| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file |
| * except in compliance with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software distributed under the |
| * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the specific language governing |
| * permissions and limitations under the License. |
| */ |
| package com.android.settings.display; |
| |
| import android.content.Context; |
| import android.os.IBinder; |
| import android.os.Parcel; |
| import android.os.RemoteException; |
| import android.os.ServiceManager; |
| import android.os.SystemProperties; |
| import android.support.v7.preference.Preference; |
| import android.support.v7.preference.TwoStatePreference; |
| import android.util.Log; |
| import com.android.internal.annotations.VisibleForTesting; |
| import com.android.settings.core.PreferenceControllerMixin; |
| import com.android.settingslib.core.AbstractPreferenceController; |
| |
| public class ColorModePreferenceController extends AbstractPreferenceController implements |
| PreferenceControllerMixin, Preference.OnPreferenceChangeListener { |
| private static final String TAG = "ColorModePreference"; |
| |
| private static final String KEY_COLOR_MODE = "color_mode"; |
| |
| @VisibleForTesting |
| static final float COLOR_SATURATION_DEFAULT = 1.0f; |
| @VisibleForTesting |
| static final float COLOR_SATURATION_VIVID = 1.1f; |
| |
| private static final int SURFACE_FLINGER_TRANSACTION_SATURATION = 1022; |
| @VisibleForTesting |
| static final String PERSISTENT_PROPERTY_SATURATION = "persist.sys.sf.color_saturation"; |
| |
| private final IBinder mSurfaceFlinger; |
| private final ConfigurationWrapper mConfigWrapper; |
| |
| public ColorModePreferenceController(Context context) { |
| super(context); |
| mSurfaceFlinger = ServiceManager.getService("SurfaceFlinger"); |
| mConfigWrapper = new ConfigurationWrapper(context); |
| } |
| |
| @Override |
| public String getPreferenceKey() { |
| return KEY_COLOR_MODE; |
| } |
| |
| @Override |
| public void updateState(Preference preference) { |
| TwoStatePreference colorMode = (TwoStatePreference) preference; |
| colorMode.setChecked(getSaturationValue() > 1.0f); |
| } |
| |
| @Override |
| public boolean isAvailable() { |
| return mConfigWrapper.isScreenWideColorGamut(); |
| } |
| |
| @Override |
| public boolean onPreferenceChange(Preference preference, Object newValue) { |
| float saturation = (boolean) newValue |
| ? COLOR_SATURATION_VIVID : COLOR_SATURATION_DEFAULT; |
| |
| SystemProperties.set(PERSISTENT_PROPERTY_SATURATION, Float.toString(saturation)); |
| applySaturation(saturation); |
| |
| return true; |
| } |
| |
| /** |
| * Propagates the provided saturation to the SurfaceFlinger. |
| */ |
| private void applySaturation(float saturation) { |
| if (mSurfaceFlinger != null) { |
| final Parcel data = Parcel.obtain(); |
| data.writeInterfaceToken("android.ui.ISurfaceComposer"); |
| data.writeFloat(saturation); |
| try { |
| mSurfaceFlinger.transact(SURFACE_FLINGER_TRANSACTION_SATURATION, data, null, 0); |
| } catch (RemoteException ex) { |
| Log.e(TAG, "Failed to set saturation", ex); |
| } finally { |
| data.recycle(); |
| } |
| } |
| } |
| |
| private static float getSaturationValue() { |
| try { |
| return Float.parseFloat(SystemProperties.get( |
| PERSISTENT_PROPERTY_SATURATION, Float.toString(COLOR_SATURATION_DEFAULT))); |
| } catch (NumberFormatException e) { |
| return COLOR_SATURATION_DEFAULT; |
| } |
| } |
| |
| @VisibleForTesting |
| static class ConfigurationWrapper { |
| private final Context mContext; |
| |
| ConfigurationWrapper(Context context) { |
| mContext = context; |
| } |
| |
| boolean isScreenWideColorGamut() { |
| return mContext.getResources().getConfiguration().isScreenWideColorGamut(); |
| } |
| } |
| } |