cscg22-gearboy

CSCG 2022 Challenge 'Gearboy'
git clone https://git.sinitax.com/sinitax/cscg22-gearboy
Log | Files | Refs | sfeed.txt

SDL_syspower.m (3241B)

      1/*
      2  Simple DirectMedia Layer
      3  Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
      4
      5  This software is provided 'as-is', without any express or implied
      6  warranty.  In no event will the authors be held liable for any damages
      7  arising from the use of this software.
      8
      9  Permission is granted to anyone to use this software for any purpose,
     10  including commercial applications, and to alter it and redistribute it
     11  freely, subject to the following restrictions:
     12
     13  1. The origin of this software must not be misrepresented; you must not
     14     claim that you wrote the original software. If you use this software
     15     in a product, an acknowledgment in the product documentation would be
     16     appreciated but is not required.
     17  2. Altered source versions must be plainly marked as such, and must not be
     18     misrepresented as being the original software.
     19  3. This notice may not be removed or altered from any source distribution.
     20*/
     21#include "../../SDL_internal.h"
     22
     23#ifndef SDL_POWER_DISABLED
     24#if SDL_POWER_UIKIT
     25
     26#import <UIKit/UIKit.h>
     27
     28#include "SDL_power.h"
     29#include "SDL_timer.h"
     30#include "SDL_assert.h"
     31#include "SDL_syspower.h"
     32
     33/* turn off the battery monitor if it's been more than X ms since last check. */
     34static const int BATTERY_MONITORING_TIMEOUT = 3000;
     35static Uint32 SDL_UIKitLastPowerInfoQuery = 0;
     36
     37void
     38SDL_UIKit_UpdateBatteryMonitoring(void)
     39{
     40    if (SDL_UIKitLastPowerInfoQuery) {
     41        if (SDL_TICKS_PASSED(SDL_GetTicks(), SDL_UIKitLastPowerInfoQuery + BATTERY_MONITORING_TIMEOUT)) {
     42            UIDevice *uidev = [UIDevice currentDevice];
     43            SDL_assert([uidev isBatteryMonitoringEnabled] == YES);
     44            [uidev setBatteryMonitoringEnabled:NO];
     45            SDL_UIKitLastPowerInfoQuery = 0;
     46        }
     47    }
     48}
     49
     50SDL_bool
     51SDL_GetPowerInfo_UIKit(SDL_PowerState * state, int *seconds, int *percent)
     52{
     53    UIDevice *uidev = [UIDevice currentDevice];
     54
     55    if (!SDL_UIKitLastPowerInfoQuery) {
     56        SDL_assert([uidev isBatteryMonitoringEnabled] == NO);
     57        [uidev setBatteryMonitoringEnabled:YES];
     58    }
     59
     60    /* UIKit_GL_SwapWindow() (etc) will check this and disable the battery
     61     *  monitoring if the app hasn't queried it in the last X seconds.
     62     *  Apparently monitoring the battery burns battery life.  :)
     63     *  Apple's docs say not to monitor the battery unless you need it.
     64     */
     65    SDL_UIKitLastPowerInfoQuery = SDL_GetTicks();
     66
     67    *seconds = -1;   /* no API to estimate this in UIKit. */
     68
     69    switch ([uidev batteryState])
     70    {
     71        case UIDeviceBatteryStateCharging:
     72            *state = SDL_POWERSTATE_CHARGING;
     73            break;
     74
     75        case UIDeviceBatteryStateFull:
     76            *state = SDL_POWERSTATE_CHARGED;
     77            break;
     78
     79        case UIDeviceBatteryStateUnplugged:
     80            *state = SDL_POWERSTATE_ON_BATTERY;
     81            break;
     82
     83        case UIDeviceBatteryStateUnknown:
     84        default:
     85            *state = SDL_POWERSTATE_UNKNOWN;
     86            break;
     87    }
     88
     89    const float level = [uidev batteryLevel];
     90    *percent = ( (level < 0.0f) ? -1 : ((int) ((level * 100) + 0.5f)) );
     91    return SDL_TRUE;            /* always the definitive answer on iOS. */
     92}
     93
     94#endif /* SDL_POWER_UIKIT */
     95#endif /* SDL_POWER_DISABLED */
     96
     97/* vi: set ts=4 sw=4 expandtab: */