diff --git a/cmhw/org/cyanogenmod/hardware/AdaptiveBacklight.java b/cmhw/org/cyanogenmod/hardware/AdaptiveBacklight.java new file mode 100644 index 00000000..9eeddf25 --- /dev/null +++ b/cmhw/org/cyanogenmod/hardware/AdaptiveBacklight.java @@ -0,0 +1,74 @@ +/* + * 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 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 = "/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); + + if(f.exists()) { + return true; + } else { + return false; + } + } + + /** + * 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 (Integer.parseInt(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"); + } + } +}