/* PImage loading runs in another thread, 1 at a time. */

final SynchronousQueue<PImage> imgq = new SynchronousQueue<PImage>();
volatile CopyOnWriteArrayList<String> imgFileNames = null ;
volatile int imgFileIndex = 0 ;
class PImageLoader implements Runnable {
  private int imgFileIndex = 0 ;
  private volatile int lastputindex = 0 ;
  void run() {
    while(true) {
      PImage img = loadImage(imagedir + "/" + imgFileNames.get(imgFileIndex));
      lastputindex = imgFileIndex ;
      boolean done = false ;
      while (! done) {
        try {
          imgq.put(img);
          done = true ;
        } catch (InterruptedException x) {
        }
      }
      imgFileIndex = (imgFileIndex+1) % imgFileNames.size();
    }
  }
  int getDisplayedImageIndex() {
    return lastputindex ;
  }
}