1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
/*
* Copyright (C) 2007 Richard Hughes <richard@hughsie.com>
*
* Licensed under the GNU Lesser General Public License Version 2
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <gmodule.h>
#include <glib.h>
#include <ohm-plugin.h>
#include <dbus/dbus-glib.h>
#define HAL_DBUS_SERVICE "org.freedesktop.Hal"
#define HAL_DBUS_INTERFACE_LAPTOP_PANEL "org.freedesktop.Hal.Device.LaptopPanel"
enum {
CONF_BRIGHTNESS_PERCENT_CHANGED,
CONF_BRIGHTNESS_HARDWARE_CHANGED,
CONF_LAST
};
typedef struct {
gint levels;
} OhmPluginCacheData;
static OhmPluginCacheData data;
static gboolean
backlight_set_brightness (OhmPlugin *plugin, guint brightness)
{
DBusGConnection *connection;
DBusGProxy *proxy;
GError *error;
gboolean ret;
gint retval;
gchar *udi;
/* get udi and connection, assume connected */
udi = ohm_plugin_hal_get_udi (plugin, 0);
if (udi == NULL) {
g_warning ("cannot set brightness as no device!");
return FALSE;
}
connection = dbus_g_bus_get (DBUS_BUS_SYSTEM, NULL);
/* reuse the connection from HAL */
proxy = dbus_g_proxy_new_for_name (connection,
HAL_DBUS_SERVICE, udi,
HAL_DBUS_INTERFACE_LAPTOP_PANEL);
/* get the brightness from HAL */
error = NULL;
ret = dbus_g_proxy_call (proxy, "SetBrightness", &error,
G_TYPE_INT, (int)brightness,
G_TYPE_INVALID,
G_TYPE_UINT, &retval,
G_TYPE_INVALID);
if (error != NULL) {
g_printerr ("Error: %s\n", error->message);
g_error_free (error);
}
g_object_unref (proxy);
g_free (udi);
return ret;
}
#if 0
static gboolean
backlight_get_brightness (OhmPlugin *plugin, guint *brightness)
{
DBusConnection *connection;
DBusGProxy *proxy;
GError *error;
gboolean ret;
int level = 0;
/* reuse the connection from HAL */
connection = libhal_ctx_get_dbus_connection (ctx);
proxy = dbus_g_proxy_new_for_name (connection, HAL_DBUS_SERVICE, udi, HAL_DBUS_INTERFACE_LAPTOP_PANEL);
if (udi == NULL) {
g_warning ("cannot get brightness as no device!");
return FALSE;
}
/* get the brightness from HAL */
error = NULL;
ret = dbus_g_proxy_call (proxy, "GetBrightness", &error,
G_TYPE_INVALID,
G_TYPE_UINT, &level,
G_TYPE_INVALID);
if (error != NULL) {
g_printerr ("Error: %s\n", error->message);
g_error_free (error);
level = 0;
}
*brightness = level;
g_object_unref (proxy);
return ret;
}
#endif
static guint
percent_to_discrete (guint percentage,
guint levels)
{
/* check we are in range */
if (percentage > 100) {
return levels;
}
if (levels == 0) {
g_warning ("levels is 0!");
return 0;
}
return ((gfloat) percentage * (gfloat) (levels - 1)) / 100.0f;
}
/**
* plugin_initalize:
* @plugin: This class instance
*
* Coldplug, i.e. read and set the initial state of the plugin.
* We can assume all the required modules have been loaded, although it's
* dangerous to assume the key values are anything other than the defaults.
*/
static void
plugin_initalize (OhmPlugin *plugin)
{
guint num;
/* interested keys, either can be changed without changing the other */
/* initalize HAL */
ohm_plugin_hal_init (plugin);
/* get the only device with capability and watch it */
num = ohm_plugin_hal_add_device_capability (plugin, "laptop_panel");
if (num > 1) {
g_warning ("not tested with not one laptop_panel");
}
if (num != 0) {
/* get levels that the adapter supports -- this does not change ever */
ohm_plugin_hal_get_int (plugin, 0, "laptop_panel.num_levels", &data.levels);
if (data.levels == 0) {
g_error ("levels zero!");
return;
}
ohm_plugin_conf_set_key (plugin, "backlight.num_levels", data.levels);
}
}
/**
* plugin_notify:
* @plugin: This class instance
*
* Notify the plugin that a key marked with ohm_plugin_conf_interested ()
* has it's value changed.
* An enumerated numeric id rather than the key is returned for processing speed.
*/
static void
plugin_notify (OhmPlugin *plugin, gint id, gint value)
{
guint hw;
if (id == CONF_BRIGHTNESS_PERCENT_CHANGED) {
hw = percent_to_discrete (value, data.levels);
ohm_plugin_conf_set_key (plugin, "backlight.hardware_brightness", hw);
// backlight_set_brightness (plugin, hw); ------ SHOULDN'T BE NEEDED
} else if (id == CONF_BRIGHTNESS_HARDWARE_CHANGED) {
backlight_set_brightness (plugin, value);
}
}
OHM_PLUGIN_DESCRIPTION (
"OHM Backlight",
"0.0.2",
"richard@hughsie.com",
OHM_LICENSE_LGPL,
plugin_initalize,
NULL,
plugin_notify);
OHM_PLUGIN_INTERESTED (
{"backlight.hardware_brightness", CONF_BRIGHTNESS_HARDWARE_CHANGED},
{"backlight.percent_brightness", CONF_BRIGHTNESS_PERCENT_CHANGED});
OHM_PLUGIN_PROVIDES (
"backlight.state",
"backlight.hardware_brightness",
"backlight.percent_brightness",
"backlight.num_levels");
|
