DivestOS/Patches/LineageOS-14.1/android_frameworks_base/0001-Reduced_Resolution.patch

From 56c76ff50e2c410aec349110c23b95556d0f2ade Mon Sep 17 00:00:00 2001
From: Tad <tad@spotco.us>
Date: Fri, 20 Oct 2017 18:57:18 -0400
Subject: [PATCH] Reduced Resolution Feature 2/2

Change-Id: If18913234f902410f87f8664f1017c83944544ee
---
 core/java/android/os/IPowerManager.aidl            |  2 +
 core/java/android/os/PowerManager.java             | 30 +++++++++
 .../android/server/power/PowerManagerService.java  | 72 ++++++++++++++++++++++
 3 files changed, 104 insertions(+)

diff --git a/core/java/android/os/IPowerManager.aidl b/core/java/android/os/IPowerManager.aidl
index 26eb7f169a0..38bd8a4e386 100644
--- a/core/java/android/os/IPowerManager.aidl
+++ b/core/java/android/os/IPowerManager.aidl
@@ -46,6 +46,8 @@ interface IPowerManager
     boolean isInteractive();
     boolean isPowerSaveMode();
     boolean setPowerSaveMode(boolean mode);
+    boolean isReducedResolution();
+    boolean setReducedResolution(boolean mode);
     boolean isDeviceIdleMode();
     boolean isLightDeviceIdleMode();
 
diff --git a/core/java/android/os/PowerManager.java b/core/java/android/os/PowerManager.java
index 5c8effec0ed..54dd5965373 100644
--- a/core/java/android/os/PowerManager.java
+++ b/core/java/android/os/PowerManager.java
@@ -988,6 +988,36 @@ public final class PowerManager {
         }
     }
 
+    /**
+     * Returns true if the WindowManager is running at a reduced resolution
+     *
+     * @return Returns true if WindowManager is set to a reduced resolution, else false.
+     */
+    public boolean isReducedResolution() {
+        try {
+            return mService.isReducedResolution();
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Set the reduced resolution mode
+     *
+     * @return True if the set was allowed.
+     *
+     * @see #isReducedResolution()
+     *
+     * @hide
+     */
+    public boolean setReducedResolution(boolean mode) {
+        try {
+            return mService.setReducedResolution(mode);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
     /**
      * Returns true if the device is currently in idle mode.  This happens when a device
      * has been sitting unused and unmoving for a sufficiently long period of time, so that
diff --git a/services/core/java/com/android/server/power/PowerManagerService.java b/services/core/java/com/android/server/power/PowerManagerService.java
index 55d0809ee4e..668176dc761 100644
--- a/services/core/java/com/android/server/power/PowerManagerService.java
+++ b/services/core/java/com/android/server/power/PowerManagerService.java
@@ -29,6 +29,7 @@ import android.content.IntentFilter;
 import android.content.pm.PackageManager;
 import android.content.res.Resources;
 import android.database.ContentObserver;
+import android.graphics.Point;
 import android.hardware.Sensor;
 import android.hardware.SensorEvent;
 import android.hardware.SensorEventListener;
@@ -67,6 +68,7 @@ import android.util.Slog;
 import android.util.SparseIntArray;
 import android.util.TimeUtils;
 import android.view.Display;
+import android.view.IWindowManager;
 import android.view.WindowManagerPolicy;
 
 import com.android.internal.app.IAppOpsService;
@@ -203,6 +205,7 @@ public final class PowerManagerService extends SystemService
     private final Context mContext;
     private final ServiceThread mHandlerThread;
     private final PowerManagerHandler mHandler;
+    private final IWindowManager mWm;
 
     private LightsManager mLightsManager;
     private BatteryManagerInternal mBatteryManagerInternal;
@@ -583,6 +586,8 @@ public final class PowerManagerService extends SystemService
                 Process.THREAD_PRIORITY_DISPLAY, false /*allowIo*/);
         mHandlerThread.start();
         mHandler = new PowerManagerHandler(mHandlerThread.getLooper());
+        mWm = IWindowManager.Stub.asInterface(ServiceManager.checkService(
+                        Context.WINDOW_SERVICE));
         qcNsrmPowExt = new QCNsrmPowerExtension(this);
         synchronized (mLock) {
             mWakeLockSuspendBlocker = createSuspendBlockerLocked("PowerManagerService.WakeLocks");
@@ -2658,6 +2663,46 @@ public final class PowerManagerService extends SystemService
         }
     }
 
+    private boolean isReducedResolutionInternal() {
+        synchronized (mLock) {
+            Point initialSize = new Point();
+            Point baseSize = new Point();
+
+            mWm.getInitialDisplaySize(Display.DEFAULT_DISPLAY, initialSize);
+            mWm.getBaseDisplaySize(Display.DEFAULT_DISPLAY, baseSize);
+
+            return !initialSize.equals(baseSize);
+        }
+    }
+
+    private boolean isLowPowerModeInternal(boolean mode) {
+        synchronized (mLock) {
+            if (mode) {
+                Point initialSize = new Point();
+                mWm.getInitialDisplaySize(Display.DEFAULT_DISPLAY, initialSize);
+
+                Point newSize;
+
+                if (initialSize.x == 1440 && initialSize.y == 2560) {//16:9
+                    newSize = new Point(1080, 1920);//.75
+                } else if(initialSize.x == 1200 && initialSize.y == 1920) {//16:10
+                    newSize = new Point(900, 1440);//.75
+                } else if(initialSize.x == 1080 && initialSize.y == 1920) {//16:9
+                    newSize = new Point(720, 1280);//.50
+                } else if(initialSize.x == 768 && initialSize.y == 1280) {//5:3
+                    newSize = new Point(576, 960);//.75
+                } else {
+                    return false;
+                }
+
+                mWm.setForcedDisplaySize(Display.DEFAULT_DISPLAY, newSize.x, newSize.y);
+            } else {
+                mWm.clearForcedDisplaySize(Display.DEFAULT_DISPLAY);
+            }
+            return isReducedResolutionInternal();
+        }
+    }
+
     boolean isDeviceIdleModeInternal() {
         synchronized (mLock) {
             return mDeviceIdleMode;
@@ -3833,6 +3878,28 @@ public final class PowerManagerService extends SystemService
             }
         }
 
+        @Override // Binder call
+        public boolean isReducedResolutionMode() {
+            final long ident = Binder.clearCallingIdentity();
+            try {
+                return isReducedResolutionInternal();
+            } finally {
+                Binder.restoreCallingIdentity(ident);
+            }
+        }
+
+        @Override // Binder call
+        public boolean setReducedResolutionode(boolean mode) {
+            mContext.enforceCallingOrSelfPermission(
+                    android.Manifest.permission.DEVICE_POWER, null);
+            final long ident = Binder.clearCallingIdentity();
+            try {
+                return setReducedResolutionInternal(mode);
+            } finally {
+                Binder.restoreCallingIdentity(ident);
+            }
+        }
+
         @Override // Binder call
         public boolean isDeviceIdleMode() {
             final long ident = Binder.clearCallingIdentity();
@@ -4214,6 +4281,11 @@ public final class PowerManagerService extends SystemService
             return setLowPowerModeInternal(mode);
         }
 
+        @Override
+        public boolean setReducedResolution(boolean mode) {
+            return setReducedResolutionInternal(mode);
+        }
+
         @Override
         public int getFeature(int featureId) {
             return nativeGetFeature(featureId);
-- 
2.14.2