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diff --git a/plugins/power/gsd-backlight.h b/plugins/power/gsd-backlight.h
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+/* -*- mode: c; style: linux -*-
+ *
+ * Copyright (C) 2017 Red Hat, Inc.
+ *
+ * Written by: Benjamin Berg <bberg@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _GSD_BACKLIGHT_H
+#define _GSD_BACKLIGHT_H
+
+#include <glib.h>
+#include <gio/gio.h>
+
+#define GNOME_DESKTOP_USE_UNSTABLE_API
+#include <libgnome-desktop/gnome-rr.h>
+
+
+G_BEGIN_DECLS
+
+#define GSD_TYPE_BACKLIGHT gsd_backlight_get_type ()
+G_DECLARE_FINAL_TYPE (GsdBacklight, gsd_backlight, GSD, BACKLIGHT, GObject);
+
+gint gsd_backlight_get_brightness (GsdBacklight *backlight,
+ gint *target);
+
+void gsd_backlight_set_brightness_async (GsdBacklight *backlight,
+ gint percentage,
+ GCancellable *cancellable,
+ GAsyncReadyCallback callback,
+ gpointer user_data);
+void gsd_backlight_step_up_async (GsdBacklight *backlight,
+ GCancellable *cancellable,
+ GAsyncReadyCallback callback,
+ gpointer user_data);
+void gsd_backlight_step_down_async (GsdBacklight *backlight,
+ GCancellable *cancellable,
+ GAsyncReadyCallback callback,
+ gpointer user_data);
+void gsd_backlight_cycle_up_async (GsdBacklight *backlight,
+ GCancellable *cancellable,
+ GAsyncReadyCallback callback,
+ gpointer user_data);
+
+gint gsd_backlight_set_brightness_finish (GsdBacklight *backlight,
+ GAsyncResult *res,
+ GError **error);
+
+gint gsd_backlight_step_up_finish (GsdBacklight *backlight,
+ GAsyncResult *res,
+ GError **error);
+
+gint gsd_backlight_step_down_finish (GsdBacklight *backlight,
+ GAsyncResult *res,
+ GError **error);
+
+gint gsd_backlight_cycle_up_finish (GsdBacklight *backlight,
+ GAsyncResult *res,
+ GError **error);
+
+const char* gsd_backlight_get_connector (GsdBacklight *backlight);
+
+GsdBacklight* gsd_backlight_new (GnomeRRScreen *screen,
+ GError **error);
+
+
+G_END_DECLS
+
+#endif /* _GSD_BACKLIGHT_H */