Fix bug 564 (X11 Mesa 8.0.1 GL 3.0 w/o GLX_ARB_create_context)

X11/Mesa 8.0.1 offers a GL 3.0 context w/o
having the GLX_ARB_create_context extension available
(even though the func-ptr glXCreateContextAttribsARB is not null).

We assumed that if no GLContext device availability is set,
it can be only GL 2.0 or ES1/ES2.

Fix: Relaxed these (false) constrains and map the created context
     reflecting using it's actual attributes.

1 files changed, 6 insertions, 4 deletions

diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXContext.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXContext.java
index 12bb2a9a6..08e064da5 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXContext.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXContext.java
@@ -335,12 +335,13 @@ public abstract class X11GLXContext extends GLContextImpl {
           throw new GLException("Error making temp context(1) current: display "+toHexString(display)+", context "+toHexString(temp_ctx)+", drawable "+drawable);
         }
         setGLFunctionAvailability(true, 0, 0, CTX_PROFILE_COMPAT); // use GL_VERSION
-        boolean isCreateContextAttribsARBAvailable = isFunctionAvailable("glXCreateContextAttribsARB");
         glXMakeContextCurrent(display, 0, 0, 0); // release temp context
 
         if( !createContextARBTried ) {
-            if ( isCreateContextAttribsARBAvailable &&
-                 isExtensionAvailable("GLX_ARB_create_context") ) {
+            // is*Available calls are valid since setGLFunctionAvailability(..) was called
+            final boolean isProcCreateContextAttribsARBAvailable = isFunctionAvailable("glXCreateContextAttribsARB");
+            final boolean isExtARBCreateContextAvailable = isExtensionAvailable("GLX_ARB_create_context");
+            if ( isProcCreateContextAttribsARBAvailable && isExtARBCreateContextAvailable ) {
                 // initial ARB context creation
                 contextHandle = createContextARB(share, direct);
                 createContextARBTried=true;
@@ -352,7 +353,8 @@ public abstract class X11GLXContext extends GLContextImpl {
                     }
                 }
             } else if (DEBUG) {
-                System.err.println(getThreadName() + ": createContextImpl: NOT OK (ARB, initial) - extension not available - share "+share);
+                System.err.println(getThreadName() + ": createContextImpl: NOT OK (ARB, initial) - extension not available - share "+share+
+                                   ", isProcCreateContextAttribsARBAvailable "+isProcCreateContextAttribsARBAvailable+", isExtGLXARBCreateContextAvailable "+isExtARBCreateContextAvailable);
             }
         }
     }