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authorDaniel Hillenbrand <codeworkx@cyanogenmod.org>2013-08-21 21:25:54 +0200
committerDaniel Hillenbrand <codeworkx@cyanogenmod.org>2013-08-21 21:27:44 +0200
commit3f99f35acdd780f4dbd5771c8602ddd9c0ed691f (patch)
tree3e5497525ff139f3194481640fd582957602dcb9 /cmhw
parent731cd20c21959f0b997f3f69c1bcdf879d246391 (diff)
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samsung: hardware: add support for adaptive backlight
Change-Id: I59b798e9cac2cf2c6efbe31736d3361f05c81398
Diffstat (limited to 'cmhw')
-rw-r--r--cmhw/org/cyanogenmod/hardware/AdaptiveBacklight.java74
1 files changed, 74 insertions, 0 deletions
diff --git a/cmhw/org/cyanogenmod/hardware/AdaptiveBacklight.java b/cmhw/org/cyanogenmod/hardware/AdaptiveBacklight.java
new file mode 100644
index 0000000..9eeddf2
--- /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");
+ }
+ }
+}