Initial revision

3 files changed, 1783 insertions, 0 deletions

diff --git a/gl4java/awt/GLAnimCanvas.java b/gl4java/awt/GLAnimCanvas.java
new file mode 100644
index 0000000..77fd21f
--- /dev/null
+++ b/gl4java/awt/GLAnimCanvas.java
@@ -0,0 +1,686 @@
+/**
+ * @(#) GLAnimCanvas.java
+ */
+
+package gl4java.awt;
+
+import gl4java.GLContext;
+
+import java.awt.*;
+import java.awt.event.*;
+import java.lang.Math;
+
+
+/**
+ * This is meant as an base class writing
+ * Animations. A clean usage of multi-threading compatible
+ * with JAVA2 is implemented here !
+ *
+ * <p>
+ *
+ * If you are interessting in further Documentation and/or
+ * the history of GL4Java follow the following link.
+ * 
+ * <pre>
+        <a href="../../GL4Java.html">The GL4Java Documentation</a>
+ * </pre>
+ * <p>
+ *
+ * This code uses repaint() to fire a sDisplay call by the AWT-Event thread !
+ * and sleep to suspend for a given Frames per secounds value as default !!
+ *
+ * To switch this behavior for a better performance, and responsiveness
+ * so that sDisplay is called by the animation thread itself
+ * call:
+ *
+ * <pre>
+        <a href="GLAnimCanvas.html#setUseRepaint(boolean)">setUseRepaint(false)</a>
+ * </pre>
+ * <p>
+ *
+ * This code sleep's for a given Frames per secounds after each frame 
+ * as default !!
+ *
+ * To switch this behavior for a better performance,
+ * so that much frames are rendered as the machine can do !
+ * call:
+ *
+ * <pre>
+        <a href="GLAnimCanvas.html#setUseFpsSleep(boolean)">setUseFpsSleep(false)</a>
+ * </pre>
+ * <p>
+ * But be sure, that the other threads may not have enough time or i
+ * may not get the cpu power ...
+ *
+ * The following settings for setUseRepaint and setUseFpsSleep looks fine:
+ *
+ * <pre>
+ 	<p>
+	A JVM with operating system threads has: <b>native-threads</b>
+ 	<p>
+	A JVM where all JVM threads runs in one operating-system-thread
+	has: <b>green-threads</b>
+
+	<a name="table">
+	<table border>
+	<tr>
+	<th><th>green-threads<th>native-threads
+	<tr>
+	<td align=center><a href="GLAnimCanvas.html#setUseRepaint(boolean)"><code>setUseRepaint</code></a>
+	<td align=center><code>true</code>
+	<td align=center><code> true & false </code>
+	<tr>
+	<td align=center><a href="GLAnimCanvas.html#setUseFpsSleep(boolean)"><code>setUseFpsSleep</code></a>
+	<td align=center><code>true</code>
+	<td align=center><code> true & false </code>
+
+	</table>
+	</a>
+ * </pre>
+ *
+ * If you play with setUseRepaint or setUseFpsSleep, 
+ * be shure to have a Java VM with native-thread support,
+ * because a GL-Context can be shared by many threads,
+ * but one thread can have just one GL-Context !
+ *
+ * (comments welcome)
+ * 
+ * <p>
+ * To use real fps settings, the following functions provides you to do so:
+ * <pre>
+        <a href="GLAnimCanvas.html#setAnimateFps(double, int)">setAnimateFps</a>
+        <a href="GLAnimCanvas.html#getMaxFps()">getMaxFps</a>
+ * </pre>
+ * Like the first animation run, this class renders a view frames (default 10)
+ * to subtract the render time from the sleep time !
+ * <p>
+ * You should overwrite the following methods for your needs:
+ * <pre>
+        <a href="GLAnimCanvas.html#init()">init - 1st initialisation</a>
+        <a href="GLAnimCanvas.html#display()">display - render one frame</a>
+        <a href="GLCanvas.html#reshape(int, int)">reshape - to reshape (window resize)</a>
+        <a href="GLAnimCanvas.html#ReInit()">ReInit - ReInitialisation after stop for setSuspended(false)</a>
+ * </pre>
+ *
+ * @see GLCanvas
+ * @version         2.0, 21. April 1999
+ * @author      Sven Goethel
+ * 
+ */
+public class GLAnimCanvas extends GLCanvas
+  implements Runnable
+{
+        /**
+         * To support frames per scounds,
+         * instead of killing the machine :-)
+         *
+         * A little GUI is supported !
+         *
+         * @see GLAnimCanvas#run    
+         */
+        protected double FramesPerSec=20;
+        protected long   mSecPerFrame=0;
+
+	/**
+	 * the delays ..
+	 */
+	protected long dFpsMilli  = 0;
+                                                                     
+        /**
+         * The thread  for  referencing Thread (Animation)
+         *
+         * @see GLAnimCanvas#stop
+         * @see GLAnimCanvas#start
+         * @see GLAnimCanvas#run
+         */      
+        protected Thread killme = null;
+
+        /**
+         * Instead of using suspend (JAVA2)
+         *
+         * @see GLAnimCanvas#run
+         */      
+        protected boolean threadSuspended = false;
+
+        static {
+	    if(GLContext.loadNativeLibraries(null, null, null)==false)
+	      System.out.println("GLAnimCanvas could not load def. native libs.");
+        }
+
+        /**
+         *
+         * Constructor
+         *
+         * @see GLCanvas#GLCanvas
+         *
+         */
+        public GLAnimCanvas( int width, int height,
+                                  String gl_Name, 
+                                  String glu_Name
+                           )
+        {
+                super( width, height, gl_Name, glu_Name );
+		setAnimateFps(FramesPerSec);
+        }
+
+        /**
+         *
+         * Constructor
+         *
+         * Uses the default GLFunc and GLUFunc implementation !
+         *
+         * @see GLCanvas#GLCanvas
+         *
+         */
+        public GLAnimCanvas( int width, int height )
+        {
+                super( width, height);
+		setAnimateFps(FramesPerSec);
+        }
+
+         /** 
+          *  init should be overwritten by you,
+          *  to enter your initialisation code
+          *
+          */
+        public void init() 
+        {
+                /* here we should add and initialize our JAVA components */
+
+                /* ... and furthet OpenGL init's - like you want to */
+
+                glj.gljCheckGL();
+
+                ReInit();
+
+                /* and start our working thread ... */
+                start();
+        }
+
+        /**
+         *
+         * This is the rendering-method called by sDisplay 
+         * (and sDisplay is called by paint, or by the thread directly !).
+         * The derived-class (Your Subclass) will redefine this, 
+         * to draw it's own animation !
+	 *
+         * <p>
+         *
+         * You should set shallWeRender here,
+         * to signalize the animation-loop 'run' to supsend
+         * <p>
+         * To restart the thread, just call setSuspended(false)
+         *
+         * @see GLAnimCanvas#shallWeRender
+         * @see GLAnimCanvas#run
+         * @see GLAnimCanvas#setSuspended
+         * @see GLCanvas#sDisplay
+         * @see GLCanvas#paint
+         */ 
+         public void display()
+         {
+		  int i;
+
+		  /* Standard GL4Java Init */
+		  if( cvsIsInit()==false )
+		  {
+		      if(glj.gljClassDebug)
+		         System.out.println("GLAnimCanvas not initialized yet ...");
+			return;
+		  }
+
+		  if( glj.gljMakeCurrent(true) == false ) 
+		  {
+		      if(glj.gljClassDebug)
+			 System.out.println("GLAnimCanvas problem in gljMakeCurrent() method");
+			return;
+		  }
+
+		  // ... just render it
+
+		  /* For your animation dutys ;-) */
+		  glj.gljSwap();
+		  glj.gljCheckGL();
+		  glj.gljFree();
+         }
+
+        /**
+         * ReInit should be overwritten by you,
+         * to enter your re-initialisation within setSuspended(false) 
+         * 
+         * @see GLAnimCanvas#setSuspended
+         */
+        public void ReInit()
+        {
+        }
+
+        protected boolean useRepaint = true;
+
+        protected boolean useFpsSleep = true;
+
+        /**
+         * The normal behavior is to use 'repaint'
+         * within the AWT-Event Thread to render.
+         * <p>
+         * If you have serious reasons, e.g. measuring performance,
+         * you can change it while invoke this function with 'false'.
+         * In this case, the thread itself calls the sDisplay method !
+	 * 
+	 * On fast good multi-threading machines (native-thread-JVM), 
+	 * this should increase the performance and the responsiveness !
+         * <p>
+         * 
+         * @param b if true, uses repaint (default), otherwise directly sDisplay
+         * @see GLCanvas#sDisplay
+         * @see GLAnimCanvas#setUseFpsSleep
+         */
+        public void setUseRepaint(boolean b)
+        {
+                useRepaint = b;
+        }
+
+        /**
+         * The normal behavior is to use FpsSleep
+	 *
+         * But you can overwrite this behavior and 
+	 * drop the Frame Per Secound sleeps -
+	 * so that much frames are rendered as the machine can do !
+         * <p>
+         * 
+         * @param b if true, uses Fps sleeping, else not !
+         * @see GLCanvas#sDisplay
+         * @see GLAnimCanvas#setUseRepaint
+         */
+        public void setUseFpsSleep(boolean b)
+        {
+	     useFpsSleep = b;
+        }
+
+        public boolean getUseRepaint()
+        {
+                return useRepaint;
+        }
+
+        public boolean getUseFpsSleep()
+        {
+                return useFpsSleep;
+        }
+
+         /** 
+          *  HERE WE DO HAVE OUR RUNNING THREAD !
+          *  WE NEED STUFF LIKE THAT FOR ANIMATION ;-)
+          */
+        public void start() 
+        {
+            if(killme == null) 
+            {
+              killme = new Thread(this);
+              killme.start();
+
+              resetFpsCounter();
+            }
+        }
+
+        public synchronized void stop() 
+        {
+            killme = null;
+            threadSuspended=false;
+            notify();
+        }
+
+        /**
+         * Should be set in display,
+         * whether to render or not while the animation loop
+         * <p>
+         * If shallWeRender is false,
+         * this thread will suspend !
+         *
+         * @see GLAnimCanvas#display
+         * @see GLAnimCanvas#run
+         */
+        protected boolean shallWeRender = true;
+
+	private long _fDelay = 0;
+	private long _fDelay_Frames = 10;
+	private boolean _fDelaySync=true;
+	private boolean _fDelayRun=false;
+
+         /** 
+          *  The running loop for animations
+          *  which initiates the call of display
+          *
+          * @see GLAnimCanvas#shallWeRender
+          * @see GLAnimCanvas#display
+          * @see GLAnimCanvas#diplay
+          */
+        public void run() 
+        {
+            Thread thisThread = Thread.currentThread();
+
+
+            while (killme==thisThread)
+            {
+		  if(cvsIsInit())
+		  {
+			  /* DRAW THE TINGS .. */
+			  if (shallWeRender) 
+			  {
+			      if(useRepaint)
+				      repaint();
+			      else 
+				      sDisplay();
+			  } else {
+			      // lets sleep ...
+			      synchronized (this) {
+				      threadSuspended=true;
+			      }
+			  }
+
+			  if(fps_isCounting) 
+				fps_frames++; 
+
+		  }
+
+		  try {
+		       if(useFpsSleep)
+		       {
+		          if(useRepaint)
+			  {
+				  if(mSecPerFrame<_f_dur)
+				        dFpsMilli=_f_dur;
+				  else
+					dFpsMilli=mSecPerFrame;
+			  }
+			  else 
+			  {
+				  dFpsMilli= mSecPerFrame - _f_dur;
+			          if (dFpsMilli<=0)
+					dFpsMilli= 1;
+			   } 
+
+                          Thread.currentThread().sleep(dFpsMilli, 0 );
+                       }
+
+                       if (threadSuspended) {
+                           stopFpsCounter();
+                           synchronized (this) {
+                                while (threadSuspended)
+                                        wait();
+                           }
+                       } 
+		  } catch (InterruptedException e)
+	          {}
+            }
+        }
+
+         /** 
+          *  Here we can (re)start or suspend animation ...
+	  *
+	  * If the thread should be (re)started and is not alive -> killed, 
+	  * or never be started, it will be started !
+	  *
+	  * @param suspend  if true the thread will be suspended,
+	  *                 if false, the thread will be (re)started
+	  *
+          * @see GLAnimCanvas#isAlive
+          * @see GLAnimCanvas#start
+          */
+        public void setSuspended(boolean suspend)
+        {
+		setSuspended(suspend, false);
+        }
+
+         /** 
+          *  Here we can (re)start or suspend animation ...
+	  *
+	  * If the thread should be (re)started and is not alive -> killed, 
+	  * or never be started, it will be started !
+	  *
+	  * @param suspend  if true the thread will be suspended,
+	  *                 if false, the thread will be (re)started
+	  *
+	  * @param reInit   if true the ReInit will be called additionally,
+	  *                 where the user can set additional initialisations
+	  *
+          * @see GLAnimCanvas#isAlive
+          * @see GLAnimCanvas#start
+          */
+        public synchronized void setSuspended(boolean suspend, boolean reInit)
+        {
+	    if(suspend) {
+		    shallWeRender=false;
+	    } else if(isAlive()==false) {
+		    start();
+	    } else {
+	            // the thread is alive, but suspended and should be 
+		    // re-started
+		    shallWeRender=true;
+		    resetFpsCounter();
+
+		    if(reInit)
+			    ReInit();
+
+		    threadSuspended=false;
+		    notify();
+	    }
+        }
+
+        /**
+         * is the thread alive, means is started and not died ?
+         *
+         * @see GLAnimCanvas#run
+         * @see GLAnimCanvas#setSuspended
+         * @see GLAnimCanvas#start
+         * @see GLAnimCanvas#stop
+         */      
+        public boolean isAlive()
+	{ 
+		if(killme==null) return false;
+		return killme.isAlive();
+	}
+
+        /**
+         * is the thread suspended, means is started but waiting, 
+	 * or not alive (ok :-| - but it is practical)
+         *
+         * @see GLAnimCanvas#run
+         * @see GLAnimCanvas#setSuspended
+         * @see GLAnimCanvas#start
+         * @see GLAnimCanvas#stop
+         */      
+        public boolean isSuspended()
+	{ 
+		if(killme==null) return true;
+		return threadSuspended;
+	}
+
+        private double  fps=0;            // frame-per-sec
+        private long    fps_duration =0;  // milli-secs
+        private long    fps_start=0;      // milli-secs
+        private long    fps_frames =0;    // number of frames
+        private boolean fps_isCounting =true; // shall i count
+        private boolean verboseFps =false; // shall i be verbose
+
+        /**
+         * resets the Fps Counter
+         * <p>
+         * this function is called automatically by
+         * start and setSuspended
+         *
+         * @see GLAnimCanvas#start
+         * @see GLAnimCanvas#setSuspended
+         * @see GLAnimCanvas#resetFpsCounter
+         * @see GLAnimCanvas#stopFpsCounter
+         * @see GLAnimCanvas#getFps
+         * @see GLAnimCanvas#getFpsDuration
+         * @see GLAnimCanvas#getFpsFrames
+         * @see GLAnimCanvas#setVerboseFps
+         */
+        public void resetFpsCounter()
+        {
+		fps=0;            // frame-per-sec
+		fps_duration =0;  // milli-secs
+		fps_frames =0;    // number of frames
+		fps_isCounting =true; // shall i count
+                fps_start=System.currentTimeMillis();    
+        }
+
+        /**
+         * stops the Fps Counter and sets all values
+         * fot the getFps* methods
+         * <p>
+         * this function is called automatically by
+         * run, if the thread is suspended via shallWeRender
+         * <p>
+         * All data's are print out on System.out 
+         * if verboseFps is set !
+         *
+         * @see GLAnimCanvas#run
+         * @see GLAnimCanvas#shallWeRender
+         * @see GLAnimCanvas#resetFpsCounter
+         * @see GLAnimCanvas#stopFpsCounter
+         * @see GLAnimCanvas#getFps
+         * @see GLAnimCanvas#getFpsDuration
+         * @see GLAnimCanvas#getFpsFrames
+         * @see GLAnimCanvas#setVerboseFps
+         */
+        public void stopFpsCounter()
+        {
+           if(fps_isCounting==true)
+           {
+                long fps_end=System.currentTimeMillis();
+                fps_duration = fps_end-fps_start;
+                double timed= ((double)fps_duration)/1000.0;
+                if(timed==0) timed=1.0;
+                fps  = ((double)fps_frames)/timed ;     
+                fps_isCounting=false;
+           }
+           if(verboseFps)
+           {
+                System.out.println("\nfps    = "+String.valueOf(fps));
+                System.out.println("time   = "+String.valueOf(fps_duration)+" ms");
+                System.out.println("frames = "+String.valueOf(fps_frames));
+		if(fps_frames==0) fps_frames=1;
+                System.out.println("time/f = "+String.valueOf(fps_duration/fps_frames)+" ms");
+           }
+        }
+
+        /**
+         * sets if the Fps data shall be printed to System.out
+         * while stopFpsCounter is called !
+         * <p>
+         * verboseFps is set to true by default !
+         *
+         * @see GLAnimCanvas#run
+         * @see GLAnimCanvas#shallWeRender
+         * @see GLAnimCanvas#resetFpsCounter
+         * @see GLAnimCanvas#stopFpsCounter
+         * @see GLAnimCanvas#getFps
+         * @see GLAnimCanvas#getFpsDuration
+         * @see GLAnimCanvas#getFpsFrames
+         * @see GLAnimCanvas#setVerboseFps
+         */
+        public void setVerboseFps(boolean v)
+        {
+                verboseFps=v;
+        }
+
+        /**
+         * returns the calculated frames per secounds
+         * <p>
+         * this data is avaiable after calling stopFpsCounter
+         *
+         * @see GLAnimCanvas#resetFpsCounter
+         * @see GLAnimCanvas#stopFpsCounter
+         * @see GLAnimCanvas#getFps
+         * @see GLAnimCanvas#getFpsDuration
+         * @see GLAnimCanvas#getFpsFrames
+         * @see GLAnimCanvas#setVerboseFps
+         */
+        public double getFps()
+        {
+                return fps;
+        }
+
+        /**
+         * returns the calculated duration in millisecs
+         * <p>
+         * this data is avaiable after calling stopFpsCounter
+         *
+         * @see GLAnimCanvas#resetFpsCounter
+         * @see GLAnimCanvas#stopFpsCounter
+         * @see GLAnimCanvas#getFps
+         * @see GLAnimCanvas#getFpsDuration
+         * @see GLAnimCanvas#getFpsFrames
+         * @see GLAnimCanvas#setVerboseFps
+         */
+        public long getFpsDuration()
+        {
+                return fps_duration;
+        }
+
+        /**
+         * returns the calculated frames number
+         * <p>
+         * this data is avaiable after calling stopFpsCounter
+         *
+         * @see GLAnimCanvas#resetFpsCounter
+         * @see GLAnimCanvas#stopFpsCounter
+         * @see GLAnimCanvas#getFps
+         * @see GLAnimCanvas#getFpsDuration
+         * @see GLAnimCanvas#getFpsFrames
+         * @see GLAnimCanvas#setVerboseFps
+         */
+        public long getFpsFrames()
+        {
+                return fps_frames;
+        }
+
+         /** 
+          * Just set the FramePerSecounds for Animation
+	  *
+	  * @deprecated Now the frames per seconds are allways 
+	  * calculated, no pre-sync needed.
+          * @see #setAnimateFps(double)
+          */
+        public void setAnimateFps(double fps, int synFrames)
+        {
+		setAnimateFps(fps);
+	}
+
+         /** 
+          * Just set the FramePerSecounds for Animation
+	  *
+          * @see GLAnimCanvas#getMaxFps    
+          */
+        public void setAnimateFps(double fps)
+        {
+		FramesPerSec=fps;
+	        mSecPerFrame = (long) ( (1.0/FramesPerSec) * 1000.0 ) ;
+                if(verboseFps)
+                {
+			System.out.println("\nset fps    := "+
+			                   String.valueOf(fps)+
+					   " -> "+String.valueOf(mSecPerFrame)+
+					   " [ms/frame]"
+					  );
+		}
+                resetFpsCounter();
+	}
+
+         /** 
+          * Just get the maximum number of Frames per secounds,
+	  * which is calculated with the time, one frame needs to render !
+	  *
+	  * this value is avaiable after the thread is started
+	  * and the first frames are rendered !
+	  *
+          * @see GLAnimCanvas#setAnimateFps    
+          */
+        public double getMaxFps()
+        {
+		return  (1.0/(double)_f_dur)*1000.0;
+        }
+
+}
+
diff --git a/gl4java/awt/GLCanvas.java b/gl4java/awt/GLCanvas.java
new file mode 100644
index 0000000..4a537f9
--- /dev/null
+++ b/gl4java/awt/GLCanvas.java
@@ -0,0 +1,695 @@
+/**
+ * @(#) GLCanvas.java
+ */
+
+
+package gl4java.awt;
+
+import gl4java.*;
+
+import java.awt.*;
+import java.awt.event.*;
+
+/**
+ * This is meant as an base class writing
+ * easy render functions. A clean usage of multi-threading compatible
+ * with JAVA2 is implemented in GLAnimCanvas !
+ *
+ * <p>
+ *
+ * If you are interessting in further Documentation and/or
+ * the history of GL4Java follow the following link.
+ * 
+ * <pre>
+	<a href="../../GL4Java.html">The GL4Java Documentation</a>
+ * </pre>
+ * <p>
+ *
+ * You should overwrite the following methods for your needs:
+ * <pre>
+        <a href="GLCanvas.html#init()">preInit - initialisation before creating GLContext</a>
+        <a href="GLCanvas.html#init()">init - 1st initialisation after creating GLContext</a>
+        <a href="GLCanvas.html#doCleanup()">doCleanup - OGL cleanup prior to context deletion</a>
+        <a href="GLCanvas.html#display()">display - render your frame</a>
+	<a href="GLCanvas.html#reshape(int, int)">reshape - to reshape (window resize), gljResize() is allready invoked !</a>
+ * </pre>
+ *
+ * To check if you can use the GLContext and GL and GLU methods,
+ * use the function
+ * <pre>
+        <a href="GLCanvas.html#cvsIsInit()">cvsIsInit</a>
+ * </pre>
+ * <p>  
+ * IF you remove/release a GLCanvas,
+ * e.g. you want to close/dispose it�s Window (which contains this GLCanvas),
+ * you HAVE TO call:
+ *
+ * <pre>
+        <a href="GLCanvas.html#cvsDispose()">cvsDispose</a>
+ * </pre>
+ * You should call this before releasing/dispose this Window ! 
+ * Also you can overwrite this class,
+ * to dispose your own elements, e.g. a Frame etc. - 
+ * but be shure that you call
+ * cvsDispose implementation call this one !
+ * 
+ * <p>  
+ * We do override the following Canvas methods.
+ *
+ * <pre>
+        <a href="GLCanvas.html#update(java.awt.Graphics)">update</a>
+        <a href="GLCanvas.html#paint(java.awt.Graphics)">paint</a>
+ * </pre>
+ * <p>        
+ *
+ * @see GLAnimCanvas
+ * @version 	2.0, 21. April 1999
+ * @author      Sven Goethel
+ * 
+ */
+public class GLCanvas extends Canvas
+	implements GLEnum, GLUEnum,
+		   ComponentListener, WindowListener, MouseListener
+{
+    protected GLContext glj = null;
+    public GLFunc gl = null;
+    public GLUFunc glu = null;
+
+    protected Dimension size = null;
+    protected boolean mustResize = false;
+
+    protected boolean cvsInitialized=false;
+
+    protected boolean needCvsDispose = false;
+
+    /**
+     * Visual pre-set for doubleBuffer, default: true
+     * This value is updated after a GLContext is created with the
+     * original updated value of GLContext !
+     *
+     * @see GLCanvas#preInit
+     * @see GLCanvas#paint
+     */
+    protected boolean doubleBuffer = true;
+
+    /**
+     * Visual pre-set for stencil-bit number, default: 0
+     * This value is updated after a GLContext is created with the
+     * original updated value of GLContext !
+     *
+     * @see GLCanvas#preInit
+     * @see GLCanvas#paint
+     */
+    protected int stencilBits = 0;
+
+    /**
+     * Visual pre-set for accumulator buffer size, default: 0
+     * This value is updated after a GLContext is created with the
+     * original updated value of GLContext !
+     *
+     * This value has a special behavior.
+     * For input - within the contructor,
+     * it is the value for each component !
+     *
+     * The output value, after the constructor returns,
+     * it is the summary of all accumulation bits of all components !
+     *
+     * @see GLCanvas#preInit
+     * @see GLCanvas#paint
+     */
+    protected int accumSize = 0;
+
+    /**
+     * Visual pre-set for stereoView, default: false
+     * This value is updated after a GLContext is created with the
+     * original updated value of GLContext !
+     *
+     * @see GLCanvas#preInit
+     * @see GLCanvas#paint
+     */
+    protected boolean stereoView = false;
+
+   /**
+    * Visual pre-set for RGBA usage, default: true - of course ;-)
+    * This value is updated after a GLContext is created with the
+    * original updated value of GLContext !
+    *
+    * @see GLCanvas#preInit
+    * @see GLCanvas#paint
+    */
+    protected boolean rgba = true;    
+
+   /**
+    * Visual pre-set for RGBA usage, default: true - of course ;-)
+    * This value is updated after a GLContext is created with the
+    * original updated value of GLContext !
+    *
+    * @see GLCanvas#preInit
+    * @see GLCanvas#paint
+    */
+    protected boolean createOwnWindow = false;
+
+   /**
+    * The context with witch display lists and textures will be shared.
+    *
+    * @see GLCanvas#preInit
+    * @see GLCanvas#paint
+    */
+    protected GLContext sharedGLContext;	
+
+    static {
+	if(GLContext.loadNativeLibraries(null, null, null)==false)
+	  System.out.println("GLCanvas could not load def. native libs.");
+    }
+
+    /**
+     *
+     * Constructor
+     *
+     * @param width    	the canvas initial-prefered width
+     * @param height   	the canvas initial-prefered height
+     *
+     * @param gl_Name     The name of the GLFunc implementation
+     *                    If gl_Name==null, the default class will be used !
+     *
+     * @param glu_Name    The name of the GLUFunc implementation
+     *                    If gl_LibName==null, the default class will be used !
+     *
+     */
+    public GLCanvas( int width, int height,
+     	               String gl_Name, 
+     	               String glu_Name
+		     )
+    {
+	super( );
+
+	if( (gl=GLContext.createGLFunc(gl_Name)) ==null)
+	{
+	  System.out.println("GLFunc implementation "+gl_Name+" not created");
+	}
+	if( (glu=GLContext.createGLUFunc(glu_Name)) ==null)
+	{
+	  System.out.println("GLUFunc implementation "+glu_Name+" not created");
+	}
+
+	size = new Dimension(width, height);
+
+	setSize(size);
+
+	/* to be able for RESIZE event's */
+	addComponentListener(this);
+	addMouseListener(this);
+    }
+
+    /**
+     *
+     * Constructor
+     *
+     * Uses the default GLFunc and GLUFunc implementation !
+     *
+     * @param width    	the canvas initial-prefered width
+     * @param height   	the canvas initial-prefered height
+     *
+     */
+    public GLCanvas( int width, int height )
+    {
+	this(width, height, null, null);
+    }
+
+    /* GLCanvas AWT classes */
+
+    public Dimension getPreferredSize() {
+        return getMinimumSize();
+    }
+
+    public Dimension getMinimumSize() {
+        return size;
+    }
+
+    /**
+     * Used to return the created GLContext
+     */
+    public final GLContext getGLContext() { return glj; }
+
+    /**
+     *
+     * Overridden update
+     * This one only call's the paint method, without clearing
+     * the background - thats hopefully done by OpenGL ;-)
+     *
+     * @param g		the Graphics Context
+     * @return 		void
+     *
+     * @see	GLCanvas#paint
+     */ 
+    public void update(Graphics g)
+    {
+        /* let's let OpenGL clear the background ... */
+	paint(g);
+    }
+
+    /**
+     * Safe the toplevel window
+     */ 
+    protected Window topLevelWindow = null;
+
+    /**
+     *
+     * This function returns the found TopLevelWindow,
+     * which contains this Canvas ..
+     *
+     * @return 		void
+     *
+     * @see	GLCanvas#paint
+     */ 
+    public final Window getTopLevelWindow()
+    { return topLevelWindow; }
+
+    /**
+     * this function overrides the Canvas paint method !
+     *
+     * For the first paint, 
+     * the user function preInit is called, a GLContext is created
+     * and the user function init is called !
+     *
+     * Also, if a GL Context exist, GLCanvas's sDisplay-method will be called
+     * to do OpenGL-rendering. 
+     *
+     * The sDisplay method itself calls the display-method !
+     * sDisplay is needed to be thread-safe, to manage 
+     * the resize functionality and to safe the time per frame.
+     *
+     * To define your rendering, you should overwrite the display-method
+     * in your derivation.
+     *
+     * @see gl4java.GLContext#GLContext
+     * @see GLCanvas#cvsIsInit
+     * @see GLCanvas#sDisplay
+     * @see GLCanvas#display
+     * @see GLCanvas#preInit
+     * @see GLCanvas#init
+     */
+    public synchronized final void paint( Graphics g )
+    {
+	if(glj == null )
+	{
+		preInit();
+		glj = new GLContext ( this, gl, glu, 
+                                      createOwnWindow,
+		                      doubleBuffer, stereoView,
+				      rgba, stencilBits, accumSize,
+				      sharedGLContext );
+
+		if(glj!=null)
+		{
+			createOwnWindow = glj.isOwnWindowCreated();
+			doubleBuffer = glj.isDoubleBuffer();
+			stencilBits = glj.getStencilBitNumber();
+			accumSize = glj.getAccumSize();
+			stereoView = glj.isStereoView();
+			rgba = glj.isRGBA();
+		}
+
+		init();
+
+		// fetch the top-level window ,
+		// to add us as the windowListener
+		//
+		Container _c = getParent();
+		Container  c = null;
+
+		while(_c!=null)
+		{
+			c = _c;
+			_c = _c.getParent();
+		}
+
+		if(c instanceof Window) {
+			topLevelWindow = (Window)c;
+	                topLevelWindow.addComponentListener(this);
+		} else {
+			topLevelWindow = null;
+		        System.out.println("toplevel is not a Window: "+c);
+		}
+
+		if(topLevelWindow!=null)
+		{
+		      topLevelWindow.addWindowListener(this);
+		} else {
+		      System.out.println("no parent found for "+getName());
+		      System.out.flush();
+		}
+		if(glj!=null && glj.gljIsInit())
+			cvsInitialized=true;
+	} 
+	/*
+	if( mustResize ) size = getSize();
+	g.setClip(0, 0, size.width, size.height ) ;
+	*/
+	sDisplay();
+    }
+
+    /**
+     *
+     * This is your pre-init method.
+     * preInit is called just BEFORE the GL-Context is created.
+     * You should override preInit, to initialize your visual-stuff,
+     * like the protected vars: doubleBuffer and stereoView
+     *
+     * @return 		void
+     *
+     * @see	GLCanvas#paint
+     * @see	GLCanvas#doubleBuffer
+     * @see	GLCanvas#stereoView
+     * @see	GLCanvas#rgba
+     * @see	GLCanvas#stencilBits
+     * @see	GLCanvas#accumSize
+     */ 
+    public void preInit()
+    {
+    }
+
+    /**
+     *
+     * This is your init method.
+     * init is called right after the GL-Context is initialized.
+     * You should override init, to initialize your stuff needed
+     * by OpenGL an Java !
+     *
+     * @return 		void
+     *
+     * @see	GLCanvas#paint
+     */ 
+    public void init()
+    {
+    }
+
+    /**
+     * This method is used to clean up any OpenGL stuff (delete textures
+     * or whatever) prior to actually deleting the OpenGL context.
+     * You should override this with your own version, if you need to do
+     * any cleanup work at this phase.
+     * This functions is called within cvsDispose
+     *
+     * @return 		void
+     *
+     * @see	GLCanvas#cvsDispose
+     */
+    public void doCleanup()
+    {
+    }
+
+    /**
+     * This function returns, if everything is init: the GLContext,
+     * the and the users init function 
+     * This value is set in the paint method!
+     *
+     * @return 	boolean
+     *
+     * @see	GLCanvas#paint
+     * @see	GLCanvas#init
+     */ 
+    public boolean cvsIsInit()
+    {
+    	return cvsInitialized;
+    }
+
+    protected long _f_dur = 0;
+
+    /**
+     *
+     * This is the thread save rendering-method called by paint.
+     * The actual thread will be set to highes priority befor calling
+     * 'display'. After 'display' the priority will be reset !
+     *
+     * 'gljFree' will be NOT called after 'display'.
+     * 
+     * We tested the above to use multi-threading and
+     * for the demonstration 'glDemos' it works ;-)) !
+     *
+     * BE SURE, if you want to call 'display' by yourself
+     * (e.g. in the run method for animation)
+     * YOU HAVE TO CALL sDisplay  -- OR YOU MUST KNOW WHAT YOU ARE DOING THEN !
+     *
+     * @return 		void
+     *
+     * @see GLCanvas#paint
+     * @see GLCanvas#display
+     */ 
+    public synchronized final void sDisplay()
+    {
+        boolean ok = true;
+
+	long _s = System.currentTimeMillis();
+
+	if(!cvsIsInit())
+		return;
+
+	if( mustResize )
+	{
+	    if( (ok = glj.gljMakeCurrent()) == true )
+	    {
+		size = getSize();
+		glj.gljResize( size.width, size.height ) ;
+	        reshape(size.width, size.height);
+		mustResize = false;
+		invalidate();
+		repaint(100);
+	    }
+	}
+	if(ok) 
+	{
+	        display();
+	}
+
+	_f_dur = System.currentTimeMillis()-_s;
+    }
+
+    /**
+     *
+     * This is the rendering-method called by sDisplay 
+     * (and sDisplay is called by paint !).
+     * The derived-class (Your Subclass) will redefine this, to draw it's own...
+     *
+     * BE SURE, if you want to call 'display' by yourself
+     * (e.g. in the run method for animation)
+     * YOU HAVE TO CALL sDisplay !
+     *
+     * 'sDisplay' manages a semaphore to avoid reentrance of
+     * the display function !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+     *
+     * @return 		void
+     *
+     * @see GLCanvas#sDisplay
+     * @see GLCanvas#paint
+     */ 
+    public void display()
+    {
+    }
+
+    /**
+     *
+     * This is the reshape-method called by paint. 
+     * The derived-class (Your Subclass) will redefine this, 
+     * to manage your individual reshape ...
+     *
+     * This �reshape� method will be invoked after the first paint command
+     * after GLCanvas.componentResize is called AND only if �gljUse� was
+     * succesfull (so a call of gljUse is redundant).
+     * �reshape� is not an overloading of java.awt.Component.reshape,
+     * �reshape� is more like �glut�-reshape.
+     * 
+     * GLCanvas.reshape allready has a simple default implementation,
+     * which calls �gljResize� and �glViewport� - so you may be can
+     * left this one as it is (no need to overload).
+     * The needed call to �gljResize� is done by hte invoker paint !
+     *
+     * @param width		the new width
+     * @param height	the new height
+     * @return 		void
+     *
+     * @see GLCanvas#paint
+     * @see GLCanvas#sDisplay
+     */ 
+    public void reshape( int width, int height )
+    {
+	gl.glViewport(0,0, width, height);
+    }
+
+    /**
+     *
+     * �componentResized� is the componentListeners event handler.
+     *
+     * This method sets the variable �mustResize� to true,
+     * so the upcoming �paint� method-call will invoke �reshape� !
+     *
+     * This little look-alike complicating thing is done,
+     * to avoid an Exception by using the glContext from more than 
+     * one concurrent thread�s !
+     *
+     * You cannot override this implementation, it is final
+     * - override �reshape' instead !
+     *
+     * @param e		the element, which is resized
+     * @return 		void
+     *
+     * @see GLCanvas#paint
+     * @see GLCanvas#reshape
+     */ 
+    public void componentResized(ComponentEvent e)
+    {
+	if(glj!=null && glj.gljIsInit() && e.getComponent()==this )
+	{
+		mustResize = true;
+		repaint();
+	}
+    }
+
+    public void componentMoved(ComponentEvent e)
+    {
+	if(glj!=null && glj.gljIsInit())
+	{
+		repaint(100);
+	}
+    }
+
+    public void componentShown(ComponentEvent e)
+    {
+    }
+
+    public void componentHidden(ComponentEvent e)
+    { }
+
+    public void mouseClicked(MouseEvent e) 
+    {
+	if(glj!=null && glj.gljIsInit())
+	{
+		repaint();
+	}
+    }
+
+    public void mouseEntered(MouseEvent e) 
+    { }
+    public void mouseExited(MouseEvent e) 
+    {}
+    public void mousePressed(MouseEvent e) 
+    {
+    }
+    public void mouseReleased(MouseEvent e) 
+    {
+    }
+
+	public void windowOpened(WindowEvent e)
+	{
+	}
+
+	/**
+	  *
+	  * �windowClosing� is the windowListeners event handler
+	  *  for the topLevelWindow of this Canvas !
+	  *
+	  * This methods free�s AND destroy�s 
+	  * the GL Context with �glj.gljDestroy� !
+  	  *
+	  * @return 		void
+	  *
+	  */ 
+	public void windowClosing(WindowEvent e)
+	{
+		if(e.getComponent().equals(topLevelWindow))
+		{
+		    cvsDispose();
+		}
+	}
+
+	/**
+	*
+	* �windowClosed� is the windowListeners event handler.
+	*
+	* @return 		void
+	*
+	*/ 
+	public void windowClosed(WindowEvent e)
+	{
+        	if (needCvsDispose) cvsDispose();
+	}
+
+	public void windowIconified(WindowEvent e)
+	{
+	}
+
+	public void windowDeiconified(WindowEvent e)
+	{
+	}
+
+	public void windowActivated(WindowEvent e)
+	{
+		if(glj!=null && glj.gljIsInit())
+		{
+			repaint(100);
+		}
+	}
+
+	public void windowDeactivated(WindowEvent e)
+	{
+	}
+
+    /**
+      * You should call this before releasing/dispose this Window ! 
+      * Also you can overwrite this class,
+      * to dispose your own elements, e.g. a Frame etc. - 
+      * but be shure that you call
+      * cvsDispose implementation call this one !
+      * 
+      * This function calls gljDestroy of GLContext !
+      *
+      * @see gl4java.GLContext#gljDestroy
+      * @see GLCanvas#doCleanup
+      */
+    public void cvsDispose()
+    {
+        cvsInitialized = false;
+	if (glj != null)
+	{
+		if (glj.gljIsInit())
+		{
+			/* Sometimes the Microsoft VM calls the
+			   Applet.stop() method but doesn't have
+			   permissions to do J/Direct calls, so
+			   this whole block of code will throw a
+			   security exception.  If this happens,
+			   however, windowClosing() will still
+			   call us again later and we will have
+			   another opportunity to shut down the
+			   context, so it all works out fine. */
+			try
+			{
+				glj.gljFree();
+				doCleanup();
+				//locks and free's GLContext	
+				glj.setEnabled(false); 
+				glj.gljDestroy();
+        			needCvsDispose = false;
+			}
+			catch (Exception ex)
+                	{
+        			needCvsDispose = true;
+                	}
+		}
+	}
+
+	// Setting glj to null will simply cause paint() to re-initialize.
+	// We don't want that to happen, so we will leave glj non-null.
+    }
+
+    /**
+     * get methods
+     */
+    public final int cvsGetWidth() {
+        return getSize().width;
+     }
+    public final int cvsGetHeight() {
+        return getSize().height;
+     }
+}
+
diff --git a/gl4java/awt/GLImageCanvas.java b/gl4java/awt/GLImageCanvas.java
new file mode 100755
index 0000000..113d589
--- /dev/null
+++ b/gl4java/awt/GLImageCanvas.java
@@ -0,0 +1,402 @@
+/**
+ * @(#) GLImageCanvas.java
+ */
+
+
+package gl4java.awt;
+
+import gl4java.*;
+import gl4java.utils.*;
+import gl4java.utils.textures.*;
+
+import java.awt.*;
+import java.net.*;
+
+/**
+ * This Class provides a simple universal
+ * Image/Texture OpenGL Canvas !
+ *
+ * A special demo/application for this class can be found
+ * in "demos/MiscDemos/GLImageViewerCanvas.java" !
+ *
+ * @see TextureLoader
+ * @author      Sven Goethel
+ * 
+ */
+public class GLImageCanvas extends GLCanvas
+{
+   int texName[] = {0};
+   TextureLoader txtLoader = null;
+   boolean newText = false;
+   boolean keepAspect = true;
+   boolean zoomImg = true;
+   
+   TextureGrabber textGrab4Snapshot = null;
+   String         textGrab4SnapshotFName = null;
+   URL            textGrab4SnapshotURL  = null;
+   String         textGrab4SnapshotURI  = null;
+
+    public GLImageCanvas(int w, int h)
+    {
+	super(w, h);
+    }
+
+    public void setKeepAspectRatio(boolean v)
+    { keepAspect=v; }
+
+    public boolean getKeepAspectRatio()
+    { return keepAspect; }
+
+    public void setZoomAble(boolean v)
+    { zoomImg = v; }
+
+    public boolean getZoomAble()
+    { return zoomImg; }
+
+    public TextureLoader getTextureLoader()
+    { return txtLoader; }
+
+    public void setOriginalSize()
+    {
+	    if(txtLoader!=null && txtLoader.isOk())
+	    {
+	    	internalSetSize( txtLoader.getImageWidth(),
+		                 txtLoader.getImageHeight() );
+	    }
+    }
+
+    /**
+     * Creates a snapshot (save texture/image) of the current
+     * GL-Context !
+     *
+     * The snapshot itself is created delayed,
+     * so no return value is avaiable.
+     * Because this is a non critical path, I hope its enough !
+     *
+     * @param tg The TextureGrabber
+     * @param fname The filename
+     * @see TextureGrabber
+     */
+    public void snapshot(TextureGrabber tg, String fname) 
+    {
+    	textGrab4Snapshot=tg;
+	textGrab4SnapshotFName=fname;
+	repaint();
+    }
+
+    /**
+     * Creates a snapshot (save texture/image) of the current
+     * GL-Context !
+     *
+     * The snapshot itself is created delayed,
+     * so no return value is avaiable.
+     * Because this is a non critical path, I hope its enough !
+     *
+     * @param tg The TextureGrabber
+     * @param base The base URL
+     * @param uri  The additional uri for the base URL
+     * @see TextureGrabber
+     */
+    public void snapshot(TextureGrabber tg, URL base, String uri)
+    {
+    	textGrab4Snapshot=tg;
+	textGrab4SnapshotURL  = base;
+	textGrab4SnapshotURI  = uri;
+	repaint();
+    }
+
+    public Dimension getPreferredSize() {
+        return getMinimumSize();
+    }
+
+    public Dimension getMinimumSize() {
+        return getSize();
+    }
+
+    protected void internalSetSize(int w, int h)
+    {
+	setSize( w, h );
+	invalidate();
+
+    	Window holder = Tool.getWindow(this);
+
+	if(holder!=null)
+	{
+		holder.invalidate();
+		holder.pack();
+		holder.repaint();
+	}
+    }
+
+    public void preInit()
+    {
+	// createOwnWindow = true;
+    }
+
+    public void init()
+    {
+	 gl.glEnable(GL_TEXTURE_2D);
+	    
+	 gl.glGenTextures(1,texName);
+	 gl.glBindTexture(GL_TEXTURE_2D,texName[0]);
+	    
+	 gl.glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP);
+	 gl.glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_CLAMP);
+	 gl.glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
+	 gl.glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
+         gl.glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+	
+	 gl.glShadeModel (GL_SMOOTH);
+	
+	 gl.glClearColor(0.2f, 0.2f, 0.2f, 1.0f);
+
+	 reshape(getSize().width, getSize().height);
+    }
+
+    /**
+     * Loads an Image of the appropiate type,
+     * and renders and resizes the complete window !
+     *
+     * @param fname The filename
+     * @param type The type of file, e.g. TextureLoader is used !
+     *             The following types are currently allowed:
+     *             "png" for PngTextureLoader,
+     *             "ppm" for PPMAsciiTextureLoader,
+     *             "tga" for PPMAsciiTextureLoader,
+     *             "any" for AWTTextureLoader !
+     */
+    public boolean loadTexture(String fname, String type)
+    {
+    	return loadTexture(fname, null, null, type);
+    }
+
+    /**
+     * Loads an Image of the appropiate type,
+     * and renders and resizes the complete window !
+     *
+     * @param base The base URL
+     * @param uri  The additional uri for the base URL
+     * @param type The type of file, e.g. TextureLoader is used !
+     *             The following types are currently allowed:
+     *             "png" for PngTextureLoader,
+     *             "ppm" for PPMAsciiTextureLoader,
+     *             "tga" for PPMAsciiTextureLoader,
+     *             "any" for AWTTextureLoader !
+     */
+    public boolean loadTexture(URL base, String uri, String type)
+    {
+    	return loadTexture(null, base, uri, type);
+    }
+
+    protected boolean loadTexture(String fname,
+    				  URL base, String uri, String type)
+    {
+	 boolean ok = true;
+
+	 if( glj.gljMakeCurrent() == false ) 
+	 {
+	      System.out.println("problem in use() method");
+	      return false;
+	 }
+
+	 // texture laden
+	 if(type.equals("png"))
+		 txtLoader = new PngTextureLoader(gl, glu);
+	 else if(type.equals("ppm"))
+		 txtLoader = new PPMAsciiTextureLoader(gl, glu);
+	 else if(type.equals("tga"))
+		 txtLoader = new TGATextureLoader(gl, glu);
+	 else if(type.equals("any"))
+		 txtLoader = new AWTTextureLoader(this, gl, glu);
+	 else {
+		System.out.println("Imagetype: "+type+" is currently not supported !");
+		ok = false;
+	 }
+
+	 if(ok)
+	 {
+		try {
+		   if(fname!=null)
+			txtLoader.readTexture(fname);
+		   else
+			txtLoader.readTexture(base, uri);
+		} catch (Exception ex) {
+			ex.printStackTrace();
+		}
+	 }
+
+	 if(ok && txtLoader.isOk())
+	 {
+	    gl.glEnable(GL_TEXTURE_2D);
+	    
+	    txtLoader.texImage2DNonScaled(true);
+
+	    gl.glDisable(GL_TEXTURE_2D);
+	    System.out.println("texture succesfully loaded !");
+	    System.out.println("texture: "+txtLoader);
+	 }
+	 glj.gljCheckGL();
+	 glj.gljFree();
+	 if(ok) {
+    		internalSetSize( txtLoader.getImageWidth(),
+			         txtLoader.getImageHeight() );
+	 }
+	 return ok;
+    }
+
+    public void display()
+    {
+      int i;
+
+      /* Standard GL4Java Init */
+      if( glj.gljMakeCurrent() == false ) 
+      {
+	System.out.println("problem in use() method");
+	return;
+      }
+
+      SetCamera();
+
+      // just render it
+      gl.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+      DrawObj(false);
+
+      if(textGrab4Snapshot!=null)
+      {
+	  textGrab4Snapshot.grabPixels(GL_BACK, 
+			               0, 0, cvsGetWidth(), cvsGetHeight());
+	  if(textGrab4SnapshotFName!=null)
+		  textGrab4Snapshot.write2File(textGrab4SnapshotFName);
+	  else
+		  textGrab4Snapshot.write2File(textGrab4SnapshotURL,
+		  		               textGrab4SnapshotURI);
+    	  textGrab4Snapshot     =null;
+	  textGrab4SnapshotFName=null;
+	  textGrab4SnapshotURL  =null;
+	  textGrab4SnapshotURI  =null;
+      }
+      
+      /* For your animation dutys ;-) */
+      glj.gljSwap();
+      glj.gljCheckGL();
+      glj.gljFree();
+    }
+
+    /**
+     * to prevent a deadlock in recursive
+     * reshape .. internalSetSize .. pack .. resize -> reshape !
+     */
+    private int reshape_resize_sema = 1;
+
+    public void reshape(int w, int h)
+    {
+        if(reshape_resize_sema>0 &&
+	   keepAspect && txtLoader!=null && txtLoader.isOk())
+	{
+            reshape_resize_sema--;
+
+	    int rw=w; int rh=h;
+	    if(zoomImg)
+	    {
+		double    iaspect = (double)txtLoader.getImageWidth()/
+		                    (double)txtLoader.getImageHeight();
+		if(rw<rh)
+		{
+			h = (int) ((rw / iaspect)+0.5);
+		} else {
+			w = (int) ((rh * iaspect)+0.5);
+		}
+	    } else {
+		w = txtLoader.getImageWidth();
+	        h = txtLoader.getImageHeight();
+	    }
+	    if(rw!=w || rh!=h)
+	    {
+    		internalSetSize( w, h );
+		return ; /* the true resize is coming up ... */
+	    }
+	}
+	reshape_resize_sema=1;
+	gl.glViewport (0, 0, w, h);
+	SetCamera();
+    }
+
+
+    protected void DrawObj(boolean blend)
+    {
+	gl.glPushMatrix();
+	    if(blend)
+	    {
+		 gl.glEnable(GL_BLEND);
+		 gl.glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
+	    }
+
+	    gl.glColor4f(1f,1f,1f,1f);
+
+	    if(txtLoader!=null && txtLoader.isOk())
+	    {
+		    gl.glEnable(GL_TEXTURE_2D);
+		    gl.glBegin(GL_QUADS);
+
+			gl.glNormal3f(0f,0f,1f);
+			gl.glTexCoord2f(0f,0f);
+			gl.glVertex2f(0f, 0f);
+
+			gl.glNormal3f(0f,0f,1f);
+			gl.glTexCoord2f(0f,1f);
+			gl.glVertex2f(0f, 1f);
+			
+			gl.glNormal3f(0f,0f,1f);
+			gl.glTexCoord2f(1f,1f);
+			gl.glVertex2f(1f, 1f);
+
+			gl.glNormal3f(0f,0f,1f);
+			gl.glTexCoord2f(1f,0f);
+			gl.glVertex2f(1f, 0f);
+			
+		    gl.glEnd();
+		    gl.glDisable(GL_TEXTURE_2D);
+	    }
+
+	    if(blend)
+		 gl.glDisable(GL_BLEND);
+
+	gl.glPopMatrix();
+    }
+    
+    protected void SetCamera()
+    {
+      float imgwidth   = 1f;
+      float imgheight  = 1f;
+      float txtdx=0f;
+      float txtdy=0f;
+
+      if(txtLoader!=null && txtLoader.isOk())
+      {
+	      Dimension idim = new Dimension(txtLoader.getImageWidth(),
+	      		                     txtLoader.getImageHeight());
+	      Dimension tdim = new Dimension(txtLoader.getTextureWidth(),
+	      		                     txtLoader.getTextureHeight());
+
+	      imgwidth   = (float)idim.width/(float)tdim.width;
+	      imgheight  = (float)idim.height/(float)tdim.height;
+
+	      /*
+              System.out.println("image : "+idim);
+              System.out.println("text  : "+tdim);
+              System.out.println("image/text : "+imgwidth+"/"+imgheight);
+	      */
+      }
+
+      gl.glMatrixMode (GL_PROJECTION);
+      gl.glLoadIdentity ();
+      glu.gluOrtho2D(0, imgwidth,
+      		     0, imgheight);
+
+      gl.glMatrixMode (GL_MODELVIEW);
+      gl.glLoadIdentity ();
+    }
+
+}
+