Only use base pipelines for Trace/Debug, mock others (ES2, GL2, ..); BuildComposablePipeline: Unify GL identify methods

- Only use base pipelines for Trace/Debug, mock others (ES2, GL2, ..)
  The Trace/Debug generated pipelines consume quite some space
  and only the actual GL*Impl pipeline is actually required.

  To make this work, we have to identify the GL type via it's downstream instance
  to implement isGL*() and getGL*() methods, see below!

  Adding dummy Trace/Debug type wrapper for GL2, GL3, GL3bc, GL4 and GLES2.

BuildComposablePipeline: Unify GL identify methods
  As described above, Trace/Debug shall utilize downstream identification for isGL*() and getGL*() methods.

  Custom types, like FixedFuncImpl may choose to be identified by their class inheritance,
  by passing command-line argument 'gl_identity_by_assignable_class'.

1 files changed, 23 insertions, 0 deletions

diff --git a/src/jogl/classes/javax/media/opengl/TraceGL3.java b/src/jogl/classes/javax/media/opengl/TraceGL3.java
new file mode 100644
index 000000000..616b31f61
--- /dev/null
+++ b/src/jogl/classes/javax/media/opengl/TraceGL3.java
@@ -0,0 +1,23 @@
+package javax.media.opengl;
+
+import java.io.PrintStream;
+
+/**
+ * <p>
+ * Composable pipeline which wraps an underlying {@link GL} implementation,
+ * providing tracing information to a user-specified {@link java.io.PrintStream}
+ * before and after each OpenGL method call.
+ * </p>
+ * <p>
+ * Sample code which installs this pipeline, manual:
+ * <pre>
+ *     gl = drawable.setGL(new TraceGL(drawable.getGL(), System.err));
+ * </pre> 
+ * For automatic instantiation see {@link GLPipelineFactory#create(String, Class, GL, Object[])}.
+ * </p>
+ */
+public class TraceGL3 extends TraceGL4bc {
+    public TraceGL3(GL3 downstream, PrintStream stream) {
+        super((GL4bc)downstream, stream);
+    }
+}