dynamic-layout-inspector/agent/appinspection/src/main/com/android/tools/agent/appinspection/framework/SynchronousPixelCopy.java

/*
 * Copyright (C) 2016 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.tools.agent.appinspection.framework;

import android.graphics.Bitmap;
import android.os.Handler;
import android.os.HandlerThread;
import android.view.PixelCopy;
import android.view.PixelCopy.OnPixelCopyFinishedListener;
import android.view.Surface;

/**
 * Adapted from
 * cts/libs/deviceutillegacy/src/com/android/compatibility/common/util/SynchronousPixelCopy.java
 */
public class SynchronousPixelCopy implements OnPixelCopyFinishedListener {
    private static final Handler sHandler;

    static {
        HandlerThread thread = new HandlerThread("PixelCopyHelper");
        thread.start();
        sHandler = new Handler(thread.getLooper());
    }

    private int mStatus = -1;

    public int request(Surface source, Bitmap dest) throws InterruptedException {
        synchronized (this) {
            PixelCopy.request(source, dest, this, sHandler);
            return getResultLocked();
        }
    }

    private int getResultLocked() throws InterruptedException {
        // The normal amount of time should be much less--around 10ms. However it's possible for
        // other things that are going on at the same time to delay substantially if e.g. an
        // activity is launching.
        this.wait(1000);
        return mStatus;
    }

    @Override
    public void onPixelCopyFinished(int copyResult) {
        synchronized (this) {
            mStatus = copyResult;
            this.notify();
        }
    }
}