Misc X11: Add GLX_MESA_swap_control; GLXExtensions (private); X11GLXContext commented out GLX_MESA_swap_control; native test of Mesa context-retarget bug, cannot reproduce yet.

10 files changed, 642 insertions, 25 deletions

diff --git a/make/stub_includes/opengl/GL/glxext.h b/make/stub_includes/opengl/GL/glxext.h
index 06dbb271b..3d85521b9 100644
--- a/make/stub_includes/opengl/GL/glxext.h
+++ b/make/stub_includes/opengl/GL/glxext.h
@@ -439,6 +439,16 @@ typedef GLXContext ( * PFNGLXCREATECONTEXTATTRIBSARBPROC) (Display *dpy, GLXFBCo
 #define GLX_EXT_visual_info 1
 #endif
 
+#ifndef GLX_MESA_swap_control
+#define GLX_MESA_swap_control 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern int glXSwapIntervalMESA(unsigned int interval);
+extern int glXGetSwapIntervalMESA(void);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef int ( * PFNGLXSWAPINTERVALMESAPROC)(unsigned int interval);
+typedef int ( * PFNGLXGETSWAPINTERVALMESAPROC)(void);
+#endif
+
 #ifndef GLX_SGI_swap_control
 #define GLX_SGI_swap_control 1
 #ifdef GLX_GLXEXT_PROTOTYPES
diff --git a/src/jogl/classes/jogamp/opengl/GLXExtensions.java b/src/jogl/classes/jogamp/opengl/GLXExtensions.java
new file mode 100644
index 000000000..36c6c4665
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/GLXExtensions.java
@@ -0,0 +1,37 @@
+/**
+ * Copyright 2012 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+package jogamp.opengl;
+
+/**
+ * Class holding GLX/WGL/.. extension strings, commonly used by JOGL's implementation. 
+ */
+public class GLXExtensions {   
+  public static final String GLX_MESA_swap_control           = "GLX_MESA_swap_control";
+  public static final String GLX_SGI_swap_control            = "GLX_SGI_swap_control";
+  public static final String GLX_NV_swap_group               = "GLX_NV_swap_group";
+}
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXContext.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXContext.java
index e1330eb52..72ddd2693 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXContext.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXContext.java
@@ -53,10 +53,10 @@ import javax.media.opengl.GLContext;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
 
-import jogamp.nativewindow.x11.X11Lib;
 import jogamp.nativewindow.x11.X11Util;
 import jogamp.opengl.GLContextImpl;
 import jogamp.opengl.GLDrawableImpl;
+import jogamp.opengl.GLXExtensions;
 
 import com.jogamp.common.nio.Buffers;
 import com.jogamp.common.util.VersionNumber;
@@ -72,7 +72,8 @@ public abstract class X11GLXContext extends GLContextImpl {
   // Table that holds the addresses of the native C-language entry points for
   // GLX extension functions.
   private GLXExtProcAddressTable glXExtProcAddressTable;
-  private int hasSwapIntervalSGI = 0;
+  /** 1 MESA, 2 SGI, 0 undefined, -1 none */
+  private int hasSwapInterval = 0;
   private int hasSwapGroupNV = 0;
 
   // This indicates whether the context we have created is indirect
@@ -101,7 +102,7 @@ public abstract class X11GLXContext extends GLContextImpl {
   protected void resetStates() {
     // no inner state _glXExt=null;
     glXExtProcAddressTable = null;
-    hasSwapIntervalSGI = 0;
+    hasSwapInterval = 0;
     hasSwapGroupNV = 0;
     isDirect = false;
     glXServerVersion = null;
@@ -155,8 +156,10 @@ public abstract class X11GLXContext extends GLContextImpl {
 
     try {
         if ( isGLXVersionGreaterEqualOneThree() ) {
+            // System.err.println(getThreadName() +": X11GLXContext.makeCurrent: obj " + toHexString(hashCode()) + " / ctx "+toHexString(contextHandle)+": ctx "+toHexString(ctx)+", [write "+toHexString(writeDrawable)+", read "+toHexString(readDrawable)+"] - switch");
             res = GLX.glXMakeContextCurrent(dpy, writeDrawable, readDrawable, ctx);
         } else if ( writeDrawable == readDrawable ) {
+            // System.err.println(getThreadName() +": X11GLXContext.makeCurrent: obj " + toHexString(hashCode()) + " / ctx "+toHexString(contextHandle)+": ctx "+toHexString(ctx)+", [write "+toHexString(writeDrawable)+"] - switch");
             res = GLX.glXMakeCurrent(dpy, writeDrawable, ctx);
         } else {
             // should not happen due to 'isGLReadDrawableAvailable()' query in GLContextImpl
@@ -513,20 +516,36 @@ public abstract class X11GLXContext extends GLContextImpl {
 
   @Override
   protected boolean setSwapIntervalImpl(int interval) {
-    X11GLXGraphicsConfiguration config = (X11GLXGraphicsConfiguration)drawable.getNativeSurface().getGraphicsConfiguration();
-    GLCapabilitiesImmutable glCaps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
-    if(!glCaps.isOnscreen()) { return false; }
+    if( !drawable.getChosenGLCapabilities().isOnscreen() ) { return false; } 
 
-    GLXExt glXExt = getGLXExt();
-    if(0==hasSwapIntervalSGI) {
+    final GLXExt glXExt = getGLXExt();
+    if(0==hasSwapInterval) {
         try {
-            hasSwapIntervalSGI = glXExt.isExtensionAvailable("GLX_SGI_swap_control")?1:-1;
-        } catch (Throwable t) { hasSwapIntervalSGI=1; }
-    }
-    if (hasSwapIntervalSGI>0) {
+            /** Same impl. ..
+            if( glXExt.isExtensionAvailable(GLXExtensions.GLX_MESA_swap_control) ) {
+                if(DEBUG) { System.err.println("X11GLXContext.setSwapInterval using: "+GLXExtensions.GLX_MESA_swap_control); }
+                hasSwapInterval =  1;
+            } else */ 
+            if ( glXExt.isExtensionAvailable(GLXExtensions.GLX_SGI_swap_control) ) {
+                if(DEBUG) { System.err.println("X11GLXContext.setSwapInterval using: "+GLXExtensions.GLX_SGI_swap_control); }
+                hasSwapInterval =  2;
+            } else {
+                hasSwapInterval = -1;
+            }
+        } catch (Throwable t) { hasSwapInterval=-1; }
+    } 
+    /* try {
+        switch( hasSwapInterval ) {
+            case 1:
+                return 0 == glXExt.glXSwapIntervalMESA(interval);
+            case 2:
+                return 0 == glXExt.glXSwapIntervalSGI(interval);
+        }
+    } catch (Throwable t) { hasSwapInterval = -1; } */
+    if (2 == hasSwapInterval) {
         try {
             return 0 == glXExt.glXSwapIntervalSGI(interval);
-        } catch (Throwable t) { hasSwapIntervalSGI=-1; }
+        } catch (Throwable t) { hasSwapInterval=-1; }
     }
     return false;
   }
@@ -534,10 +553,10 @@ public abstract class X11GLXContext extends GLContextImpl {
   private final int initSwapGroupImpl(GLXExt glXExt) {
       if(0==hasSwapGroupNV) {
         try {
-            hasSwapGroupNV = glXExt.isExtensionAvailable("GLX_NV_swap_group")?1:-1;
+            hasSwapGroupNV = glXExt.isExtensionAvailable(GLXExtensions.GLX_NV_swap_group)?1:-1;
         } catch (Throwable t) { hasSwapGroupNV=1; }
         if(DEBUG) {
-            System.err.println("initSwapGroupImpl: hasSwapGroupNV: "+hasSwapGroupNV);
+            System.err.println("initSwapGroupImpl: "+GLXExtensions.GLX_NV_swap_group+": "+hasSwapGroupNV);
         }
       }
       return hasSwapGroupNV;
diff --git a/src/test-native/contextRetargetDrawable01.c b/src/test-native/contextRetargetDrawable01.c
new file mode 100644
index 000000000..bad6c661f
--- /dev/null
+++ b/src/test-native/contextRetargetDrawable01.c
@@ -0,0 +1,154 @@
+/**
+ * compile with: gcc -o contextRetargetDrawable01 contextRetargetDrawable01.c -lX11 -lGL
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <X11/X.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <GL/glx.h>
+#include <GL/gl.h>
+
+static PFNGLXSWAPINTERVALSGIPROC _glXSwapIntervalSGI = NULL;
+
+static void testRetarget();
+
+static const char * msg = "contextRetargetDrawable01";
+
+static const useconds_t demodelay = 2 * 1000 * 1000;
+
+int main(int nargs, char **vargs) {
+    _glXSwapIntervalSGI = (PFNGLXSWAPINTERVALSGIPROC) glXGetProcAddressARB("glXSwapIntervalSGI");
+    if(NULL == _glXSwapIntervalSGI) {
+        fprintf(stderr, "No glXSwapIntervalSGI avail, bail out\n");
+        return 1;
+    }
+    testRetarget();
+    return 0;
+}
+
+static void createGLWin(Display *dpy, int width, int height, Window *rWin, GLXContext *rCtx);
+static void useGL(Display *dpy, Window win, GLXContext ctx, int width, int height, float c, int swapInterval);
+
+static void testRetarget() {
+    int major, minor;
+    Display *disp1;
+    Window win1;
+    GLXContext ctx1;
+
+    Display *disp2;
+    Window win2;
+    GLXContext ctx2;
+
+    fprintf(stderr, "%s: Create #1\n", msg);
+    disp1 = XOpenDisplay(NULL);
+    createGLWin(disp1, 200, 200, &win1, &ctx1);
+
+    fprintf(stderr, "%s: Create #2\n", msg);
+    disp2 = disp1;
+    // disp2 = XOpenDisplay(NULL);
+    createGLWin(disp2, 300, 300, &win2, &ctx2);
+
+    fprintf(stderr, "%s: Use #1.1\n", msg);
+    useGL(disp1, win1, ctx1, 200, 200, 0.0f, 1); // OK
+
+    fprintf(stderr, "%s: Use #1.2\n", msg);
+    useGL(disp2, win2, ctx2, 300, 300, 1.0f, 1); // OK
+
+    usleep( demodelay );
+
+    fprintf(stderr, "%s: Retarget Drawable\n", msg);
+    {
+        Window _win = win2;
+        win2 = win1;
+        win1 = _win;
+    }
+
+    fprintf(stderr, "%s: Use #2.1\n", msg);
+    useGL(disp1, win1, ctx1, 200, 200, 0.0f, 0); // no setSwapInterval - OK
+
+    fprintf(stderr, "%s: Use #2.2\n", msg);
+    useGL(disp2, win2, ctx2, 300, 300, 1.0f, 0); // no setSwapInterval - OK
+
+    usleep( demodelay );
+
+    fprintf(stderr, "%s: Use #3.1\n", msg);
+    useGL(disp1, win1, ctx1, 200, 200, 0.1f, 1); // setSwapInterval - crash on Mesa 8.0.4 DRI2
+
+    fprintf(stderr, "%s: Use #3.2\n", msg);
+    useGL(disp2, win2, ctx2, 300, 300, 0.9f, 1); // setSwapInterval - crash on Mesa 8.0.4 DRI2
+
+    fprintf(stderr, "%s: Success - no bug\n", msg);
+
+    usleep( demodelay );
+
+    fprintf(stderr, "%s: Destroy #1.0\n", msg);
+    glXMakeContextCurrent(disp1, 0, 0, 0);
+    glXDestroyContext(disp1, ctx1);
+    if( disp1 != disp2 ) {
+        XCloseDisplay(disp1);
+    }
+    fprintf(stderr, "%s: Destroy #1.X\n", msg);
+
+    fprintf(stderr, "%s: Destroy #2.0\n", msg);
+    glXMakeContextCurrent(disp2, 0, 0, 0);
+    glXDestroyContext(disp2, ctx2);
+    XCloseDisplay(disp2);
+    fprintf(stderr, "%s: Destroy #2.X\n", msg);
+
+    fprintf(stderr, "%s: Exit - OK\n", msg);
+}
+
+static void useGL(Display *dpy, Window win, GLXContext ctx, int width, int height, float c, int swapInterval)
+{
+    glXMakeContextCurrent(dpy, win, win, ctx);
+    glViewport(0, 0, width, height);
+    if(0 < swapInterval) {
+        fprintf(stderr, "%s: glXSwapIntervalSGI(1)\n", msg);
+        _glXSwapIntervalSGI(1); // offending op after retargeting drawable
+    }
+    fprintf(stderr, "GL_VENDOR: %s\n", glGetString(GL_VENDOR));
+    fprintf(stderr, "GL_VERSION: %s\n", glGetString(GL_VERSION));
+    fprintf(stderr, "GL_RENDERER: %s\n", glGetString(GL_RENDERER));
+    glClearColor(c, c, c, 0.0f);
+    glClearDepth(1.0f);
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+    glXSwapBuffers(dpy, win);
+    glXMakeContextCurrent(dpy, 0, 0, 0);
+}
+
+/* attributes for a double buffered visual in RGBA format with at least
+ * 4 bits per color and a 16 bit depth buffer */
+static int attrListDbl[] = { GLX_RGBA, GLX_DOUBLEBUFFER, 
+    GLX_RED_SIZE, 4, 
+    GLX_GREEN_SIZE, 4, 
+    GLX_BLUE_SIZE, 4, 
+    GLX_DEPTH_SIZE, 16,
+    None };
+
+static void createGLWin(Display *dpy, int width, int height, Window *rWin, GLXContext *rCtx)
+{
+    int screen = DefaultScreen(dpy);
+    XVisualInfo *vi = glXChooseVisual(dpy, screen, attrListDbl);
+    Colormap cmap;
+    XSetWindowAttributes attr;
+
+    /* create a GLX context */
+    *rCtx = glXCreateContext(dpy, vi, 0, GL_TRUE);
+
+    /* create a color map */
+    cmap = XCreateColormap(dpy, RootWindow(dpy, vi->screen), vi->visual, AllocNone);
+    attr.colormap = cmap;
+    attr.border_pixel = 0;
+
+    /* create a window in window mode*/
+    attr.event_mask = ExposureMask | KeyPressMask | ButtonPressMask |
+        StructureNotifyMask;
+    *rWin = XCreateWindow(dpy, RootWindow(dpy, vi->screen),
+        0, 0, width, height, 0, vi->depth, InputOutput, vi->visual,
+        CWBorderPixel | CWColormap | CWEventMask, &attr);
+
+    XMapRaised(dpy, *rWin);
+}
+
diff --git a/src/test-native/contextRetargetDrawable02.c b/src/test-native/contextRetargetDrawable02.c
new file mode 100644
index 000000000..3d0807b78
--- /dev/null
+++ b/src/test-native/contextRetargetDrawable02.c
@@ -0,0 +1,382 @@
+/**
+ * compile with: gcc -o contextRetargetDrawable02 contextRetargetDrawable02.c -lX11 -lGL
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <X11/X.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <GL/glx.h>
+#include <GL/gl.h>
+
+typedef int bool;
+#define true 1
+#define false 0
+
+static PFNGLXSWAPINTERVALSGIPROC _glXSwapIntervalSGI = NULL;
+
+static void testRetarget(bool reverse);
+
+static const char * msg = "contextRetargetDrawable01";
+
+static const useconds_t demodelay = 2 * 1000 * 1000;
+
+int main(int nargs, char **vargs) {
+    _glXSwapIntervalSGI = (PFNGLXSWAPINTERVALSGIPROC) glXGetProcAddressARB("glXSwapIntervalSGI");
+    if(NULL == _glXSwapIntervalSGI) {
+        fprintf(stderr, "No glXSwapIntervalSGI avail, bail out\n");
+        return 1;
+    }
+    testRetarget(false);
+    return 0;
+}
+
+static void createGLWin(Display *dpy, int width, int height, Window *rWin, GLXContext *rCtx);
+static void useGL(Display *dpy, Window win, GLXContext ctx, int width, int height, float c, int swapInterval);
+
+static void testRetarget(bool reverse) {
+    int major, minor;
+    Display *disp1;
+    Window win1;
+    GLXContext ctx1;
+
+    Display *disp2;
+    Window win2;
+    GLXContext ctx2;
+
+    fprintf(stderr, "%s: Create #1\n", msg);
+    disp1 = XOpenDisplay(NULL);
+    createGLWin(disp1, 200, 200, &win1, &ctx1);
+
+    fprintf(stderr, "%s: Create #2\n", msg);
+    disp2 = disp1;
+    // disp2 = XOpenDisplay(NULL);
+    createGLWin(disp2, 300, 300, &win2, &ctx2);
+
+    fprintf(stderr, "%s: Use #1.1\n", msg);
+    useGL(disp1, win1, ctx1, 200, 200, 0.0f, 1); // OK
+
+    fprintf(stderr, "%s: Use #1.2\n", msg);
+    useGL(disp2, win2, ctx2, 300, 300, 1.0f, 1); // OK
+
+    usleep( demodelay );
+
+    fprintf(stderr, "%s: Retarget Drawable\n", msg);
+    {
+        GLXContext _ctx = ctx2;
+        ctx2 = ctx1;
+        ctx1 = _ctx;
+    }
+
+    /**
+    if(reverse) {
+        fprintf(stderr, "%s: Use #2.2\n", msg);
+        useGL(disp2, win2, ctx2, 300, 300, 1.0f, 0); // no setSwapInterval - OK
+
+        fprintf(stderr, "%s: Use #2.1\n", msg);
+        useGL(disp1, win1, ctx1, 200, 200, 0.0f, 0); // no setSwapInterval - OK
+    } else {
+        fprintf(stderr, "%s: Use #2.1\n", msg);
+        useGL(disp1, win1, ctx1, 200, 200, 0.0f, 0); // no setSwapInterval - OK
+
+        fprintf(stderr, "%s: Use #2.2\n", msg);
+        useGL(disp2, win2, ctx2, 300, 300, 1.0f, 0); // no setSwapInterval - OK
+    }
+    usleep( demodelay ); */
+
+    if(reverse) {
+        fprintf(stderr, "%s: Use #3.2\n", msg);
+        useGL(disp2, win2, ctx2, 300, 300, 0.9f, 1); // setSwapInterval - crash on Mesa 8.0.4 DRI2
+
+        fprintf(stderr, "%s: Use #3.1\n", msg);
+        useGL(disp1, win1, ctx1, 200, 200, 0.1f, 1); // setSwapInterval - crash on Mesa 8.0.4 DRI2
+    } else {
+        fprintf(stderr, "%s: Use #3.1\n", msg);
+        useGL(disp1, win1, ctx1, 200, 200, 0.1f, 1); // setSwapInterval - crash on Mesa 8.0.4 DRI2
+
+        fprintf(stderr, "%s: Use #3.2\n", msg);
+        useGL(disp2, win2, ctx2, 300, 300, 0.9f, 1); // setSwapInterval - crash on Mesa 8.0.4 DRI2
+    }
+    fprintf(stderr, "%s: Success - no bug\n", msg);
+    usleep( demodelay );
+
+    fprintf(stderr, "%s: Destroy #1.0\n", msg);
+    glXMakeContextCurrent(disp1, 0, 0, 0);
+    glXDestroyContext(disp1, ctx1);
+    if( disp1 != disp2 ) {
+        XCloseDisplay(disp1);
+    }
+    fprintf(stderr, "%s: Destroy #1.X\n", msg);
+
+    fprintf(stderr, "%s: Destroy #2.0\n", msg);
+    glXMakeContextCurrent(disp2, 0, 0, 0);
+    glXDestroyContext(disp2, ctx2);
+    XCloseDisplay(disp2);
+    fprintf(stderr, "%s: Destroy #2.X\n", msg);
+
+    fprintf(stderr, "%s: Exit - OK\n", msg);
+}
+
+static void useGL(Display *dpy, Window win, GLXContext ctx, int width, int height, float c, int swapInterval)
+{
+    glXMakeContextCurrent(dpy, win, win, ctx);
+    glViewport(0, 0, width, height);
+    if(0 < swapInterval) {
+        fprintf(stderr, "%s: glXSwapIntervalSGI(1)\n", msg);
+        _glXSwapIntervalSGI(1); // offending op after retargeting drawable
+    }
+    fprintf(stderr, "GL_VENDOR: %s\n", glGetString(GL_VENDOR));
+    fprintf(stderr, "GL_VERSION: %s\n", glGetString(GL_VERSION));
+    fprintf(stderr, "GL_RENDERER: %s\n", glGetString(GL_RENDERER));
+    glClearColor(c, c, c, 0.0f);
+    glClearDepth(1.0f);
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+    glXSwapBuffers(dpy, win);
+    glXMakeContextCurrent(dpy, 0, 0, 0);
+}
+
+static volatile bool ctxErrorOccurred = false;
+static int ctxErrorHandler( Display *dpy, XErrorEvent *e )
+{
+    const char * errnoStr = strerror(errno);
+    char errCodeStr[80];
+    char reqCodeStr[80];
+
+    snprintf(errCodeStr, sizeof(errCodeStr), "%d", e->request_code);
+    XGetErrorDatabaseText(dpy, "XRequest", errCodeStr, "Unknown", reqCodeStr, sizeof(reqCodeStr));
+    XGetErrorText(dpy, e->error_code, errCodeStr, sizeof(errCodeStr));
+
+    fprintf(stderr, "X11 Error: %d - %s, dpy %p, id %x, # %d: %d:%d %s\n",
+        e->error_code, errCodeStr, e->display, (int)e->resourceid, (int)e->serial,
+        (int)e->request_code, (int)e->minor_code, reqCodeStr);
+    fflush(stderr);
+
+    ctxErrorOccurred = true;
+    return 0;
+}
+
+/* attributes for a double buffered visual in RGBA format with at least
+ * 8 bits per color and a 16 bit depth buffer */
+static int visual_attribs[] = {
+  GLX_X_RENDERABLE    , True,
+  GLX_DRAWABLE_TYPE   , GLX_WINDOW_BIT,
+  GLX_RENDER_TYPE     , GLX_RGBA_BIT,
+  GLX_RED_SIZE        , 8,
+  GLX_GREEN_SIZE      , 8,
+  GLX_BLUE_SIZE       , 8,
+  GLX_DEPTH_SIZE      , 16,
+  GLX_DOUBLEBUFFER    , True,
+  GLX_STEREO          , False,
+  GLX_TRANSPARENT_TYPE, GLX_NONE,
+  //GLX_SAMPLE_BUFFERS  , 1,
+  //GLX_SAMPLES         , 4,
+  None };
+
+static int context_attribs[] = {
+    GLX_CONTEXT_MAJOR_VERSION_ARB, 3,
+    GLX_CONTEXT_MINOR_VERSION_ARB, 0,
+    GLX_RENDER_TYPE              , GLX_RGBA_TYPE,
+    GLX_CONTEXT_FLAGS_ARB        , 0,
+    // GLX_CONTEXT_FLAGS_ARB        , GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB,
+    // GLX_CONTEXT_PROFILE_MASK_ARB , GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB,
+    None };
+
+static bool isExtensionSupported(const char *extList, const char *extension);
+
+static void createGLWin(Display *dpy, int width, int height, Window *rWin, GLXContext *rCtx)
+{
+    int glx_major, glx_minor;
+ 
+    // FBConfigs were added in GLX version 1.3.
+    if ( !glXQueryVersion( dpy, &glx_major, &glx_minor ) || 
+       ( ( glx_major == 1 ) && ( glx_minor < 3 ) ) || ( glx_major < 1 ) )
+    {
+        printf( "Invalid GLX version" );
+        exit(1);
+    }
+
+    int fbcount;
+    GLXFBConfig *fbc = glXChooseFBConfig( dpy, DefaultScreen( dpy ), 
+                                        visual_attribs, &fbcount );
+    if ( !fbc || 0 == fbcount )
+    {
+        printf( "Failed to retrieve a framebuffer config\n" );
+        exit(1);
+    }
+    printf( "Found %d matching FB configs.\n", fbcount );
+
+    GLXFBConfig bestFbc = fbc[ 0 ];
+    int bestFbcID = 0;
+    if( 0 != glXGetFBConfigAttrib( dpy, bestFbc, GLX_FBCONFIG_ID, &bestFbcID ) ) {
+        printf( "Invalid FBConfigID\n" );
+        exit(1);
+    }
+    printf( "Chosen FBConfigID = 0x%x\n", bestFbcID);
+
+    XVisualInfo *vi = glXGetVisualFromFBConfig( dpy, bestFbc );
+    printf( "Chosen visual ID = 0x%x\n", (int) vi->visualid );
+
+    XSetWindowAttributes swa;
+    Colormap cmap;
+    swa.colormap = cmap = XCreateColormap( dpy,
+                                         RootWindow( dpy, vi->screen ), 
+                                         vi->visual, AllocNone );
+    swa.background_pixmap = None ;
+    swa.border_pixel      = 0;
+    swa.event_mask        = StructureNotifyMask;
+
+    printf( "Creating window\n" );
+    Window win = XCreateWindow( dpy, RootWindow( dpy, vi->screen ), 
+                                0, 0, width, height, 0, vi->depth, InputOutput,
+                                vi->visual, 
+                                CWBorderPixel|CWColormap|CWEventMask, &swa );
+    if ( !win )
+    {
+        printf( "Failed to create window.\n" );
+        exit(1);
+    }
+
+    // Done with the visual info data
+    XFree( vi );
+
+    XStoreName( dpy, win, "GL Window" );
+
+    XMapWindow( dpy, win );
+
+    *rWin = win;
+
+    GLXContext ctx0 = glXCreateNewContext( dpy, bestFbc, GLX_RGBA_TYPE, 0, True );
+    if( !ctx0 ) {
+        printf( "Failed to create intermediate old OpenGL context\n" );
+        exit(1);
+    }
+    glXMakeContextCurrent(dpy, win, win, ctx0);
+
+
+    // Get the default screen's GLX extension list
+    const char *glxExts01 = glXQueryExtensionsString( dpy,
+                                                  DefaultScreen( dpy ) );
+    const char *glxExts02 = glXGetClientString( dpy, GLX_EXTENSIONS);
+    const char *glxExts03 = glXQueryServerString( dpy, DefaultScreen( dpy ), GLX_EXTENSIONS);
+
+    // NOTE: It is not necessary to create or make current to a context before
+    // calling glXGetProcAddressARB
+    PFNGLXCREATECONTEXTATTRIBSARBPROC _glXCreateContextAttribsARB = 0;
+    _glXCreateContextAttribsARB = (PFNGLXCREATECONTEXTATTRIBSARBPROC)
+           glXGetProcAddressARB( (const GLubyte *) "glXCreateContextAttribsARB" );
+
+    // Check for the GLX_ARB_create_context extension string and the function.
+    // If either is not present, use GLX 1.3 context creation method.
+    bool isGLX_ARB_create_contextAvail = isExtensionSupported( glxExts01, "GLX_ARB_create_context" ) || 
+                                         isExtensionSupported( glxExts02, "GLX_ARB_create_context" ) ||
+                                         isExtensionSupported( glxExts03, "GLX_ARB_create_context" );
+
+    glXMakeContextCurrent(dpy, 0, 0, 0);
+
+    GLXContext ctx = 0;
+
+    // Install an X error handler so the application won't exit if GL 3.0
+    // context allocation fails.
+    //
+    // Note this error handler is global.  All display connections in all threads
+    // of a process use the same error handler, so be sure to guard against other
+    // threads issuing X commands while this code is running.
+    int (*oldHandler)(Display*, XErrorEvent*) =
+      XSetErrorHandler(&ctxErrorHandler);
+
+    if ( !isGLX_ARB_create_contextAvail || !_glXCreateContextAttribsARB )
+    {
+        printf( "glXCreateContextAttribsARB() not found (ext %d, func %p)"
+                " ... using old-style GLX context\n", isGLX_ARB_create_contextAvail, _glXCreateContextAttribsARB );
+        printf( "extensions 01: %s\n", glxExts01);
+        printf( "extensions 02: %s\n", glxExts02);
+        printf( "extensions 03: %s\n", glxExts03);
+        ctx = ctx0;
+    }
+
+    // If it does, try to get a GL 3.0 context!
+    else
+    {
+        printf( "Creating context\n" );
+        XSync( dpy, False );
+        ctxErrorOccurred = false;
+        ctx = _glXCreateContextAttribsARB( dpy, bestFbc, 0, True, context_attribs );
+        XSync( dpy, False );
+
+        if ( !ctxErrorOccurred && ctx ) {
+          printf( "Created GL 3.0 context\n" );
+          glXDestroyContext(dpy, ctx0); // get rid of old ctx
+        } else
+        {
+          // Couldn't create GL 3.0 context.  Fall back to old-style 2.x context.
+          // When a context version below 3.0 is requested, implementations will
+          // return the newest context version compatible with OpenGL versions less
+          // than version 3.0.
+          // GLX_CONTEXT_MAJOR_VERSION_ARB = 1
+          context_attribs[1] = 1;
+          // GLX_CONTEXT_MINOR_VERSION_ARB = 0
+          context_attribs[3] = 0;
+
+          printf( "Failed to create GL 3.0 context (err %d, ctx %p)"
+                  " ... using old-style GLX context\n", ctxErrorOccurred, (void*)ctx );
+          ctx = ctx0;
+
+          ctxErrorOccurred = false;
+        }
+    }
+
+    // Sync to ensure any errors generated are processed.
+    XSync( dpy, False );
+
+    // Restore the original error handler
+    XSetErrorHandler( oldHandler );
+
+    if ( ctxErrorOccurred || !ctx )
+    {
+        printf( "Failed to create an OpenGL context\n" );
+        exit(1);
+    }
+
+    XFree( fbc );
+
+    *rCtx = ctx;
+}
+
+// Helper to check for extension string presence.  Adapted from:
+//   http://www.opengl.org/resources/features/OGLextensions/
+static bool isExtensionSupported(const char *extList, const char *extension)
+{
+
+  const char *start;
+  const char *where, *terminator;
+  
+  /* Extension names should not have spaces. */
+  where = strchr(extension, ' ');
+  if ( where || *extension == '\0' )
+    return false;
+
+  /* It takes a bit of care to be fool-proof about parsing the
+     OpenGL extensions string. Don't be fooled by sub-strings,
+     etc. */
+  for ( start = extList; ; ) {
+    where = strstr( start, extension );
+
+    if ( !where )
+      break;
+
+    terminator = where + strlen( extension );
+
+    if ( where == start || *(where - 1) == ' ' )
+      if ( *terminator == ' ' || *terminator == '\0' )
+        return true;
+
+    start = terminator;
+  }
+
+  return false;
+}
+
diff --git a/src/test-native/glExtensionsListGL2.c b/src/test-native/glExtensionsListGL2.c
index 89815e9c0..ea47b8c69 100644
--- a/src/test-native/glExtensionsListGL2.c
+++ b/src/test-native/glExtensionsListGL2.c
@@ -77,6 +77,8 @@ void useGL(Display *dpy, Window win, GLXContext ctx, int width, int height)
     glXMakeCurrent(dpy, win, ctx);
 
     fprintf(stderr, "GL_VENDOR: %s\n", glGetString(GL_VENDOR));
+    fprintf(stderr, "GL_VERSION: %s\n", glGetString(GL_VERSION));
+    fprintf(stderr, "GL_RENDERER: %s\n", glGetString(GL_RENDERER));
 
     glGetIntegerv(GL_NUM_EXTENSIONS, &n);
     fprintf(stderr, "GL_NUM_EXTENSIONS: %d\n", n);
diff --git a/src/test-native/glExtensionsListGL3.c b/src/test-native/glExtensionsListGL3.c
index c531577e8..5875c10bc 100644
--- a/src/test-native/glExtensionsListGL3.c
+++ b/src/test-native/glExtensionsListGL3.c
@@ -59,6 +59,8 @@ void dumpGLExtension() {
     int i, n;
 
     fprintf(stderr, "GL_VENDOR: %s\n", glGetString(GL_VENDOR));
+    fprintf(stderr, "GL_VERSION: %s\n", glGetString(GL_VERSION));
+    fprintf(stderr, "GL_RENDERER: %s\n", glGetString(GL_RENDERER));
 
     glGetIntegerv(GL_NUM_EXTENSIONS, &n);
     fprintf(stderr, "GL_NUM_EXTENSIONS: %d\n", n);
@@ -153,9 +155,6 @@ int main (int argc, char ** argv)
 
   GLXFBConfig bestFbc = fbc[ best_fbc ];
 
-  // Be sure to free the FBConfig list allocated by glXChooseFBConfig()
-  XFree( fbc );
-
   // Get a visual
   XVisualInfo *vi = glXGetVisualFromFBConfig( display, bestFbc );
   printf( "Chosen visual ID = 0x%x\n", (int) vi->visualid );
@@ -190,8 +189,9 @@ int main (int argc, char ** argv)
   XMapWindow( display, win );
 
   // Get the default screen's GLX extension list
-  const char *glxExts = glXQueryExtensionsString( display,
-                                                  DefaultScreen( display ) );
+  const char *glxExts01 = glXQueryExtensionsString( display, DefaultScreen( display ) );
+  const char *glxExts02 = glXGetClientString( display, GLX_EXTENSIONS);
+  const char *glxExts03 = glXQueryServerString( display, DefaultScreen( display ), GLX_EXTENSIONS);
 
   // NOTE: It is not necessary to create or make current to a context before
   // calling glXGetProcAddressARB
@@ -213,11 +213,16 @@ int main (int argc, char ** argv)
 
   // Check for the GLX_ARB_create_context extension string and the function.
   // If either is not present, use GLX 1.3 context creation method.
-  if ( !isExtensionSupported( glxExts, "GLX_ARB_create_context" ) ||
-       !glXCreateContextAttribsARB )
+  bool isGLX_ARB_create_contextAvail = isExtensionSupported( glxExts01, "GLX_ARB_create_context" ) || 
+                                       isExtensionSupported( glxExts02, "GLX_ARB_create_context" ) ||
+                                       isExtensionSupported( glxExts03, "GLX_ARB_create_context" );
+  if ( !isGLX_ARB_create_contextAvail || !glXCreateContextAttribsARB )
   {
     printf( "glXCreateContextAttribsARB() not found"
             " ... using old-style GLX context\n" );
+    printf( "extensions 01: %s\n", glxExts01);
+    printf( "extensions 02: %s\n", glxExts02);
+    printf( "extensions 03: %s\n", glxExts03);
     ctx = glXCreateNewContext( display, bestFbc, GLX_RGBA_TYPE, 0, True );
   }
 
@@ -229,7 +234,8 @@ int main (int argc, char ** argv)
         GLX_CONTEXT_MAJOR_VERSION_ARB, 3,
         GLX_CONTEXT_MINOR_VERSION_ARB, 0,
         GLX_RENDER_TYPE              , GLX_RGBA_TYPE,
-        GLX_CONTEXT_FLAGS_ARB        , GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB,
+        // GLX_CONTEXT_FLAGS_ARB        , GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB,
+        // GLX_CONTEXT_PROFILE_MASK_ARB , GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB
         None
       };
 
@@ -261,6 +267,9 @@ int main (int argc, char ** argv)
     }
   }
 
+  // Be sure to free the FBConfig list allocated by glXChooseFBConfig()
+  XFree( fbc );
+
   // Sync to ensure any errors generated are processed.
   XSync( display, False );
 
diff --git a/src/test-native/make.sh b/src/test-native/make.sh
index 20bd49e4a..269f09c35 100755
--- a/src/test-native/make.sh
+++ b/src/test-native/make.sh
@@ -4,3 +4,5 @@ gcc -o displayMultiple01 displayMultiple01.c -lX11 -lGL
 gcc -o displayMultiple02 displayMultiple02.c -lX11 -lGL
 gcc -o glExtensionsListGL2 glExtensionsListGL2.c -lX11 -lGL
 gcc -o glExtensionsListGL3 glExtensionsListGL3.c -lX11 -lGL
+gcc -o contextRetargetDrawable01 contextRetargetDrawable01.c -lX11 -lGL
+gcc -o contextRetargetDrawable02 contextRetargetDrawable02.c -lX11 -lGL
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/GearsES2.java b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/GearsES2.java
index d991e7635..47feb60e2 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/GearsES2.java
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/GearsES2.java
@@ -194,7 +194,8 @@ public class GearsES2 implements GLEventListener {
     }
 
     public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {
-        System.err.println(Thread.currentThread()+" GearsES2.reshape "+x+"/"+y+" "+width+"x"+height+", swapInterval "+swapInterval);
+        System.err.println(Thread.currentThread()+" GearsES2.reshape "+x+"/"+y+" "+width+"x"+height+", swapInterval "+swapInterval+", drawable 0x"+Long.toHexString(drawable.getHandle()));
+        // Thread.dumpStack();
         GL2ES2 gl = drawable.getGL().getGL2ES2();
 
         if(-1 != swapInterval) {
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/RedSquareES2.java b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/RedSquareES2.java
index 9629d2102..fea1d752e 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/RedSquareES2.java
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/RedSquareES2.java
@@ -160,7 +160,8 @@ public class RedSquareES2 implements GLEventListener {
     }
 
     public void reshape(GLAutoDrawable glad, int x, int y, int width, int height) {
-        System.err.println(Thread.currentThread()+" RedSquareES2.reshape "+x+"/"+y+" "+width+"x"+height+", swapInterval "+swapInterval);        
+        System.err.println(Thread.currentThread()+" RedSquareES2.reshape "+x+"/"+y+" "+width+"x"+height+", swapInterval "+swapInterval+", drawable 0x"+Long.toHexString(glad.getHandle()));
+        // Thread.dumpStack();
         GL2ES2 gl = glad.getGL().getGL2ES2();
         
         if(-1 != swapInterval) {