1 /*
2 * Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
3 *
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining
7 * a copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation on the rights to use, copy, modify, merge,
10 * publish, distribute, sublicense, and/or sell copies of the Software,
11 * and to permit persons to whom the Software is furnished to do so,
12 * subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial
16 * portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21 * NON-INFRINGEMENT. IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
22 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
23 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
24 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
25 * SOFTWARE.
26 */
27
28 /*
29 * Author:
30 * Rickard E. (Rik) Faith <faith@redhat.com>
31 *
32 */
33
34 /** \file
35 * Provides DPMS support and unifies all DPMS and other screen-saver
36 * support in one file. If -dpms is given on the command line, or the
37 * Xdmx server is not compiled with DPMS support, then the DPMS extension
38 * does not work for clients, but DPMS on the backends is still disables
39 * (and restored at Xdmx server shutdown time).
40 */
41
42 #ifdef HAVE_DMX_CONFIG_H
43 #include <dmx-config.h>
44 #endif
45
46 #include "dmx.h"
47 #include "dmxdpms.h"
48 #include "dmxlog.h"
49 #include "dmxsync.h"
50 #ifdef DPMSExtension
51 #include "dpmsproc.h"
52 #endif
53 #include "windowstr.h" /* For screenIsSaved */
54 #include <X11/extensions/dpms.h>
55
56 static int
_dmxDPMSInit(DMXScreenInfo * dmxScreen)57 _dmxDPMSInit(DMXScreenInfo * dmxScreen)
58 {
59 int event_base, error_base;
60 int major, minor;
61 CARD16 level, standby, suspend, off;
62 BOOL state;
63 const char *monitor;
64
65 #ifdef DPMSExtension
66 if (DPMSDisabledSwitch)
67 return FALSE;
68 #endif
69
70 dmxScreen->dpmsCapable = 0;
71
72 if (!dmxScreen->beDisplay) {
73 dmxLogOutput(dmxScreen,
74 "Cannot determine if DPMS supported (detached screen)\n");
75 return FALSE;
76 }
77
78 if (!DPMSQueryExtension(dmxScreen->beDisplay, &event_base, &error_base)) {
79 dmxLogOutput(dmxScreen, "DPMS not supported\n");
80 return FALSE;
81 }
82 if (!DPMSGetVersion(dmxScreen->beDisplay, &major, &minor)) {
83 dmxLogOutput(dmxScreen, "DPMS not supported\n");
84 return FALSE;
85 }
86 if (!DPMSCapable(dmxScreen->beDisplay)) {
87 dmxLogOutput(dmxScreen, "DPMS %d.%d (not DPMS capable)\n",
88 major, minor);
89 return FALSE;
90 }
91
92 DPMSInfo(dmxScreen->beDisplay, &level, &state);
93 DPMSGetTimeouts(dmxScreen->beDisplay, &standby, &suspend, &off);
94 DPMSSetTimeouts(dmxScreen->beDisplay, 0, 0, 0);
95 DPMSEnable(dmxScreen->beDisplay);
96 DPMSForceLevel(dmxScreen->beDisplay, DPMSModeOn);
97 dmxScreen->dpmsCapable = 1;
98 dmxScreen->dpmsEnabled = ! !state;
99 dmxScreen->dpmsStandby = standby;
100 dmxScreen->dpmsSuspend = suspend;
101 dmxScreen->dpmsOff = off;
102
103 switch (level) {
104 case DPMSModeOn:
105 monitor = "on";
106 break;
107 case DPMSModeStandby:
108 monitor = "standby";
109 break;
110 case DPMSModeSuspend:
111 monitor = "suspend";
112 break;
113 case DPMSModeOff:
114 monitor = "off";
115 break;
116 default:
117 monitor = "unknown";
118 break;
119 }
120
121 dmxLogOutput(dmxScreen,
122 "DPMS %d.%d (%s, %s, %d %d %d)\n",
123 major, minor, monitor, state ? "enabled" : "disabled",
124 standby, suspend, off);
125 return TRUE;
126 }
127
128 /** Initialize DPMS support. We save the current settings and turn off
129 * DPMS. The settings are restored in #dmxDPMSTerm. */
130 int
dmxDPMSInit(DMXScreenInfo * dmxScreen)131 dmxDPMSInit(DMXScreenInfo * dmxScreen)
132 {
133 int interval, preferBlanking, allowExposures;
134
135 /* Turn off DPMS */
136 if (!_dmxDPMSInit(dmxScreen))
137 return FALSE;
138
139 if (!dmxScreen->beDisplay)
140 return FALSE;
141
142 /* Turn off screen saver */
143 XGetScreenSaver(dmxScreen->beDisplay, &dmxScreen->savedTimeout, &interval,
144 &preferBlanking, &allowExposures);
145 XSetScreenSaver(dmxScreen->beDisplay, 0, interval,
146 preferBlanking, allowExposures);
147 XResetScreenSaver(dmxScreen->beDisplay);
148 dmxSync(dmxScreen, FALSE);
149 return TRUE;
150 }
151
152 /** Terminate DPMS support on \a dmxScreen. We restore the settings
153 * saved in #dmxDPMSInit. */
154 void
dmxDPMSTerm(DMXScreenInfo * dmxScreen)155 dmxDPMSTerm(DMXScreenInfo * dmxScreen)
156 {
157 int timeout, interval, preferBlanking, allowExposures;
158
159 if (!dmxScreen->beDisplay)
160 return;
161
162 XGetScreenSaver(dmxScreen->beDisplay, &timeout, &interval,
163 &preferBlanking, &allowExposures);
164 XSetScreenSaver(dmxScreen->beDisplay, dmxScreen->savedTimeout, interval,
165 preferBlanking, allowExposures);
166 if (dmxScreen->dpmsCapable) {
167 /* Restore saved state */
168 DPMSForceLevel(dmxScreen->beDisplay, DPMSModeOn);
169 DPMSSetTimeouts(dmxScreen->beDisplay, dmxScreen->dpmsStandby,
170 dmxScreen->dpmsSuspend, dmxScreen->dpmsOff);
171 if (dmxScreen->dpmsEnabled)
172 DPMSEnable(dmxScreen->beDisplay);
173 else
174 DPMSDisable(dmxScreen->beDisplay);
175 }
176 dmxSync(dmxScreen, FALSE);
177 }
178
179 /** Called when activity is detected so that DPMS power-saving mode can
180 * be deactivated. */
181 void
dmxDPMSWakeup(void)182 dmxDPMSWakeup(void)
183 {
184 if (screenIsSaved == SCREEN_SAVER_ON)
185 dixSaveScreens(serverClient, SCREEN_SAVER_OFF, ScreenSaverReset);
186 #ifdef DPMSExtension
187 if (DPMSPowerLevel)
188 DPMSSet(serverClient, 0);
189 #endif
190 }
191
192 #ifdef DPMSExtension
193 void
dmxDPMSBackend(DMXScreenInfo * dmxScreen,int level)194 dmxDPMSBackend(DMXScreenInfo *dmxScreen, int level)
195 {
196 if (dmxScreen->beDisplay) {
197 DPMSForceLevel(dmxScreen->beDisplay, level);
198 dmxSync(dmxScreen, FALSE);
199 }
200 }
201 #endif
202