1 files changed, 79 insertions, 0 deletions
diff --git a/cmhw/org/cyanogenmod/hardware/DisplayGammaCalibration.java b/cmhw/org/cyanogenmod/hardware/DisplayGammaCalibration.java
new file mode 100644
index 0000000..8be53c0
--- /dev/null
+++ b/cmhw/org/cyanogenmod/hardware/DisplayGammaCalibration.java
@@ -0,0 +1,79 @@
+/*
+ * 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;
+
+public class DisplayGammaCalibration {
+    private static final String[] GAMMA_FILE = new String[] {
+            "/sys/class/misc/samoled_color/red_v1_offset",
+            "/sys/class/misc/samoled_color/green_v1_offset",
+            "/sys/class/misc/samoled_color/blue_v1_offset"
+    };
+    private static final String GAMMA_FILE_V2 = "/sys/class/misc/colorcontrol/v1_offset";
+
+    public static boolean isSupported() {
+        if (new File(GAMMA_FILE_V2).exists()) {
+            return true;
+        }
+        for (String filePath : GAMMA_FILE) {
+            if (!new File(filePath).exists()) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    public static int getNumberOfControls() {
+        return 1;
+    }
+
+    public static int getMaxValue(int control)  {
+        return 20;
+    }
+
+    public static int getMinValue(int control)  {
+        return -20;
+    }
+
+    public static String getCurGamma(int control) {
+        if (new File(GAMMA_FILE_V2).exists()) {
+            return FileUtils.readOneLine(GAMMA_FILE_V2);
+        } else {
+            StringBuilder values = new StringBuilder();
+            for (String filePath : GAMMA_FILE) {
+                values.append(FileUtils.readOneLine(filePath)).append(" ");
+            }
+            return values.toString();
+        }
+    }
+
+    public static boolean setGamma(int control, String gamma) {
+        if (new File(GAMMA_FILE_V2).exists()) {
+            return FileUtils.writeLine(GAMMA_FILE_V2, gamma);
+        } else {
+            String[] valuesSplit = gamma.split(" ");
+            boolean result = true;
+            for (int i = 0; i < valuesSplit.length; i++) {
+                String targetFile = GAMMA_FILE[i];
+                result &= FileUtils.writeLine(targetFile, valuesSplit[i]);
+            }
+            return result;
+        }
+    }
+}