You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
72 lines
2.3 KiB
72 lines
2.3 KiB
/*
|
|
* Copyright (C) 2013 The CyanogenMod 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 org.cyanogenmod.hardware;
|
|
|
|
import org.cyanogenmod.hardware.util.FileUtils;
|
|
|
|
import android.os.SystemProperties;
|
|
import android.text.TextUtils;
|
|
|
|
import java.io.File;
|
|
|
|
/**
|
|
* Adaptive backlight support (this refers to technologies like NVIDIA SmartDimmer,
|
|
* QCOM CABL or Samsung CABC).
|
|
*/
|
|
public class AdaptiveBacklight {
|
|
|
|
private static String FILE_CABC = SystemProperties.get("ro.cm.hardware.cabc", "/sys/class/lcd/panel/power_reduce");
|
|
|
|
/**
|
|
* Whether device supports an adaptive backlight technology.
|
|
*
|
|
* @return boolean Supported devices must return always true
|
|
*/
|
|
public static boolean isSupported() {
|
|
File f = new File(FILE_CABC);
|
|
return f.exists();
|
|
}
|
|
|
|
/**
|
|
* This method return the current activation status of the adaptive backlight technology.
|
|
*
|
|
* @return boolean Must be false when adaptive backlight is not supported or not activated, or
|
|
* the operation failed while reading the status; true in any other case.
|
|
*/
|
|
public static boolean isEnabled() {
|
|
if (TextUtils.equals(FileUtils.readOneLine(FILE_CABC), "1")) {
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This method allows to setup adaptive backlight technology status.
|
|
*
|
|
* @param status The new adaptive backlight status
|
|
* @return boolean Must be false if adaptive backlight is not supported or the operation
|
|
* failed; true in any other case.
|
|
*/
|
|
public static boolean setEnabled(boolean status) {
|
|
if (status == true) {
|
|
return FileUtils.writeLine(FILE_CABC, "1");
|
|
} else {
|
|
return FileUtils.writeLine(FILE_CABC, "0");
|
|
}
|
|
}
|
|
}
|
|
|