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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
      5  * except in compliance with the License. You may obtain a copy of the License at
      6  *
      7  *      http://www.apache.org/licenses/LICENSE-2.0
      8  *
      9  * Unless required by applicable law or agreed to in writing, software distributed under the
     10  * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     11  * KIND, either express or implied. See the License for the specific language governing
     12  * permissions and limitations under the License.
     13  */
     14 package com.android.settings.display;
     15 
     16 import android.content.Context;
     17 import android.os.IBinder;
     18 import android.os.Parcel;
     19 import android.os.RemoteException;
     20 import android.os.ServiceManager;
     21 import android.util.Log;
     22 
     23 import com.android.internal.annotations.VisibleForTesting;
     24 import com.android.internal.app.ColorDisplayController;
     25 import com.android.settings.R;
     26 import com.android.settings.core.BasePreferenceController;
     27 
     28 public class ColorModePreferenceController extends BasePreferenceController {
     29     private static final String TAG = "ColorModePreference";
     30     private static final String KEY_COLOR_MODE = "color_mode";
     31 
     32     private static final int SURFACE_FLINGER_TRANSACTION_QUERY_WIDE_COLOR = 1024;
     33 
     34     private final ConfigurationWrapper mConfigWrapper;
     35     private ColorDisplayController mColorDisplayController;
     36 
     37     public ColorModePreferenceController(Context context) {
     38         super(context, KEY_COLOR_MODE);
     39         mConfigWrapper = new ConfigurationWrapper();
     40     }
     41 
     42     @Override
     43     public int getAvailabilityStatus() {
     44         return mConfigWrapper.isScreenWideColorGamut()
     45                 && !getColorDisplayController().getAccessibilityTransformActivated() ?
     46                 AVAILABLE : DISABLED_FOR_USER;
     47     }
     48 
     49     @Override
     50     public CharSequence getSummary() {
     51         final int colorMode = getColorDisplayController().getColorMode();
     52         if (colorMode == ColorDisplayController.COLOR_MODE_AUTOMATIC) {
     53             return mContext.getText(R.string.color_mode_option_automatic);
     54         }
     55         if (colorMode == ColorDisplayController.COLOR_MODE_SATURATED) {
     56             return mContext.getText(R.string.color_mode_option_saturated);
     57         }
     58         if (colorMode == ColorDisplayController.COLOR_MODE_BOOSTED) {
     59             return mContext.getText(R.string.color_mode_option_boosted);
     60         }
     61         return mContext.getText(R.string.color_mode_option_natural);
     62     }
     63 
     64     @VisibleForTesting
     65     ColorDisplayController getColorDisplayController() {
     66         if (mColorDisplayController == null) {
     67             mColorDisplayController = new ColorDisplayController(mContext);
     68         }
     69         return mColorDisplayController;
     70     }
     71 
     72     @VisibleForTesting
     73     static class ConfigurationWrapper {
     74         private final IBinder mSurfaceFlinger;
     75 
     76         ConfigurationWrapper() {
     77             mSurfaceFlinger = ServiceManager.getService("SurfaceFlinger");
     78         }
     79 
     80         boolean isScreenWideColorGamut() {
     81             if (mSurfaceFlinger != null) {
     82                 final Parcel data = Parcel.obtain();
     83                 final Parcel reply = Parcel.obtain();
     84                 data.writeInterfaceToken("android.ui.ISurfaceComposer");
     85                 try {
     86                     mSurfaceFlinger.transact(SURFACE_FLINGER_TRANSACTION_QUERY_WIDE_COLOR,
     87                             data, reply, 0);
     88                     return reply.readBoolean();
     89                 } catch (RemoteException ex) {
     90                     Log.e(TAG, "Failed to query wide color support", ex);
     91                 } finally {
     92                     data.recycle();
     93                     reply.recycle();
     94                 }
     95             }
     96             return false;
     97         }
     98     }
     99 }
    100