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comparison src/power/windows/SDL_syspower.c @ 3170:b7a48f533966

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Initial work on power subsystem for SDL 1.3.
author Ryan C. Gordon <icculus@icculus.org>
date Sun, 07 Jun 2009 06:06:35 +0000
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children 51750b7a966f
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3169:f294338ca6eb 3170:b7a48f533966
1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2009 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
19 Sam Lantinga
20 slouken@libsdl.org
21 */
22 #include "SDL_config.h"
23
24 #ifndef SDL_POWER_DISABLED
25 #ifdef SDL_POWER_WINDOWS
26
27 #define WIN32_LEAN_AND_MEAN
28 #include <windows.h>
29
30 #include "SDL_power.h"
31
32 SDL_bool
33 SDL_GetPowerInfo_Windows(SDL_PowerState *state, int *seconds, int *percent)
34 {
35 SYSTEM_POWER_STATUS status;
36 SDL_bool need_details = SDL_FALSE;
37
38 /* This API should exist back to Win95 and Windows CE. */
39 if (!GetSystemPowerStatus(&status)) {
40 /* !!! FIXME: push GetLastError() into SDL_GetError() */
41 *state = SDL_POWERSTATE_UNKNOWN;
42 } else if (status.BatteryFlag == 0xFF) { /* unknown state */
43 *state = SDL_POWERSTATE_UNKNOWN;
44 } else if (status.BatteryFlag & (1 << 7)) { /* no battery */
45 *state = SDL_POWERSTATE_NO_BATTERY;
46 } else if (status.BatteryFlag & (1 << 3)) { /* charging */
47 *state = SDL_POWERSTATE_CHARGING;
48 need_details = SDL_TRUE;
49 } else if (status.ACLineStatus == 1) {
50 *state = SDL_POWERSTATE_CHARGED; /* on AC, not charging. */
51 need_details = SDL_TRUE;
52 } else {
53 *state = SDL_POWERSTATE_ON_BATTERY; /* not on AC. */
54 need_details = SDL_TRUE;
55 }
56
57 *percent = -1;
58 *seconds = -1;
59 if (need_details) {
60 const int pct = (int) status.BatteryLifePercent;
61 const int secs = (int) status.BatteryLifeTime;
62
63 if (pct != 255) { /* 255 == unknown */
64 *percent = (pct > 100) ? 100 : pct; /* clamp between 0%, 100% */
65 }
66 if (secs != 0xFFFFFFFF) { /* ((DWORD)-1) == unknown */
67 *seconds = secs;
68 }
69 }
70
71 return SDL_TRUE; /* always the definitive answer on Windows. */
72 }
73
74 #endif /* SDL_POWER_WINDOWS */
75 #endif /* SDL_POWER_DISABLED */
76
77 /* vi: set ts=4 sw=4 expandtab: */
78