- Moved most types and StructLayout to runtime package:

     com.jogamp.gluegen.cgram.types -> com.jogamp.gluegen.runtime.types
  This is required for desired runtime memory layout.

- Split CompoundType to StructType + UnionType

- StructLayout:
   - Utilizing SizeThunk alignment
   - Alignment
       1) Natural type alignment
       2) Add Size
       3) Trailing padding w/ largest element alignment
   - Only perform memory layout once for type.

Status:
 - Unit test passes w/ static MachineDescriptor64Bit
 - FIXME static 32bit is faulty, uses 64bit size/alignment

 - TODO runtime struct layout to please all platforms w/o worrying

39 files changed, 344 insertions, 208 deletions

diff --git a/src/java/com/jogamp/gluegen/CMethodBindingEmitter.java b/src/java/com/jogamp/gluegen/CMethodBindingEmitter.java
index d47cded..1087d15 100644
--- a/src/java/com/jogamp/gluegen/CMethodBindingEmitter.java
+++ b/src/java/com/jogamp/gluegen/CMethodBindingEmitter.java
@@ -45,6 +45,10 @@ import java.text.MessageFormat;
 
 import com.jogamp.common.os.MachineDescription;
 import com.jogamp.gluegen.cgram.types.*;
+import com.jogamp.gluegen.runtime.types.ArrayType;
+import com.jogamp.gluegen.runtime.types.PointerType;
+import com.jogamp.gluegen.runtime.types.Type;
+
 import java.util.logging.Logger;
 
 import static java.util.logging.Level.*;
diff --git a/src/java/com/jogamp/gluegen/DebugEmitter.java b/src/java/com/jogamp/gluegen/DebugEmitter.java
index fc536c8..6afc55c 100644
--- a/src/java/com/jogamp/gluegen/DebugEmitter.java
+++ b/src/java/com/jogamp/gluegen/DebugEmitter.java
@@ -43,6 +43,8 @@ import java.util.*;
 
 import com.jogamp.common.os.MachineDescription;
 import com.jogamp.gluegen.cgram.types.*;
+import com.jogamp.gluegen.runtime.types.CompoundType;
+import com.jogamp.gluegen.runtime.types.Type;
 
 /** Debug emitter which prints the parsing results to standard output. */
 
diff --git a/src/java/com/jogamp/gluegen/GlueEmitter.java b/src/java/com/jogamp/gluegen/GlueEmitter.java
index ed06b19..ac1065b 100644
--- a/src/java/com/jogamp/gluegen/GlueEmitter.java
+++ b/src/java/com/jogamp/gluegen/GlueEmitter.java
@@ -43,6 +43,8 @@ import java.util.*;
 
 import com.jogamp.common.os.MachineDescription;
 import com.jogamp.gluegen.cgram.types.*;
+import com.jogamp.gluegen.runtime.types.CompoundType;
+import com.jogamp.gluegen.runtime.types.Type;
 
 /** Specifies the interface by which GlueGen requests glue code to be
     generated. Can be replaced to generate glue code for other
diff --git a/src/java/com/jogamp/gluegen/GlueGen.java b/src/java/com/jogamp/gluegen/GlueGen.java
index c898058..9b0bb5f 100644
--- a/src/java/com/jogamp/gluegen/GlueGen.java
+++ b/src/java/com/jogamp/gluegen/GlueGen.java
@@ -52,6 +52,10 @@ import antlr.*;
 import com.jogamp.gluegen.cgram.*;
 import com.jogamp.gluegen.cgram.types.*;
 import com.jogamp.gluegen.pcpp.*;
+import com.jogamp.gluegen.runtime.types.CompoundType;
+import com.jogamp.gluegen.runtime.types.EnumType;
+import com.jogamp.gluegen.runtime.types.PointerType;
+import com.jogamp.gluegen.runtime.types.Type;
 
 import static java.lang.System.*;
 
diff --git a/src/java/com/jogamp/gluegen/JavaConfiguration.java b/src/java/com/jogamp/gluegen/JavaConfiguration.java
index 5323c77..90160f6 100644
--- a/src/java/com/jogamp/gluegen/JavaConfiguration.java
+++ b/src/java/com/jogamp/gluegen/JavaConfiguration.java
@@ -49,7 +49,9 @@ import java.util.Map.Entry;
 import java.util.regex.*;
 
 import com.jogamp.gluegen.jgram.*;
+import com.jogamp.gluegen.runtime.types.Type;
 import com.jogamp.gluegen.cgram.types.*;
+
 import java.util.logging.Logger;
 
 import static java.util.logging.Level.*;
diff --git a/src/java/com/jogamp/gluegen/JavaEmitter.java b/src/java/com/jogamp/gluegen/JavaEmitter.java
index d92e589..a3ee962 100644
--- a/src/java/com/jogamp/gluegen/JavaEmitter.java
+++ b/src/java/com/jogamp/gluegen/JavaEmitter.java
@@ -49,6 +49,14 @@ import java.util.*;
 import java.text.MessageFormat;
 
 import com.jogamp.gluegen.cgram.types.*;
+import com.jogamp.gluegen.runtime.types.CompoundType;
+import com.jogamp.gluegen.runtime.types.Field;
+import com.jogamp.gluegen.runtime.types.FunctionType;
+import com.jogamp.gluegen.runtime.types.PointerType;
+import com.jogamp.gluegen.runtime.types.SizeThunk;
+import com.jogamp.gluegen.runtime.types.StructLayout;
+import com.jogamp.gluegen.runtime.types.Type;
+
 import java.nio.Buffer;
 import java.util.logging.Logger;
 
@@ -1424,7 +1432,7 @@ public class JavaEmitter implements GlueEmitter {
 
   private StructLayout getLayout() {
     if (layout == null) {
-      layout = StructLayout.createForCurrentPlatform();
+      layout = StructLayout.create(0);
     }
     return layout;
   }
diff --git a/src/java/com/jogamp/gluegen/JavaMethodBindingEmitter.java b/src/java/com/jogamp/gluegen/JavaMethodBindingEmitter.java
index ce1acc2..b1512e3 100644
--- a/src/java/com/jogamp/gluegen/JavaMethodBindingEmitter.java
+++ b/src/java/com/jogamp/gluegen/JavaMethodBindingEmitter.java
@@ -40,11 +40,12 @@
 package com.jogamp.gluegen;
 
 import com.jogamp.gluegen.cgram.HeaderParser;
-import com.jogamp.gluegen.cgram.types.ArrayType;
-import com.jogamp.gluegen.cgram.types.CompoundType;
-import com.jogamp.gluegen.cgram.types.EnumType;
-import com.jogamp.gluegen.cgram.types.PointerType;
-import com.jogamp.gluegen.cgram.types.Type;
+import com.jogamp.gluegen.runtime.types.ArrayType;
+import com.jogamp.gluegen.runtime.types.CompoundType;
+import com.jogamp.gluegen.runtime.types.EnumType;
+import com.jogamp.gluegen.runtime.types.PointerType;
+import com.jogamp.gluegen.runtime.types.Type;
+
 import java.io.PrintWriter;
 import java.text.MessageFormat;
 import java.util.List;
diff --git a/src/java/com/jogamp/gluegen/JavaType.java b/src/java/com/jogamp/gluegen/JavaType.java
index 04d14de..1c1213e 100644
--- a/src/java/com/jogamp/gluegen/JavaType.java
+++ b/src/java/com/jogamp/gluegen/JavaType.java
@@ -43,6 +43,7 @@ package com.jogamp.gluegen;
 import java.nio.*;
 
 import com.jogamp.gluegen.cgram.types.*;
+import com.jogamp.gluegen.runtime.types.Type;
 
 /**
  * Describes a java-side representation of a type that is used to represent
diff --git a/src/java/com/jogamp/gluegen/MethodBinding.java b/src/java/com/jogamp/gluegen/MethodBinding.java
index a8d4b30..22625a1 100644
--- a/src/java/com/jogamp/gluegen/MethodBinding.java
+++ b/src/java/com/jogamp/gluegen/MethodBinding.java
@@ -40,7 +40,7 @@
 package com.jogamp.gluegen;
 
 import com.jogamp.gluegen.cgram.types.FunctionSymbol;
-import com.jogamp.gluegen.cgram.types.Type;
+import com.jogamp.gluegen.runtime.types.Type;
 
 import java.util.ArrayList;
 import java.util.Collection;
diff --git a/src/java/com/jogamp/gluegen/ReferencedStructs.java b/src/java/com/jogamp/gluegen/ReferencedStructs.java
index b8a176f..c00653d 100644
--- a/src/java/com/jogamp/gluegen/ReferencedStructs.java
+++ b/src/java/com/jogamp/gluegen/ReferencedStructs.java
@@ -41,6 +41,10 @@ package com.jogamp.gluegen;
 
 import java.util.*;
 import com.jogamp.gluegen.cgram.types.*;
+import com.jogamp.gluegen.runtime.types.CompoundType;
+import com.jogamp.gluegen.runtime.types.PointerType;
+import com.jogamp.gluegen.runtime.types.Type;
+import com.jogamp.gluegen.runtime.types.TypeVisitor;
 
 public class ReferencedStructs implements TypeVisitor {
 
diff --git a/src/java/com/jogamp/gluegen/SymbolFilter.java b/src/java/com/jogamp/gluegen/SymbolFilter.java
index 4e99caa..724ff40 100644
--- a/src/java/com/jogamp/gluegen/SymbolFilter.java
+++ b/src/java/com/jogamp/gluegen/SymbolFilter.java
@@ -34,6 +34,7 @@
 package com.jogamp.gluegen;
 
 import com.jogamp.gluegen.cgram.types.FunctionSymbol;
+
 import java.util.List;
 
 /** Provides a mechanism by which the GlueEmitter can look at all of
diff --git a/src/java/com/jogamp/gluegen/cgram/HeaderParser.g b/src/java/com/jogamp/gluegen/cgram/HeaderParser.g
index 8c2ad26..6a78e91 100644
--- a/src/java/com/jogamp/gluegen/cgram/HeaderParser.g
+++ b/src/java/com/jogamp/gluegen/cgram/HeaderParser.g
@@ -46,6 +46,7 @@ header {
 
         import antlr.CommonAST;
         import com.jogamp.gluegen.cgram.types.*;
+        import com.jogamp.gluegen.runtime.types.*;
 }
 
 class HeaderParser extends GnuCTreeParser;
@@ -130,7 +131,7 @@ options {
                                                   int cvAttrs) {
         CompoundType t = (CompoundType) structDictionary.get(typeName);
         if (t == null) {
-            t = new CompoundType(null, null, kind, cvAttrs);
+            t = CompoundType.create(null, null, kind, cvAttrs);
             t.setStructName(typeName);
             structDictionary.put(typeName, t);
         }
@@ -297,8 +298,6 @@ options {
     private void handleArrayExpr(TypeBox tb, AST t) {
         if (t != null) {
             try {
-                // FIXME: this doesn't take into account struct alignment, which may be necessary
-                // See also FIXMEs in ArrayType.java
                 int len = parseIntConstExpr(t);
                 tb.setType(canonicalize(new ArrayType(tb.type(), SizeThunk.mul(SizeThunk.constant(len), tb.type().getSize()), len, 0)));
                 return;
@@ -556,7 +555,7 @@ structOrUnionBody[CompoundTypeKind kind, int cvAttrs] returns [CompoundType t] {
                     t = (CompoundType) canonicalize(lookupInStructDictionary(id.getText(), kind, cvAttrs));
                   } ( structDeclarationList[t] )?
                     RCURLY { t.setBodyParsed(); }
-                |   LCURLY { t = new CompoundType(null, null, kind, cvAttrs); }
+                |   LCURLY { t = CompoundType.create(null, null, kind, cvAttrs); }
                     ( structDeclarationList[t] )?
                     RCURLY { t.setBodyParsed(); }
                 | id2:ID { t = (CompoundType) canonicalize(lookupInStructDictionary(id2.getText(), kind, cvAttrs)); }
diff --git a/src/java/com/jogamp/gluegen/cgram/types/CompoundTypeKind.java b/src/java/com/jogamp/gluegen/cgram/types/CompoundTypeKind.java
deleted file mode 100644
index b07611c..0000000
--- a/src/java/com/jogamp/gluegen/cgram/types/CompoundTypeKind.java
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
- * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- * - Redistribution of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- * - Redistribution in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * 
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
- * You acknowledge that this software is not designed or intended for use
- * in the design, construction, operation or maintenance of any nuclear
- * facility.
- * 
- * Sun gratefully acknowledges that this software was originally authored
- * and developed by Kenneth Bradley Russell and Christopher John Kline.
- */
-
-package com.jogamp.gluegen.cgram.types;
-
-/** Type-safe enum for discriminating between structs and unions,
-    which are both represented as compound types. */
-
-public class CompoundTypeKind {
-  public static final CompoundTypeKind STRUCT = new CompoundTypeKind();
-  public static final CompoundTypeKind UNION  = new CompoundTypeKind();
-
-  private CompoundTypeKind() {}
-}
diff --git a/src/java/com/jogamp/gluegen/cgram/types/FunctionSymbol.java b/src/java/com/jogamp/gluegen/cgram/types/FunctionSymbol.java
index 545a6e8..2bfc859 100644
--- a/src/java/com/jogamp/gluegen/cgram/types/FunctionSymbol.java
+++ b/src/java/com/jogamp/gluegen/cgram/types/FunctionSymbol.java
@@ -38,6 +38,9 @@
  */
 package com.jogamp.gluegen.cgram.types;
 
+import com.jogamp.gluegen.runtime.types.FunctionType;
+import com.jogamp.gluegen.runtime.types.Type;
+
 /** Describes a function symbol, which includes the name and
 type. Since we are currently only concerned with processing
 functions this is the only symbol type, though plausibly more
diff --git a/src/java/com/jogamp/gluegen/cgram/types/TypeDictionary.java b/src/java/com/jogamp/gluegen/cgram/types/TypeDictionary.java
index 3bc4d87..2e2caba 100644
--- a/src/java/com/jogamp/gluegen/cgram/types/TypeDictionary.java
+++ b/src/java/com/jogamp/gluegen/cgram/types/TypeDictionary.java
@@ -41,6 +41,8 @@ package com.jogamp.gluegen.cgram.types;
 
 import java.util.*;
 
+import com.jogamp.gluegen.runtime.types.Type;
+
 /** Utility class for recording names of typedefs and structs. */
 
 public class TypeDictionary {
diff --git a/src/java/com/jogamp/gluegen/package.html b/src/java/com/jogamp/gluegen/package.html
index 5e86aad..cc97ad5 100644
--- a/src/java/com/jogamp/gluegen/package.html
+++ b/src/java/com/jogamp/gluegen/package.html
@@ -54,12 +54,12 @@
   </ul>
   
   <h5>Simple alignment arithmetic</h5>
-  <blockquote>remainder = net_size % alignment</blockquote>
+  <blockquote>remainder = offset % alignment</blockquote>
   since alignment is a multiple of 2 <code>-> x % 2n == x & (2n - 1)</code><br>   
-  <blockquote>remainder = net_size & ( alignment - 1 )</blockquote>
+  <blockquote>remainder = offset & ( alignment - 1 )</blockquote>
   <blockquote>
-   padding = alignment - remainder ;<br>
-   aligned_size = net_size + padding ;   
+   padding = (remainder > 0) ? alignment - remainder : 0 ;<br>
+   aligned_offset = offset + padding ;   
   </blockquote>
   
   <h5>Type Size &amp; Alignment for x86, x86_64, armv7l-32bit-eabi and Window(mingw/mingw64)</h5>
diff --git a/src/java/com/jogamp/gluegen/procaddress/ProcAddressCMethodBindingEmitter.java b/src/java/com/jogamp/gluegen/procaddress/ProcAddressCMethodBindingEmitter.java
index fedb1e6..cdc15d0 100755
--- a/src/java/com/jogamp/gluegen/procaddress/ProcAddressCMethodBindingEmitter.java
+++ b/src/java/com/jogamp/gluegen/procaddress/ProcAddressCMethodBindingEmitter.java
@@ -45,6 +45,8 @@ import com.jogamp.gluegen.JavaType;
 import java.io.*;
 import com.jogamp.gluegen.*;
 import com.jogamp.gluegen.cgram.types.*;
+import com.jogamp.gluegen.runtime.types.PointerType;
+import com.jogamp.gluegen.runtime.types.Type;
 
 public class ProcAddressCMethodBindingEmitter extends CMethodBindingEmitter {
 
diff --git a/src/java/com/jogamp/gluegen/procaddress/ProcAddressEmitter.java b/src/java/com/jogamp/gluegen/procaddress/ProcAddressEmitter.java
index c07dab7..6e15f8d 100755
--- a/src/java/com/jogamp/gluegen/procaddress/ProcAddressEmitter.java
+++ b/src/java/com/jogamp/gluegen/procaddress/ProcAddressEmitter.java
@@ -51,6 +51,8 @@ import java.util.*;
 import com.jogamp.gluegen.*;
 import com.jogamp.gluegen.cgram.types.*;
 import com.jogamp.gluegen.runtime.*;
+import com.jogamp.gluegen.runtime.types.FunctionType;
+import com.jogamp.gluegen.runtime.types.Type;
 
 /**
  * A subclass of JavaEmitter that modifies the normal emission of C
diff --git a/src/java/com/jogamp/gluegen/cgram/types/ArrayType.java b/src/java/com/jogamp/gluegen/runtime/types/ArrayType.java
index 675efb5..ace3ff0 100644
--- a/src/java/com/jogamp/gluegen/cgram/types/ArrayType.java
+++ b/src/java/com/jogamp/gluegen/runtime/types/ArrayType.java
@@ -38,14 +38,14 @@
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
-package com.jogamp.gluegen.cgram.types;
+package com.jogamp.gluegen.runtime.types;
 
 /** Represents an array type. This differs from a pointer type in C
     syntax by the use of "[]" rather than "*". The length may or may
     not be known; if the length is unknown then a negative number
     should be passed in to the constructor. */
 
-public class ArrayType extends Type implements Cloneable {
+public class ArrayType extends MemoryLayoutType implements Cloneable {
   private Type elementType;
   private int length;
   private String computedName;
@@ -96,14 +96,12 @@ public class ArrayType extends Type implements Cloneable {
   }
 
   /** Recompute the size of this array if necessary. This needs to be
-      done when the base element type is a compound type. */
-  public void    recomputeSize() {
+      done when the base element type is a compound type after layouting. */
+  void recomputeSize() {
     ArrayType arrayElementType = getElementType().asArray();
     if (arrayElementType != null) {
       arrayElementType.recomputeSize();
     }
-    // FIXME: this doesn't take into account struct alignment, which may be necessary
-    // See also FIXME below and in HeaderParser.g
     super.setSize(SizeThunk.mul(SizeThunk.constant(getLength()), elementType.getSize()));
   }
 
diff --git a/src/java/com/jogamp/gluegen/cgram/types/BitType.java b/src/java/com/jogamp/gluegen/runtime/types/BitType.java
index a7a1f55..78290d8 100644
--- a/src/java/com/jogamp/gluegen/cgram/types/BitType.java
+++ b/src/java/com/jogamp/gluegen/runtime/types/BitType.java
@@ -38,7 +38,7 @@
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
-package com.jogamp.gluegen.cgram.types;
+package com.jogamp.gluegen.runtime.types;
 
 /** Represents a bitfield in a struct. */
 
diff --git a/src/java/com/jogamp/gluegen/cgram/types/CVAttributes.java b/src/java/com/jogamp/gluegen/runtime/types/CVAttributes.java
index 34b703e..f55f817 100644
--- a/src/java/com/jogamp/gluegen/cgram/types/CVAttributes.java
+++ b/src/java/com/jogamp/gluegen/runtime/types/CVAttributes.java
@@ -37,7 +37,7 @@
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
-package com.jogamp.gluegen.cgram.types;
+package com.jogamp.gluegen.runtime.types;
 
 /** Enumeration for const/volatile attributes. These are passed in to
     the constructor of the type. */
diff --git a/src/java/com/jogamp/gluegen/cgram/types/CompoundType.java b/src/java/com/jogamp/gluegen/runtime/types/CompoundType.java
index 9e9ead7..3e93fcf 100644
--- a/src/java/com/jogamp/gluegen/cgram/types/CompoundType.java
+++ b/src/java/com/jogamp/gluegen/runtime/types/CompoundType.java
@@ -38,7 +38,7 @@
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
-package com.jogamp.gluegen.cgram.types;
+package com.jogamp.gluegen.runtime.types;
 
 import java.util.*;
 
@@ -46,8 +46,7 @@ import java.util.*;
     and unions. The boolean type accessors indicate how the type is
     really defined. */
 
-public class CompoundType extends Type implements Cloneable {
-  private CompoundTypeKind kind;
+public abstract class CompoundType extends MemoryLayoutType implements Cloneable {
   // The name "foo" in the construct "struct foo { ... }";
   private String structName;
   private ArrayList<Field> fields;
@@ -56,17 +55,22 @@ public class CompoundType extends Type implements Cloneable {
   private boolean computedHashcode;
   private int     hashcode;
 
-  public CompoundType(String name, SizeThunk size, CompoundTypeKind kind, int cvAttributes) {
-    this(name, size, kind, cvAttributes, null);
-  }
-
-  private CompoundType(String name, SizeThunk size, CompoundTypeKind kind, int cvAttributes, String structName) {
+  CompoundType(String name, SizeThunk size, int cvAttributes, String structName) {
     super(name, size, cvAttributes);
-    assert kind != null;
-    this.kind = kind;
     this.structName = structName;
   }
 
+  public static CompoundType create(String name, SizeThunk size, CompoundTypeKind kind, int cvAttributes) {
+    switch (kind) {
+      case STRUCT:
+          return new StructType(name, size, cvAttributes);
+      case UNION:
+          return new UnionType(name, size, cvAttributes);
+      default:
+          throw new RuntimeException("OO relation "+kind+" / Compount not yet supported");
+    }
+  }
+  
   public Object clone() {
     CompoundType n = (CompoundType) super.clone();
     if(null!=this.fields) {
@@ -103,7 +107,7 @@ public class CompoundType extends Type implements Cloneable {
     return super.equals(arg) &&
         ((structName == null ? t.structName == null : structName.equals(t.structName)) ||
          (structName != null && structName.equals(t.structName))) &&
-        kind == t.kind && listsEqual(fields, t.fields);
+        listsEqual(fields, t.fields);
   }
 
   /** Returns the struct name of this CompoundType, i.e. the "foo" in
@@ -126,6 +130,9 @@ public class CompoundType extends Type implements Cloneable {
   @Override
   public CompoundType asCompound() { return this; }
 
+  ArrayList<Field> getFields() { return fields; }
+  void setFields(ArrayList<Field> fields) { this.fields = fields; }
+  
   /** Returns the number of fields in this type. */
   public int   getNumFields() {
     return ((fields == null) ? 0 : fields.size());
@@ -154,9 +161,9 @@ public class CompoundType extends Type implements Cloneable {
   }
 
   /** Indicates whether this type was declared as a struct. */
-  public boolean isStruct() { return (kind == CompoundTypeKind.STRUCT); }
+  public abstract boolean isStruct();
   /** Indicates whether this type was declared as a union. */
-  public boolean isUnion()  { return (kind == CompoundTypeKind.UNION); }
+  public abstract boolean isUnion();
 
   @Override
   public String toString() {
@@ -212,10 +219,4 @@ public class CompoundType extends Type implements Cloneable {
       visiting = false;
     }
   }
-
-  Type newCVVariant(int cvAttributes) {
-    CompoundType t = new CompoundType(getName(), getSize(), kind, cvAttributes, structName);
-    t.fields = fields;
-    return t;
-  }
 }
diff --git a/src/java/com/jogamp/gluegen/runtime/types/CompoundTypeKind.jav b/src/java/com/jogamp/gluegen/runtime/types/CompoundTypeKind.jav
new file mode 100644
index 0000000..96a07ae
--- /dev/null
+++ b/src/java/com/jogamp/gluegen/runtime/types/CompoundTypeKind.jav
@@ -0,0 +1,41 @@
+/**
+ * Copyright 2011 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ * 
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ * 
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+
+package com.jogamp.gluegen.runtime.types;
+
+/** Type-safe enum for discriminating between structs and unions
+    represented as compound types. Used while syntax parsing. */
+public enum CompoundTypeKind {
+  STRUCT(0), UNION(1);
+  
+  public final int id;
+  
+  CompoundTypeKind(int id){
+        this.id = id;
+  }
+}
diff --git a/src/java/com/jogamp/gluegen/cgram/types/DoubleType.java b/src/java/com/jogamp/gluegen/runtime/types/DoubleType.java
index 280485a..a18e4cc 100644
--- a/src/java/com/jogamp/gluegen/cgram/types/DoubleType.java
+++ b/src/java/com/jogamp/gluegen/runtime/types/DoubleType.java
@@ -37,7 +37,7 @@
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
-package com.jogamp.gluegen.cgram.types;
+package com.jogamp.gluegen.runtime.types;
 
 /** Represents a double-word floating-point type (C type "double".) */
 public class DoubleType extends PrimitiveType implements Cloneable {
diff --git a/src/java/com/jogamp/gluegen/cgram/types/EnumType.java b/src/java/com/jogamp/gluegen/runtime/types/EnumType.java
index 7967ba0..9bff00e 100644
--- a/src/java/com/jogamp/gluegen/cgram/types/EnumType.java
+++ b/src/java/com/jogamp/gluegen/runtime/types/EnumType.java
@@ -37,7 +37,7 @@
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
-package com.jogamp.gluegen.cgram.types;
+package com.jogamp.gluegen.runtime.types;
 
 import java.util.ArrayList;
 import java.util.NoSuchElementException;
diff --git a/src/java/com/jogamp/gluegen/cgram/types/Field.java b/src/java/com/jogamp/gluegen/runtime/types/Field.java
index 891bb27..0613b5f 100644
--- a/src/java/com/jogamp/gluegen/cgram/types/Field.java
+++ b/src/java/com/jogamp/gluegen/runtime/types/Field.java
@@ -37,7 +37,7 @@
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
-package com.jogamp.gluegen.cgram.types;
+package com.jogamp.gluegen.runtime.types;
 
 import com.jogamp.common.os.MachineDescription;
 
diff --git a/src/java/com/jogamp/gluegen/cgram/types/FloatType.java b/src/java/com/jogamp/gluegen/runtime/types/FloatType.java
index 7766b8c..4a10210 100644
--- a/src/java/com/jogamp/gluegen/cgram/types/FloatType.java
+++ b/src/java/com/jogamp/gluegen/runtime/types/FloatType.java
@@ -38,7 +38,7 @@
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
-package com.jogamp.gluegen.cgram.types;
+package com.jogamp.gluegen.runtime.types;
 
 /** Represents a single-word floating-point type (C type "float".) */
 
diff --git a/src/java/com/jogamp/gluegen/cgram/types/FunctionType.java b/src/java/com/jogamp/gluegen/runtime/types/FunctionType.java
index cb430db..bfe0275 100644
--- a/src/java/com/jogamp/gluegen/cgram/types/FunctionType.java
+++ b/src/java/com/jogamp/gluegen/runtime/types/FunctionType.java
@@ -37,7 +37,7 @@
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
-package com.jogamp.gluegen.cgram.types;
+package com.jogamp.gluegen.runtime.types;
 
 import java.util.*;
 
diff --git a/src/java/com/jogamp/gluegen/cgram/types/IntType.java b/src/java/com/jogamp/gluegen/runtime/types/IntType.java
index b85c7fc..02ab530 100644
--- a/src/java/com/jogamp/gluegen/cgram/types/IntType.java
+++ b/src/java/com/jogamp/gluegen/runtime/types/IntType.java
@@ -37,7 +37,7 @@
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
-package com.jogamp.gluegen.cgram.types;
+package com.jogamp.gluegen.runtime.types;
 
 public class IntType extends PrimitiveType implements Cloneable {
 
diff --git a/src/java/com/jogamp/gluegen/runtime/types/MemoryLayoutType.java b/src/java/com/jogamp/gluegen/runtime/types/MemoryLayoutType.java
new file mode 100644
index 0000000..3473d95
--- /dev/null
+++ b/src/java/com/jogamp/gluegen/runtime/types/MemoryLayoutType.java
@@ -0,0 +1,41 @@
+/**
+ * Copyright 2011 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ * 
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ * 
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+package com.jogamp.gluegen.runtime.types;
+
+public abstract class MemoryLayoutType extends Type {
+  private boolean isLayouted;
+
+  protected MemoryLayoutType(String name, SizeThunk size, int cvAttributes) {
+      super(name, size, cvAttributes);
+      isLayouted = false;        
+  }
+
+  public boolean isLayouted() { return isLayouted; }
+  public void setLayouted() { /* FIXME JAU isLayouted = true; */ }
+    
+}
diff --git a/src/java/com/jogamp/gluegen/cgram/types/PointerType.java b/src/java/com/jogamp/gluegen/runtime/types/PointerType.java
index 4666e48..e45b9ff 100644
--- a/src/java/com/jogamp/gluegen/cgram/types/PointerType.java
+++ b/src/java/com/jogamp/gluegen/runtime/types/PointerType.java
@@ -37,7 +37,7 @@
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
-package com.jogamp.gluegen.cgram.types;
+package com.jogamp.gluegen.runtime.types;
 
 public class PointerType extends Type implements Cloneable {
 
diff --git a/src/java/com/jogamp/gluegen/cgram/types/PrimitiveType.java b/src/java/com/jogamp/gluegen/runtime/types/PrimitiveType.java
index 1eea9a4..b2e6fc0 100644
--- a/src/java/com/jogamp/gluegen/cgram/types/PrimitiveType.java
+++ b/src/java/com/jogamp/gluegen/runtime/types/PrimitiveType.java
@@ -37,7 +37,7 @@
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
-package com.jogamp.gluegen.cgram.types;
+package com.jogamp.gluegen.runtime.types;
 
 public abstract class PrimitiveType extends Type implements Cloneable {
 
diff --git a/src/java/com/jogamp/gluegen/cgram/types/SizeThunk.java b/src/java/com/jogamp/gluegen/runtime/types/SizeThunk.java
index d71445d..b9d4eda 100755
--- a/src/java/com/jogamp/gluegen/cgram/types/SizeThunk.java
+++ b/src/java/com/jogamp/gluegen/runtime/types/SizeThunk.java
@@ -38,7 +38,7 @@
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
-package com.jogamp.gluegen.cgram.types;
+package com.jogamp.gluegen.runtime.types;
 
 import com.jogamp.common.os.MachineDescription;
 
@@ -160,21 +160,6 @@ public abstract class SizeThunk implements Cloneable {
       };
   }
 
-  public static SizeThunk sub(final SizeThunk thunk1,
-                              final SizeThunk thunk2) {
-    return new SizeThunk() {
-        public long computeSize(MachineDescription machDesc) {
-          return thunk1.computeSize(machDesc) - thunk2.computeSize(machDesc);
-        }
-        public long computeAlignment(MachineDescription machDesc) {
-          // FIXME
-          final long thunk1A = thunk1.computeAlignment(machDesc); 
-          final long thunk2A = thunk2.computeAlignment(machDesc);
-          return ( thunk1A > thunk2A ) ? thunk1A : thunk2A ;
-        }
-      };
-  }
-
   public static SizeThunk mul(final SizeThunk thunk1,
                               final SizeThunk thunk2) {
     return new SizeThunk() {
@@ -189,36 +174,26 @@ public abstract class SizeThunk implements Cloneable {
       };
   }
 
-  public static SizeThunk mod(final SizeThunk thunk1,
-                              final SizeThunk thunk2) {
-    return new SizeThunk() {
-        public long computeSize(MachineDescription machDesc) {
-          return thunk1.computeSize(machDesc) % thunk2.computeSize(machDesc);
-        }
-        public long computeAlignment(MachineDescription machDesc) {
-          // FIXME
-          final long thunk1A = thunk1.computeAlignment(machDesc); 
-          final long thunk2A = thunk2.computeAlignment(machDesc);
-          return ( thunk1A > thunk2A ) ? thunk1A : thunk2A ;
-        }
-      };
-  }
-
-  public static SizeThunk roundUp(final SizeThunk thunk1,
-                                  final SizeThunk thunk2) {
+  public static SizeThunk align(final SizeThunk offsetThunk,
+                                final SizeThunk alignmentThunk) {
     return new SizeThunk() {
         public long computeSize(MachineDescription machDesc) {
-          final long sz1 = thunk1.computeSize(machDesc);
-          final long sz2 = thunk2.computeSize(machDesc);
-          final long rem = (sz1 % sz2);
-          if (rem == 0) {
-            return sz1;
-          }
-          return sz1 + (sz2 - rem);
+          // x % 2n == x & (2n - 1)
+          // remainder = net_size & ( alignment - 1 )
+          // padding = alignment - remainder ;
+          // aligned_size = net_size + padding ;
+            
+          final long size = offsetThunk.computeSize(machDesc);
+          final long alignment = alignmentThunk.computeAlignment(machDesc);
+          
+          final long remainder = size & ( alignment - 1 ) ;
+          final long padding = (remainder > 0) ? alignment - remainder : 0;
+          return size + padding;
         }
+        
         public long computeAlignment(MachineDescription machDesc) {
-          final long thunk1A = thunk1.computeAlignment(machDesc); 
-          final long thunk2A = thunk2.computeAlignment(machDesc);
+          final long thunk1A = offsetThunk.computeAlignment(machDesc); 
+          final long thunk2A = alignmentThunk.computeAlignment(machDesc);
           return ( thunk1A > thunk2A ) ? thunk1A : thunk2A ;
         }
       };
@@ -244,7 +219,7 @@ public abstract class SizeThunk implements Cloneable {
           return constant;
         }
         public long computeAlignment(MachineDescription machDesc) {
-          return 1; // no real alignment for constants 
+          return 1; // no alignment for constants 
         }        
       };
   }
diff --git a/src/java/com/jogamp/gluegen/StructLayout.java b/src/java/com/jogamp/gluegen/runtime/types/StructLayout.java
index 392e1b1..95b7585 100644
--- a/src/java/com/jogamp/gluegen/StructLayout.java
+++ b/src/java/com/jogamp/gluegen/runtime/types/StructLayout.java
@@ -38,10 +38,7 @@
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
-package com.jogamp.gluegen;
-
-import com.jogamp.common.os.Platform;
-import com.jogamp.gluegen.cgram.types.*;
+package com.jogamp.gluegen.runtime.types;
 
 /** Encapsulates algorithm for laying out data structures. Note that
     this ends up embedding code in various places via SizeThunks. If
@@ -52,15 +49,19 @@ import com.jogamp.gluegen.cgram.types.*;
 
 public class StructLayout {
   private int baseOffset;
-  private int structAlignment;
 
-  protected StructLayout(int baseOffset,
-                         int structAlignment) {
+  protected StructLayout(int baseOffset) {
     this.baseOffset = baseOffset;
-    this.structAlignment = structAlignment;
   }
 
   public void layout(CompoundType t) {
+    /**
+     * - 1) align offset for the new data type, 
+     *      using the new data type alignment.
+     *      Offsets are always upfront.
+     * - 2) add the aligned size of the new data type
+     * - 3) add trailing padding (largest element size)
+     */
     int n = t.getNumFields();
     SizeThunk curOffset = SizeThunk.constant(baseOffset);
     SizeThunk maxSize   = SizeThunk.constant(0);
@@ -68,8 +69,8 @@ public class StructLayout {
       Field f = t.getField(i);
       Type ft = f.getType();
       if (ft.isInt() || ft.isFloat() || ft.isDouble() || ft.isPointer()) {
-        SizeThunk sz = ft.getSize();
-        curOffset = SizeThunk.roundUp(curOffset, sz);
+        final SizeThunk sz = ft.getSize();
+        curOffset = SizeThunk.align(curOffset, sz);
         f.setOffset(curOffset);
         if (t.isUnion()) {
           maxSize = SizeThunk.max(maxSize, sz);
@@ -77,25 +78,34 @@ public class StructLayout {
           curOffset = SizeThunk.add(curOffset, sz);
         }
       } else if (ft.isCompound()) {
-        new StructLayout(0, structAlignment).layout(ft.asCompound());
-        curOffset = SizeThunk.roundUp(curOffset, SizeThunk.constant(structAlignment));
+        final CompoundType ct = ft.asCompound();
+        if(!ct.isLayouted()) {
+            StructLayout.layout(0, ct);
+        }
+        final SizeThunk sz = ct.getSize();
+        curOffset = SizeThunk.align(curOffset, sz);
         f.setOffset(curOffset);
         if (t.isUnion()) {
-          maxSize = SizeThunk.max(maxSize, ft.getSize());
+          maxSize = SizeThunk.max(maxSize, sz);
         } else {
-          curOffset = SizeThunk.add(curOffset, ft.getSize());
+          curOffset = SizeThunk.add(curOffset, sz);
         }
       } else if (ft.isArray()) {
         ArrayType arrayType = ft.asArray();
-        CompoundType compoundElementType = arrayType.getBaseElementType().asCompound();
-        if (compoundElementType != null) {
-          new StructLayout(0, structAlignment).layout(compoundElementType);
-          arrayType.recomputeSize();
+        if(!arrayType.isLayouted()) {
+            CompoundType compoundElementType = arrayType.getBaseElementType().asCompound();
+            if (compoundElementType != null) {
+              if(!compoundElementType.isLayouted()) {
+                  StructLayout.layout(0, compoundElementType);
+              }
+              arrayType.recomputeSize();
+            }
+            arrayType.setLayouted();
         }
-        // Note: not sure how this rounding is done
-        curOffset = SizeThunk.roundUp(curOffset, SizeThunk.constant(structAlignment));
+        final SizeThunk sz = ft.getSize();
+        curOffset = SizeThunk.align(curOffset, sz);
         f.setOffset(curOffset);
-        curOffset = SizeThunk.add(curOffset, ft.getSize());
+        curOffset = SizeThunk.add(curOffset, sz);
       } else {
         // FIXME
         String name = t.getName();
@@ -108,52 +118,21 @@ public class StructLayout {
                                    ") not implemented yet");
       }
     }
-    // FIXME: I think the below is wrong; better check with some examples
-    //    if ((curOffset % structAlignment) != 0) {
-    //      curOffset += structAlignment - (curOffset % structAlignment);
-    //    }
     if (t.isUnion()) {
       t.setSize(maxSize);
     } else {
+      // trailing struct padding ..
+      curOffset = SizeThunk.align(curOffset, curOffset);
       t.setSize(curOffset);
     }
+    t.setLayouted();    
   }
 
-  
-
-  /**
-   * <P>See alignment in {@link com.jogamp.common.os.MachineDescription}.</p>
-   * 
-   * <P>The code is currently used at compile time {@link JavaEmitter#layoutStruct(CompoundType t)} once,
-   * and code for structs is emitted for generic 32bit and 64bit only {@link JavaEmitter#emitStruct(CompoundType structType, String alternateName)}.</p>
-   */
-  public static StructLayout createForCurrentPlatform() {
-    final Platform.OSType osType = Platform.getOSType();
-    final Platform.CPUArch cpuArch = Platform.getCPUArch();
-    
-    if( ( Platform.OSType.WINDOWS == osType && Platform.CPUArch.X86_32 == cpuArch ) || // It appears that Windows uses a packing alignment of 4 bytes in 32-bit mode
-        ( Platform.CPUArch.ARM_32 == cpuArch ) 
-      ) {
-      return new StructLayout(0, 4);
-    } else if ((Platform.OSType.WINDOWS == osType && Platform.CPUArch.X86_64 == cpuArch) ||
-               (Platform.OSType.LINUX == osType   && Platform.CPUArch.X86_32 == cpuArch) ||
-               (Platform.OSType.LINUX == osType   && Platform.CPUArch.X86_64 == cpuArch) ||
-               (Platform.OSType.LINUX == osType   && Platform.CPUArch.IA64 == cpuArch) ||
-               (Platform.OSType.SUNOS == osType   && Platform.CPUArch.SPARC_32 == cpuArch) ||
-               (Platform.OSType.SUNOS == osType   && Platform.CPUArch.SPARCV9_64 == cpuArch) ||
-               (Platform.OSType.SUNOS == osType   && Platform.CPUArch.X86_32 == cpuArch) ||
-               (Platform.OSType.SUNOS == osType   && Platform.CPUArch.X86_64 == cpuArch) ||
-               (Platform.OSType.MACOS == osType   && Platform.CPUArch.PPC == cpuArch) ||
-               (Platform.OSType.MACOS == osType   && Platform.CPUArch.X86_32 == cpuArch) ||
-               (Platform.OSType.MACOS == osType   && Platform.CPUArch.X86_64 == cpuArch) ||
-               (Platform.OSType.FREEBSD == osType && Platform.CPUArch.X86_32 == cpuArch) ||
-               (Platform.OSType.FREEBSD == osType && Platform.CPUArch.X86_64 == cpuArch) ||
-               (Platform.OSType.HPUX == osType    && Platform.CPUArch.PA_RISC2_0 == cpuArch)
-               ) {
-      return new StructLayout(0, 8);
-    } else {
-      // FIXME: add more ports
-      throw new RuntimeException("Please port StructLayout to your OS (" + osType + ") and CPU (" + cpuArch + ")");
-    }
+  public static StructLayout create(int baseOffset) {
+      return new StructLayout(baseOffset);
   }
+
+  public static void layout(int baseOffset, CompoundType t) {
+      create(baseOffset).layout(t);
+  }  
 }
diff --git a/src/java/com/jogamp/gluegen/runtime/types/StructType.java b/src/java/com/jogamp/gluegen/runtime/types/StructType.java
new file mode 100644
index 0000000..2c0a589
--- /dev/null
+++ b/src/java/com/jogamp/gluegen/runtime/types/StructType.java
@@ -0,0 +1,57 @@
+/**
+ * Copyright 2011 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ * 
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ * 
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+package com.jogamp.gluegen.runtime.types;
+
+public class StructType extends CompoundType {
+
+  public StructType(String name, SizeThunk size, int cvAttributes) {
+      this(name, size, cvAttributes, null);
+  }
+  
+  StructType(String name, SizeThunk size, int cvAttributes, String structName) {
+    super (name, size, cvAttributes, structName);
+  }
+
+  @Override
+  public boolean equals(Object arg) {
+    if (arg == null || !(arg instanceof StructType)) {
+      return false;
+    }
+    return super.equals(arg);
+  }
+
+  public final boolean isStruct() { return true; }
+  public final boolean isUnion()  { return false; }
+  
+  Type newCVVariant(int cvAttributes) {
+    StructType t = new StructType(getName(), getSize(), cvAttributes, getStructName());
+    t.setFields(getFields());
+    return t;
+  }
+  
+}
diff --git a/src/java/com/jogamp/gluegen/cgram/types/Type.java b/src/java/com/jogamp/gluegen/runtime/types/Type.java
index 27aff92..ebedfcb 100644
--- a/src/java/com/jogamp/gluegen/cgram/types/Type.java
+++ b/src/java/com/jogamp/gluegen/runtime/types/Type.java
@@ -38,7 +38,7 @@
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
-package com.jogamp.gluegen.cgram.types;
+package com.jogamp.gluegen.runtime.types;
 
 import java.util.List;
 
@@ -269,5 +269,5 @@ public abstract class Type implements Cloneable {
   /** Helper routine for list equality comparison */
   static boolean listsEqual(List a, List b) {
     return ((a == null && b == null) || (a != null && b != null && a.equals(b)));
-  }
+  }  
 }
diff --git a/src/java/com/jogamp/gluegen/cgram/types/TypeVisitor.java b/src/java/com/jogamp/gluegen/runtime/types/TypeVisitor.java
index 0889681..0d7f63d 100644
--- a/src/java/com/jogamp/gluegen/cgram/types/TypeVisitor.java
+++ b/src/java/com/jogamp/gluegen/runtime/types/TypeVisitor.java
@@ -37,7 +37,7 @@
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
-package com.jogamp.gluegen.cgram.types;
+package com.jogamp.gluegen.runtime.types;
 
 public interface TypeVisitor {
   public void visitType(Type t);
diff --git a/src/java/com/jogamp/gluegen/runtime/types/UnionType.java b/src/java/com/jogamp/gluegen/runtime/types/UnionType.java
new file mode 100644
index 0000000..5aee3f1
--- /dev/null
+++ b/src/java/com/jogamp/gluegen/runtime/types/UnionType.java
@@ -0,0 +1,57 @@
+/**
+ * Copyright 2011 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ * 
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ * 
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+package com.jogamp.gluegen.runtime.types;
+
+public class UnionType extends CompoundType {
+
+  public UnionType(String name, SizeThunk size, int cvAttributes) {
+      this(name, size, cvAttributes, null);
+  }
+  
+  UnionType(String name, SizeThunk size, int cvAttributes, String structName) {
+    super (name, size, cvAttributes, structName);
+  }
+    
+  @Override
+  public boolean equals(Object arg) {
+    if (arg == null || !(arg instanceof UnionType)) {
+      return false;
+    }
+    return super.equals(arg);
+  }
+  
+  public final boolean isStruct() { return false; }
+  public final boolean isUnion()  { return true; }
+
+  Type newCVVariant(int cvAttributes) {
+    UnionType t = new UnionType(getName(), getSize(), cvAttributes, getStructName());
+    t.setFields(getFields());
+    return t;
+  }
+  
+}
diff --git a/src/java/com/jogamp/gluegen/cgram/types/VoidType.java b/src/java/com/jogamp/gluegen/runtime/types/VoidType.java
index fa098e7..07b3ec3 100644
--- a/src/java/com/jogamp/gluegen/cgram/types/VoidType.java
+++ b/src/java/com/jogamp/gluegen/runtime/types/VoidType.java
@@ -37,7 +37,7 @@
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
-package com.jogamp.gluegen.cgram.types;
+package com.jogamp.gluegen.runtime.types;
 
 public class VoidType extends Type implements Cloneable {