cmhw: Add MDNIE RGB tuning capabilities
Change-Id: If3c2baf64cea2429bf34e54fd8164c1c2e32e94c
diff --git a/BoardConfig.mk b/BoardConfig.mk
index 8b9a9b2..8ec967c 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -63,5 +63,8 @@
BOARD_SEPOLICY_DIRS += device/samsung/exynos5420-common/sepolicy
BOARD_SEPOLICY_DIRS += $(LOCAL_PATH)/sepolicy
+# Cyanogen Hardware
+BOARD_HARDWARE_CLASS := $(COMMON_PATH)/cmhw
+
# Inherit from exynos5420-common
include device/samsung/exynos5420-common/BoardConfigCommon.mk
\ No newline at end of file
diff --git a/cmhw/org/cyanogenmod/hardware/DisplayColorCalibration.java b/cmhw/org/cyanogenmod/hardware/DisplayColorCalibration.java
new file mode 100644
index 0000000..193b207
--- /dev/null
+++ b/cmhw/org/cyanogenmod/hardware/DisplayColorCalibration.java
@@ -0,0 +1,150 @@
+/*
+ * Copyright (C) 2017 The LineageOS 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 android.os.IBinder;
+import android.os.Parcel;
+import android.os.RemoteException;
+import android.os.ServiceManager;
+import android.os.SystemProperties;
+import android.util.Slog;
+
+import org.cyanogenmod.internal.util.FileUtils;
+
+public class DisplayColorCalibration {
+
+ private static final String TAG = "DisplayColorCalibration";
+
+ private static final String RGB_FILE = "/sys/class/mdnie/mdnie/sensorRGB";
+
+ private static final boolean sUseGPUMode;
+
+ private static final int MIN = 1;
+ private static final int MAX = 255;
+
+ private static final int[] sCurColors = new int[] { MAX, MAX, MAX };
+
+ static {
+ // We can also support GPU transform using RenderEngine. This is not
+ // preferred though, as it has a high power cost.
+ sUseGPUMode = SystemProperties.getBoolean("debug.livedisplay.force_gpu", false);
+ }
+
+ public static boolean isSupported() {
+ if (!FileUtils.isFileWritable(RGB_FILE) && !sUseGPUMode) {
+ return false;
+ }
+
+ return true;
+ }
+
+ public static int getMaxValue() {
+ return MAX;
+ }
+
+ public static int getMinValue() {
+ return MIN;
+ }
+
+ public static int getDefValue() {
+ return getMaxValue();
+ }
+
+ public static String getCurColors() {
+ if (!sUseGPUMode) {
+ return FileUtils.readOneLine(RGB_FILE);
+ }
+
+ return String.format("%d %d %d", sCurColors[0],
+ sCurColors[1], sCurColors[2]);
+ }
+
+ public static boolean setColors(String colors) {
+ if (!sUseGPUMode) {
+ return FileUtils.writeLine(RGB_FILE, colors);
+ }
+
+ float[] mat = toColorMatrix(colors);
+
+ // set to null if identity
+ if (mat == null ||
+ (mat[0] == 1.0f && mat[5] == 1.0f &&
+ mat[10] == 1.0f && mat[15] == 1.0f)) {
+ return setColorTransform(null);
+ }
+ return setColorTransform(mat);
+ }
+
+ private static float[] toColorMatrix(String rgbString) {
+ String[] adj = rgbString == null ? null : rgbString.split(" ");
+
+ if (adj == null || adj.length != 3) {
+ return null;
+ }
+
+ float[] mat = new float[16];
+
+ // sanity check
+ for (int i = 0; i < 3; i++) {
+ int v = Integer.parseInt(adj[i]);
+
+ if (v >= MAX) {
+ v = MAX;
+ } else if (v < MIN) {
+ v = MIN;
+ }
+
+ mat[i * 5] = (float)v / (float)MAX;
+ sCurColors[i] = v;
+ }
+
+ mat[15] = 1.0f;
+ return mat;
+ }
+
+ /**
+ * Sets the surface flinger's color transformation as a 4x4 matrix. If the
+ * matrix is null, color transformations are disabled.
+ *
+ * @param m the float array that holds the transformation matrix, or null to
+ * disable transformation
+ */
+ private static boolean setColorTransform(float[] m) {
+ try {
+ final IBinder flinger = ServiceManager.getService("SurfaceFlinger");
+ if (flinger != null) {
+ final Parcel data = Parcel.obtain();
+ data.writeInterfaceToken("android.ui.ISurfaceComposer");
+ if (m != null) {
+ data.writeInt(1);
+ for (int i = 0; i < 16; i++) {
+ data.writeFloat(m[i]);
+ }
+ } else {
+ data.writeInt(0);
+ }
+ flinger.transact(1030, data, null, 0);
+ data.recycle();
+ }
+ } catch (RemoteException ex) {
+ Slog.e(TAG, "Failed to set color transform", ex);
+ return false;
+ }
+ return true;
+ }
+
+}