90 lines
3.0 KiB
Java
90 lines
3.0 KiB
Java
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/*
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* Copyright (C) 2016 The CyanogenMod Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.lineageos.hardware;
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import org.lineageos.internal.util.FileUtils;
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/**
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* Sunlight Readability Enhancement support, aka Facemelt Mode.
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*
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* Brightens up the screen via image processing or other tricks when
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* under aggressive lighting conditions. Usually depends on CABC
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* support.
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*/
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public class SunlightEnhancement {
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private static final String FILE_SRE = "/sys/class/mdnie/mdnie/outdoor";
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private static final String FILE_HBM = "/sys/class/lcd/panel/panel/auto_brightness";
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/**
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* Whether device supports SRE
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*
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* @return boolean Supported devices must return always true
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*/
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public static boolean isSupported() {
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return FileUtils.isFileWritable(FILE_SRE) &&
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FileUtils.isFileReadable(FILE_SRE) &&
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FileUtils.isFileWritable(FILE_HBM) &&
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FileUtils.isFileReadable(FILE_HBM);
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}
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/**
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* This method return the current activation status of SRE
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*
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* @return boolean Must be false when SRE is not supported or not activated, or
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* the operation failed while reading the status; true in any other case.
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*/
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public static boolean isEnabled() {
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return "1".equals(FileUtils.readOneLine(FILE_SRE)) &&
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"6".equals(FileUtils.readOneLine(FILE_HBM));
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}
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/**
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* This method allows to setup SRE.
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*
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* @param status The new SRE status
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* @return boolean Must be false if SRE is not supported or the operation
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* failed; true in any other case.
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*/
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public static boolean setEnabled(boolean status) {
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return FileUtils.writeLine(FILE_SRE, status ? "1" : "0") &&
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FileUtils.writeLine(FILE_HBM, status ? "6" : "0");
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}
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/**
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* Whether adaptive backlight (CABL / CABC) is required to be enabled
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*
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* @return boolean false if adaptive backlight is not a dependency
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*/
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public static boolean isAdaptiveBacklightRequired() {
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return false;
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}
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/**
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* Set this to true if the implementation is self-managed and does
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* it's own ambient sensing. In this case, setEnabled is assumed
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* to toggle the feature on or off, but not activate it. If set
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* to false, LiveDisplay will call setEnabled when the ambient lux
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* threshold is crossed.
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*
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* @return true if this enhancement is self-managed
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*/
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public static boolean isSelfManaged() {
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return false;
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}
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}
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