/*
 * @(#)ImageOps.java	1.17 98/06/29
 *
 * Copyright 1998 by Sun Microsystems, Inc.,
 * 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
 * All rights reserved.
 *
 * This software is the confidential and proprietary information
 * of Sun Microsystems, Inc. ("Confidential Information").  You
 * shall not disclose such Confidential Information and shall use
 * it only in accordance with the terms of the license agreement
 * you entered into with Sun.
 */

package demos.Images;

import java.awt.*;
import java.awt.image.*;
import java.awt.geom.AffineTransform;
import java.awt.font.TextLayout;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import java.awt.event.WindowAdapter;
import J2DCanvas;


/**
 * Images drawn using operators such as ConvolveOp LowPass & Sharpen,
 * LookupOp and RescaleOp.
 */
public class ImageOps extends J2DCanvas {

    private BufferedImage bi[];

    public static final float[] SHARPEN3x3_3 = { 0.f, -1.f,  0.f,
                                                -1.f,  5.f, -1.f,
                                                 0.f, -1.f,  0.f};

    public ImageOps() {
        setBackground(Color.white);

	bi = new BufferedImage[4];
	String s[] = { "bld.jpg", "bld.jpg", "boat.gif", "boat.gif" };
        for (int i = 0; i < bi.length; i++) {
	    Image img = getImage("images/" + s[i]);
	    int iw = img.getWidth(this);
	    int ih = img.getHeight(this);
	    bi[i] = new BufferedImage(iw, ih, BufferedImage.TYPE_INT_RGB);
	    Graphics2D big = bi[i].createGraphics();
	    big.drawImage(img,0,0,this);
	}
    }


    public void drawDemo(Graphics2D g2) {

	g2.setColor(Color.black);
 	float[][] data = {{0.1f, 0.1f, 0.1f,    // low-pass filter
   		            0.1f, 0.2f, 0.1f,
   		            0.1f, 0.1f, 0.1f},
		            SHARPEN3x3_3};

	String theDesc[] = { "Convolve LowPass", "Convolve Sharpen",
			     "LookupOp", "RescaleOp" };
        for (int i = 0; i < bi.length; i++) {
            int iw = bi[i].getWidth(this);
            int ih = bi[i].getHeight(this);
	    int x = 0, y = 0;

            AffineTransform at = new AffineTransform();
	    at.scale((w-14)/2.0/iw, (h-34)/2.0/ih);

	    BufferedImageOp biop = null;
	    BufferedImage bimg = new BufferedImage(iw,ih,BufferedImage.TYPE_INT_RGB);

	    switch (i) {
		case 0 :
		case 1 : x = i==0?5:w/2+3; y = 15;
        		 Kernel kernel = new Kernel(3,3,data[i]);
        		 ConvolveOp cop = new ConvolveOp(kernel,
                                                       ConvolveOp.EDGE_NO_OP,
                                                       null);
			 cop.filter(bi[i],bimg);
	    		 biop = new AffineTransformOp(at,
                                     AffineTransformOp.TYPE_NEAREST_NEIGHBOR);
			 break;
		case 2 : x = 5; y = h/2+15;
		         byte chlut[] = new byte[256];
      			 for (int j=0;j<200 ;j++ )
       			     chlut[j]=(byte)(256-j);
      			 ByteLookupTable blut=new ByteLookupTable(0,chlut);
      			 LookupOp lop = new LookupOp(blut, null);
      			 lop.filter(bi[i],bimg);
			 biop = new AffineTransformOp(at,
                                         AffineTransformOp.TYPE_BILINEAR);
			 break;
		case 3 : x = w/2+3; y = h/2+15;
			 RescaleOp rop = new RescaleOp(1.1f,20.0f, null);
			 rop.filter(bi[i],bimg);
			 biop = new AffineTransformOp(at,
                                         AffineTransformOp.TYPE_BILINEAR);
	    }
      	    g2.drawImage(bimg,biop,x,y);
	    TextLayout tl = new TextLayout(theDesc[i], g2.getFont(),g2.getFontRenderContext());
	    tl.draw(g2, (float) x, (float) y-4);
	}
    }


    public static void main(String s[]) {
	WindowListener l = new WindowAdapter() {
	    public void windowClosing(WindowEvent e) {System.exit(0);}
	};
	Frame f = new Frame("Java2D Demo - ImageOps");
	f.addWindowListener(l);
	f.add("Center", new ImageOps());
	f.pack();
	f.setSize(new Dimension(400,300));
	f.show();
    }
}