4 files changed, 229 insertions, 110 deletions

diff --git a/src/nativewindow/native/NativewindowCommon.c b/src/nativewindow/native/NativewindowCommon.c
new file mode 100644
index 000000000..e357045d6
--- /dev/null
+++ b/src/nativewindow/native/NativewindowCommon.c
@@ -0,0 +1,57 @@
+
+#include "NativewindowCommon.h"
+
+static const char * const ClazzNameRuntimeException = "java/lang/RuntimeException";
+static jclass    runtimeExceptionClz=NULL;
+
+void NativewindowCommon_FatalError(JNIEnv *env, const char* msg, ...)
+{
+    char buffer[512];
+    va_list ap;
+
+    va_start(ap, msg);
+    vsnprintf(buffer, sizeof(buffer), msg, ap);
+    va_end(ap);
+
+    fprintf(stderr, "%s\n", buffer);
+    (*env)->FatalError(env, buffer);
+}
+
+void NativewindowCommon_throwNewRuntimeException(JNIEnv *env, const char* msg, ...)
+{
+    char buffer[512];
+    va_list ap;
+
+    va_start(ap, msg);
+    vsnprintf(buffer, sizeof(buffer), msg, ap);
+    va_end(ap);
+
+    (*env)->ThrowNew(env, runtimeExceptionClz, buffer);
+}
+
+int NativewindowCommon_init(JNIEnv *env) {
+    if(NULL==runtimeExceptionClz) {
+        jclass c = (*env)->FindClass(env, ClazzNameRuntimeException);
+        if(NULL==c) {
+            NativewindowCommon_FatalError(env, "Nativewindow: can't find %s", ClazzNameRuntimeException);
+        }
+        runtimeExceptionClz = (jclass)(*env)->NewGlobalRef(env, c);
+        (*env)->DeleteLocalRef(env, c);
+        if(NULL==runtimeExceptionClz) {
+            NativewindowCommon_FatalError(env, "Nativewindow: can't use %s", ClazzNameRuntimeException);
+        }
+        return 1;
+    }
+    return 0;
+}
+
+jchar* NativewindowCommon_GetNullTerminatedStringChars(JNIEnv* env, jstring str)
+{
+    jchar* strChars = NULL;
+    strChars = calloc((*env)->GetStringLength(env, str) + 1, sizeof(jchar));
+    if (strChars != NULL) {
+        (*env)->GetStringRegion(env, str, 0, (*env)->GetStringLength(env, str), strChars);
+    }
+    return strChars;
+}
+
diff --git a/src/nativewindow/native/NativewindowCommon.h b/src/nativewindow/native/NativewindowCommon.h
new file mode 100644
index 000000000..5dc5debef
--- /dev/null
+++ b/src/nativewindow/native/NativewindowCommon.h
@@ -0,0 +1,15 @@
+
+#ifndef NATIVEWINDOW_COMMON_H
+#define NATIVEWINDOW_COMMON_H 1
+
+#include <jni.h>
+#include <stdlib.h>
+
+int NativewindowCommon_init(JNIEnv *env);
+
+jchar* NativewindowCommon_GetNullTerminatedStringChars(JNIEnv* env, jstring str);
+
+void NativewindowCommon_FatalError(JNIEnv *env, const char* msg, ...);
+void NativewindowCommon_throwNewRuntimeException(JNIEnv *env, const char* msg, ...);
+
+#endif
diff --git a/src/nativewindow/native/windows/GDImisc.c b/src/nativewindow/native/windows/GDImisc.c
index 0de40cf50..798edcbbf 100644
--- a/src/nativewindow/native/windows/GDImisc.c
+++ b/src/nativewindow/native/windows/GDImisc.c
@@ -29,6 +29,7 @@
 
 #include <stdio.h>
 
+#include "NativewindowCommon.h"
 #include "com_jogamp_nativewindow_impl_windows_GDI.h"
 
 // #define VERBOSE_ON 1
@@ -39,19 +40,6 @@
     #define DBG_PRINT(args...)
 #endif
 
-static void _FatalError(JNIEnv *env, const char* msg, ...)
-{
-    char buffer[512];
-    va_list ap;
-
-    va_start(ap, msg);
-    vsnprintf(buffer, sizeof(buffer), msg, ap);
-    va_end(ap);
-
-    fprintf(stderr, "%s\n", buffer);
-    (*env)->FatalError(env, buffer);
-}
-
 static const char * const ClazzNamePoint = "javax/media/nativewindow/util/Point";
 static const char * const ClazzAnyCstrName = "<init>";
 static const char * const ClazzNamePointCstrSignature = "(II)V";
@@ -59,52 +47,136 @@ static const char * const ClazzNamePointCstrSignature = "(II)V";
 static jclass pointClz = NULL;
 static jmethodID pointCstr = NULL;
 
-#define NATIVEWINDOW_DUMMY_WINDOW_NAME "__nativewindow_dummy_window"
-static ATOM nativewindowClass = 0;
-static HINSTANCE nativeHInstance = NULL;
-
-LRESULT CALLBACK DummyWndProc( HWND   hWnd, UINT   uMsg, WPARAM wParam, LPARAM lParam) {
-  return DefWindowProc(hWnd,uMsg,wParam,lParam);
+HINSTANCE GetApplicationHandle() {
+    return GetModuleHandle(NULL);
 }
 
-HWND CreateDummyWindow0(int x, int y, int width, int height ) {
-    DWORD     dwExStyle;
-    DWORD     dwStyle;
-    HWND      hWnd;
-    HINSTANCE hInstance = GetModuleHandle(NULL);
-    if( nativeHInstance != hInstance || 0 == nativewindowClass ) {
-        nativeHInstance=hInstance;
-        WNDCLASS  wc;
+/*   Java->C glue code:
+ *   Java package: com.jogamp.nativewindow.impl.windows.GDI
+ *    Java method: boolean CreateWindowClass(long hInstance, java.lang.String clazzName, long wndProc)
+ *     C function: BOOL CreateWindowClass(HANDLE hInstance, LPCSTR clazzName, HANDLE wndProc);
+ */
+JNIEXPORT jboolean JNICALL
+Java_com_jogamp_nativewindow_impl_windows_GDI_CreateWindowClass
+    (JNIEnv *env, jclass _unused, jlong jHInstance, jstring jClazzName, jlong wndProc) 
+{
+    HINSTANCE hInstance = (HINSTANCE) (intptr_t) jHInstance;
+    const TCHAR* clazzName = NULL;
+    WNDCLASS  wc;
+    jboolean res;
+
+#ifdef UNICODE
+    clazzName = NewtCommon_GetNullTerminatedStringChars(env, jClazzName);
+#else
+    clazzName = (*env)->GetStringUTFChars(env, jClazzName, NULL);
+#endif
+
+    ZeroMemory( &wc, sizeof( wc ) );
+    if( GetClassInfo( hInstance,  clazzName, &wc ) ) {
+        // registered already
+        res = JNI_TRUE;
+    } else {
+        // register now
         ZeroMemory( &wc, sizeof( wc ) );
-        wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
-        wc.lpfnWndProc = (WNDPROC) DummyWndProc;
+        wc.style = CS_HREDRAW | CS_VREDRAW ;
+        wc.lpfnWndProc = (WNDPROC) (intptr_t) wndProc;
         wc.cbClsExtra = 0;
         wc.cbWndExtra = 0;
         wc.hInstance = hInstance;
         wc.hIcon = NULL;
-        wc.hCursor = NULL;
-        wc.hbrBackground = NULL;
+        wc.hCursor = LoadCursor( NULL, IDC_ARROW);
+        wc.hbrBackground = NULL; // no background paint - GetStockObject(BLACK_BRUSH);
         wc.lpszMenuName = NULL;
-        wc.lpszClassName = NATIVEWINDOW_DUMMY_WINDOW_NAME;
-        if( !(nativewindowClass = RegisterClass( &wc )) ) {
-          fprintf(stderr, "FatalError com_jogamp_nativewindow_impl_windows_GDI: RegisterClass Failed: %d\n", GetLastError() );
-          return( 0 );
-        }
+        wc.lpszClassName = clazzName;
+        res = ( 0 != RegisterClass( &wc ) ) ? JNI_TRUE : JNI_FALSE ;
     }
 
+#ifdef UNICODE
+    free((void*) clazzName);
+#else
+    (*env)->ReleaseStringUTFChars(env, jClazzName, clazzName);
+#endif
+
+    return res;
+}
+
+/*   Java->C glue code:
+ *   Java package: com.jogamp.nativewindow.impl.windows.GDI
+ *    Java method: boolean DestroyWindowClass(long hInstance, java.lang.String className)
+ *     C function: BOOL DestroyWindowClass(HANDLE hInstance, LPCSTR className);
+ */
+JNIEXPORT jboolean JNICALL
+Java_com_jogamp_nativewindow_impl_windows_GDI_DestroyWindowClass
+    (JNIEnv *env, jclass _unused, jlong jHInstance, jstring jClazzName) 
+{
+    HINSTANCE hInstance = (HINSTANCE) (intptr_t) jHInstance;
+    const TCHAR* clazzName = NULL;
+    jboolean res;
+
+#ifdef UNICODE
+    clazzName = NewtCommon_GetNullTerminatedStringChars(env, jClazzName);
+#else
+    clazzName = (*env)->GetStringUTFChars(env, jClazzName, NULL);
+#endif
+
+    res = ( 0 != UnregisterClass( clazzName, hInstance ) ) ? JNI_TRUE : JNI_FALSE ;
+
+#ifdef UNICODE
+    free((void*) clazzName);
+#else
+    (*env)->ReleaseStringUTFChars(env, jClazzName, clazzName);
+#endif
+
+    return res;
+}
+
+
+/*   Java->C glue code:
+ *   Java package: com.jogamp.nativewindow.impl.windows.GDI
+ *    Java method: long CreateDummyWindow0(long hInstance, java.lang.String className, java.lang.String windowName, int x, int y, int width, int height)
+ *     C function: HANDLE CreateDummyWindow0(HANDLE hInstance, LPCSTR className, LPCSTR windowName, int x, int y, int width, int height);
+ */
+JNIEXPORT jlong JNICALL
+Java_com_jogamp_nativewindow_impl_windows_GDI_CreateDummyWindow0
+    (JNIEnv *env, jclass _unused, jlong jHInstance, jstring jWndClassName, jstring jWndName, jint x, jint y, jint width, jint height) 
+{
+    HINSTANCE hInstance = (HINSTANCE) (intptr_t) jHInstance;
+    const TCHAR* wndClassName = NULL;
+    const TCHAR* wndName = NULL;
+    DWORD     dwExStyle;
+    DWORD     dwStyle;
+    HWND      hWnd;
+
+#ifdef UNICODE
+    wndClassName = NewtCommon_GetNullTerminatedStringChars(env, jWndClassName);
+    wndName = NewtCommon_GetNullTerminatedStringChars(env, jWndName);
+#else
+    wndClassName = (*env)->GetStringUTFChars(env, jWndClassName, NULL);
+    wndName = (*env)->GetStringUTFChars(env, jWndName, NULL);
+#endif
+
     dwExStyle = WS_EX_APPWINDOW | WS_EX_WINDOWEDGE;
     dwStyle = WS_OVERLAPPEDWINDOW;
-    if( !(hWnd=CreateWindowEx( dwExStyle,
-                             NATIVEWINDOW_DUMMY_WINDOW_NAME,
-                             NATIVEWINDOW_DUMMY_WINDOW_NAME,
-                             dwStyle | WS_CLIPSIBLINGS | WS_CLIPCHILDREN,
-                             x, y, width, height,
-                             NULL, NULL, hInstance, NULL ) ) ) {
-        return( 0 );
-    }
-    return( hWnd );
+
+    hWnd = CreateWindowEx( dwExStyle,
+                           wndClassName,
+                           wndName,
+                           dwStyle | WS_CLIPSIBLINGS | WS_CLIPCHILDREN,
+                           x, y, width, height,
+                           NULL, NULL, hInstance, NULL );
+
+#ifdef UNICODE
+    free((void*) wndClassName);
+    free((void*) wndName);
+#else
+    (*env)->ReleaseStringUTFChars(env, jWndClassName, wndClassName);
+    (*env)->ReleaseStringUTFChars(env, jWndName, wndName);
+#endif
+
+    return (jlong) (intptr_t) hWnd;
 }
 
+
 /*
  * Class:     com_jogamp_nativewindow_impl_windows_GDI
  * Method:    initIDs0
@@ -113,25 +185,40 @@ HWND CreateDummyWindow0(int x, int y, int width, int height ) {
 JNIEXPORT jboolean JNICALL Java_com_jogamp_nativewindow_impl_windows_GDI_initIDs0
   (JNIEnv *env, jclass clazz)
 {
-    if(NULL==pointClz) {
+    if(NativewindowCommon_init(env)) {
         jclass c = (*env)->FindClass(env, ClazzNamePoint);
         if(NULL==c) {
-            _FatalError(env, "FatalError com_jogamp_nativewindow_impl_windows_GDI: can't find %s", ClazzNamePoint);
+            NativewindowCommon_FatalError(env, "FatalError com_jogamp_nativewindow_impl_windows_GDI: can't find %s", ClazzNamePoint);
         }
         pointClz = (jclass)(*env)->NewGlobalRef(env, c);
         (*env)->DeleteLocalRef(env, c);
         if(NULL==pointClz) {
-            _FatalError(env, "FatalError com_jogamp_nativewindow_impl_windows_GDI: can't use %s", ClazzNamePoint);
+            NativewindowCommon_FatalError(env, "FatalError com_jogamp_nativewindow_impl_windows_GDI: can't use %s", ClazzNamePoint);
         }
         pointCstr = (*env)->GetMethodID(env, pointClz, ClazzAnyCstrName, ClazzNamePointCstrSignature);
         if(NULL==pointCstr) {
-            _FatalError(env, "FatalError com_jogamp_nativewindow_impl_windows_GDI: can't fetch %s.%s %s",
+            NativewindowCommon_FatalError(env, "FatalError com_jogamp_nativewindow_impl_windows_GDI: can't fetch %s.%s %s",
                 ClazzNamePoint, ClazzAnyCstrName, ClazzNamePointCstrSignature);
         }
     }
     return JNI_TRUE;
 }
 
+LRESULT CALLBACK DummyWndProc( HWND   hWnd, UINT   uMsg, WPARAM wParam, LPARAM lParam) {
+  return DefWindowProc(hWnd,uMsg,wParam,lParam);
+}
+
+/*
+ * Class:     com_jogamp_nativewindow_impl_windows_GDI
+ * Method:    getDummyWndProc0
+ * Signature: ()J
+ */
+JNIEXPORT jlong JNICALL Java_com_jogamp_nativewindow_impl_windows_GDI_getDummyWndProc0
+  (JNIEnv *env, jclass clazz)
+{
+    return (jlong) (intptr_t) DummyWndProc;
+}
+
 /*
  * Class:     com_jogamp_nativewindow_impl_windows_GDI
  * Method:    GetRelativeLocation0
diff --git a/src/nativewindow/native/x11/Xmisc.c b/src/nativewindow/native/x11/Xmisc.c
index efb20c54e..0d92880b3 100644
--- a/src/nativewindow/native/x11/Xmisc.c
+++ b/src/nativewindow/native/x11/Xmisc.c
@@ -80,6 +80,7 @@ Bool XF86VidModeSetGammaRamp(
 #define RTLD_DEFAULT NULL
 #endif
 
+#include "NativewindowCommon.h"
 #include "com_jogamp_nativewindow_impl_x11_X11Lib.h"
 
 // #define VERBOSE_ON 1
@@ -93,107 +94,66 @@ Bool XF86VidModeSetGammaRamp(
 /* Need to pull this in as we don't have a stub header for it */
 extern Bool XineramaEnabled(Display* display);
 
-static void _FatalError(JNIEnv *env, const char* msg, ...)
-{
-    char buffer[512];
-    va_list ap;
-
-    va_start(ap, msg);
-    vsnprintf(buffer, sizeof(buffer), msg, ap);
-    va_end(ap);
-
-    fprintf(stderr, "%s\n", buffer);
-    (*env)->FatalError(env, buffer);
-}
-
 static const char * const ClazzNameBuffers = "com/jogamp/common/nio/Buffers";
 static const char * const ClazzNameBuffersStaticCstrName = "copyByteBuffer";
 static const char * const ClazzNameBuffersStaticCstrSignature = "(Ljava/nio/ByteBuffer;)Ljava/nio/ByteBuffer;";
 static const char * const ClazzNameByteBuffer = "java/nio/ByteBuffer";
-static const char * const ClazzNameRuntimeException = "java/lang/RuntimeException";
 static const char * const ClazzNamePoint = "javax/media/nativewindow/util/Point";
 static const char * const ClazzAnyCstrName = "<init>";
 static const char * const ClazzNamePointCstrSignature = "(II)V";
 static jclass clazzBuffers = NULL;
 static jmethodID cstrBuffers = NULL;
 static jclass clazzByteBuffer = NULL;
-static jclass clazzRuntimeException=NULL;
 static jclass pointClz = NULL;
 static jmethodID pointCstr = NULL;
 
 static void _initClazzAccess(JNIEnv *env) {
     jclass c;
 
-    if(NULL!=clazzRuntimeException) return ;
-
-    c = (*env)->FindClass(env, ClazzNameRuntimeException);
-    if(NULL==c) {
-        _FatalError(env, "FatalError Java_com_jogamp_nativewindow_impl_x11_X11Lib: can't find %s", ClazzNameRuntimeException);
-    }
-    clazzRuntimeException = (jclass)(*env)->NewGlobalRef(env, c);
-    (*env)->DeleteLocalRef(env, c);
-    if(NULL==clazzRuntimeException) {
-        _FatalError(env, "FatalError Java_com_jogamp_nativewindow_impl_x11_X11Lib: can't use %s", ClazzNameRuntimeException);
-    }
+    if(!NativewindowCommon_init(env)) return;
 
     c = (*env)->FindClass(env, ClazzNameBuffers);
     if(NULL==c) {
-        _FatalError(env, "FatalError Java_com_jogamp_nativewindow_impl_x11_X11Lib: can't find %s", ClazzNameBuffers);
+        NativewindowCommon_FatalError(env, "FatalError Java_com_jogamp_nativewindow_impl_x11_X11Lib: can't find %s", ClazzNameBuffers);
     }
     clazzBuffers = (jclass)(*env)->NewGlobalRef(env, c);
     (*env)->DeleteLocalRef(env, c);
     if(NULL==clazzBuffers) {
-        _FatalError(env, "FatalError Java_com_jogamp_nativewindow_impl_x11_X11Lib: can't use %s", ClazzNameBuffers);
+        NativewindowCommon_FatalError(env, "FatalError Java_com_jogamp_nativewindow_impl_x11_X11Lib: can't use %s", ClazzNameBuffers);
     }
     c = (*env)->FindClass(env, ClazzNameByteBuffer);
     if(NULL==c) {
-        _FatalError(env, "FatalError Java_com_jogamp_nativewindow_impl_x11_X11Lib: can't find %s", ClazzNameByteBuffer);
+        NativewindowCommon_FatalError(env, "FatalError Java_com_jogamp_nativewindow_impl_x11_X11Lib: can't find %s", ClazzNameByteBuffer);
     }
     clazzByteBuffer = (jclass)(*env)->NewGlobalRef(env, c);
     (*env)->DeleteLocalRef(env, c);
     if(NULL==c) {
-        _FatalError(env, "FatalError Java_com_jogamp_nativewindow_impl_x11_X11Lib: can't use %s", ClazzNameByteBuffer);
+        NativewindowCommon_FatalError(env, "FatalError Java_com_jogamp_nativewindow_impl_x11_X11Lib: can't use %s", ClazzNameByteBuffer);
     }
 
     cstrBuffers = (*env)->GetStaticMethodID(env, clazzBuffers, 
                             ClazzNameBuffersStaticCstrName, ClazzNameBuffersStaticCstrSignature);
     if(NULL==cstrBuffers) {
-        _FatalError(env, "FatalError Java_com_jogamp_nativewindow_impl_x11_X11Lib: can't create %s.%s %s",
+        NativewindowCommon_FatalError(env, "FatalError Java_com_jogamp_nativewindow_impl_x11_X11Lib: can't create %s.%s %s",
             ClazzNameBuffers, ClazzNameBuffersStaticCstrName, ClazzNameBuffersStaticCstrSignature);
     }
 
     c = (*env)->FindClass(env, ClazzNamePoint);
     if(NULL==c) {
-        _FatalError(env, "FatalError Java_com_jogamp_nativewindow_impl_x11_X11Lib: can't find %s", ClazzNamePoint);
+        NativewindowCommon_FatalError(env, "FatalError Java_com_jogamp_nativewindow_impl_x11_X11Lib: can't find %s", ClazzNamePoint);
     }
     pointClz = (jclass)(*env)->NewGlobalRef(env, c);
     (*env)->DeleteLocalRef(env, c);
     if(NULL==pointClz) {
-        _FatalError(env, "FatalError Java_com_jogamp_nativewindow_impl_x11_X11Lib: can't use %s", ClazzNamePoint);
+        NativewindowCommon_FatalError(env, "FatalError Java_com_jogamp_nativewindow_impl_x11_X11Lib: can't use %s", ClazzNamePoint);
     }
     pointCstr = (*env)->GetMethodID(env, pointClz, ClazzAnyCstrName, ClazzNamePointCstrSignature);
     if(NULL==pointCstr) {
-        _FatalError(env, "FatalError Java_com_jogamp_nativewindow_impl_x11_X11Lib: can't fetch %s.%s %s",
+        NativewindowCommon_FatalError(env, "FatalError Java_com_jogamp_nativewindow_impl_x11_X11Lib: can't fetch %s.%s %s",
             ClazzNamePoint, ClazzAnyCstrName, ClazzNamePointCstrSignature);
     }
 }
 
-static void _throwNewRuntimeException(Display * unlockDisplay, JNIEnv *env, const char* msg, ...)
-{
-    char buffer[512];
-    va_list ap;
-
-    if(NULL!=unlockDisplay) {
-        XUnlockDisplay(unlockDisplay);
-    }
-
-    va_start(ap, msg);
-    vsnprintf(buffer, sizeof(buffer), msg, ap);
-    va_end(ap);
-
-    (*env)->ThrowNew(env, clazzRuntimeException, buffer);
-}
-
 static JNIEnv * x11ErrorHandlerJNIEnv = NULL;
 static XErrorHandler origErrorHandler = NULL ;
 static int errorHandlerBlocked = 0 ;
@@ -208,7 +168,7 @@ static int x11ErrorHandler(Display *dpy, XErrorEvent *e)
     // Since the X11 Error may happen anytime, a exception could mess up the JVM completely.
     // Experienced this for remote displays issuing non supported commands, eg. glXCreateContextAttribsARB(..)
     //
-    _throwNewRuntimeException(NULL, x11ErrorHandlerJNIEnv, "Info: Nativewindow X11 Error: Display %p, Code 0x%X, errno %s", 
+    NativewindowCommon_throwNewRuntimeException(x11ErrorHandlerJNIEnv, "Info: Nativewindow X11 Error: Display %p, Code 0x%X, errno %s", 
         dpy, e->error_code, strerror(errno));
 #endif
 
@@ -256,7 +216,7 @@ static XIOErrorHandler origIOErrorHandler = NULL;
 static int x11IOErrorHandler(Display *dpy)
 {
     fprintf(stderr, "Nativewindow X11 IOError: Display %p (%s): %s\n", dpy, XDisplayName(NULL), strerror(errno));
-    // _FatalError(x11ErrorHandlerJNIEnv, "Nativewindow X11 IOError: Display %p (%s): %s", dpy, XDisplayName(NULL), strerror(errno));
+    // NativewindowCommon_FatalError(x11ErrorHandlerJNIEnv, "Nativewindow X11 IOError: Display %p (%s): %s", dpy, XDisplayName(NULL), strerror(errno));
     if(NULL!=origIOErrorHandler) {
         origIOErrorHandler(dpy);
     }
@@ -315,7 +275,7 @@ Java_com_jogamp_nativewindow_impl_x11_X11Lib_XGetVisualInfo1__JJLjava_nio_ByteBu
   jobject jbyteSource;
   jobject jbyteCopy;
     if(0==arg0) {
-        _FatalError(env, "invalid display connection..");
+        NativewindowCommon_FatalError(env, "invalid display connection..");
     }
     if (arg2 != NULL) {
         _ptr2 = (XVisualInfo *) (((char*) (*env)->GetDirectBufferAddress(env, arg2)) + 0);
@@ -344,7 +304,7 @@ JNIEXPORT jlong JNICALL
 Java_com_jogamp_nativewindow_impl_x11_X11Lib_DefaultVisualID(JNIEnv *env, jclass _unused, jlong display, jint screen) {
   jlong r;
     if(0==display) {
-        _FatalError(env, "invalid display connection..");
+        NativewindowCommon_FatalError(env, "invalid display connection..");
     }
   x11ErrorHandlerEnable((Display *) (intptr_t) display, 1, env);
   r = (jlong) XVisualIDFromVisual( DefaultVisual( (Display*) (intptr_t) display, screen ) );
@@ -360,7 +320,7 @@ Java_com_jogamp_nativewindow_impl_x11_X11Lib_DefaultVisualID(JNIEnv *env, jclass
 JNIEXPORT void JNICALL 
 Java_com_jogamp_nativewindow_impl_x11_X11Lib_XLockDisplay__J(JNIEnv *env, jclass _unused, jlong display) {
   if(0==display) {
-      _FatalError(env, "invalid display connection..");
+      NativewindowCommon_FatalError(env, "invalid display connection..");
   }
   XLockDisplay((Display *) (intptr_t) display);
 }
@@ -373,7 +333,7 @@ Java_com_jogamp_nativewindow_impl_x11_X11Lib_XLockDisplay__J(JNIEnv *env, jclass
 JNIEXPORT void JNICALL 
 Java_com_jogamp_nativewindow_impl_x11_X11Lib_XUnlockDisplay__J(JNIEnv *env, jclass _unused, jlong display) {
   if(0==display) {
-      _FatalError(env, "invalid display connection..");
+      NativewindowCommon_FatalError(env, "invalid display connection..");
   }
   XUnlockDisplay((Display *) (intptr_t) display);
 }
@@ -387,7 +347,7 @@ JNIEXPORT jint JNICALL
 Java_com_jogamp_nativewindow_impl_x11_X11Lib_XCloseDisplay__J(JNIEnv *env, jclass _unused, jlong display) {
   int _res;
   if(0==display) {
-      _FatalError(env, "invalid display connection..");
+      NativewindowCommon_FatalError(env, "invalid display connection..");
   }
   x11ErrorHandlerEnable((Display *) (intptr_t) display, 1, env);
   _res = XCloseDisplay((Display *) (intptr_t) display);
@@ -420,12 +380,12 @@ JNIEXPORT jlong JNICALL Java_com_jogamp_nativewindow_impl_x11_X11Lib_CreateDummy
     Screen* scrn;
 
     if(NULL==dpy) {
-        _FatalError(env, "invalid display connection..");
+        NativewindowCommon_FatalError(env, "invalid display connection..");
         return 0;
     }
 
     if(visualID<0) {
-        _throwNewRuntimeException(NULL, env, "invalid VisualID ..");
+        NativewindowCommon_throwNewRuntimeException(env, "invalid VisualID ..");
         return 0;
     }
 
@@ -450,7 +410,7 @@ JNIEXPORT jlong JNICALL Java_com_jogamp_nativewindow_impl_x11_X11Lib_CreateDummy
     if (visual==NULL)
     { 
         x11ErrorHandlerEnable(dpy, 0, env);
-        _throwNewRuntimeException(dpy, env, "could not query Visual by given VisualID, bail out!");
+        NativewindowCommon_throwNewRuntimeException(env, "could not query Visual by given VisualID, bail out!");
         return 0;
     } 
 
@@ -515,7 +475,7 @@ JNIEXPORT void JNICALL Java_com_jogamp_nativewindow_impl_x11_X11Lib_DestroyDummy
     Window      w = (Window) window;
 
     if(NULL==dpy) {
-        _throwNewRuntimeException(NULL, env, "invalid display connection..");
+        NativewindowCommon_throwNewRuntimeException(env, "invalid display connection..");
         return;
     }