import com.sun.javafx.image.ByteToBytePixelConverter;
import com.sun.javafx.image.PixelGetter;
import com.sun.javafx.image.impl.ByteBgra;
import com.sun.javafx.image.impl.ByteBgraPre;
import javafx.application.Application;
import javafx.application.Platform;
import javafx.stage.Stage;

public class ImageRace extends Application {
    volatile boolean ready = false;
    volatile boolean t1Running = false;
    volatile boolean t2Running = false;

    ByteToBytePixelConverter conv;
    PixelGetter getter;

    void initByteBgra() {
        conv = ByteBgra.ToByteBgraPreConverter;
    }

    void initByteBgraPre() {
        getter = ByteBgraPre.getter;
    }

    @Override public void start(Stage stage) {
        Thread t1 = new Thread(() -> {
            System.err.println("thread 1 started");
            t1Running = true;
            while (!ready) {}
            initByteBgra();
            System.err.println("thread 1 done");
        });

        Thread t2 = new Thread(() -> {
            System.err.println("thread 2 started");
            t2Running = true;
            while (!ready) {}
            initByteBgraPre();
            System.err.println("thread 2 done");
        });

        // If we initialize either of the ByteBgra* classes from the main thread
        // then there is no deadlock. Similarly, if we run thread 1 and thread 2
        // serially there is no deadlock.

        // This will workaround the issue
//        try {
//            Class.forName("com.sun.javafx.image.impl.ByteBgra");
//        } catch (ClassNotFoundException ignore) {
//        }

        t1.start();
        t2.start();
        while (!t1Running) {}
        while (!t2Running) {}
        System.err.println("[main] signal the threads to proceed");
        try {
            Thread.sleep(100);
        } catch (InterruptedException ex) {}
        ready = true;

        try {
            Thread.sleep(100);
            t1.join();
            t2.join();
        } catch (InterruptedException ex) {}

        Platform.exit();
    }

    public static void main(String[] args) {
        Application.launch(args);
    }

}