strdup_printf ("%s (%s)", name, extensions);
+
+ filter = gtk_file_filter_new ();
+ gtk_file_filter_set_name (filter, description);
+ g_object_set_data (G_OBJECT (filter), "pixbuf-format", format);
+ gtk_file_chooser_add_filter (chooser, filter);
+
+ g_free (description);
+ g_free (extensions);
+ g_free (name);
+
+ mime_types = gdk_pixbuf_format_get_mime_types (format);
+ for (i = 0; mime_types[i] != 0; i++)
+ gtk_file_filter_add_mime_type (filter, mime_types[i]);
+ g_strfreev (mime_types);
+ }
+
+ g_slist_free (pixbuf_formats);
+}
+
+GdkPixbufFormat*
+get_gdk_pixbuf_format_by_extension (gchar *uri)
+{
+ GSList *pixbuf_formats = NULL;
+ GSList *iter;
+ int i;
+
+ pixbuf_formats = gdk_pixbuf_get_formats ();
+
+ for (iter = pixbuf_formats; iter; iter = iter->next) {
+ gchar **extension_list;
+ GdkPixbufFormat *format = iter->data;
+
+ if (gdk_pixbuf_format_is_disabled (format) ||
+ !gdk_pixbuf_format_is_writable (format))
+ continue;
+
+ extension_list = gdk_pixbuf_format_get_extensions (format);
+
+ for (i = 0; extension_list[i] != 0; i++) {
+ if (g_str_has_suffix (uri, extension_list[i])) {
+ g_slist_free (pixbuf_formats);
+ g_strfreev (extension_list);
+ return format;
+ }
+ }
+ g_strfreev (extension_list);
+ }
+
+ g_slist_free (pixbuf_formats);
+ return NULL;
+}