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/windows/wgl/WindowsWGLContext.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLContext.java
index b2be87f4f..66c203a44 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLContext.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLContext.java
@@ -421,8 +421,8 @@ public class WindowsWGLContext extends GLContextImpl {
     }
   }
   
-  protected final StringBuffer getPlatformExtensionsStringImpl() {
-    StringBuffer sb = new StringBuffer();
+  protected final StringBuilder getPlatformExtensionsStringImpl() {
+    StringBuilder sb = new StringBuilder();
     
     if (!wglGetExtensionsStringEXTInitialized) {
       wglGetExtensionsStringEXTAvailable = (WGL.wglGetProcAddress("wglGetExtensionsStringEXT") != 0);