Add Device Power State (Windows, Linux, Mac and Android) (#197)

Uses native power state methods to display battery percentage and charging state correctly. Mainly for qlaunch.
Tested on Windows, Linux. Mac and Android

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/197
Co-authored-by: Maufeat <sahyno1996@gmail.com>
Co-committed-by: Maufeat <sahyno1996@gmail.com>

src/android/app/src/main/java/org/yuzu/yuzu_emu/NativeLibrary.kt

@@ -1,9 +1,9 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
-// SPDX-FileCopyrightText: 2025 Eden Emulator Project
-// SPDX-License-Identifier: GPL-3.0-or-later
-
 
 package org.yuzu.yuzu_emu
 
@@ -489,4 +489,9 @@ object NativeLibrary {
      * Checks if all necessary keys are present for decryption
      */
     external fun areKeysPresent(): Boolean
+
+    /**
+     * Updates the device power state to global variables
+     */
+    external fun updatePowerState(percentage: Int, isCharging: Boolean, hasBattery: Boolean)
 }

src/android/app/src/main/java/org/yuzu/yuzu_emu/YuzuApplication.kt

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -13,6 +16,7 @@ import org.yuzu.yuzu_emu.utils.DirectoryInitialization
 import org.yuzu.yuzu_emu.utils.DocumentsTree
 import org.yuzu.yuzu_emu.utils.GpuDriverHelper
 import org.yuzu.yuzu_emu.utils.Log
+import org.yuzu.yuzu_emu.utils.PowerStateUpdater
 
 fun Context.getPublicFilesDir(): File = getExternalFilesDir(null) ?: filesDir
 
@@ -40,6 +44,7 @@ class YuzuApplication : Application() {
         GpuDriverHelper.initializeDriverParameters()
         NativeInput.reloadInputDevices()
         NativeLibrary.logDeviceInfo()
+        PowerStateUpdater.start()
         Log.logDeviceInfo()
 
         createNotificationChannels()

src/android/app/src/main/java/org/yuzu/yuzu_emu/activities/EmulationActivity.kt

@@ -1,9 +1,9 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
-// SPDX-FileCopyrightText: 2025 Eden Emulator Project
-// SPDX-License-Identifier: GPL-3.0-or-later
-
 
 package org.yuzu.yuzu_emu.activities
 
@@ -58,6 +58,7 @@ import org.yuzu.yuzu_emu.utils.NativeConfig
 import org.yuzu.yuzu_emu.utils.NfcReader
 import org.yuzu.yuzu_emu.utils.ParamPackage
 import org.yuzu.yuzu_emu.utils.ThemeHelper
+import org.yuzu.yuzu_emu.utils.PowerStateUtils
 import java.text.NumberFormat
 import kotlin.math.roundToInt
 

src/android/app/src/main/java/org/yuzu/yuzu_emu/utils/PowerStateUpdater.kt

@@ -0,0 +1,46 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+
+package org.yuzu.yuzu_emu.utils
+
+import android.os.Handler
+import android.os.Looper
+import org.yuzu.yuzu_emu.NativeLibrary
+import org.yuzu.yuzu_emu.YuzuApplication
+
+object PowerStateUpdater {
+
+    private lateinit var handler: Handler
+    private lateinit var runnable: Runnable
+    private const val UPDATE_INTERVAL_MS = 1000L
+    private var isStarted = false
+
+    fun start() {
+
+        if (isStarted) {
+            return
+        }
+
+        val context = YuzuApplication.appContext
+
+        handler = Handler(Looper.getMainLooper())
+        runnable = Runnable {
+            val info = PowerStateUtils.getBatteryInfo(context)
+            NativeLibrary.updatePowerState(info[0], info[1] == 1, info[2] == 1)
+            handler.postDelayed(runnable, UPDATE_INTERVAL_MS)
+        }
+        handler.post(runnable)
+        isStarted = true
+    }
+
+    fun stop() {
+        if (!isStarted) {
+            return
+        }
+        if (::handler.isInitialized) {
+            handler.removeCallbacks(runnable)
+        }
+        isStarted = false
+    }
+}

src/android/app/src/main/java/org/yuzu/yuzu_emu/utils/PowerStateUtils.kt

@@ -0,0 +1,45 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package org.yuzu.yuzu_emu.utils
+
+import android.content.Context
+import android.content.Intent
+import android.content.IntentFilter
+import android.os.BatteryManager
+import android.os.Build
+
+object PowerStateUtils {
+
+    @JvmStatic
+    fun getBatteryInfo(context: Context?): IntArray {
+
+        if (context == null) {
+            return intArrayOf(0, 0, 0) // Percentage, IsCharging, HasBattery
+        }
+
+        val results = intArrayOf(100, 0, 1)
+        val iFilter = IntentFilter(Intent.ACTION_BATTERY_CHANGED)
+        val batteryStatusIntent: Intent? = context.registerReceiver(null, iFilter)
+
+        if (batteryStatusIntent != null) {
+            val present = batteryStatusIntent.getBooleanExtra(BatteryManager.EXTRA_PRESENT, true)
+            if (!present) {
+                results[2] = 0; results[0] = 0; results[1] = 0; return results
+            }
+            results[2] = 1
+            val level = batteryStatusIntent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1)
+            val scale = batteryStatusIntent.getIntExtra(BatteryManager.EXTRA_SCALE, -1)
+            if (level != -1 && scale != -1 && scale != 0) {
+                results[0] = (level.toFloat() / scale.toFloat() * 100.0f).toInt()
+            } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+                val bm = context.getSystemService(Context.BATTERY_SERVICE) as BatteryManager?
+                results[0] = bm?.getIntProperty(BatteryManager.BATTERY_PROPERTY_CAPACITY) ?: 100
+            }
+            val status = batteryStatusIntent.getIntExtra(BatteryManager.EXTRA_STATUS, -1)
+            results[1] = if (status == BatteryManager.BATTERY_STATUS_CHARGING || status == BatteryManager.BATTERY_STATUS_FULL) 1 else 0
+        }
+
+        return results
+    }
+}

src/android/app/src/main/jni/native.cpp

@@ -1,9 +1,9 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
-// SPDX-FileCopyrightText: 2025 Eden Emulator Project
-// SPDX-License-Identifier: GPL-3.0-or-later
-
 
 #include <codecvt>
 #include <locale>
@@ -79,6 +79,11 @@ static EmulationSession s_instance;
 std::unique_ptr<AndroidMultiplayer> multiplayer{nullptr};
 std::shared_ptr<Core::AnnounceMultiplayerSession> announce_multiplayer_session;
 
+//Power Status default values
+std::atomic<int> g_battery_percentage = {100};
+std::atomic<bool> g_is_charging = {false};
+std::atomic<bool> g_has_battery = {true};
+
 EmulationSession::EmulationSession() {
     m_vfs = std::make_shared<FileSys::RealVfsFilesystem>();
 }
@@ -1014,4 +1019,16 @@ JNIEXPORT void JNICALL Java_org_yuzu_yuzu_1emu_network_NetPlayManager_netPlayUnb
         JNIEnv* env, [[maybe_unused]] jobject obj, jstring username) {
     multiplayer->NetPlayUnbanUser(Common::Android::GetJString(env, username));
 }
+
+JNIEXPORT void JNICALL Java_org_yuzu_yuzu_1emu_NativeLibrary_updatePowerState(
+        JNIEnv* env,
+        jobject,
+        jint percentage,
+        jboolean isCharging,
+        jboolean hasBattery) {
+
+    g_battery_percentage.store(percentage, std::memory_order_relaxed);
+    g_is_charging.store(isCharging, std::memory_order_relaxed);
+    g_has_battery.store(hasBattery, std::memory_order_relaxed);
+}
 } // extern "C"

src/common/CMakeLists.txt

@@ -42,6 +42,8 @@ add_library(common STATIC
     demangle.h
     detached_tasks.cpp
     detached_tasks.h
+    device_power_state.cpp
+    device_power_state.h
     div_ceil.h
     dynamic_library.cpp
     dynamic_library.h

src/common/device_power_state.cpp

@@ -0,0 +1,102 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "device_power_state.h"
+
+#if defined(_WIN32)
+#include <windows.h>
+
+#elif defined(__ANDROID__)
+#include <atomic>
+extern std::atomic<int> g_battery_percentage;
+extern std::atomic<bool> g_is_charging;
+extern std::atomic<bool> g_has_battery;
+
+#elif defined(__APPLE__)
+#include <TargetConditionals.h>
+#if TARGET_OS_MAC
+#include <IOKit/ps/IOPSKeys.h>
+#include <IOKit/ps/IOPowerSources.h>
+#endif
+
+#elif defined(__linux__)
+#include <fstream>
+#include <string>
+#include <dirent.h>
+#endif
+
+namespace Common {
+
+    PowerStatus GetPowerStatus()
+    {
+        PowerStatus info;
+
+#if defined(_WIN32)
+        SYSTEM_POWER_STATUS status;
+        if (GetSystemPowerStatus(&status)) {
+            if (status.BatteryFlag == 128) {
+                info.has_battery = false;
+            } else {
+                info.percentage = status.BatteryLifePercent;
+                info.charging = (status.BatteryFlag & 8) != 0;
+            }
+        } else {
+            info.has_battery = false;
+        }
+
+#elif defined(__ANDROID__)
+        info.percentage = g_battery_percentage.load(std::memory_order_relaxed);
+        info.charging = g_is_charging.load(std::memory_order_relaxed);
+        info.has_battery = g_has_battery.load(std::memory_order_relaxed);
+
+#elif defined(__APPLE__) && TARGET_OS_MAC
+        CFTypeRef info_ref = IOPSCopyPowerSourcesInfo();
+        CFArrayRef sources = IOPSCopyPowerSourcesList(info_ref);
+        if (CFArrayGetCount(sources) > 0) {
+            CFDictionaryRef battery =
+                IOPSGetPowerSourceDescription(info_ref, CFArrayGetValueAtIndex(sources, 0));
+
+            CFNumberRef curNum =
+                (CFNumberRef)CFDictionaryGetValue(battery, CFSTR(kIOPSCurrentCapacityKey));
+            CFNumberRef maxNum =
+                (CFNumberRef)CFDictionaryGetValue(battery, CFSTR(kIOPSMaxCapacityKey));
+            int cur = 0, max = 0;
+            CFNumberGetValue(curNum, kCFNumberIntType, &cur);
+            CFNumberGetValue(maxNum, kCFNumberIntType, &max);
+
+            if (max > 0)
+                info.percentage = (cur * 100) / max;
+
+            CFBooleanRef isCharging =
+                (CFBooleanRef)CFDictionaryGetValue(battery, CFSTR(kIOPSIsChargingKey));
+            info.charging = CFBooleanGetValue(isCharging);
+        } else {
+            info.has_battery = false;
+        }
+        CFRelease(sources);
+        CFRelease(info_ref);
+
+#elif defined(__linux__)
+        const char* battery_path = "/sys/class/power_supply/BAT0/";
+
+        std::ifstream capFile(std::string(battery_path) + "capacity");
+        if (capFile) {
+            capFile >> info.percentage;
+        }
+        else {
+            info.has_battery = false;
+        }
+
+        std::ifstream statFile(std::string(battery_path) + "status");
+        if (statFile) {
+            std::string status;
+            std::getline(statFile, status);
+            info.charging = (status == "Charging");
+        }
+#else
+        info.has_battery = false;
+#endif
+
+        return info;
+    }
+}

src/common/device_power_state.h

@@ -0,0 +1,14 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+namespace Common {
+struct PowerStatus {
+    int percentage = -1;
+    bool charging = false;
+    bool has_battery = true;
+};
+
+PowerStatus GetPowerStatus();
+} // namespace Common

src/core/hle/service/ptm/psm.cpp

@@ -1,8 +1,12 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <memory>
 
+#include "common/device_power_state.h"
 #include "common/logging/log.h"
 #include "core/core.h"
 #include "core/hle/kernel/k_event.h"
@@ -148,17 +152,31 @@ PSM::~PSM() = default;
 void PSM::GetBatteryChargePercentage(HLERequestContext& ctx) {
     LOG_DEBUG(Service_PTM, "called");
 
+    u32 percentage = 100;
+
+    Common::PowerStatus power_status = Common::GetPowerStatus();
+
+    if (power_status.has_battery && power_status.percentage >= 0) {
+        percentage = static_cast<u32>(power_status.percentage);
+    }
+
     IPC::ResponseBuilder rb{ctx, 3};
     rb.Push(ResultSuccess);
-    rb.Push<u32>(battery_charge_percentage);
+    rb.Push<u32>(percentage);
 }
 
 void PSM::GetChargerType(HLERequestContext& ctx) {
     LOG_DEBUG(Service_PTM, "called");
 
+    ChargerType charger = ChargerType::Unplugged;
+    Common::PowerStatus power_status = Common::GetPowerStatus();
+    if (power_status.has_battery && power_status.charging) {
+        charger = ChargerType::RegularCharger;
+    }
+
     IPC::ResponseBuilder rb{ctx, 3};
     rb.Push(ResultSuccess);
-    rb.PushEnum(charger_type);
+    rb.PushEnum(charger);
 }
 
 void PSM::OpenSession(HLERequestContext& ctx) {

src/core/hle/service/ptm/psm.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -23,9 +26,6 @@ private:
     void GetBatteryChargePercentage(HLERequestContext& ctx);
     void GetChargerType(HLERequestContext& ctx);
     void OpenSession(HLERequestContext& ctx);
-
-    u32 battery_charge_percentage{100};
-    ChargerType charger_type{ChargerType::RegularCharger};
 };
 
 } // namespace Service::PTM