Merge "Add a SystemApi to control display saturation." into pi-dev

core/java/android/hardware/display/DisplayManager.java

@@ -534,6 +534,19 @@ public final class DisplayManager {
         return mGlobal.getWifiDisplayStatus();
     }
 
+    /**
+     * Set the level of color saturation to apply to the display.
+     * @param level The amount of saturation to apply, between 0 and 1 inclusive.
+     * 0 produces a grayscale image, 1 is normal.
+     *
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(Manifest.permission.CONTROL_DISPLAY_SATURATION)
+    public void setSaturationLevel(float level) {
+        mGlobal.setSaturationLevel(level);
+    }
+
     /**
      * Creates a virtual display.
      *

core/java/android/hardware/display/DisplayManagerGlobal.java

@@ -384,6 +384,17 @@ public final class DisplayManagerGlobal {
         }
     }
 
+    /**
+     * Set the level of color saturation to apply to the display.
+     */
+    public void setSaturationLevel(float level) {
+        try {
+            mDm.setSaturationLevel(level);
+        } catch (RemoteException ex) {
+            throw ex.rethrowFromSystemServer();
+        }
+    }
+
     public VirtualDisplay createVirtualDisplay(Context context, MediaProjection projection,
             String name, int width, int height, int densityDpi, Surface surface, int flags,
             VirtualDisplay.Callback callback, Handler handler, String uniqueId) {

core/java/android/hardware/display/IDisplayManager.aidl

@@ -65,6 +65,9 @@ interface IDisplayManager {
     // Requires CONFIGURE_DISPLAY_COLOR_MODE
     void requestColorMode(int displayId, int colorMode);
 
+    // Requires CONTROL_DISPLAY_SATURATION
+    void setSaturationLevel(float level);
+
     // Requires CAPTURE_VIDEO_OUTPUT, CAPTURE_SECURE_VIDEO_OUTPUT, or an appropriate
     // MediaProjection token for certain combinations of flags.
     int createVirtualDisplay(in IVirtualDisplayCallback callback,