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Implemented SDL power APIs for iPhoneOS.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| /* | ||
| SDL - Simple DirectMedia Layer | ||
| Copyright (C) 1997-2010 Sam Lantinga | ||
| This library 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 library 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 St, Fifth Floor, Boston, MA 02110-1301 USA | ||
| Sam Lantinga | ||
| slouken@libsdl.org | ||
| */ | ||
| #include "SDL_config.h" | ||
|
|
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| #ifndef SDL_POWER_DISABLED | ||
| #ifdef SDL_POWER_UIKIT | ||
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| #import <UIKit/UIKit.h> | ||
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| #include "SDL_power.h" | ||
| #include "SDL_timer.h" | ||
| #include "SDL_assert.h" | ||
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| // turn off the battery monitor if it's been more than X ms since last check. | ||
| static const int BATTERY_MONITORING_TIMEOUT = 3000; | ||
| static Uint32 SDL_UIKitLastPowerInfoQuery = 0; | ||
|
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||
| void | ||
| SDL_UIKit_UpdateBatteryMonitoring(void) | ||
| { | ||
| if (SDL_UIKitLastPowerInfoQuery) { | ||
| const Uint32 prev = SDL_UIKitLastPowerInfoQuery; | ||
| const UInt32 now = SDL_GetTicks(); | ||
| const UInt32 ticks = now - prev; | ||
| // if timer wrapped (now < prev), shut down, too. | ||
| if ((now < prev) || (ticks >= BATTERY_MONITORING_TIMEOUT)) { | ||
| UIDevice *uidev = [UIDevice currentDevice]; | ||
| SDL_assert([uidev isBatteryMonitoringEnabled] == YES); | ||
| [uidev setBatteryMonitoringEnabled:NO]; | ||
| SDL_UIKitLastPowerInfoQuery = 0; | ||
| } | ||
| } | ||
| } | ||
|
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| SDL_bool | ||
| SDL_GetPowerInfo_UIKit(SDL_PowerState * state, int *seconds, int *percent) | ||
| { | ||
| UIDevice *uidev = [UIDevice currentDevice]; | ||
|
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| if (!SDL_UIKitLastPowerInfoQuery) { | ||
| SDL_assert([uidev isBatteryMonitoringEnabled] == NO); | ||
| [uidev setBatteryMonitoringEnabled:YES]; | ||
| } | ||
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| // UIKit_GL_SwapWindow() (etc) will check this and disable the battery | ||
| // monitoring if the app hasn't queried it in the last X seconds. | ||
| // Apparently monitoring the battery burns battery life. :) | ||
| // Apple's docs say not to monitor the battery unless you need it. | ||
| SDL_UIKitLastPowerInfoQuery = SDL_GetTicks(); | ||
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| *seconds = -1; // no API to estimate this in UIKit. | ||
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| switch ([uidev batteryState]) | ||
| { | ||
| case UIDeviceBatteryStateCharging: | ||
| *state = SDL_POWERSTATE_CHARGING; | ||
| break; | ||
|
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| case UIDeviceBatteryStateFull: | ||
| *state = SDL_POWERSTATE_CHARGED; | ||
| break; | ||
|
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| case UIDeviceBatteryStateUnplugged: | ||
| *state = SDL_POWERSTATE_ON_BATTERY; | ||
| break; | ||
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| case UIDeviceBatteryStateUnknown: | ||
| default: | ||
| *state = SDL_POWERSTATE_UNKNOWN; | ||
| break; | ||
| } | ||
|
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| const float level = [uidev batteryLevel]; | ||
| *percent = ( (level < 0.0f) ? -1 : (((int) (level + 0.5f)) * 100) ); | ||
| return SDL_TRUE; /* always the definitive answer on iPhoneOS. */ | ||
| } | ||
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| #endif /* SDL_POWER_UIKIT */ | ||
| #endif /* SDL_POWER_DISABLED */ | ||
|
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| /* vi: set ts=4 sw=4 expandtab: */ |
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