Changes

GLContextImpl: Move sharedContextHandle check to makeCurrentWithinLock(..) and let it fail there instead of within impl. class, only pass the handle - simplifies and removes redundancy.

Bug 888 - Validate CPU Runtime Performance: X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(..)

X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(..) ran over all FB configs and for each it grabbed
native config values separately. Fetching them in bulk mode saves around 7% of this function's cost.

Also reuse XRenderPictFormat instance for 'XRenderDirectFormat XRenderFindVisualFormat(..)' call,
saving a few NIO creation cycles w/ StructAccessor.

Biggest savior is X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationFBConfig()'s
fast path w/o chooser and usable 1st FBConfig. Here we only issue 'GLXFBConfig2GLCapabilities(..)'
on the first valid entry.

Test w/ 50 X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationFBConfig() invocations:
  - pre change:  1.708 ms
  - post change:   650 ms

Time is no spent almost solely on native glXChooseFBConfig (546ms).

Bug 888 / Bug 891 - Enhance GLCapabilities-Query: Apply changes of commit 613e33ee8ffc1f2b9c5db1e1b5bb5253a159ed6d to EGL and WGL.

Note: WGL config query is already performed as a bulk operation.
Note: OSX does not perform such queries.

Bug 888 - Validate CPU Runtime Performance: Only use one HashMap to collect unified gl- and glx-extension strings.

- HashMap is more efficient than HashSet
- No need to use sub HashSet's .. we can use global HashMap.
  'Loosing' duplicate GLX entries due to GL duplicates is acceptable.

Test DumpGLInfo: Dump caps list and extenions

Bug 888 / Bug 891- Enhance GLCapabilities-Query: Add perf. test case

Even though the test case itself cannot show the proper initialization time,
it can be used w/ an attached profiler i.e.

    Test w/ 50 X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationFBConfig() invocations:
      - pre change:  1.708 ms
      - post change:   650 ms  (613e33ee8ffc1f2b9c5db1e1b5bb5253a159ed6d)

Bug 888 / Bug 891- Enhance GLCapabilities-Query: Add raw perf. test case 'choose' only and 'full' offscreen-drawable w/ context

test01ChooseOnly exposes X11/GLX perf. enhancement of 613e33ee8ffc1f2b9c5db1e1b5bb5253a159ed6d:

PRE CHANGE:
++++ UITestCase.setUp: com.jogamp.opengl.test.junit.jogl.perf.TestPerf001RawInit00NEWT - test01ChooseOnly
INIT START #0
Run: 0, count 50/50 raw:
        choose     503/t  10.06/1
INIT END #0
INIT START #1
Run: 1, count 50/50 raw:
        choose     384/t   7.68/1
INIT END #1
INIT START #2
Run: 2, count 50/50 raw:
        choose     344/t   6.88/1
INIT END #2

POST CHANGE:
++++ UITestCase.setUp: com.jogamp.opengl.test.junit.jogl.perf.TestPerf001RawInit00NEWT - test01ChooseOnly
INIT START #0
Run: 0, count 50/50 raw:
        choose      49/t   0.98/1
INIT END #0
INIT START #1
Run: 1, count 50/50 raw:
        choose      43/t   0.86/1
INIT END #1
INIT START #2
Run: 2, count 50/50 raw:
        choose      38/t   0.76/1
INIT END #2

JNI Code: Call DeleteLocalRef(..) manually.

Bug 888 / Bug 891- Enhance GLCapabilities-Query: Refine unit tests

NEWT Window: Expose 'setVisible(boolean wait, boolean visible)' allowing applications to not block until window becomes visible.

NativeWindow *GraphicsDevice: Align constructors to simplify call hierarchy for analysis.

Bug 894 - GLDrawableFactory* [dummy|offscreen] Surface creation w/ own device does _not_ require locking on global shared device.

Bug 894 - GLJPanel: Expose 'initializeBackend(boolean offthread)' allowing user to trigger backend initialization eagerly and offthread (optional, !WINDOWS)

TestPerf001GLJPanelInit02AWT compares all variations: no-gl, glcanvas, gljpanel and gljpanel-initMT (offthread)