Add a backlight interface so we can control backlight brightness without HAL

4 files changed, 434 insertions, 0 deletions

diff --git a/devkit-power-gobject/Makefile.am b/devkit-power-gobject/Makefile.am
index 588ebce..d3b5c92 100644
--- a/devkit-power-gobject/Makefile.am
+++ b/devkit-power-gobject/Makefile.am
@@ -16,6 +16,7 @@ libdevkit_power_include_HEADERS =				\
 	devicekit-power.h					\
 	dkp-version.h						\
 	dkp-client.h						\
+	dkp-backlight.h						\
 	dkp-device.h						\
 	dkp-wakeups.h						\
 	dkp-qos-obj.h						\
@@ -31,6 +32,8 @@ libdevkit_power_gobject_la_SOURCES =				\
 	dkp-client.h						\
 	dkp-device.c						\
 	dkp-device.h						\
+	dkp-backlight.c						\
+	dkp-backlight.h						\
 	dkp-wakeups.c						\
 	dkp-wakeups.h						\
 	dkp-qos-obj.c						\
diff --git a/devkit-power-gobject/devicekit-power.h b/devkit-power-gobject/devicekit-power.h
index 6d173a9..019bf42 100644
--- a/devkit-power-gobject/devicekit-power.h
+++ b/devkit-power-gobject/devicekit-power.h
@@ -37,6 +37,7 @@
 #include <devkit-power-gobject/dkp-stats-obj.h>
 #include <devkit-power-gobject/dkp-wakeups.h>
 #include <devkit-power-gobject/dkp-wakeups-obj.h>
+#include <devkit-power-gobject/dkp-backlight.h>
 
 #undef __DEVICEKIT_POWER_H_INSIDE__
 
diff --git a/devkit-power-gobject/dkp-backlight.c b/devkit-power-gobject/dkp-backlight.c
new file mode 100644
index 0000000..cbd3a5b
--- /dev/null
+++ b/devkit-power-gobject/dkp-backlight.c
@@ -0,0 +1,366 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2009 Richard Hughes <richard@hughsie.com>
+ *
+ * Licensed under the GNU General Public License Version 2
+ *
+ * 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 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <glib.h>
+#include <dbus/dbus-glib.h>
+
+#include "dkp-backlight.h"
+
+static void	dkp_backlight_class_init	(DkpBacklightClass	*klass);
+static void	dkp_backlight_init	(DkpBacklight		*backlight);
+static void	dkp_backlight_finalize	(GObject		*object);
+
+#define DKP_BACKLIGHT_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), DKP_TYPE_BACKLIGHT, DkpBacklightPrivate))
+
+struct DkpBacklightPrivate
+{
+	DBusGConnection		*bus;
+	DBusGProxy		*proxy;
+	DBusGProxy		*prop_proxy;
+	gboolean		 have_interface;
+	gboolean		 have_properties;
+	gboolean		 action_in_hardware;
+	guint			 actual;
+	guint			 maximum;
+};
+
+enum
+{
+	BRIGHTNESS_CHANGED,
+	LAST_SIGNAL
+};
+
+enum
+{
+	PROP_0,
+	PROP_ACTUAL,
+	PROP_MAXIMUM,
+	PROP_ACTION_IN_HARDWARE,
+	PROP_LAST
+};
+
+static guint signals [LAST_SIGNAL] = { 0 };
+
+G_DEFINE_TYPE (DkpBacklight, dkp_backlight, G_TYPE_OBJECT)
+
+/**
+ * dkp_backlight_set_brightness:
+ *
+ * Sets the backlight brightness
+ **/
+gboolean
+dkp_backlight_set_brightness (DkpBacklight *backlight, guint value, GError **error)
+{
+	GError *error_local = NULL;
+	gboolean ret = FALSE;
+
+	g_return_val_if_fail (DKP_IS_BACKLIGHT (backlight), FALSE);
+	g_return_val_if_fail (backlight->priv->proxy != NULL, FALSE);
+
+	/* no device */
+	if (!backlight->priv->have_interface) {
+		if (error != NULL)
+			*error = g_error_new (1, 0, "no device to control");
+		goto out;
+	}
+
+	/* set brightness */
+	ret = dbus_g_proxy_call (backlight->priv->proxy, "SetBrightness", &error_local,
+				 G_TYPE_UINT, value,
+				 G_TYPE_INVALID,
+				 G_TYPE_INVALID);
+	if (!ret) {
+		g_warning ("SetBrightness failed: %s", error_local->message);
+		if (error != NULL)
+			*error = g_error_new (1, 0, "%s", error_local->message);
+		g_error_free (error_local);
+		goto out;
+	}
+out:
+	return ret;
+}
+
+/**
+ * dkp_backlight_ensure_properties:
+ **/
+static void
+dkp_backlight_ensure_properties (DkpBacklight *backlight)
+{
+	gboolean ret;
+	GError *error;
+	GHashTable *props;
+	GValue *value;
+
+	props = NULL;
+
+	if (backlight->priv->have_properties)
+		goto out;
+
+	/* no device */
+	if (!backlight->priv->have_interface)
+		goto out;
+
+	error = NULL;
+	ret = dbus_g_proxy_call (backlight->priv->prop_proxy, "GetAll", &error,
+				 G_TYPE_STRING, "org.freedesktop.DeviceKit.Power.Backlight",
+				 G_TYPE_INVALID,
+				 dbus_g_type_get_map ("GHashTable", G_TYPE_STRING, G_TYPE_VALUE), &props,
+				 G_TYPE_INVALID);
+	if (!ret) {
+		g_debug ("Error invoking GetAll() to get properties: %s", error->message);
+		backlight->priv->have_interface = FALSE;
+		g_error_free (error);
+		goto out;
+	}
+
+	value = g_hash_table_lookup (props, "action-in-hardware");
+	if (value == NULL) {
+		g_warning ("No 'action-in-hardware' property");
+		goto out;
+	}
+	backlight->priv->action_in_hardware = g_value_get_boolean (value);
+
+	value = g_hash_table_lookup (props, "actual");
+	if (value == NULL) {
+		g_warning ("No 'actual' property");
+		goto out;
+	}
+	backlight->priv->actual = g_value_get_uint (value);
+
+	value = g_hash_table_lookup (props, "maximum");
+	if (value == NULL) {
+		g_warning ("No 'maximum' property");
+		goto out;
+	}
+	backlight->priv->maximum = g_value_get_uint (value);
+
+	/* cached */
+	backlight->priv->have_properties = TRUE;
+
+out:
+	if (props != NULL)
+		g_hash_table_unref (props);
+}
+
+/**
+ * dkp_backlight_brightness_changed_cb:
+ **/
+static void
+dkp_backlight_brightness_changed_cb (DBusGProxy *proxy, guint value, DkpBacklight *backlight)
+{
+	backlight->priv->have_properties = FALSE;
+	g_signal_emit (backlight, signals [BRIGHTNESS_CHANGED], 0, value);
+}
+
+/**
+ * dkp_backlight_get_property:
+ **/
+static void
+dkp_backlight_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
+{
+	DkpBacklight *backlight = DKP_BACKLIGHT (object);
+
+	dkp_backlight_ensure_properties (backlight);
+
+	switch (prop_id) {
+	case PROP_ACTUAL:
+		g_value_set_uint (value, backlight->priv->actual);
+		break;
+	case PROP_MAXIMUM:
+		g_value_set_uint (value, backlight->priv->maximum);
+		break;
+	case PROP_ACTION_IN_HARDWARE:
+		g_value_set_boolean (value, backlight->priv->action_in_hardware);
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+		break;
+	}
+}
+
+/**
+ * dkp_backlight_set_property:
+ **/
+static void
+dkp_backlight_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
+{
+	DkpBacklight *backlight = DKP_BACKLIGHT (object);
+
+	switch (prop_id) {
+	case PROP_ACTUAL:
+		backlight->priv->actual = g_value_get_uint (value);
+		break;
+	case PROP_MAXIMUM:
+		backlight->priv->maximum = g_value_get_uint (value);
+		break;
+	case PROP_ACTION_IN_HARDWARE:
+		backlight->priv->action_in_hardware = g_value_get_boolean (value);
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+		break;
+	}
+}
+
+/**
+ * dkp_backlight_class_init:
+ * @klass: The DkpBacklightClass
+ **/
+static void
+dkp_backlight_class_init (DkpBacklightClass *klass)
+{
+	GObjectClass *object_class = G_OBJECT_CLASS (klass);
+	object_class->finalize = dkp_backlight_finalize;
+	object_class->get_property = dkp_backlight_get_property;
+	object_class->set_property = dkp_backlight_set_property;
+
+	signals [BRIGHTNESS_CHANGED] =
+		g_signal_new ("brightness-changed",
+			      G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST,
+			      G_STRUCT_OFFSET (DkpBacklightClass, brightness_changed),
+			      NULL, NULL, g_cclosure_marshal_VOID__UINT,
+			      G_TYPE_NONE, 1, G_TYPE_UINT);
+
+	/**
+	 * DkpBacklight:actual:
+	 */
+	g_object_class_install_property (object_class,
+					 PROP_ACTUAL,
+					 g_param_spec_uint ("actual",
+							    NULL, NULL,
+							    0,
+							    G_MAXUINT,
+							    0,
+							    G_PARAM_READWRITE));
+
+	/**
+	 * DkpBacklight:maximum:
+	 */
+	g_object_class_install_property (object_class,
+					 PROP_MAXIMUM,
+					 g_param_spec_uint ("maximum",
+							    NULL, NULL,
+							    0,
+							    G_MAXUINT,
+							    0,
+							    G_PARAM_READWRITE));
+	/**
+	 * DkpBacklight:action-in-hardware:
+	 */
+	g_object_class_install_property (object_class,
+					 PROP_ACTION_IN_HARDWARE,
+					 g_param_spec_boolean ("action-in-hardware",
+							       NULL, NULL,
+							       FALSE,
+							       G_PARAM_READWRITE));
+
+	g_type_class_add_private (klass, sizeof (DkpBacklightPrivate));
+}
+
+/**
+ * dkp_backlight_init:
+ * @backlight: This class instance
+ **/
+static void
+dkp_backlight_init (DkpBacklight *backlight)
+{
+	GError *error = NULL;
+
+	backlight->priv = DKP_BACKLIGHT_GET_PRIVATE (backlight);
+	backlight->priv->have_properties = FALSE;
+	backlight->priv->actual = 0;
+	backlight->priv->maximum = 0;
+	backlight->priv->action_in_hardware = FALSE;
+	backlight->priv->have_interface = TRUE;
+
+	/* get on the bus */
+	backlight->priv->bus = dbus_g_bus_get (DBUS_BUS_SYSTEM, &error);
+	if (backlight->priv->bus == NULL) {
+		g_warning ("Couldn't connect to system bus: %s", error->message);
+		g_error_free (error);
+		goto out;
+	}
+
+	/* connect to properties interface */
+	backlight->priv->prop_proxy = dbus_g_proxy_new_for_name (backlight->priv->bus,
+							      "org.freedesktop.DeviceKit.Power",
+							      "/org/freedesktop/DeviceKit/Power/Backlight",
+							      "org.freedesktop.DBus.Properties");
+	if (backlight->priv->prop_proxy == NULL) {
+		g_warning ("Couldn't connect to proxy");
+		goto out;
+	}
+
+	/* connect to main interface */
+	backlight->priv->proxy = dbus_g_proxy_new_for_name (backlight->priv->bus,
+							 "org.freedesktop.DeviceKit.Power",
+							 "/org/freedesktop/DeviceKit/Power/Backlight",
+							 "org.freedesktop.DeviceKit.Power.Backlight");
+	if (backlight->priv->proxy == NULL) {
+		g_warning ("Couldn't connect to proxy");
+		goto out;
+	}
+	dbus_g_proxy_add_signal (backlight->priv->proxy, "BrightnessChanged", G_TYPE_UINT, G_TYPE_INVALID);
+
+	/* all callbacks */
+	dbus_g_proxy_connect_signal (backlight->priv->proxy, "BrightnessChanged",
+				     G_CALLBACK (dkp_backlight_brightness_changed_cb), backlight, NULL);
+out:
+	return;
+}
+
+/**
+ * dkp_backlight_finalize:
+ * @object: The object to finalize
+ **/
+static void
+dkp_backlight_finalize (GObject *object)
+{
+	DkpBacklight *backlight;
+
+	g_return_if_fail (DKP_IS_BACKLIGHT (object));
+
+	backlight = DKP_BACKLIGHT (object);
+	if (backlight->priv->proxy != NULL)
+		g_object_unref (backlight->priv->proxy);
+	if (backlight->priv->prop_proxy != NULL)
+		g_object_unref (backlight->priv->prop_proxy);
+
+	G_OBJECT_CLASS (dkp_backlight_parent_class)->finalize (object);
+}
+
+/**
+ * dkp_backlight_new:
+ *
+ * Return value: a new DkpBacklight object.
+ **/
+DkpBacklight *
+dkp_backlight_new (void)
+{
+	DkpBacklight *backlight;
+	backlight = g_object_new (DKP_TYPE_BACKLIGHT, NULL);
+	return DKP_BACKLIGHT (backlight);
+}
+
diff --git a/devkit-power-gobject/dkp-backlight.h b/devkit-power-gobject/dkp-backlight.h
new file mode 100644
index 0000000..8fb879e
--- /dev/null
+++ b/devkit-power-gobject/dkp-backlight.h
@@ -0,0 +1,64 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2009 Richard Hughes <richard@hughsie.com>
+ *
+ * Licensed under the GNU General Public License Version 2
+ *
+ * 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 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#if !defined (__DEVICEKIT_POWER_H_INSIDE__) && !defined (DKP_COMPILATION)
+#error "Only <devicekit-power.h> can be included directly."
+#endif
+
+#ifndef __DKP_BACKLIGHT_H
+#define __DKP_BACKLIGHT_H
+
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+
+#define DKP_TYPE_BACKLIGHT		(dkp_backlight_get_type ())
+#define DKP_BACKLIGHT(o)		(G_TYPE_CHECK_INSTANCE_CAST ((o), DKP_TYPE_BACKLIGHT, DkpBacklight))
+#define DKP_BACKLIGHT_CLASS(k)		(G_TYPE_CHECK_CLASS_CAST((k), DKP_TYPE_BACKLIGHT, DkpBacklightClass))
+#define DKP_IS_BACKLIGHT(o)		(G_TYPE_CHECK_INSTANCE_TYPE ((o), DKP_TYPE_BACKLIGHT))
+#define DKP_IS_BACKLIGHT_CLASS(k)	(G_TYPE_CHECK_CLASS_TYPE ((k), DKP_TYPE_BACKLIGHT))
+#define DKP_BACKLIGHT_GET_CLASS(o)	(G_TYPE_INSTANCE_GET_CLASS ((o), DKP_TYPE_BACKLIGHT, DkpBacklightClass))
+
+typedef struct DkpBacklightPrivate DkpBacklightPrivate;
+
+typedef struct
+{
+	 GObject		 parent;
+	 DkpBacklightPrivate	*priv;
+} DkpBacklight;
+
+typedef struct
+{
+	GObjectClass		 parent_class;
+	void			(*brightness_changed)	(DkpBacklight		*backlight,
+							 guint			 value);
+} DkpBacklightClass;
+
+GType		 dkp_backlight_get_type			(void);
+DkpBacklight	*dkp_backlight_new			(void);
+gboolean	 dkp_backlight_set_brightness		(DkpBacklight		*backlight,
+							 guint			 value,
+							 GError			**error);
+
+G_END_DECLS
+
+#endif /* __DKP_BACKLIGHT_H */
+