Enable hardware accelerated drawing for SoftInputWindow of LatinIME

Taking advantage of Ib6a8bda46223ce1153f32834daf02a820d16136e

bug: 6872994
Change-Id: I799b25b6509980dd9f039bead9bc926b42cbb040

java/src/com/android/inputmethod/compat/InputMethodServiceCompatUtils.java

@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2012 The Android Open Source 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 com.android.inputmethod.compat;
+
+import android.inputmethodservice.InputMethodService;
+
+import java.lang.reflect.Method;
+
+public class InputMethodServiceCompatUtils {
+    private static final Method METHOD_enableHardwareAcceleration =
+            CompatUtils.getMethod(InputMethodService.class, "enableHardwareAcceleration");
+
+    private InputMethodServiceCompatUtils() {
+        // This utility class is not publicly instantiable.
+    }
+
+    public static boolean enableHardwareAcceleration(InputMethodService ims) {
+        return (Boolean)CompatUtils.invoke(ims, false, METHOD_enableHardwareAcceleration);
+    }
+}

java/src/com/android/inputmethod/latin/LatinIME.java

@@ -60,6 +60,7 @@ import com.android.inputmethod.accessibility.AccessibilityUtils;
 import com.android.inputmethod.accessibility.AccessibleKeyboardViewProxy;
 import com.android.inputmethod.compat.CompatUtils;
 import com.android.inputmethod.compat.InputMethodManagerCompatWrapper;
+import com.android.inputmethod.compat.InputMethodServiceCompatUtils;
 import com.android.inputmethod.compat.SuggestionSpanUtils;
 import com.android.inputmethod.keyboard.KeyDetector;
 import com.android.inputmethod.keyboard.Keyboard;
@@ -175,6 +176,8 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
 
     private AlertDialog mOptionsDialog;
 
+    private final boolean mIsHardwareAcceleratedDrawingEnabled;
+
     public final UIHandler mHandler = new UIHandler(this);
 
     public static class UIHandler extends StaticInnerHandlerWrapper<LatinIME> {
@@ -347,6 +350,9 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
         super();
         mSubtypeSwitcher = SubtypeSwitcher.getInstance();
         mKeyboardSwitcher = KeyboardSwitcher.getInstance();
+        mIsHardwareAcceleratedDrawingEnabled =
+                InputMethodServiceCompatUtils.enableHardwareAcceleration(this);
+        Log.i(TAG, "Hardware accelerated drawing: " + mIsHardwareAcceleratedDrawingEnabled);
     }
 
     @Override