Name: skT45625 Date: 06/06/2000


java version "1.2.2"
Classic VM (build JDK 1.2.2-001 native threads, symcjit)


/*
 *
 * File: jpg.java
 *
 * Brief Overview:
 *
 * Demonstrates bug when encoding an INDEXED .jpg with ANTIALIASING
 *
 * .jpg files created from an INDEXED BufferedImage will be missing graphics
 * drawn when anti aliasing is enabled.
 *
 * Author: Lory Molesky (###@###.###)
 *
 *
 *
 * compile with
 *
 * javac jpg.java
 *
 * execute with
 *
 * java jpg
 *
 * examine resulting .jpg files
 *
 * indexed.jpg, rgb.jpg
 *
 * indexed.jpg has missing graphics.
 *
 */

import java.awt.*;

import java.awt.image.*;
import java.awt.image.BufferedImage;
import java.io.*;
import com.sun.image.codec.jpeg.*;

public class jpg {


    static int Display_height;
    static int Display_width;

    public static void drawBuffer(Graphics2D g2)
    {

RenderingHints RHAnti = new
RenderingHints(RenderingHints.KEY_ANTIALIASING,

RenderingHints.VALUE_ANTIALIAS_ON);
//
// Frame the background.
//

g2.setColor(Color.black);
g2.fillRect(0,0,Display_width,Display_height);

int offset = 10;
int offset2 = offset * 2;

g2.setColor(Color.white);
g2.fillRect(offset,offset,Display_width - offset2,Display_height -
offset2);

//
// Enable antialiasing.
//
g2.setRenderingHints(RHAnti);

//
// Draw a horizontal bar half way down.
//
g2.setColor(Color.gray);
g2.fillRect(0,Display_height/2 - offset/2,Display_width, offset);

//
// A line across one diaganal
//
g2.setColor(Color.black);
g2.drawLine(0,0,Display_width,Display_height);

//
// A line across another diaganal
//
g2.setColor(Color.green);
g2.drawLine(0,Display_height,Display_width,0);



    }


    public static void main(String[] argv)
    {

//
// Width, height of the image.
//
        Display_height = 200;
Display_width = 300;

//
// Create two buffered images, one with imageType INT_RGB, the other
BYTE_INDEXED
//
BufferedImage biRgb = new BufferedImage(Display_width, Display_height,
BufferedImage.TYPE_INT_RGB);
BufferedImage biIndexed = new BufferedImage(Display_width,
Display_height, BufferedImage.TYPE_BYTE_INDEXED);

Graphics2D g2 = null;
Graphics2D g2b = null;

g2 = biRgb.createGraphics();
g2b = biIndexed.createGraphics();

//
// draw the graphics into both buffered images.
//
drawBuffer(g2);
drawBuffer(g2b);

//
// Write the buffered images to two files.
// The resulting INDEXED .jpg will be missing all graphic operations
// written in the context of anti aliasing.
//

EncodeFile(biRgb, "rgb.jpg");
EncodeFile(biIndexed, "indexed.jpg");

    }

    //
    // Convert a BufferedImage to a .jpg
    //
    public static void EncodeFile(BufferedImage bi, String filename)
    {
FileOutputStream out = null;

        try {

File file = new File(".", filename);
out = new FileOutputStream(file);

} catch (java.io.IOException e) {
System.err.println("Cannot create ./" + filename);
System.exit(1);
}


try {

JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bi);
param.setQuality(1.0f, false);
encoder.setJPEGEncodeParam(param);
encoder.encode(bi);

} catch (java.io.IOException e) {
System.err.println("I/O exception");
System.exit(1);
}


    }

}
(Review ID: 105803)
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