1 /* 2 * Copyright (C) 2023 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.server.display.brightness.clamper; 18 19 import android.hardware.display.DisplayManagerInternal; 20 import android.os.PowerManager; 21 import android.util.IndentingPrintWriter; 22 23 import com.android.server.display.brightness.BrightnessReason; 24 25 import java.io.PrintWriter; 26 27 class BrightnessLowPowerModeModifier extends BrightnessModifier { 28 29 @Override shouldApply(DisplayManagerInternal.DisplayPowerRequest request)30 boolean shouldApply(DisplayManagerInternal.DisplayPowerRequest request) { 31 return request.lowPowerMode; 32 } 33 34 35 @Override getBrightnessAdjusted(float currentBrightness, DisplayManagerInternal.DisplayPowerRequest request)36 float getBrightnessAdjusted(float currentBrightness, 37 DisplayManagerInternal.DisplayPowerRequest request) { 38 final float brightnessFactor = 39 Math.min(request.screenLowPowerBrightnessFactor, 1); 40 return Math.max((currentBrightness * brightnessFactor), PowerManager.BRIGHTNESS_MIN); 41 } 42 43 @Override getModifier()44 int getModifier() { 45 return BrightnessReason.MODIFIER_LOW_POWER; 46 } 47 48 @Override dump(PrintWriter pw)49 public void dump(PrintWriter pw) { 50 pw.println("BrightnessLowPowerModeModifier:"); 51 IndentingPrintWriter ipw = new IndentingPrintWriter(pw, " "); 52 super.dump(ipw); 53 } 54 55 @Override shouldListenToLightSensor()56 public boolean shouldListenToLightSensor() { 57 return false; 58 } 59 60 @Override setAmbientLux(float lux)61 public void setAmbientLux(float lux) { 62 // unused 63 } 64 } 65