GIF PLAYER JAVA CODE

**Admin** Fri Sep 18, 2009 9:31 am

Code:: import java.awt.*; import java.awt.image.*; import javax.swing.*; import java.io.*; import java.net.URL; import javax.imageio.*; import javax.imageio.metadata.*; import javax.imageio.stream.*; import org.w3c.dom.Node; class WriteAnimatedGif { public static void configure(IIOMetadata meta, String delayTime, int imageIndex) { String metaFormat = meta.getNativeMetadataFormatName(); if (!"javax_imageio_gif_image_1.0".equals(metaFormat)) { throw new IllegalArgumentException( "Unfamiliar gif metadata format: " + metaFormat); } Node root = meta.getAsTree(metaFormat); //find the GraphicControlExtension node Node child = root.getFirstChild(); while (child != null) { if ("GraphicControlExtension".equals(child.getNodeName())) { break; } child = child.getNextSibling(); } IIOMetadataNode gce = (IIOMetadataNode) child; gce.setAttribute("userInputFlag", "FALSE"); gce.setAttribute("delayTime", delayTime); //only the first node needs the ApplicationExtensions node if (imageIndex == 0) { IIOMetadataNode aes = new IIOMetadataNode("ApplicationExtensions"); IIOMetadataNode ae = new IIOMetadataNode("ApplicationExtension"); ae.setAttribute("applicationID", "NETSCAPE"); ae.setAttribute("authenticationCode", "2.0"); byte[] uo = new byte[]{ //last two bytes is an unsigned short (little endian) that //indicates the the number of times to loop. //0 means loop forever. 0x1, 0x0, 0x0 }; ae.setUserObject(uo); aes.appendChild(ae); root.appendChild(aes); } try { meta.setFromTree(metaFormat, root); } catch (IIOInvalidTreeException e) { //shouldn't happen throw new Error(e); } } /** Adapted from code via GeoffTitmus on http://forums.sun.com/thread.jspa?messageID=9988198 */ public static void saveAnimate( BufferedImage[] frames, //should ideally be an array -one for each frame String delayTime, File file) throws Exception { ImageWriter iw = ImageIO.getImageWritersByFormatName("gif").next(); ImageOutputStream ios = ImageIO.createImageOutputStream(file); iw.setOutput(ios); iw.prepareWriteSequence(null); for (int i = 0; i < frames.length; i++) { BufferedImage src = frames[i]; ImageWriteParam iwp = iw.getDefaultWriteParam(); IIOMetadata metadata = iw.getDefaultImageMetadata( new ImageTypeSpecifier(src), iwp); configure(metadata, delayTime, i); IIOImage ii = new IIOImage(src, null, metadata); iw.writeToSequence(ii, (ImageWriteParam) null); } iw.endWriteSequence(); ios.close(); } public static void main(String[] args) throws Exception { String[] props = { "java.vendor", "java.version", "java.vm.version", "os.name", "os.version" }; StringBuffer sb = new StringBuffer(); String eol = System.getProperty("line.separator"); for (String prop : props) { sb.append(prop); sb.append(" \t"); sb.append(System.getProperty(prop)); sb.append(eol); } System.out.print(sb); String name = "animatedstars.gif"; // alow a runtime argument to provide the OP file name if (args.length > 0) { name = args[0]; } String[] names = { "bronze", "silver", "gold", "platinum" }; String pre = "http://forums.sun.com/im/"; String suff = "-star.gif"; BufferedImage[] frames = new BufferedImage[names.length]; for (int ii = 0; ii < names.length; ii++) { URL url = new URL(pre + names[ii] + suff); System.out.println(url); frames[ii] = ImageIO.read(url); } File f = new File(name); // ensure we are getting a fresh file if (f.exists()) { if (!f.delete()) { System.err.println("Cannot delete file! " + f); System.exit(1); } } f.createNewFile(); // save an animated GIF at 2 FPS. saveAnimate(frames, "50", f); JOptionPane.showMessageDialog(null, new ImageIcon(f.toURI().toURL())); // show it in the system default viewer Desktop.getDesktop().open(f); } }