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// test application for TYA
// (c) Mon Sep 22 20:02:41 1997 Albrecht Kleine
//
//
import java.awt.*;
import java.awt.image.*;
public class Iview extends Frame
{
Image image,image0;
IviewCanvas ic;
Label ilab;
String xfilename;
static public void main(String[] args)
{
if (args.length > 0)
new Iview(args[0]);
else
System.out.println("Usage: Iview filename");
}
// constructor
Iview(String filename)
{
super("IView");
xfilename=filename;
ic = new IviewCanvas();
ilab=new Label();
add("Center",ic);
add("North", ilab);
MenuBar menubar = new MenuBar();
Menu file = new Menu("File");
Menu filter = new Menu("Filter");
menubar.add(file);
menubar.add(filter);
file.add("Quit");
filter.add("Filter red");
filter.add("Filter green");
filter.add("Filter blue");
filter.add("No filter");
setMenuBar(menubar);
image0=image=CreateImageDecoder();
ic.setImage(image);
ilab.setText(filename);
pack();
show();
}
private Image CreateImageDecoder()
{
Image iimage;
try
{
iimage = Toolkit.getDefaultToolkit().getImage(xfilename); // jpg,gif
}
catch (Exception ex)
{
ex.printStackTrace();
return null;
}
return iimage;
}
public boolean action(Event e, Object arg)
{
if (e.target instanceof MenuItem)
{
String label = (String) arg;
if (label.equals("Quit"))
System.exit(0);
else
if (label.equals("Filter red"))
ColorFilter(30);
else
if (label.equals("Filter green"))
ColorFilter(31);
else
if (label.equals("Filter blue"))
ColorFilter(32);
else
if (label.equals("No filter"))
ColorFilter(0);
}
return false;
}
void ColorFilter(int filternr)
{
if (filternr!=0)
{
Image ii=CreateImageDecoder();
ImageProducer ipro;
ipro = ii.getSource();
IviewColorFilter gf=new IviewColorFilter(filternr);
ipro=new FilteredImageSource(ipro,gf);
image= this.createImage(ipro);
}
else
image=image0;
ic.setImage(image);
ic.repaint();
}
}
// ----simple mini control for an image display------------------------------
//
class IviewCanvas extends Canvas
{
private Image image;
IviewCanvas()
{
this.image = null;
}
public Dimension preferredSize()
{
int w,h;
if (image!=null)
{
w = image.getWidth(this);
h = image.getHeight(this);
}
else
{
w=250; // for writing an error message
h=100;
}
return new Dimension(w,h);
}
public Image getImage()
{
return image;
}
public void setImage(Image image)
{
if (image!=null)
{
int i;
long startTime;
MediaTracker tracker;
System.out.println("waiting for MediaTracker...");
startTime=System.currentTimeMillis();
tracker = new MediaTracker (this);
tracker.addImage(image,0);
try
{
tracker.waitForID(0);
}
catch (Exception ex)
{
System.out.println("error Exception:");
ex.printStackTrace();
return;
}
switch (i=tracker.statusID(0,false))
{
case MediaTracker.COMPLETE:
long readyTime=System.currentTimeMillis();
System.out.println("MediaTracker OK. ");
System.out.println(IviewColorFilter.cnt+" filter calls, Time="+
( readyTime - startTime)+ " msec");
break;
default:
System.out.println("MediaTracker status = "+i);
image=null;
break;
}
}
this.image=image;
}
public void paint(Graphics g)
{
if (image!=null)
g.drawImage(image, 0, 0, this);
else
{
Font f=new Font("Courier",Font.BOLD,18);
g.setFont(f);
g.drawString("NO IMAGE LOADED",30,30);
}
}
}
//--------------------------------------------------------------------------
// Filter
class IviewColorFilter extends RGBImageFilter
{
int nummer;
static int cnt;
public IviewColorFilter(int filternummer)
{
canFilterIndexColorModel = false;
nummer=filternummer;
cnt=0;
}
public int filterRGB(int x, int y, int rgb)
{
int a,r,g,b;
cnt++;
// for speed testing
r = (rgb & 0x00ff0000);
g = (rgb & 0x0000ff00);
b = rgb & 0x000000ff ;
a = 0xff<<24;
switch (nummer)
{
case 30: g=0; // Rotfilter
b=0;
return a|r|g|b;
case 31: r=0; // Grnfilter
b=0;
return a|r|g|b;
case 32: r=0; // Blaufilter
g=0;
return a|r|g|b;
}
return rgb; // default: do nothing
}
}
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