kc3-lang/SDL/src/power/n3ds/SDL_syspower.c

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• Hash : 65527537
  Author :
  Date : 2021-03-30T04:32:39
  

  N3DS port (squashed) A dedicated renderer using Citro3D would likely allow for better much better graphical performances.

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• src/power/n3ds/SDL_syspower.c

• /*
    Simple DirectMedia Layer
    Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
  
    This software is provided 'as-is', without any express or implied
    warranty.  In no event will the authors be held liable for any damages
    arising from the use of this software.
  
    Permission is granted to anyone to use this software for any purpose,
    including commercial applications, and to alter it and redistribute it
    freely, subject to the following restrictions:
  
    1. The origin of this software must not be misrepresented; you must not
       claim that you wrote the original software. If you use this software
       in a product, an acknowledgment in the product documentation would be
       appreciated but is not required.
    2. Altered source versions must be plainly marked as such, and must not be
       misrepresented as being the original software.
    3. This notice may not be removed or altered from any source distribution.
  */
  
  #include "../../SDL_internal.h"
  
  #if !defined(SDL_POWER_DISABLED) && defined(SDL_POWER_N3DS)
  
  #include <3ds.h>
  
  #include "SDL_error.h"
  #include "SDL_power.h"
  
  SDL_FORCE_INLINE SDL_PowerState GetPowerState(void);
  SDL_FORCE_INLINE int ReadStateFromPTMU(bool *is_plugged, u8 *is_charging);
  SDL_FORCE_INLINE int GetBatteryPercentage(void);
  
  #define BATTERY_PERCENT_REG      0xB
  #define BATTERY_PERCENT_REG_SIZE 2
  
  SDL_bool
  SDL_GetPowerInfo_N3DS(SDL_PowerState *state, int *seconds, int *percent)
  {
      *state = GetPowerState();
      *percent = GetBatteryPercentage();
      *seconds = -1; /* libctru doesn't provide a way to estimate battery life */
  
      return SDL_TRUE;
  }
  
  SDL_FORCE_INLINE SDL_PowerState
  GetPowerState(void)
  {
      bool is_plugged;
      u8 is_charging;
  
      if (ReadStateFromPTMU(&is_plugged, &is_charging) < 0) {
          return SDL_POWERSTATE_UNKNOWN;
      }
  
      if (is_charging) {
          return SDL_POWERSTATE_CHARGING;
      }
  
      if (is_plugged) {
          return SDL_POWERSTATE_CHARGED;
      }
  
      return SDL_POWERSTATE_ON_BATTERY;
  }
  
  SDL_FORCE_INLINE int
  ReadStateFromPTMU(bool *is_plugged, u8 *is_charging)
  {
      if (R_FAILED(ptmuInit())) {
          return SDL_SetError("Failed to initialise PTMU service");
      }
  
      if (R_FAILED(PTMU_GetAdapterState(is_plugged))) {
          ptmuExit();
          return SDL_SetError("Failed to read adapter state");
      }
  
      if (R_FAILED(PTMU_GetBatteryChargeState(is_charging))) {
          ptmuExit();
          return SDL_SetError("Failed to read battery charge state");
      }
  
      ptmuExit();
      return 0;
  }
  
  SDL_FORCE_INLINE int
  GetBatteryPercentage(void)
  {
      u8 data[BATTERY_PERCENT_REG_SIZE];
  
      if (R_FAILED(mcuHwcInit())) {
          return SDL_SetError("Failed to initialise mcuHwc service");
      }
  
      if (R_FAILED(MCUHWC_ReadRegister(BATTERY_PERCENT_REG, data, BATTERY_PERCENT_REG_SIZE))) {
          mcuHwcExit();
          return SDL_SetError("Failed to read battery register");
      }
  
      mcuHwcExit();
  
      return (int) SDL_round(data[0] + data[1] / 256.0);
  }
  
  #endif /* !SDL_POWER_DISABLED && SDL_POWER_N3DS */
  
  /* vi: set sts=4 ts=4 sw=4 expandtab: */
  

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