* * On the server side the codebase must contain jogl.jar , * gluegen-rt.jar, and all of the jogl-natives-*.jar and * gluegen-rt-natives-*.jar files from the standard JOGL distribution * (provided in jogl-[version]-webstart.zip). This is the location * from which the JOGL library used by the applet is downloaded. The * codebase additionally contains the jar file of the user's * potentially untrusted applet. All of the JOGL and GlueGen-related * jars must be signed by the same entity, which is typically Sun * Microsystems, Inc. * * Sample applet code: *
* <applet code="com.sun.opengl.util.JOGLAppletLauncher" * width=600 * height=400 * codebase="/lib" * archive="jogl.jar,gluegen-rt.jar,your_applet.jar"> * <param name="subapplet.classname" VALUE="untrusted.JOGLApplet"> * <param name="subapplet.displayname" VALUE="My JOGL Applet"> * <param name="progressbar" value="true"> * <param name="cache_archive" VALUE="jogl.jar,gluegen-rt.jar,your_applet.jar"> * <param name="cache_archive_ex" VALUE="jogl.jar;preload,gluegen-rt.jar;preload,your_applet.jar;preload"> * </applet> **
* * There are some limitations with this approach. It is not possible * to specify e.g. -Dsun.java2d.noddraw=true or * -Dsun.java2d.opengl=true for better control over the Java2D * pipeline as it is with Java Web Start. There appear to be issues * with multiple JOGL-based applets on the same web page, though * multiple instances of the same applet appear to work. The latter * may simply be a bug which needs to be fixed.
* * The JOGL natives are cached in the user's home directory (the value * of the "user.home" system property in Java) under the directory * .jogl_ext. The Java Plug-In is responsible for performing all other * jar caching. If the JOGL installation is updated on the server, the * .jogl_ext cache will automatically be updated.
* * This technique requires that JOGL has not been installed in to the * JRE under e.g. jre/lib/ext. If problems are seen when deploying * this applet launcher, the first question to ask the end user is * whether jogl.jar and any associated DLLs, .so's, etc. are installed * directly in to the JRE. The applet launcher has been tested * primarily under Mozilla, Firefox and Internet Explorer; there may * be problems when running under, for example, Opera.
*
* @author Lilian Chamontin
* @author Kenneth Russell
*/
public class JOGLAppletLauncher extends Applet {
static {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception ignore) {
}
}
// metadata for native libraries
private static class NativeLibInfo {
private String osName;
private String osArch;
private String osNameAndArchPair;
private String nativePrefix;
private String nativeSuffix;
public NativeLibInfo(String osName, String osArch, String osNameAndArchPair, String nativePrefix, String nativeSuffix) {
this.osName = osName;
this.osArch = osArch;
this.osNameAndArchPair = osNameAndArchPair;
this.nativePrefix = nativePrefix;
this.nativeSuffix = nativeSuffix;
}
public boolean matchesOSAndArch(String osName, String osArch) {
if (osName.toLowerCase().startsWith(this.osName)) {
if ((this.osArch == null) ||
(osArch.toLowerCase().startsWith(this.osArch))) {
return true;
}
}
return false;
}
public boolean matchesNativeLib(String fileName) {
if (fileName.toLowerCase().endsWith(nativeSuffix)) {
return true;
}
return false;
}
public String formatNativeJarName(String nativeJarPattern) {
return MessageFormat.format(nativeJarPattern, new Object[] { osNameAndArchPair });
}
public String getNativeLibName(String baseName) {
return nativePrefix + baseName + nativeSuffix;
}
public boolean isMacOS() {
return (osName.equals("mac"));
}
public boolean mayNeedDRIHack() {
return (!isMacOS() && !osName.equals("win"));
}
}
private static final NativeLibInfo[] allNativeLibInfo = {
new NativeLibInfo("win", "x86", "windows-i586", "", ".dll"),
new NativeLibInfo("mac", "ppc", "macosx-ppc", "lib", ".jnilib"),
new NativeLibInfo("mac", "i386", "macosx-universal", "lib", ".jnilib"),
new NativeLibInfo("linux", "i386", "linux-i586", "lib", ".so"),
new NativeLibInfo("linux", "x86", "linux-i586", "lib", ".so"),
new NativeLibInfo("sunos", "sparc", "solaris-sparc", "lib", ".so"),
new NativeLibInfo("sunos", "x86", "solaris-i586", "lib", ".so")
};
private NativeLibInfo nativeLibInfo;
// Library names computed once the jar comes down.
// The signatures of these native libraries are checked before
// installing them.
private String[] nativeLibNames;
/** The applet we have to start */
private Applet subApplet;
private String subAppletClassName; // from applet PARAM
private String subAppletDisplayName; // from applet PARAM
/** URL string to an image used while installing */
private String subAppletImageName; // from applet PARAM
private String installDirectory; // (defines a private directory for native libs)
private JPanel loaderPanel = new JPanel(new BorderLayout());
private JProgressBar progressBar = new JProgressBar(0,100);
private boolean isInitOk = false;
/** false once start() has been invoked */
private boolean firstStart = true;
/** true if start() has passed successfully */
private boolean joglStarted = false;
/** Indicates whether JOAL is present */
private boolean haveJOAL = false;
// Helpers for question about whether to update deployment.properties
private static final String JRE_PREFIX = "deployment.javapi.jre.";
private static final String NODDRAW_PROP = "-Dsun.java2d.noddraw=true";
private static final String DONT_ASK = ".dont_ask";
public JOGLAppletLauncher() {
}
private static String md2Hash(String str) {
// Helps hash the jars in the "archive" tag into a hex value to
// avoid having too-long path names in the install directory's
// path name but also to have unique directories for each
// different archive set used (also meaning for each class loader
// loading something via the JOGLAppletLauncher) -- note that this
// is somewhat dependent on the Sun implementation of applets and
// their class loaders
MessageDigest md2 = null;
try {
md2 = MessageDigest.getInstance("MD2");
} catch (NoSuchAlgorithmException e) {
return "";
}
byte[] digest = md2.digest(str.getBytes());
if (digest == null || (digest.length == 0))
return "";
StringBuffer res = new StringBuffer();
for (int i = 0; i < digest.length; i++) {
res.append(Integer.toHexString(digest[i] & 0xFF));
}
return res.toString();
}
/** Applet initialization */
public void init() {
this.subAppletClassName = getParameter("subapplet.classname");
if (subAppletClassName == null){
displayError("Init failed : Missing subapplet.classname argument");
return;
}
this.subAppletDisplayName = getParameter("subapplet.displayname");
if (subAppletDisplayName == null){
subAppletDisplayName = "Applet";
}
this.subAppletImageName = getParameter("subapplet.image");
initLoaderLayout();
validate();
String extForm = getCodeBase().toExternalForm();
String codeBase = extForm.substring(extForm.indexOf(":") + 3); // minus http:// or https://
this.installDirectory = codeBase.replace(':', '_')
.replace('.', '_').replace('/', '_').replace('~','_') // clean up the name
+ md2Hash(getParameter("archive")); // make it unique across different applet class loaders
String osName = System.getProperty("os.name");
String osArch = System.getProperty("os.arch");
if (checkOSAndArch(osName, osArch)) {
this.isInitOk = true;
} else {
displayError("Init failed : Unsupported os / arch ( " + osName + " / " + osArch + " )");
}
}
private void displayMessage(final String message){
SwingUtilities.invokeLater(new Runnable() {
public void run() {
progressBar.setString(message);
}
});
}
private void displayError(final String errorMessage){
// Print message to Java console too in case it's truncated in the applet's display
System.err.println(errorMessage);
SwingUtilities.invokeLater(new Runnable() {
public void run() {
progressBar.setString("Error : " + errorMessage);
}
});
}
private void setProgress(final int value) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
progressBar.setValue(value);
}
});
}
private void initLoaderLayout(){
setLayout(new BorderLayout());
progressBar.setBorderPainted(true);
progressBar.setStringPainted(true);
progressBar.setString("Loading...");
boolean includeImage = false;
ImageIcon image = null;
if (subAppletImageName != null){
try {
image = new ImageIcon(new URL(subAppletImageName));
includeImage = true;
} catch (MalformedURLException ex) {
ex.printStackTrace();
// not blocking
}
}
if (includeImage){
add(loaderPanel, BorderLayout.SOUTH);
loaderPanel.add(new JLabel(image), BorderLayout.CENTER);
loaderPanel.add(progressBar, BorderLayout.SOUTH);
} else {
add(loaderPanel, BorderLayout.SOUTH);
loaderPanel.add(progressBar, BorderLayout.CENTER);
}
}
/** start asynchroneous loading of libraries if needed */
public void start(){
if (isInitOk){
if (firstStart) {
firstStart = false;
String userHome = System.getProperty("user.home");
try {
// We need to load in the jogl package so that we can query the version information
ClassLoader classloader = getClass().getClassLoader();
classloader.loadClass("javax.media.opengl.GL");
Package p = Package.getPackage("javax.media.opengl");
String installDirName = userHome + File.separator + ".jogl_ext"
+ File.separator + installDirectory + File.separator + p.getImplementationVersion().replace(':', '_');
final File installDir = new File(installDirName);
Thread refresher = new Thread() {
public void run() {
refreshJOGL(installDir);
}
};
refresher.setPriority(Thread.NORM_PRIORITY - 1);
refresher.start();
}
catch (ClassNotFoundException e) {
System.err.println("Unable to load javax.media.opengl package");
System.exit(0);
}
} else if (joglStarted) {
checkNoDDrawAndUpdateDeploymentProperties();
// we have to start again the applet (start can be called multiple times,
// e.g once per tabbed browsing
subApplet.start();
}
}
}
public void stop(){
if (subApplet != null){
subApplet.stop();
}
}
public void destroy(){
if (subApplet != null){
subApplet.destroy();
}
}
/** Helper method to make it easier to call methods on the
sub-applet from JavaScript. */
public Applet getSubApplet() {
return subApplet;
}
private boolean checkOSAndArch(String osName, String osArch) {
for (int i = 0; i < allNativeLibInfo.length; i++) {
NativeLibInfo info = allNativeLibInfo[i];
if (info.matchesOSAndArch(osName, osArch)) {
nativeLibInfo = info;
return true;
}
}
return false;
}
private void checkNoDDrawAndUpdateDeploymentProperties() {
if (System.getProperty("os.name").toLowerCase().startsWith("windows") &&
!"true".equalsIgnoreCase(System.getProperty("sun.java2d.noddraw"))) {
if (!SwingUtilities.isEventDispatchThread()) {
try {
SwingUtilities.invokeAndWait(new Runnable() {
public void run() {
updateDeploymentPropertiesImpl();
}
});
} catch (Exception e) {
}
} else {
updateDeploymentPropertiesImpl();
}
}
}
private void updateDeploymentPropertiesImpl() {
String userHome = System.getProperty("user.home");
File dontAskFile = new File(userHome + File.separator + ".jogl_ext" +
File.separator + DONT_ASK);
if (dontAskFile.exists())
return; // User asked us not to prompt again
int option = JOptionPane.showOptionDialog(null,
"For best robustness of JOGL applets on Windows,\n" +
"we recommend disabling Java2D's use of DirectDraw.\n" +
"This setting will affect all applets, but is unlikely\n" +
"to slow other applets down significantly. May we update\n" +
"your deployment.properties to turn off DirectDraw for\n" +
"applets? You can change this back later if necessary\n" +
"using the Java Control Panel, Java tab, under Java\n" +
"Applet Runtime Settings.",
"Update deployment.properties?",
JOptionPane.YES_NO_CANCEL_OPTION,
JOptionPane.QUESTION_MESSAGE,
null,
new Object[] {
"Yes",
"No",
"No, Don't Ask Again"
},
"Yes");
if (option < 0 ||
option == 1)
return; // No
if (option == 2) {
try {
dontAskFile.createNewFile();
} catch (IOException e) {
}
return; // No, Don't Ask Again
}
try {
// Must update deployment.properties
File propsDir = new File(System.getProperty("user.home") + File.separator +
"Application Data/Sun/Java/Deployment");
if (!propsDir.exists())
// Don't know what's going on or how to set this permanently
return;
File propsFile = new File(propsDir, "deployment.properties");
if (!propsFile.exists())
// Don't know what's going on or how to set this permanently
return;
Properties props = new Properties();
InputStream input = new BufferedInputStream(new FileInputStream(propsFile));
props.load(input);
input.close();
// Search through the keys looking for JRE versions
Set/*