add Display Color Calibration cmhw

cmhw/org/cyanogenmod/hardware/DisplayColorCalibration.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2016 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 java.io.File;
+import java.util.Scanner;
+import org.cyanogenmod.hardware.util.FileUtils;
+
+public class DisplayColorCalibration {
+    private static final String COLOR_FILE = "/sys/devices/platform/mtk_disp_mgr.0/rgb";
+
+    public static boolean isSupported() {
+        File f = new File(COLOR_FILE);
+        return f.exists();
+    }
+
+    public static int getMaxValue()  {
+        return 2000;
+    }
+
+    public static int getMinValue()  {
+        return 0;
+    }
+
+    public static int getDefValue() {
+        return getMaxValue();
+    }
+
+    public static String getCurColors()  {
+        return FileUtils.readOneLine(COLOR_FILE);
+    }
+
+    public static boolean setColors(String colors) {
+        return FileUtils.writeLine(COLOR_FILE, colors);
+    }
+}