NativeWindow AbstractGraphicsDevice: Add 'unitID' attribute and getUniqueID()

Preparation to support multiple devices on one machine,
hence adding the unitID a unique ID/index of the associated GPU, or GPU affinity.

Adding getUniqueID() to return a cached semantic unique string id for the device.
This was removed from the temp. impl in JOGL's GLContext, added unitID.

All other changes just adapt to the above.

16 files changed, 28 insertions, 44 deletions

diff --git a/src/jogl/classes/com/jogamp/opengl/impl/egl/EGLDrawable.java b/src/jogl/classes/com/jogamp/opengl/impl/egl/EGLDrawable.java
index f9fcdb29c..81dcc12d5 100644
--- a/src/jogl/classes/com/jogamp/opengl/impl/egl/EGLDrawable.java
+++ b/src/jogl/classes/com/jogamp/opengl/impl/egl/EGLDrawable.java
@@ -166,7 +166,7 @@ public abstract class EGLDrawable extends GLDrawableImpl {
                 if (!EGL.eglInitialize(eglDisplay, null, null)) {
                     throw new GLException("eglInitialize failed"+", error 0x"+Integer.toHexString(EGL.eglGetError()));
                 }
-                EGLGraphicsDevice e = new EGLGraphicsDevice(eglDisplay);
+                EGLGraphicsDevice e = new EGLGraphicsDevice(eglDisplay, AbstractGraphicsDevice.DEFAULT_UNIT);
                 DefaultGraphicsScreen s = new DefaultGraphicsScreen(e, aConfig.getScreen().getIndex());
                 GLCapabilities caps = (GLCapabilities) aConfig.getChosenCapabilities(); // yes, use the already choosen Capabilities (x11,win32,..)
                 eglConfig = (EGLGraphicsConfiguration) GraphicsConfigurationFactory.getFactory(e).chooseGraphicsConfiguration(caps, null, s);
diff --git a/src/jogl/classes/com/jogamp/opengl/impl/egl/EGLDrawableFactory.java b/src/jogl/classes/com/jogamp/opengl/impl/egl/EGLDrawableFactory.java
index c7e0a0417..3c8c4c98f 100644
--- a/src/jogl/classes/com/jogamp/opengl/impl/egl/EGLDrawableFactory.java
+++ b/src/jogl/classes/com/jogamp/opengl/impl/egl/EGLDrawableFactory.java
@@ -95,11 +95,7 @@ public class EGLDrawableFactory extends GLDrawableFactoryImpl {
 
     public EGLDrawableFactory() {
         super();
-        /** FIXME:
-        * find out the Windows semantics of a device connection {@link javax.media.nativewindow.AbstractGraphicsDevice#getConnection()}
-        * to actually use multiple devices.
-        */
-        defaultDevice = new EGLGraphicsDevice(AbstractGraphicsDevice.DEFAULT_CONNECTION);
+        defaultDevice = new EGLGraphicsDevice(AbstractGraphicsDevice.DEFAULT_UNIT);
     }
 
     static class SharedResource {
@@ -174,7 +170,7 @@ public class EGLDrawableFactory extends GLDrawableFactoryImpl {
     }
 
     protected GLContext createExternalGLContextImpl() {
-        AbstractGraphicsScreen absScreen = DefaultGraphicsScreen.createScreenDevice(AbstractGraphicsDevice.EXTERNAL_CONNECTION, 0);
+        AbstractGraphicsScreen absScreen = DefaultGraphicsScreen.createDefault(NativeWindowFactory.TYPE_EGL);
         return new EGLExternalContext(absScreen);
     }
 
diff --git a/src/jogl/classes/com/jogamp/opengl/impl/egl/EGLGraphicsConfigurationFactory.java b/src/jogl/classes/com/jogamp/opengl/impl/egl/EGLGraphicsConfigurationFactory.java
index 88e8a9ed1..c678707fc 100644
--- a/src/jogl/classes/com/jogamp/opengl/impl/egl/EGLGraphicsConfigurationFactory.java
+++ b/src/jogl/classes/com/jogamp/opengl/impl/egl/EGLGraphicsConfigurationFactory.java
@@ -282,7 +282,7 @@ public class EGLGraphicsConfigurationFactory extends GraphicsConfigurationFactor
         if (!EGL.eglInitialize(eglDisplay, null, null)) {
             throw new GLException("eglInitialize failed"+", error 0x"+Integer.toHexString(EGL.eglGetError()));
         }
-        EGLGraphicsDevice e = new EGLGraphicsDevice(eglDisplay);
+        EGLGraphicsDevice e = new EGLGraphicsDevice(eglDisplay, AbstractGraphicsDevice.DEFAULT_UNIT);
         DefaultGraphicsScreen s = new DefaultGraphicsScreen(e, 0);
         EGLGraphicsConfiguration eglConfig = chooseGraphicsConfigurationStatic(caps, chooser, s);
         if (null == eglConfig) {
diff --git a/src/jogl/classes/com/jogamp/opengl/impl/macosx/cgl/MacOSXCGLDrawableFactory.java b/src/jogl/classes/com/jogamp/opengl/impl/macosx/cgl/MacOSXCGLDrawableFactory.java
index 7981e7ba2..a8a82b46a 100644
--- a/src/jogl/classes/com/jogamp/opengl/impl/macosx/cgl/MacOSXCGLDrawableFactory.java
+++ b/src/jogl/classes/com/jogamp/opengl/impl/macosx/cgl/MacOSXCGLDrawableFactory.java
@@ -86,11 +86,7 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
         } catch (JogampRuntimeException jre) { /* n/a .. */ }
     }
 
-    /** FIXME:
-    * find out the Windows semantics of a device connection {@link javax.media.nativewindow.AbstractGraphicsDevice#getConnection()}
-    * to actually use multiple devices.
-    */
-    defaultDevice = new MacOSXGraphicsDevice(AbstractGraphicsDevice.DEFAULT_CONNECTION);
+    defaultDevice = new MacOSXGraphicsDevice(AbstractGraphicsDevice.DEFAULT_UNIT);
   }
 
   static class SharedResource {
@@ -156,7 +152,7 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
   }
 
   protected NativeSurface createOffscreenSurfaceImpl(GLCapabilities capabilities, GLCapabilitiesChooser chooser, int width, int height) {
-    AbstractGraphicsScreen screen = DefaultGraphicsScreen.createDefault();
+    AbstractGraphicsScreen screen = DefaultGraphicsScreen.createDefault(NativeWindowFactory.TYPE_MACOSX);
     ProxySurface ns = new ProxySurface(MacOSXCGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capabilities, chooser, screen, true));
     ns.setSize(width, height);
     return ns;
diff --git a/src/jogl/classes/com/jogamp/opengl/impl/macosx/cgl/MacOSXExternalCGLContext.java b/src/jogl/classes/com/jogamp/opengl/impl/macosx/cgl/MacOSXExternalCGLContext.java
index 973c67127..5dcc103b2 100644
--- a/src/jogl/classes/com/jogamp/opengl/impl/macosx/cgl/MacOSXExternalCGLContext.java
+++ b/src/jogl/classes/com/jogamp/opengl/impl/macosx/cgl/MacOSXExternalCGLContext.java
@@ -97,7 +97,7 @@ public class MacOSXExternalCGLContext extends MacOSXCGLContext {
         System.err.println("MacOSXExternalCGLContext Create "+caps);
     }
 
-    AbstractGraphicsScreen aScreen = DefaultGraphicsScreen.createDefault();
+    AbstractGraphicsScreen aScreen = DefaultGraphicsScreen.createDefault(NativeWindowFactory.TYPE_MACOSX);
     MacOSXCGLGraphicsConfiguration cfg = new MacOSXCGLGraphicsConfiguration(aScreen, caps, caps, pixelFormat);
 
     ProxySurface ns = new ProxySurface(cfg);
diff --git a/src/jogl/classes/com/jogamp/opengl/impl/macosx/cgl/awt/MacOSXAWTCGLGraphicsConfigurationFactory.java b/src/jogl/classes/com/jogamp/opengl/impl/macosx/cgl/awt/MacOSXAWTCGLGraphicsConfigurationFactory.java
index 6a9617d27..af8841d3d 100644
--- a/src/jogl/classes/com/jogamp/opengl/impl/macosx/cgl/awt/MacOSXAWTCGLGraphicsConfigurationFactory.java
+++ b/src/jogl/classes/com/jogamp/opengl/impl/macosx/cgl/awt/MacOSXAWTCGLGraphicsConfigurationFactory.java
@@ -62,7 +62,7 @@ public class MacOSXAWTCGLGraphicsConfigurationFactory extends GraphicsConfigurat
         }
 
         if(null==absScreen) {
-            absScreen = AWTGraphicsScreen.createScreenDevice(-1);
+            absScreen = AWTGraphicsScreen.createScreenDevice(-1, AbstractGraphicsDevice.DEFAULT_UNIT);
         }
         AWTGraphicsScreen awtScreen = (AWTGraphicsScreen) absScreen;
         device = ((AWTGraphicsDevice)awtScreen.getDevice()).getGraphicsDevice();
@@ -83,7 +83,7 @@ public class MacOSXAWTCGLGraphicsConfigurationFactory extends GraphicsConfigurat
 
         long displayHandle = 0;
 
-        MacOSXGraphicsDevice macDevice = new MacOSXGraphicsDevice();
+        MacOSXGraphicsDevice macDevice = new MacOSXGraphicsDevice(AbstractGraphicsDevice.DEFAULT_UNIT);
         DefaultGraphicsScreen macScreen = new DefaultGraphicsScreen(macDevice, awtScreen.getIndex());
         if(DEBUG) {
             System.err.println("MacOSXAWTCGLGraphicsConfigurationFactory: made "+macScreen);
diff --git a/src/jogl/classes/com/jogamp/opengl/impl/windows/wgl/WindowsExternalWGLContext.java b/src/jogl/classes/com/jogamp/opengl/impl/windows/wgl/WindowsExternalWGLContext.java
index 9917ea901..5ac937be8 100644
--- a/src/jogl/classes/com/jogamp/opengl/impl/windows/wgl/WindowsExternalWGLContext.java
+++ b/src/jogl/classes/com/jogamp/opengl/impl/windows/wgl/WindowsExternalWGLContext.java
@@ -75,7 +75,7 @@ public class WindowsExternalWGLContext extends WindowsWGLContext {
       throw new GLException("Error: attempted to make an external GLContext without a valid pixelformat");
     }
 
-    AbstractGraphicsScreen aScreen = DefaultGraphicsScreen.createDefault();
+    AbstractGraphicsScreen aScreen = DefaultGraphicsScreen.createDefault(NativeWindowFactory.TYPE_WINDOWS);
     WindowsWGLGraphicsConfiguration cfg = WindowsWGLGraphicsConfiguration.create(hdc, pfdID, glp, aScreen, true, true);
 
     ProxySurface ns = new ProxySurface(cfg);
diff --git a/src/jogl/classes/com/jogamp/opengl/impl/windows/wgl/WindowsExternalWGLDrawable.java b/src/jogl/classes/com/jogamp/opengl/impl/windows/wgl/WindowsExternalWGLDrawable.java
index 19fe8f03c..ec0bd7c7a 100644
--- a/src/jogl/classes/com/jogamp/opengl/impl/windows/wgl/WindowsExternalWGLDrawable.java
+++ b/src/jogl/classes/com/jogamp/opengl/impl/windows/wgl/WindowsExternalWGLDrawable.java
@@ -61,7 +61,7 @@ public class WindowsExternalWGLDrawable extends WindowsWGLDrawable {
       throw new GLException("Error: attempted to make an external GLContext without a valid pixelformat");
     }
 
-    AbstractGraphicsScreen aScreen = DefaultGraphicsScreen.createDefault();
+    AbstractGraphicsScreen aScreen = DefaultGraphicsScreen.createDefault(NativeWindowFactory.TYPE_WINDOWS);
     WindowsWGLGraphicsConfiguration cfg = WindowsWGLGraphicsConfiguration.create(hdc, pfdID, glp, aScreen, true, true);
 
     ProxySurface ns = new ProxySurface(cfg);
diff --git a/src/jogl/classes/com/jogamp/opengl/impl/windows/wgl/WindowsWGLDrawableFactory.java b/src/jogl/classes/com/jogamp/opengl/impl/windows/wgl/WindowsWGLDrawableFactory.java
index 850cf5542..64dd0eb46 100644
--- a/src/jogl/classes/com/jogamp/opengl/impl/windows/wgl/WindowsWGLDrawableFactory.java
+++ b/src/jogl/classes/com/jogamp/opengl/impl/windows/wgl/WindowsWGLDrawableFactory.java
@@ -87,11 +87,7 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
         } catch (JogampRuntimeException jre) { /* n/a .. */ }
     }
 
-    /** FIXME:
-    * find out the Windows semantics of a device connection {@link javax.media.nativewindow.AbstractGraphicsDevice#getConnection()}
-    * to actually use multiple devices.
-    */
-    defaultDevice = new WindowsGraphicsDevice(AbstractGraphicsDevice.DEFAULT_CONNECTION);
+    defaultDevice = new WindowsGraphicsDevice(AbstractGraphicsDevice.DEFAULT_UNIT);
   }
 
   static class SharedResource {
@@ -261,7 +257,7 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
   }
 
   protected final NativeSurface createOffscreenSurfaceImpl(GLCapabilities capabilities, GLCapabilitiesChooser chooser, int width, int height) {
-    AbstractGraphicsScreen screen = DefaultGraphicsScreen.createDefault();
+    AbstractGraphicsScreen screen = DefaultGraphicsScreen.createDefault(NativeWindowFactory.TYPE_WINDOWS);
     ProxySurface ns = new ProxySurface(WindowsWGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(
                                      capabilities, chooser, screen) );
     ns.setSize(width, height);
diff --git a/src/jogl/classes/com/jogamp/opengl/impl/windows/wgl/WindowsWGLGraphicsConfigurationFactory.java b/src/jogl/classes/com/jogamp/opengl/impl/windows/wgl/WindowsWGLGraphicsConfigurationFactory.java
index d34467fb1..372630446 100644
--- a/src/jogl/classes/com/jogamp/opengl/impl/windows/wgl/WindowsWGLGraphicsConfigurationFactory.java
+++ b/src/jogl/classes/com/jogamp/opengl/impl/windows/wgl/WindowsWGLGraphicsConfigurationFactory.java
@@ -65,7 +65,7 @@ public class WindowsWGLGraphicsConfigurationFactory extends GraphicsConfiguratio
         caps.setPBuffer   (usePBuffer);
 
         if(null==absScreen) {
-            absScreen = DefaultGraphicsScreen.createScreenDevice(AbstractGraphicsDevice.DEFAULT_CONNECTION, 0);
+            absScreen = DefaultGraphicsScreen.createDefault(NativeWindowFactory.TYPE_WINDOWS);
         }
         return new WindowsWGLGraphicsConfiguration(absScreen, caps, caps, WindowsWGLGraphicsConfiguration.GLCapabilities2PFD(caps), -1, null);
 
@@ -75,7 +75,7 @@ public class WindowsWGLGraphicsConfigurationFactory extends GraphicsConfiguratio
                                                                                        CapabilitiesChooser chooser,
                                                                                        AbstractGraphicsScreen absScreen) {
         if(null==absScreen) {
-            absScreen = DefaultGraphicsScreen.createScreenDevice(AbstractGraphicsDevice.DEFAULT_CONNECTION, 0);
+            absScreen = DefaultGraphicsScreen.createDefault(NativeWindowFactory.TYPE_WINDOWS);
         }
         GLCapabilities caps2 = (GLCapabilities) caps.clone();
         if(!caps2.isOnscreen()) {
diff --git a/src/jogl/classes/com/jogamp/opengl/impl/windows/wgl/awt/WindowsAWTWGLGraphicsConfigurationFactory.java b/src/jogl/classes/com/jogamp/opengl/impl/windows/wgl/awt/WindowsAWTWGLGraphicsConfigurationFactory.java
index 26704acf3..48850440d 100644
--- a/src/jogl/classes/com/jogamp/opengl/impl/windows/wgl/awt/WindowsAWTWGLGraphicsConfigurationFactory.java
+++ b/src/jogl/classes/com/jogamp/opengl/impl/windows/wgl/awt/WindowsAWTWGLGraphicsConfigurationFactory.java
@@ -62,7 +62,7 @@ public class WindowsAWTWGLGraphicsConfigurationFactory extends GraphicsConfigura
         }
 
         if(null==absScreen) {
-            absScreen = AWTGraphicsScreen.createScreenDevice(-1);
+            absScreen = AWTGraphicsScreen.createScreenDevice(-1, AbstractGraphicsDevice.DEFAULT_UNIT);
         }
         AWTGraphicsScreen awtScreen = (AWTGraphicsScreen) absScreen;
         device = ((AWTGraphicsDevice)awtScreen.getDevice()).getGraphicsDevice();
@@ -88,7 +88,7 @@ public class WindowsAWTWGLGraphicsConfigurationFactory extends GraphicsConfigura
 
         long displayHandle = 0;
 
-        WindowsGraphicsDevice winDevice = new WindowsGraphicsDevice();
+        WindowsGraphicsDevice winDevice = new WindowsGraphicsDevice(AbstractGraphicsDevice.DEFAULT_UNIT);
         DefaultGraphicsScreen winScreen = new DefaultGraphicsScreen(winDevice, awtScreen.getIndex());
         if(DEBUG) {
             System.err.println("WindowsAWTWGLGraphicsConfigurationFactory: made "+winScreen);
diff --git a/src/jogl/classes/com/jogamp/opengl/impl/x11/glx/X11GLXDrawableFactory.java b/src/jogl/classes/com/jogamp/opengl/impl/x11/glx/X11GLXDrawableFactory.java
index ddfae1f4c..d98d8a436 100644
--- a/src/jogl/classes/com/jogamp/opengl/impl/x11/glx/X11GLXDrawableFactory.java
+++ b/src/jogl/classes/com/jogamp/opengl/impl/x11/glx/X11GLXDrawableFactory.java
@@ -87,7 +87,7 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
         } catch (JogampRuntimeException jre) { /* n/a .. */ }
     }
 
-    defaultDevice = new X11GraphicsDevice(X11Util.getNullDisplayName());
+    defaultDevice = new X11GraphicsDevice(X11Util.getNullDisplayName(), AbstractGraphicsDevice.DEFAULT_UNIT);
 
     // Init shared resources via own thread
     // Will be released via ShutdownHook
@@ -204,7 +204,7 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
       }
           
       private final SharedResource createSharedResource(String connection) {
-          X11GraphicsDevice sharedDevice = new X11GraphicsDevice(X11Util.createDisplay(connection));
+          X11GraphicsDevice sharedDevice = new X11GraphicsDevice(X11Util.createDisplay(connection), AbstractGraphicsDevice.DEFAULT_UNIT);
           sharedDevice.setCloseDisplay(true);
           X11Util.lockDefaultToolkit(sharedDevice.getHandle()); // OK
           try {
diff --git a/src/jogl/classes/com/jogamp/opengl/impl/x11/glx/awt/X11AWTGLXGraphicsConfigurationFactory.java b/src/jogl/classes/com/jogamp/opengl/impl/x11/glx/awt/X11AWTGLXGraphicsConfigurationFactory.java
index 4b5b72cc6..d4af56aca 100644
--- a/src/jogl/classes/com/jogamp/opengl/impl/x11/glx/awt/X11AWTGLXGraphicsConfigurationFactory.java
+++ b/src/jogl/classes/com/jogamp/opengl/impl/x11/glx/awt/X11AWTGLXGraphicsConfigurationFactory.java
@@ -59,7 +59,7 @@ public class X11AWTGLXGraphicsConfigurationFactory extends GraphicsConfiguration
         }
 
         if(null==absScreen) {
-            absScreen = AWTGraphicsScreen.createScreenDevice(-1);
+            absScreen = AWTGraphicsScreen.createScreenDevice(-1, AbstractGraphicsDevice.DEFAULT_UNIT);
         }
         AWTGraphicsScreen awtScreen = (AWTGraphicsScreen) absScreen;
         device = ((AWTGraphicsDevice)awtScreen.getDevice()).getGraphicsDevice();
@@ -95,7 +95,7 @@ public class X11AWTGLXGraphicsConfigurationFactory extends GraphicsConfiguration
             displayHandle = X11Util.createDisplay(name);
         }
         ((AWTGraphicsDevice)awtScreen.getDevice()).setSubType(NativeWindowFactory.TYPE_X11, displayHandle);
-        X11GraphicsDevice x11Device = new X11GraphicsDevice(displayHandle);
+        X11GraphicsDevice x11Device = new X11GraphicsDevice(displayHandle, AbstractGraphicsDevice.DEFAULT_UNIT);
         x11Device.setCloseDisplay(true);
         X11GraphicsScreen x11Screen = new X11GraphicsScreen(x11Device, awtScreen.getIndex());
         if(DEBUG) {
diff --git a/src/jogl/classes/javax/media/opengl/GLContext.java b/src/jogl/classes/javax/media/opengl/GLContext.java
index 34ac8e93b..45e1361fb 100644
--- a/src/jogl/classes/javax/media/opengl/GLContext.java
+++ b/src/jogl/classes/javax/media/opengl/GLContext.java
@@ -557,26 +557,22 @@ public abstract class GLContext {
   private static /*final*/ HashSet/*<UniqueDeviceString>*/ deviceVersionsAvailableSet = new HashSet();
 
   protected static String getContextFQN(AbstractGraphicsDevice device, int major, int minor, int ctp) {
-      return getUniqueDeviceString(device) + "-" + toHexString(compose8bit(major, minor, ctp, 0));
+      return device.getUniqueID() + "-" + toHexString(compose8bit(major, minor, ctp, 0));
   }
 
   protected static String getDeviceVersionAvailableKey(AbstractGraphicsDevice device, int major, int profile) {
-      return getUniqueDeviceString(device) + "-" + toHexString(compose8bit(major, profile, 0, 0));
-  }
-
-  protected static String getUniqueDeviceString(AbstractGraphicsDevice device) {
-      return device.getType() + "_" + device.getConnection() ;
+      return device.getUniqueID() + "-" + toHexString(compose8bit(major, profile, 0, 0));
   }
 
   protected static boolean getAvailableGLVersionsSet(AbstractGraphicsDevice device) {
       synchronized ( deviceVersionsAvailableSet ) {
-        return deviceVersionsAvailableSet.contains(getUniqueDeviceString(device));
+        return deviceVersionsAvailableSet.contains(device.getUniqueID());
       }
   }
 
   protected static void setAvailableGLVersionsSet(AbstractGraphicsDevice device) {
       synchronized ( deviceVersionsAvailableSet ) {
-          String devKey = getUniqueDeviceString(device);
+          String devKey = device.getUniqueID();
           if ( deviceVersionsAvailableSet.contains(devKey) ) {
               throw new InternalError("Already set: "+devKey);
           }
diff --git a/src/jogl/classes/javax/media/opengl/GLProfile.java b/src/jogl/classes/javax/media/opengl/GLProfile.java
index 4111eb5a2..878c4024e 100644
--- a/src/jogl/classes/javax/media/opengl/GLProfile.java
+++ b/src/jogl/classes/javax/media/opengl/GLProfile.java
@@ -1476,7 +1476,7 @@ public class GLProfile {
         if(null==device) {
             device = defaultDevice;
         }
-        String deviceKey = GLContext.getUniqueDeviceString(device);
+        String deviceKey = device.getUniqueID();
         HashMap map = (HashMap) deviceConn2ProfileMap.get(deviceKey);
         if(null==map) {
             map = new HashMap();
@@ -1491,7 +1491,7 @@ public class GLProfile {
     private static void setProfileMap(AbstractGraphicsDevice device, HashMap/*<GL-String, GLProfile>*/mappedProfiles) {
         validateInitialization();
         synchronized ( deviceConn2ProfileMap ) {
-            deviceConn2ProfileMap.put(GLContext.getUniqueDeviceString(device), mappedProfiles);
+            deviceConn2ProfileMap.put(device.getUniqueID(), mappedProfiles);
         }
     }
 
diff --git a/src/jogl/classes/javax/media/opengl/awt/GLCanvas.java b/src/jogl/classes/javax/media/opengl/awt/GLCanvas.java
index c0f2736fb..292bfba7c 100644
--- a/src/jogl/classes/javax/media/opengl/awt/GLCanvas.java
+++ b/src/jogl/classes/javax/media/opengl/awt/GLCanvas.java
@@ -779,7 +779,7 @@ public class GLCanvas extends Canvas implements AWTGLAutoDrawable {
       return null;
     }
 
-    AbstractGraphicsScreen aScreen = AWTGraphicsScreen.createScreenDevice(device);
+    AbstractGraphicsScreen aScreen = AWTGraphicsScreen.createScreenDevice(device, AbstractGraphicsDevice.DEFAULT_UNIT);
     AWTGraphicsConfiguration config = (AWTGraphicsConfiguration)
       GraphicsConfigurationFactory.getFactory(AWTGraphicsDevice.class).chooseGraphicsConfiguration(capabilities,
                                                                                                    chooser,