test/jdk/java/awt/image/OpaquePNGToGIFTest.java - platform/libcore - Git at Google

 /*
  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */

  /*
  * @test
  * @bug     6334602
  * @summary Test verifies that when we create GIF image from Opaque PNG images
  *          it should not be transparent.
  * @modules java.desktop/com.sun.imageio.plugins.gif
  * @run     main/manual OpaquePNGToGIFTest
  */

 import java.awt.image.BufferedImage;
 import com.sun.imageio.plugins.gif.GIFImageMetadata;
 import java.awt.Canvas;
 import java.awt.Color;
 import java.awt.Dimension;
 import java.awt.Frame;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.awt.GridBagConstraints;
 import java.awt.GridBagLayout;
 import java.awt.Image;
 import java.awt.Toolkit;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import javax.imageio.IIOImage;
 import javax.imageio.ImageIO;
 import javax.imageio.ImageReader;
 import javax.imageio.ImageTypeSpecifier;
 import javax.imageio.ImageWriteParam;
 import javax.imageio.ImageWriter;
 import javax.imageio.metadata.IIOMetadata;
 import javax.imageio.stream.ImageInputStream;
 import javax.imageio.stream.ImageOutputStream;
 import javax.swing.JButton;
 import javax.swing.JDialog;
 import javax.swing.JLabel;
 import javax.swing.JPanel;
 import javax.swing.SwingUtilities;

 public final class OpaquePNGToGIFTest extends Frame {

     Image img = null;
     private Dimension prefImgSize = new Dimension(100, 100);
     private Color canvasColor = new Color(0, 255, 0);
     File outputFile = null;
     ImageCanvas imageCanvas = new ImageCanvas();
     FileOutputStream fos;
     private static GridBagLayout layout;
     private static JPanel mainControlPanel;
     private static JPanel resultButtonPanel;
     private static JPanel canvasPanel;
     private static JLabel instructionText;
     private static JButton startTestButton;
     private static JButton passButton;
     private static JButton failButton;
     private static JDialog dialog;
     private static Frame instructionFrame;
     private static Frame imageFrame;
     Toolkit tk;
     ImageWriter writer = null;
     boolean testPassed, testGeneratedInterrupt, startButtonClicked;
     private static Thread mainThread;

     public OpaquePNGToGIFTest() throws Exception {
         SwingUtilities.invokeAndWait(() -> {
             try {
                 startTest();
             } catch (Exception ex) {
                 Logger.getLogger(OpaquePNGToGIFTest.class.getName()).
                         log(Level.SEVERE, null, ex);
             }
         });
         mainThread = Thread.currentThread();
         try {
             Thread.sleep(60000);
         } catch (InterruptedException e) {
             if (!testPassed && testGeneratedInterrupt) {
                 throw new RuntimeException("Test failed or didnt run"
                         + " properly");
             }
         }
         if (!testGeneratedInterrupt) {
             if (img != null) {
                 img.flush();
             }
             instructionFrame.dispose();
             if (startButtonClicked) {
                 imageFrame.dispose();
             }
             fos.close();
             Files.delete(outputFile.toPath());
             throw new RuntimeException("user has not executed the test");
         }
     }

     public void startTest() throws Exception {
         instructionFrame = new Frame();
         dialog = new JDialog(instructionFrame);
         dialog.setTitle("Instruction Dialog");
         layout = new GridBagLayout();
         mainControlPanel = new JPanel(layout);
         resultButtonPanel = new JPanel(layout);
         canvasPanel = new JPanel();
         GridBagConstraints gbc = new GridBagConstraints();
         String instructions
                 = "<html>    INSTRUCTIONS:<br><br>"
                 + "After clicking on Start Test button you will see Red<br> "
                 + " circle drawn with light blue background, if the circle<br>"
                 + " color changes from Red to Green then press button Fail,<br>"
                 + " if it stays Red then press button Pass.<br><br></html>";
         instructionText = new JLabel();
         instructionText.setText(instructions);

         gbc.gridx = 0;
         gbc.gridy = 0;
         gbc.fill = GridBagConstraints.HORIZONTAL;
         mainControlPanel.add(instructionText, gbc);
         startTestButton = new JButton("Start Test");
         startTestButton.setActionCommand("Start Test");
         startTestButton.addActionListener(new ActionListener() {
             @Override
             public void actionPerformed(ActionEvent e) {
                 try {
                     startButtonClicked = true;
                     imageFrame = new Frame();

                     Iterator it = ImageIO.getImageWritersByFormatName("GIF");
                     while (it.hasNext()) {
                         writer = (ImageWriter) it.next();
                         break;
                     }
                     // read input opaque PNG image.
                     String fileName = "opaque_input.png";
                     String sep = System.getProperty("file.separator");
                     String dir = System.getProperty("test.src", ".");
                     System.out.println(dir + "     " + sep);
                     String filePath = dir + sep + fileName;
                     File inputFile = new File(filePath);
                     ImageInputStream iis = ImageIO.
                             createImageInputStream(inputFile);
                     ImageReader reader = null;
                     Iterator readerIter = ImageIO.getImageReaders(iis);
                     while (readerIter.hasNext()) {
                         reader = (ImageReader) readerIter.next();
                         break;
                     }

                     reader.setInput(iis);
                     IIOMetadata imgData = reader.getImageMetadata(0);
                     BufferedImage bi = reader.read(0);

                     //create temporary GIF imageas output
                     File directory = new File(dir + sep);
                     outputFile = File.createTempFile("output",
                             ".gif", directory);
                     createAnimatedImage(bi, imgData,
                             writer, outputFile);
                     writer.dispose();
                     iis.close();
                     if (outputFile == null) {
                         throw new RuntimeException("Unable to create output GIF"
                                 + " file");
                     }
                     // extract GIF image using Toolkit and show it on a Panel.
                     tk = Toolkit.getDefaultToolkit();
                     img = tk.getImage(dir + sep + outputFile.getName());
                     directory.delete();
                     imageCanvas.setBackground(canvasColor);
                     imageCanvas.setImage(img);
                     imageCanvas.setPreferredSize(prefImgSize);
                     canvasPanel.doLayout();

                     canvasPanel.add(imageCanvas);
                     imageFrame.add("Center", canvasPanel);
                     imageFrame.setSize(200, 200);
                     imageFrame.setVisible(true);
                     imageFrame.addWindowListener(new WindowAdapter() {
                         @Override
                         public void windowClosing(WindowEvent e) {
                             try {
                                 img.flush();
                                 instructionFrame.dispose();
                                 imageFrame.dispose();
                                 fail();
                             } finally {
                                 try {
                                     fos.close();
                                     Files.delete(outputFile.toPath());
                                 } catch (IOException ex) {
                                     Logger.getLogger(OpaquePNGToGIFTest.class.
                                             getName()).log(Level.SEVERE, null,
                                                     ex);
                                 }
                             }
                         }
                     });
                 } catch (IOException ex) {
                     Logger.getLogger(OpaquePNGToGIFTest.class.getName()).
                             log(Level.SEVERE, null, ex);
                 }
             }
         });
         passButton = new JButton("Pass");
         passButton.setActionCommand("Pass");
         passButton.addActionListener(new ActionListener() {
             @Override
             public void actionPerformed(ActionEvent e) {
                 try {
                     if (img != null) {
                         img.flush();
                     }
                     instructionFrame.dispose();
                     if (!startButtonClicked) {
                         fail();
                     } else {
                         imageFrame.dispose();
                         pass();
                     }
                 } finally {
                     try {
                         fos.close();
                         Files.delete(outputFile.toPath());
                     } catch (IOException ex) {
                         Logger.getLogger(OpaquePNGToGIFTest.class.
                                 getName()).log(Level.SEVERE, null, ex);
                     }
                 }
             }
         });
         failButton = new JButton("Fail");
         failButton.setActionCommand("Fail");
         failButton.addActionListener(new ActionListener() {
             @Override
             public void actionPerformed(ActionEvent e) {
                 try {
                     if (img != null) {
                         img.flush();
                     }
                     instructionFrame.dispose();
                     if (!startButtonClicked) {
                         fail();
                     } else {
                         imageFrame.dispose();
                         fail();
                     }
                 } finally {
                     try {
                         fos.close();
                         Files.delete(outputFile.toPath());
                     } catch (IOException ex) {
                         Logger.getLogger(OpaquePNGToGIFTest.class.
                                 getName()).log(Level.SEVERE, null, ex);
                     }
                 }
             }
         });
         gbc.gridx = 1;
         gbc.gridy = 0;
         resultButtonPanel.add(startTestButton, gbc);
         gbc.gridx = 2;
         gbc.gridy = 0;
         resultButtonPanel.add(passButton, gbc);
         gbc.gridx = 3;
         gbc.gridy = 0;
         resultButtonPanel.add(failButton, gbc);

         gbc.gridx = 0;
         gbc.gridy = 1;
         mainControlPanel.add(resultButtonPanel, gbc);

         dialog.add(mainControlPanel);
         dialog.setSize(400, 200);
         dialog.setLocationRelativeTo(null);
         dialog.setVisible(true);

         dialog.addWindowListener(new WindowAdapter() {
             @Override
             public void windowClosing(WindowEvent e) {
                 try {
                     if (img != null) {
                         img.flush();
                     }
                     instructionFrame.dispose();
                     if (!startButtonClicked) {
                         fail();
                     } else {
                         imageFrame.dispose();
                         fail();
                     }
                 } finally {
                     try {
                         fos.close();
                         Files.delete(outputFile.toPath());
                     } catch (IOException ex) {
                         Logger.getLogger(OpaquePNGToGIFTest.class.
                                 getName()).log(Level.SEVERE, null, ex);
                     }
                 }
             }
         });
     }

     public synchronized void pass() {
         testPassed = true;
         testGeneratedInterrupt = true;
         mainThread.interrupt();
     }

     public synchronized void fail() {
         testPassed = false;
         testGeneratedInterrupt = true;
         mainThread.interrupt();
     }

     public void createAnimatedImage(BufferedImage bi, IIOMetadata metadata,
             ImageWriter writer, File outputFile) {
         try {

             fos = new FileOutputStream(outputFile);
             ImageOutputStream ios = ImageIO.createImageOutputStream(fos);
             System.out.println(ios);
             writer.setOutput(ios);

             ImageWriteParam param = writer.getDefaultWriteParam();
             IIOMetadata streamData = writer.getDefaultStreamMetadata(param);

             writer.prepareWriteSequence(streamData);
             ImageTypeSpecifier specify = new ImageTypeSpecifier(bi);
             IIOMetadata imgData = writer.convertImageMetadata(
                     (IIOMetadata) metadata, specify, param);
             GIFImageMetadata gifData = setAnimationProperties(imgData);
             IIOImage iim = new IIOImage(bi, null, gifData);
             param.setProgressiveMode(param.MODE_DISABLED);
             writer.writeToSequence(iim, param);
             writer.endWriteSequence();
             ios.close();
         } catch (Exception e) {
             e.printStackTrace();
         }
     }

     public GIFImageMetadata setAnimationProperties(IIOMetadata data) {
         ArrayList appIDs = new ArrayList();
         appIDs.add(new String("NETSCAPE").getBytes());
         ArrayList authCodes = new ArrayList();
         authCodes.add(new String("2.0").getBytes());
         ArrayList appData = new ArrayList();
         byte[] authData = {1, 0, 0};
         appData.add(authData);

         GIFImageMetadata gifData = (GIFImageMetadata) data;
         gifData.delayTime = 200;
         // If we set disposalMethod to 2 then only the issue is reproduced.
         gifData.disposalMethod = 2;
         gifData.userInputFlag = false;

         gifData.applicationIDs = appIDs;
         gifData.authenticationCodes = authCodes;
         gifData.applicationData = appData;

         return gifData;
     }

     public static void main(String args[]) throws Exception {
         OpaquePNGToGIFTest test = new OpaquePNGToGIFTest();
     }

     class ImageCanvas extends Canvas {

         Image im = null;

         public void setImage(Image img) {
             im = img;
         }

         public void clearImage() {
             im = null;
             repaint();
         }

         public void paint(Graphics g) {
             Graphics2D g2d = (Graphics2D) g;

             if (im != null) {
                 g2d.drawImage(im, 1, 1, getWidth(), getHeight(), this);
             }
         }
     }
 }
	/*
	* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	/*
	* @test
	* @bug 6334602
	* @summary Test verifies that when we create GIF image from Opaque PNG images
	* it should not be transparent.
	* @modules java.desktop/com.sun.imageio.plugins.gif
	* @run main/manual OpaquePNGToGIFTest
	*/

	import java.awt.image.BufferedImage;
	import com.sun.imageio.plugins.gif.GIFImageMetadata;
	import java.awt.Canvas;
	import java.awt.Color;
	import java.awt.Dimension;
	import java.awt.Frame;
	import java.awt.Graphics;
	import java.awt.Graphics2D;
	import java.awt.GridBagConstraints;
	import java.awt.GridBagLayout;
	import java.awt.Image;
	import java.awt.Toolkit;
	import java.awt.event.ActionEvent;
	import java.awt.event.ActionListener;
	import java.awt.event.WindowAdapter;
	import java.awt.event.WindowEvent;
	import java.io.File;
	import java.io.FileOutputStream;
	import java.io.IOException;
	import java.nio.file.Files;
	import java.util.ArrayList;
	import java.util.Iterator;
	import java.util.logging.Level;
	import java.util.logging.Logger;
	import javax.imageio.IIOImage;
	import javax.imageio.ImageIO;
	import javax.imageio.ImageReader;
	import javax.imageio.ImageTypeSpecifier;
	import javax.imageio.ImageWriteParam;
	import javax.imageio.ImageWriter;
	import javax.imageio.metadata.IIOMetadata;
	import javax.imageio.stream.ImageInputStream;
	import javax.imageio.stream.ImageOutputStream;
	import javax.swing.JButton;
	import javax.swing.JDialog;
	import javax.swing.JLabel;
	import javax.swing.JPanel;
	import javax.swing.SwingUtilities;

	public final class OpaquePNGToGIFTest extends Frame {

	Image img = null;
	private Dimension prefImgSize = new Dimension(100, 100);
	private Color canvasColor = new Color(0, 255, 0);
	File outputFile = null;
	ImageCanvas imageCanvas = new ImageCanvas();
	FileOutputStream fos;
	private static GridBagLayout layout;
	private static JPanel mainControlPanel;
	private static JPanel resultButtonPanel;
	private static JPanel canvasPanel;
	private static JLabel instructionText;
	private static JButton startTestButton;
	private static JButton passButton;
	private static JButton failButton;
	private static JDialog dialog;
	private static Frame instructionFrame;
	private static Frame imageFrame;
	Toolkit tk;
	ImageWriter writer = null;
	boolean testPassed, testGeneratedInterrupt, startButtonClicked;
	private static Thread mainThread;

	public OpaquePNGToGIFTest() throws Exception {
	SwingUtilities.invokeAndWait(() -> {
	try {
	startTest();
	} catch (Exception ex) {
	Logger.getLogger(OpaquePNGToGIFTest.class.getName()).
	log(Level.SEVERE, null, ex);
	}
	});
	mainThread = Thread.currentThread();
	try {
	Thread.sleep(60000);
	} catch (InterruptedException e) {
	if (!testPassed && testGeneratedInterrupt) {
	throw new RuntimeException("Test failed or didnt run"
	+ " properly");
	}
	}
	if (!testGeneratedInterrupt) {
	if (img != null) {
	img.flush();
	}
	instructionFrame.dispose();
	if (startButtonClicked) {
	imageFrame.dispose();
	}
	fos.close();
	Files.delete(outputFile.toPath());
	throw new RuntimeException("user has not executed the test");
	}
	}

	public void startTest() throws Exception {
	instructionFrame = new Frame();
	dialog = new JDialog(instructionFrame);
	dialog.setTitle("Instruction Dialog");
	layout = new GridBagLayout();
	mainControlPanel = new JPanel(layout);
	resultButtonPanel = new JPanel(layout);
	canvasPanel = new JPanel();
	GridBagConstraints gbc = new GridBagConstraints();
	String instructions
	= "<html> INSTRUCTIONS:<br><br>"
	+ "After clicking on Start Test button you will see Red<br> "
	+ " circle drawn with light blue background, if the circle<br>"
	+ " color changes from Red to Green then press button Fail,<br>"
	+ " if it stays Red then press button Pass.<br><br></html>";
	instructionText = new JLabel();
	instructionText.setText(instructions);

	gbc.gridx = 0;
	gbc.gridy = 0;
	gbc.fill = GridBagConstraints.HORIZONTAL;
	mainControlPanel.add(instructionText, gbc);
	startTestButton = new JButton("Start Test");
	startTestButton.setActionCommand("Start Test");
	startTestButton.addActionListener(new ActionListener() {
	@Override
	public void actionPerformed(ActionEvent e) {
	try {
	startButtonClicked = true;
	imageFrame = new Frame();

	Iterator it = ImageIO.getImageWritersByFormatName("GIF");
	while (it.hasNext()) {
	writer = (ImageWriter) it.next();
	break;
	}
	// read input opaque PNG image.
	String fileName = "opaque_input.png";
	String sep = System.getProperty("file.separator");
	String dir = System.getProperty("test.src", ".");
	System.out.println(dir + " " + sep);
	String filePath = dir + sep + fileName;
	File inputFile = new File(filePath);
	ImageInputStream iis = ImageIO.
	createImageInputStream(inputFile);
	ImageReader reader = null;
	Iterator readerIter = ImageIO.getImageReaders(iis);
	while (readerIter.hasNext()) {
	reader = (ImageReader) readerIter.next();
	break;
	}

	reader.setInput(iis);
	IIOMetadata imgData = reader.getImageMetadata(0);
	BufferedImage bi = reader.read(0);

	//create temporary GIF imageas output
	File directory = new File(dir + sep);
	outputFile = File.createTempFile("output",
	".gif", directory);
	createAnimatedImage(bi, imgData,
	writer, outputFile);
	writer.dispose();
	iis.close();
	if (outputFile == null) {
	throw new RuntimeException("Unable to create output GIF"
	+ " file");
	}
	// extract GIF image using Toolkit and show it on a Panel.
	tk = Toolkit.getDefaultToolkit();
	img = tk.getImage(dir + sep + outputFile.getName());
	directory.delete();
	imageCanvas.setBackground(canvasColor);
	imageCanvas.setImage(img);
	imageCanvas.setPreferredSize(prefImgSize);
	canvasPanel.doLayout();

	canvasPanel.add(imageCanvas);
	imageFrame.add("Center", canvasPanel);
	imageFrame.setSize(200, 200);
	imageFrame.setVisible(true);
	imageFrame.addWindowListener(new WindowAdapter() {
	@Override
	public void windowClosing(WindowEvent e) {
	try {
	img.flush();
	instructionFrame.dispose();
	imageFrame.dispose();
	fail();
	} finally {
	try {
	fos.close();
	Files.delete(outputFile.toPath());
	} catch (IOException ex) {
	Logger.getLogger(OpaquePNGToGIFTest.class.
	getName()).log(Level.SEVERE, null,
	ex);
	}
	}
	}
	});
	} catch (IOException ex) {
	Logger.getLogger(OpaquePNGToGIFTest.class.getName()).
	log(Level.SEVERE, null, ex);
	}
	}
	});
	passButton = new JButton("Pass");
	passButton.setActionCommand("Pass");
	passButton.addActionListener(new ActionListener() {
	@Override
	public void actionPerformed(ActionEvent e) {
	try {
	if (img != null) {
	img.flush();
	}
	instructionFrame.dispose();
	if (!startButtonClicked) {
	fail();
	} else {
	imageFrame.dispose();
	pass();
	}
	} finally {
	try {
	fos.close();
	Files.delete(outputFile.toPath());
	} catch (IOException ex) {
	Logger.getLogger(OpaquePNGToGIFTest.class.
	getName()).log(Level.SEVERE, null, ex);
	}
	}
	}
	});
	failButton = new JButton("Fail");
	failButton.setActionCommand("Fail");
	failButton.addActionListener(new ActionListener() {
	@Override
	public void actionPerformed(ActionEvent e) {
	try {
	if (img != null) {
	img.flush();
	}
	instructionFrame.dispose();
	if (!startButtonClicked) {
	fail();
	} else {
	imageFrame.dispose();
	fail();
	}
	} finally {
	try {
	fos.close();
	Files.delete(outputFile.toPath());
	} catch (IOException ex) {
	Logger.getLogger(OpaquePNGToGIFTest.class.
	getName()).log(Level.SEVERE, null, ex);
	}
	}
	}
	});
	gbc.gridx = 1;
	gbc.gridy = 0;
	resultButtonPanel.add(startTestButton, gbc);
	gbc.gridx = 2;
	gbc.gridy = 0;
	resultButtonPanel.add(passButton, gbc);
	gbc.gridx = 3;
	gbc.gridy = 0;
	resultButtonPanel.add(failButton, gbc);

	gbc.gridx = 0;
	gbc.gridy = 1;
	mainControlPanel.add(resultButtonPanel, gbc);

	dialog.add(mainControlPanel);
	dialog.setSize(400, 200);
	dialog.setLocationRelativeTo(null);
	dialog.setVisible(true);

	dialog.addWindowListener(new WindowAdapter() {
	@Override
	public void windowClosing(WindowEvent e) {
	try {
	if (img != null) {
	img.flush();
	}
	instructionFrame.dispose();
	if (!startButtonClicked) {
	fail();
	} else {
	imageFrame.dispose();
	fail();
	}
	} finally {
	try {
	fos.close();
	Files.delete(outputFile.toPath());
	} catch (IOException ex) {
	Logger.getLogger(OpaquePNGToGIFTest.class.
	getName()).log(Level.SEVERE, null, ex);
	}
	}
	}
	});
	}

	public synchronized void pass() {
	testPassed = true;
	testGeneratedInterrupt = true;
	mainThread.interrupt();
	}

	public synchronized void fail() {
	testPassed = false;
	testGeneratedInterrupt = true;
	mainThread.interrupt();
	}

	public void createAnimatedImage(BufferedImage bi, IIOMetadata metadata,
	ImageWriter writer, File outputFile) {
	try {

	fos = new FileOutputStream(outputFile);
	ImageOutputStream ios = ImageIO.createImageOutputStream(fos);
	System.out.println(ios);
	writer.setOutput(ios);

	ImageWriteParam param = writer.getDefaultWriteParam();
	IIOMetadata streamData = writer.getDefaultStreamMetadata(param);

	writer.prepareWriteSequence(streamData);
	ImageTypeSpecifier specify = new ImageTypeSpecifier(bi);
	IIOMetadata imgData = writer.convertImageMetadata(
	(IIOMetadata) metadata, specify, param);
	GIFImageMetadata gifData = setAnimationProperties(imgData);
	IIOImage iim = new IIOImage(bi, null, gifData);
	param.setProgressiveMode(param.MODE_DISABLED);
	writer.writeToSequence(iim, param);
	writer.endWriteSequence();
	ios.close();
	} catch (Exception e) {
	e.printStackTrace();
	}
	}

	public GIFImageMetadata setAnimationProperties(IIOMetadata data) {
	ArrayList appIDs = new ArrayList();
	appIDs.add(new String("NETSCAPE").getBytes());
	ArrayList authCodes = new ArrayList();
	authCodes.add(new String("2.0").getBytes());
	ArrayList appData = new ArrayList();
	byte[] authData = {1, 0, 0};
	appData.add(authData);

	GIFImageMetadata gifData = (GIFImageMetadata) data;
	gifData.delayTime = 200;
	// If we set disposalMethod to 2 then only the issue is reproduced.
	gifData.disposalMethod = 2;
	gifData.userInputFlag = false;

	gifData.applicationIDs = appIDs;
	gifData.authenticationCodes = authCodes;
	gifData.applicationData = appData;

	return gifData;
	}

	public static void main(String args[]) throws Exception {
	OpaquePNGToGIFTest test = new OpaquePNGToGIFTest();
	}

	class ImageCanvas extends Canvas {

	Image im = null;

	public void setImage(Image img) {
	im = img;
	}

	public void clearImage() {
	im = null;
	repaint();
	}

	public void paint(Graphics g) {
	Graphics2D g2d = (Graphics2D) g;

	if (im != null) {
	g2d.drawImage(im, 1, 1, getWidth(), getHeight(), this);
	}
	}
	}
	}