Enhance ExtensionAvailabilityCache ; Expose extension count in GLContext (and clean up)

- GLContext
  - Expose isFunctionAvailable(), isExtensionAvailable(),
           getPlatformExtensionCount(), getGLExtensionCount()
  - sort methods a bit

ExtensionAvailabilityCache:
  - Favor StringBuilder instead of StringBuffer (faster)
  - Resuse set's
  - Hold dedicated counts of extensions, platform and GL

1 files changed, 2 insertions, 2 deletions

diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLContext.java b/src/jogl/classes/jogamp/opengl/egl/EGLContext.java
index 60766a57d..24095c749 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLContext.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLContext.java
@@ -248,8 +248,8 @@ public abstract class EGLContext extends GLContextImpl {
         }
     }
   
-    protected final StringBuffer getPlatformExtensionsStringImpl() {
-        StringBuffer sb = new StringBuffer();        
+    protected final StringBuilder getPlatformExtensionsStringImpl() {
+        StringBuilder sb = new StringBuilder();        
         if (!eglQueryStringInitialized) {
           eglQueryStringAvailable =
             getDrawableImpl().getGLDynamicLookupHelper().dynamicLookupFunction("eglQueryString") != 0;