package net.mreriksson.misc.fireapplet;


import java.awt.image.BufferedImage;
import java.awt.image.WritableRaster;
import java.awt.Graphics;




public class FireApplet extends java.applet.Applet implements java.lang.Runnable
{



	BufferedImage myImage = new BufferedImage(640, 480, BufferedImage.TYPE_BYTE_GRAY);



	public void init()
	{
		startThread();
	}


	public void run()
	{
		long start = System.currentTimeMillis();
		doit();
		long end = System.currentTimeMillis();
		long diff = end - start;
		long diffs = diff / 1000;
		double fps = 25.0 / (diff / 1000.0);
		System.out.println("Start: " + start);
		System.out.println("End: " + end);
		System.out.println("Frames: 25");
		System.out.println("Total time: " + diff + " ms ( " + diffs + " s)");
		System.out.println("FPS: " + fps);
	}


	void startThread()
	{
		java.lang.Thread myThread = new java.lang.Thread(this);


		myThread.start();
	}


	void doit()
	{
		// myImage = new BufferedImage(640, 480, BufferedImage.TYPE_BYTE_GRAY);
		WritableRaster myRaster = myImage.getRaster();


		int buffer[] = new int[640 * 482]; // Two additional lines at the bottom


		for(int count=0; count < 25; count++)
		{
			// Add random line
			for(int i=307200; i < 308480; i++)
				buffer[i] = (int) (Math.random() * 150) + 100;


			for(int i=0; i < 307200; i++)
			{
				buffer[i] = (   buffer[ i + 639 ] +
											buffer[ i + 640 ] +
											buffer[ i + 641 ] +
											buffer[ i + 1280 ] ) >> 2;
			}


			// Draw the image
			myRaster.setPixels(0,0,640,480,buffer);
			repaint();
		}
	}



	public void paint(java.awt.Graphics g)
	{
		// Output the image to the screen
		g.drawImage(myImage, 0, 0, this);
	}


	public void update(java.awt.Graphics g)
	{
		paint(g);
	}
}