Fix Bug 600 and Bug 721: Adding support for multiple monitors w/ NEWT

- Support for all monitor devices and their available modes
  - X11: Use RandR 1.3 if available
  - Retrieve information
  - Changing a monitor device's mode

- Support for dedicated and spannig fullscreen
  - See <http://jogamp.org/files/screenshots/newt-mmonitor/html/>

- TODO:
  - X11 RandR does _not_ relayout the virtual screen size
    and neither the CRT's viewport.
    We may need to relayout them if they were covering a seamless region
    to achieve same experience!

  - OSX: No machine to attach a secondary CRT -> TEST!

- Tested Manually for Regressions
  - Linux ARMv6hf (Rasp-Pi/BCM, Panda/X11)
  - Android (Huawei, Kindle)

- Tested Manually and junit:
  - X11/Linux
    - NV, ATI-Catalyst w/ 2 CRTs
    - VBox w/ 4 CRTs

  - Win/Windows
    - NV, w/ 2 CRTs
    - VBox w/ 4 CRTs

  - X11/OpenIndiana, NV, 1 CRT

6 files changed, 121 insertions, 6 deletions

diff --git a/src/nativewindow/classes/javax/media/nativewindow/util/Dimension.java b/src/nativewindow/classes/javax/media/nativewindow/util/Dimension.java
index 0a5a94565..4fae98f08 100644
--- a/src/nativewindow/classes/javax/media/nativewindow/util/Dimension.java
+++ b/src/nativewindow/classes/javax/media/nativewindow/util/Dimension.java
@@ -57,7 +57,9 @@ public class Dimension implements Cloneable, DimensionImmutable {
         }
     }
 
+    @Override
     public int getWidth() { return width; }
+    @Override
     public int getHeight() { return height; }
 
     public void setWidth(int width) {
@@ -77,10 +79,12 @@ public class Dimension implements Cloneable, DimensionImmutable {
         return this;
     }
 
+    @Override
     public String toString() {
         return new String(width+" x "+height);
     }
 
+    @Override
     public boolean equals(Object obj) {
         if(this == obj)  { return true; }
         if (obj instanceof Dimension) {
@@ -91,6 +95,7 @@ public class Dimension implements Cloneable, DimensionImmutable {
         return false;
     }
 
+    @Override
     public int hashCode() {
         // 31 * x == (x << 5) - x
         int hash = 31 + width;
diff --git a/src/nativewindow/classes/javax/media/nativewindow/util/Insets.java b/src/nativewindow/classes/javax/media/nativewindow/util/Insets.java
index 199ec27cb..f22668f55 100644
--- a/src/nativewindow/classes/javax/media/nativewindow/util/Insets.java
+++ b/src/nativewindow/classes/javax/media/nativewindow/util/Insets.java
@@ -57,11 +57,17 @@ public class Insets implements Cloneable, InsetsImmutable {
         }
     }
 
+    @Override
     public final int getLeftWidth() { return l; }
+    @Override
     public final int getRightWidth() { return r; }
+    @Override
     public final int getTotalWidth() { return l + r; }
+    @Override
     public final int getTopHeight() { return t; }
+    @Override
     public final int getBottomHeight() { return b; }
+    @Override
     public final int getTotalHeight() { return t + b; }
 
     public void setLeftWidth(int left) { l = left; }
@@ -69,6 +75,7 @@ public class Insets implements Cloneable, InsetsImmutable {
     public void setTopHeight(int top) { t = top; }
     public void setBottomHeight(int bottom) { b = bottom; }
     
+    @Override
     public boolean equals(Object obj) {
         if(this == obj)  { return true; }
         if (obj instanceof Insets) {
@@ -79,6 +86,7 @@ public class Insets implements Cloneable, InsetsImmutable {
         return false;
     }
 
+    @Override
     public int hashCode() {
         int sum1 = l + b;
         int sum2 = t + r;
diff --git a/src/nativewindow/classes/javax/media/nativewindow/util/Point.java b/src/nativewindow/classes/javax/media/nativewindow/util/Point.java
index c53b16928..8e6caf72b 100644
--- a/src/nativewindow/classes/javax/media/nativewindow/util/Point.java
+++ b/src/nativewindow/classes/javax/media/nativewindow/util/Point.java
@@ -54,6 +54,7 @@ public class Point implements Cloneable, PointImmutable {
         }
     }
 
+    @Override
     public boolean equals(Object obj) {
         if(this == obj)  { return true; }
         if (obj instanceof Point) {
@@ -63,14 +64,17 @@ public class Point implements Cloneable, PointImmutable {
         return false;
     }
 
+    @Override
     public final int getX() {
         return x;
     }
 
+    @Override
     public final int getY() {
         return y;
     }
 
+    @Override
     public int hashCode() {
         // 31 * x == (x << 5) - x
         int hash = 31 + x;
diff --git a/src/nativewindow/classes/javax/media/nativewindow/util/Rectangle.java b/src/nativewindow/classes/javax/media/nativewindow/util/Rectangle.java
index 8d6bfe48f..8e6fc8e36 100644
--- a/src/nativewindow/classes/javax/media/nativewindow/util/Rectangle.java
+++ b/src/nativewindow/classes/javax/media/nativewindow/util/Rectangle.java
@@ -28,6 +28,8 @@
  
 package javax.media.nativewindow.util;
 
+import java.util.List;
+
 public class Rectangle implements Cloneable, RectangleImmutable {
     int x;
     int y;
@@ -57,15 +59,90 @@ public class Rectangle implements Cloneable, RectangleImmutable {
         }
     }
 
+    @Override
     public final int getX() { return x; }
+    @Override
     public final int getY() { return y; }
+    @Override
     public final int getWidth() { return width; }
+    @Override
     public final int getHeight() { return height; }
-    public void setX(int x) { this.x = x; }
-    public void setY(int y) { this.y = y; }
-    public void setWidth(int width) { this.width = width; }
-    public void setHeight(int height) { this.height = height; }
+    
+    public final void setX(int x) { this.x = x; }
+    public final void setY(int y) { this.y = y; }
+    public final void setWidth(int width) { this.width = width; }
+    public final void setHeight(int height) { this.height = height; }
 
+    @Override
+    public final RectangleImmutable union(final RectangleImmutable r) {
+        return union(r.getX(), r.getY(), r.getX() + r.getWidth(), r.getY() + r.getHeight());
+    }
+    @Override
+    public final RectangleImmutable union(final int rx1, final int ry1, final int rx2, final int ry2) {
+        final int x1 = Math.min(x, rx1);
+        final int y1 = Math.min(y, ry1);
+        final int x2 = Math.max(x + width, rx2);
+        final int y2 = Math.max(y + height, ry2);
+        return new Rectangle(x1, y1, x2 - x1, y2 - y1);                
+    }
+    /**
+     * Calculates the union of the given rectangles, stores it in this instance and returns this instance.
+     * @param rectangles given list of rectangles
+     * @return this instance holding the union of given rectangles.
+     */
+    public final Rectangle union(final List<RectangleImmutable> rectangles) {
+        int x1=Integer.MAX_VALUE, y1=Integer.MAX_VALUE;
+        int x2=Integer.MIN_VALUE, y2=Integer.MIN_VALUE;
+        for(int i=rectangles.size()-1; i>=0; i--) {
+            final RectangleImmutable vp = rectangles.get(i);
+            x1 = Math.min(x1, vp.getX());
+            x2 = Math.max(x2, vp.getX() + vp.getWidth());
+            y1 = Math.min(y1, vp.getY());
+            y2 = Math.max(y2, vp.getY() + vp.getHeight());
+        }
+        setX(x1);
+        setY(y1);
+        setWidth(x2 - x1);
+        setHeight(y2 - y1);
+        return this;
+    }
+        
+    @Override
+    public final RectangleImmutable intersection(RectangleImmutable r) {
+        return intersection(r.getX(), r.getY(), r.getX() + r.getWidth(), r.getY() + r.getHeight());
+    }
+    @Override
+    public final RectangleImmutable intersection(final int rx1, final int ry1, final int rx2, final int ry2) {
+        final int x1 = Math.max(x, rx1);
+        final int y1 = Math.max(y, ry1);
+        final int x2 = Math.min(x + width, rx2);
+        final int y2 = Math.min(y + height, ry2);
+        final int ix, iy, iwidth, iheight;
+        if( x2 < x1 ) {
+            ix = 0;
+            iwidth = 0;
+        } else {
+            ix = x1;
+            iwidth = x2 - x1;
+        }
+        if( y2 < y1 ) {
+            iy = 0;
+            iheight = 0;
+        } else {
+            iy = y1;
+            iheight = y2 - y1;
+        }
+        return new Rectangle (ix, iy, iwidth, iheight);
+    }
+    @Override
+    public final float coverage(RectangleImmutable r) {
+        final RectangleImmutable isect = intersection(r);
+        final float sqI = (float) ( isect.getWidth()*isect.getHeight() );
+        final float sqT = (float) ( width*height );
+        return sqI / sqT;
+    }
+    
+    @Override
     public boolean equals(Object obj) {
         if(this == obj)  { return true; }
         if (obj instanceof Rectangle) {
@@ -76,6 +153,7 @@ public class Rectangle implements Cloneable, RectangleImmutable {
         return false;
     }
 
+    @Override
     public int hashCode() {
         int sum1 = x + height;
         int sum2 = width + y;
diff --git a/src/nativewindow/classes/javax/media/nativewindow/util/RectangleImmutable.java b/src/nativewindow/classes/javax/media/nativewindow/util/RectangleImmutable.java
index d3b43c864..7531989de 100644
--- a/src/nativewindow/classes/javax/media/nativewindow/util/RectangleImmutable.java
+++ b/src/nativewindow/classes/javax/media/nativewindow/util/RectangleImmutable.java
@@ -41,6 +41,26 @@ public interface RectangleImmutable extends WriteCloneable {
 
     int getY();
 
+    /** Returns the union of this rectangle and the given rectangle. */
+    RectangleImmutable union(final RectangleImmutable r);
+    /** Returns the union of this rectangleand the given coordinates. */
+    RectangleImmutable union(final int rx1, final int ry1, final int rx2, final int ry2);
+    /** Returns the intersection of this rectangleand the given rectangle. */
+    RectangleImmutable intersection(RectangleImmutable r);
+    /** Returns the intersection of this rectangleand the given coordinates. */
+    RectangleImmutable intersection(final int rx1, final int ry1, final int rx2, final int ry2);
+    /** 
+     * Returns the coverage of given rectangle w/ this this one, i.e. between <code>0.0</code> and <code>1.0</code>.
+     * <p>
+     * Coverage is computed by:
+     * <pre>
+     *    isect = this.intersection(r);
+     *    coverage = area( isect ) / area( this ) ;
+     * </pre>
+     * </p> 
+     */
+    float coverage(RectangleImmutable r);
+    
     /**
      * Checks whether two rect objects are equal. Two instances
      * of <code>Rectangle</code> are equal if the four integer values
diff --git a/src/nativewindow/classes/javax/media/nativewindow/util/SurfaceSize.java b/src/nativewindow/classes/javax/media/nativewindow/util/SurfaceSize.java
index 8f21bc49b..d7e451af8 100644
--- a/src/nativewindow/classes/javax/media/nativewindow/util/SurfaceSize.java
+++ b/src/nativewindow/classes/javax/media/nativewindow/util/SurfaceSize.java
@@ -36,8 +36,8 @@ package javax.media.nativewindow.util;
  * </ul>
  */
 public class SurfaceSize {
-    DimensionImmutable resolution;
-    int bitsPerPixel;
+    final DimensionImmutable resolution;
+    final int bitsPerPixel;
 
     public SurfaceSize(DimensionImmutable resolution, int bitsPerPixel) {
         if(null==resolution || bitsPerPixel<=0) {