Merge branch 'master' into stash_glyphcache

Conflicts:
	make/scripts/tests.sh
	src/jogl/classes/com/jogamp/graph/curve/OutlineShape.java
	src/jogl/classes/com/jogamp/graph/curve/Region.java
	src/jogl/classes/com/jogamp/graph/curve/opengl/GLRegion.java
	src/jogl/classes/com/jogamp/graph/curve/opengl/RegionRenderer.java
	src/jogl/classes/com/jogamp/graph/curve/opengl/Renderer.java
	src/jogl/classes/com/jogamp/graph/curve/opengl/TextRenderer.java
	src/jogl/classes/com/jogamp/graph/font/Font.java
	src/jogl/classes/com/jogamp/opengl/math/VectorUtil.java
	src/jogl/classes/jogamp/graph/curve/text/GlyphShape.java
	src/jogl/classes/jogamp/graph/curve/text/GlyphString.java
	src/jogl/classes/jogamp/graph/font/typecast/TypecastFont.java
	src/jogl/classes/jogamp/graph/font/typecast/TypecastGlyph.java
	src/jogl/classes/jogamp/graph/font/typecast/TypecastRenderer.java

8 files changed, 762 insertions, 422 deletions

diff --git a/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderCode.java b/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderCode.java
index f6b686d7e..6a64edeb5 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderCode.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderCode.java
@@ -45,13 +45,16 @@ import java.util.Set;
 
 import javax.media.opengl.GL;
 import javax.media.opengl.GL2ES2;
+import javax.media.opengl.GL3;
 import javax.media.opengl.GLES2;
+import javax.media.opengl.GLContext;
 import javax.media.opengl.GLException;
 
 import jogamp.opengl.Debug;
 
 import com.jogamp.common.nio.Buffers;
 import com.jogamp.common.util.IOUtil;
+import com.jogamp.common.util.VersionNumber;
 
 /**
  * Convenient shader code class to use and instantiate vertex or fragment programs.
@@ -59,33 +62,38 @@ import com.jogamp.common.util.IOUtil;
  * A documented example of how to use this code is available
  * {@link #create(GL2ES2, int, Class, String, String, String, boolean) here} and
  * {@link #create(GL2ES2, int, int, Class, String, String[], String, String) here}.
- * </p>  
+ * </p>
  */
 public class ShaderCode {
-    public static final boolean DEBUG = Debug.debug("GLSLCode");
     public static final boolean DEBUG_CODE = Debug.isPropertyDefined("jogl.debug.GLSLCode", true);
 
     /** Unique resource suffix for {@link GL2ES2#GL_VERTEX_SHADER} in source code: <code>vp</code> */
     public static final String SUFFIX_VERTEX_SOURCE   =  "vp" ;
-    
+
     /** Unique resource suffix for {@link GL2ES2#GL_VERTEX_SHADER} in binary: <code>bvp</code> */
     public static final String SUFFIX_VERTEX_BINARY   = "bvp" ;
-    
+
+    /** Unique resource suffix for {@link GL3#GL_GEOMETRY_SHADER} in source code: <code>gp</code> */
+    public static final String SUFFIX_GEOMETRY_SOURCE =  "gp" ;
+
+    /** Unique resource suffix for {@link GL3#GL_GEOMETRY_SHADER} in binary: <code>bgp</code> */
+    public static final String SUFFIX_GEOMETRY_BINARY = "bgp" ;
+
     /** Unique resource suffix for {@link GL2ES2#GL_FRAGMENT_SHADER} in source code: <code>fp</code> */
     public static final String SUFFIX_FRAGMENT_SOURCE =  "fp" ;
-    
+
     /** Unique resource suffix for {@link GL2ES2#GL_FRAGMENT_SHADER} in binary: <code>bfp</code> */
     public static final String SUFFIX_FRAGMENT_BINARY = "bfp" ;
-    
+
     /** Unique relative path for binary shader resources for {@link GLES2#GL_NVIDIA_PLATFORM_BINARY_NV NVIDIA}: <code>nvidia</code> */
     public static final String SUB_PATH_NVIDIA = "nvidia" ;
 
     /**
-     * @param type either {@link GL2ES2#GL_VERTEX_SHADER} or {@link GL2ES2#GL_FRAGMENT_SHADER}
+     * @param type either {@link GL2ES2#GL_VERTEX_SHADER}, {@link GL2ES2#GL_FRAGMENT_SHADER} or {@link GL3#GL_GEOMETRY_SHADER}
      * @param count number of shaders
      * @param source CharSequence array containing the shader sources, organized as <code>source[count][strings-per-shader]</code>.
      *               May be either an immutable <code>String</code> - or mutable <code>StringBuilder</code> array.
-     * 
+     *
      * @throws IllegalArgumentException if <code>count</count> and <code>source.length</code> do not match
      */
     public ShaderCode(int type, int count, CharSequence[][] source) {
@@ -95,6 +103,7 @@ public class ShaderCode {
         switch (type) {
             case GL2ES2.GL_VERTEX_SHADER:
             case GL2ES2.GL_FRAGMENT_SHADER:
+            case GL3.GL_GEOMETRY_SHADER:
                 break;
             default:
                 throw new GLException("Unknown shader type: "+type);
@@ -113,14 +122,15 @@ public class ShaderCode {
     }
 
     /**
-     * @param type either {@link GL2ES2#GL_VERTEX_SHADER} or {@link GL2ES2#GL_FRAGMENT_SHADER}
+     * @param type either {@link GL2ES2#GL_VERTEX_SHADER}, {@link GL2ES2#GL_FRAGMENT_SHADER} or {@link GL3#GL_GEOMETRY_SHADER}
      * @param count number of shaders
-     * @param binary binary buffer containing the shader binaries, 
+     * @param binary binary buffer containing the shader binaries,
      */
     public ShaderCode(int type, int count, int binFormat, Buffer binary) {
         switch (type) {
             case GL2ES2.GL_VERTEX_SHADER:
             case GL2ES2.GL_FRAGMENT_SHADER:
+            case GL3.GL_GEOMETRY_SHADER:
                 break;
             default:
                 throw new GLException("Unknown shader type: "+type);
@@ -136,19 +146,19 @@ public class ShaderCode {
     /**
      * Creates a complete {@link ShaderCode} object while reading all shader source of <code>sourceFiles</code>,
      * which location is resolved using the <code>context</code> class, see {@link #readShaderSource(Class, String)}.
-     * 
+     *
      * @param gl current GL object to determine whether a shader compiler is available. If null, no validation is performed.
-     * @param type either {@link GL2ES2#GL_VERTEX_SHADER} or {@link GL2ES2#GL_FRAGMENT_SHADER}
+     * @param type either {@link GL2ES2#GL_VERTEX_SHADER}, {@link GL2ES2#GL_FRAGMENT_SHADER} or {@link GL3#GL_GEOMETRY_SHADER}
      * @param count number of shaders
      * @param context class used to help resolving the source location
      * @param sourceFiles array of source locations, organized as <code>sourceFiles[count]</code>
      * @param mutableStringBuilder if <code>true</code> method returns a mutable <code>StringBuilder</code> instance
-     *                        which can be edited later on at the costs of a String conversion when passing to 
+     *                        which can be edited later on at the costs of a String conversion when passing to
      *                        {@link GL2ES2#glShaderSource(int, int, String[], IntBuffer)}.
      *                        If <code>false</code> method returns an immutable <code>String</code> instance,
      *                        which can be passed to {@link GL2ES2#glShaderSource(int, int, String[], IntBuffer)}
      *                        at no additional costs.
-     * 
+     *
      * @throws IllegalArgumentException if <code>count</count> and <code>sourceFiles.length</code> do not match
      * @see #readShaderSource(Class, String)
      */
@@ -181,16 +191,16 @@ public class ShaderCode {
     /**
      * Creates a complete {@link ShaderCode} object while reading the shader binary of <code>binaryFile</code>,
      * which location is resolved using the <code>context</code> class, see {@link #readShaderBinary(Class, String)}.
-     * 
-     * @param type either {@link GL2ES2#GL_VERTEX_SHADER} or {@link GL2ES2#GL_FRAGMENT_SHADER}
+     *
+     * @param type either {@link GL2ES2#GL_VERTEX_SHADER}, {@link GL2ES2#GL_FRAGMENT_SHADER} or {@link GL3#GL_GEOMETRY_SHADER}
      * @param count number of shaders
      * @param context class used to help resolving the source location
      * @param binFormat a valid native binary format as they can be queried by {@link ShaderUtil#getShaderBinaryFormats(GL)}.
      * @param sourceFiles array of source locations, organized as <code>sourceFiles[count]</code>
-     * 
+     *
      * @see #readShaderBinary(Class, String)
      * @see ShaderUtil#getShaderBinaryFormats(GL)
-     */    
+     */
     public static ShaderCode create(int type, int count, Class<?> context, int binFormat, String binaryFile) {
         ByteBuffer shaderBinary = null;
         if(null!=binaryFile && 0<=binFormat) {
@@ -214,16 +224,18 @@ public class ShaderCode {
      * <ul>
      *   <li>Source<ul>
      *     <li>{@link GL2ES2#GL_VERTEX_SHADER vertex}: {@link #SUFFIX_VERTEX_SOURCE}</li>
-     *     <li>{@link GL2ES2#GL_FRAGMENT_SHADER fragment}: {@link #SUFFIX_FRAGMENT_SOURCE}</li></ul></li>
+     *     <li>{@link GL2ES2#GL_FRAGMENT_SHADER fragment}: {@link #SUFFIX_FRAGMENT_SOURCE}</li>
+     *     <li>{@link GL3#GL_GEOMETRY_SHADER geometry}: {@link #SUFFIX_GEOMETRY_SOURCE}</li></ul></li>
      *   <li>Binary<ul>
      *     <li>{@link GL2ES2#GL_VERTEX_SHADER vertex}: {@link #SUFFIX_VERTEX_BINARY}</li>
-     *     <li>{@link GL2ES2#GL_FRAGMENT_SHADER fragment}: {@link #SUFFIX_FRAGMENT_BINARY}</li></ul></li>
-     * </ul> 
-     * @param binary true for a binary resource, false for a source resource 
-     * @param type either {@link GL2ES2#GL_VERTEX_SHADER} or {@link GL2ES2#GL_FRAGMENT_SHADER}
-     * 
+     *     <li>{@link GL2ES2#GL_FRAGMENT_SHADER fragment}: {@link #SUFFIX_FRAGMENT_BINARY}</li>
+     *     <li>{@link GL3#GL_GEOMETRY_SHADER geometry}: {@link #SUFFIX_GEOMETRY_BINARY}</li></ul></li>
+     * </ul>
+     * @param binary true for a binary resource, false for a source resource
+     * @param type either {@link GL2ES2#GL_VERTEX_SHADER}, {@link GL2ES2#GL_FRAGMENT_SHADER} or {@link GL3#GL_GEOMETRY_SHADER}
+     *
      * @throws GLException if <code>type</code> is not supported
-     * 
+     *
      * @see #create(GL2ES2, int, Class, String, String, String, boolean)
      */
     public static String getFileSuffix(boolean binary, int type) {
@@ -232,21 +244,23 @@ public class ShaderCode {
                 return binary?SUFFIX_VERTEX_BINARY:SUFFIX_VERTEX_SOURCE;
             case GL2ES2.GL_FRAGMENT_SHADER:
                 return binary?SUFFIX_FRAGMENT_BINARY:SUFFIX_FRAGMENT_SOURCE;
+            case GL3.GL_GEOMETRY_SHADER:
+                return binary?SUFFIX_GEOMETRY_BINARY:SUFFIX_GEOMETRY_SOURCE;
             default:
                 throw new GLException("illegal shader type: "+type);
         }
     }
 
-    /** 
+    /**
      * Returns a unique relative path for binary shader resources as follows:
      * <ul>
      *   <li>{@link GLES2#GL_NVIDIA_PLATFORM_BINARY_NV NVIDIA}: {@link #SUB_PATH_NVIDIA}</li>
      * </ul>
-     * 
+     *
      * @throws GLException if <code>binFormat</code> is not supported
-     * 
+     *
      * @see #create(GL2ES2, int, Class, String, String, String, boolean)
-     */    
+     */
     public static String getBinarySubPath(int binFormat) {
         switch (binFormat) {
             case GLES2.GL_NVIDIA_PLATFORM_BINARY_NV:
@@ -257,42 +271,42 @@ public class ShaderCode {
     }
 
     /**
-     * Convenient creation method for instantiating a complete {@link ShaderCode} object 
-     * either from source code using {@link #create(GL2ES2, int, int, Class, String[])}, 
+     * Convenient creation method for instantiating a complete {@link ShaderCode} object
+     * either from source code using {@link #create(GL2ES2, int, int, Class, String[])},
      * or from a binary code using {@link #create(int, int, Class, int, String)},
      * whatever is available first.
      * <p>
-     * The source and binary location names are expected w/o suffixes which are 
+     * The source and binary location names are expected w/o suffixes which are
      * resolved and appended using {@link #getFileSuffix(boolean, int)}.
      * </p>
      * <p>
      * Additionally, the binary resource is expected within a subfolder of <code>binRoot</code>
      * which reflects the vendor specific binary format, see {@link #getBinarySubPath(int)}.
      * All {@link ShaderUtil#getShaderBinaryFormats(GL)} are being iterated
-     * using the binary subfolder, the first existing resource is being used. 
+     * using the binary subfolder, the first existing resource is being used.
      * </p>
-     * 
+     *
      * Example:
      * <pre>
      *   Your std JVM layout (plain or within a JAR):
-     *   
+     *
      *      org/test/glsl/MyShaderTest.class
      *      org/test/glsl/shader/vertex.vp
      *      org/test/glsl/shader/fragment.fp
      *      org/test/glsl/shader/bin/nvidia/vertex.bvp
      *      org/test/glsl/shader/bin/nvidia/fragment.bfp
-     *      
+     *
      *   Your Android APK layout:
-     *   
+     *
      *      classes.dex
      *      assets/org/test/glsl/shader/vertex.vp
      *      assets/org/test/glsl/shader/fragment.fp
      *      assets/org/test/glsl/shader/bin/nvidia/vertex.bvp
      *      assets/org/test/glsl/shader/bin/nvidia/fragment.bfp
      *      ...
-     *   
+     *
      *   Your invocation in org/test/glsl/MyShaderTest.java:
-     *   
+     *
      *      ShaderCode vp0 = ShaderCode.create(gl, GL2ES2.GL_VERTEX_SHADER, 1, this.getClass(),
      *                                         "shader", new String[] { "vertex" }, "shader/bin", "vertex");
      *      ShaderCode fp0 = ShaderCode.create(gl, GL2ES2.GL_FRAGMENT_SHADER, 1, this.getClass(),
@@ -303,14 +317,14 @@ public class ShaderCode {
      *      st.attachShaderProgram(gl, sp0, true);
      * </pre>
      * A simplified entry point is {@link #create(GL2ES2, int, Class, String, String, String, boolean)}.
-     * 
+     *
      * <p>
      * The location is finally being resolved using the <code>context</code> class, see {@link #readShaderBinary(Class, String)}.
      * </p>
-     * 
+     *
      * @param gl current GL object to determine whether a shader compiler is available (if <code>source</code> is used),
      *           or to determine the shader binary format (if <code>binary</code> is used).
-     * @param type either {@link GL2ES2#GL_VERTEX_SHADER} or {@link GL2ES2#GL_FRAGMENT_SHADER}
+     * @param type either {@link GL2ES2#GL_VERTEX_SHADER}, {@link GL2ES2#GL_FRAGMENT_SHADER} or {@link GL3#GL_GEOMETRY_SHADER}
      * @param count number of shaders
      * @param context class used to help resolving the source and binary location
      * @param srcRoot relative <i>root</i> path for <code>srcBasenames</code>
@@ -318,22 +332,22 @@ public class ShaderCode {
      * @param binRoot relative <i>root</i> path for <code>binBasenames</code>
      * @param binBasename basename w/o path or suffix relative to <code>binRoot</code> for the shader's binary code
      * @param mutableStringBuilder if <code>true</code> method returns a mutable <code>StringBuilder</code> instance
-     *                        which can be edited later on at the costs of a String conversion when passing to 
+     *                        which can be edited later on at the costs of a String conversion when passing to
      *                        {@link GL2ES2#glShaderSource(int, int, String[], IntBuffer)}.
      *                        If <code>false</code> method returns an immutable <code>String</code> instance,
      *                        which can be passed to {@link GL2ES2#glShaderSource(int, int, String[], IntBuffer)}
      *                        at no additional costs.
-     * 
+     *
      * @throws IllegalArgumentException if <code>count</count> and <code>srcBasenames.length</code> do not match
-     * 
+     *
      * @see #create(GL2ES2, int, int, Class, String[])
      * @see #create(int, int, Class, int, String)
      * @see #readShaderSource(Class, String)
      * @see #getFileSuffix(boolean, int)
      * @see ShaderUtil#getShaderBinaryFormats(GL)
      * @see #getBinarySubPath(int)
-     */    
-    public static ShaderCode create(GL2ES2 gl, int type, int count, Class<?> context, 
+     */
+    public static ShaderCode create(GL2ES2 gl, int type, int count, Class<?> context,
                                     String srcRoot, String[] srcBasenames, String binRoot, String binBasename,
                                     boolean mutableStringBuilder) {
         ShaderCode res = null;
@@ -376,28 +390,28 @@ public class ShaderCode {
     /**
      * Simplified variation of {@link #create(GL2ES2, int, int, Class, String, String[], String, String)}.
      * <br>
-     * 
+     *
      * Example:
      * <pre>
      *   Your std JVM layout (plain or within a JAR):
-     *   
+     *
      *      org/test/glsl/MyShaderTest.class
      *      org/test/glsl/shader/vertex.vp
      *      org/test/glsl/shader/fragment.fp
      *      org/test/glsl/shader/bin/nvidia/vertex.bvp
      *      org/test/glsl/shader/bin/nvidia/fragment.bfp
-     *      
+     *
      *   Your Android APK layout:
-     *   
+     *
      *      classes.dex
      *      assets/org/test/glsl/shader/vertex.vp
      *      assets/org/test/glsl/shader/fragment.fp
      *      assets/org/test/glsl/shader/bin/nvidia/vertex.bvp
      *      assets/org/test/glsl/shader/bin/nvidia/fragment.bfp
      *      ...
-     *   
+     *
      *   Your invocation in org/test/glsl/MyShaderTest.java:
-     *   
+     *
      *      ShaderCode vp0 = ShaderCode.create(gl, GL2ES2.GL_VERTEX_SHADER, this.getClass(),
      *                                         "shader", "shader/bin", "vertex");
      *      ShaderCode fp0 = ShaderCode.create(gl, GL2ES2.GL_FRAGMENT_SHADER, this.getClass(),
@@ -407,10 +421,10 @@ public class ShaderCode {
      *      sp0.add(gl, fp0, System.err);
      *      st.attachShaderProgram(gl, sp0, true);
      * </pre>
-     * 
+     *
      * @param gl current GL object to determine whether a shader compiler is available (if <code>source</code> is used),
      *           or to determine the shader binary format (if <code>binary</code> is used).
-     * @param type either {@link GL2ES2#GL_VERTEX_SHADER} or {@link GL2ES2#GL_FRAGMENT_SHADER}
+     * @param type either {@link GL2ES2#GL_VERTEX_SHADER}, {@link GL2ES2#GL_FRAGMENT_SHADER} or {@link GL3#GL_GEOMETRY_SHADER}
      * @param context class used to help resolving the source and binary location
      * @param srcRoot relative <i>root</i> path for <code>basename</code>
      * @param binRoot relative <i>root</i> path for <code>basename</code>
@@ -418,20 +432,20 @@ public class ShaderCode {
      * @param basenames basename w/o path or suffix relative to <code>srcRoot</code> and <code>binRoot</code>
      *                  for the shader's source and binary code.
      * @param mutableStringBuilder if <code>true</code> method returns a mutable <code>StringBuilder</code> instance
-     *                        which can be edited later on at the costs of a String conversion when passing to 
+     *                        which can be edited later on at the costs of a String conversion when passing to
      *                        {@link GL2ES2#glShaderSource(int, int, String[], IntBuffer)}.
      *                        If <code>false</code> method returns an immutable <code>String</code> instance,
      *                        which can be passed to {@link GL2ES2#glShaderSource(int, int, String[], IntBuffer)}
      *                        at no additional costs.
      * @throws IllegalArgumentException if <code>count</count> is not 1
-     * 
+     *
      * @see #create(GL2ES2, int, int, Class, String, String[], String, String)
-     */    
-    public static ShaderCode create(GL2ES2 gl, int type, Class<?> context, 
+     */
+    public static ShaderCode create(GL2ES2 gl, int type, Class<?> context,
                                     String srcRoot, String binRoot, String basename, boolean mutableStringBuilder) {
-        return create(gl, type, 1, context, srcRoot, new String[] { basename }, binRoot, basename, mutableStringBuilder );        
+        return create(gl, type, 1, context, srcRoot, new String[] { basename }, binRoot, basename, mutableStringBuilder );
     }
-    
+
     /**
      * returns the uniq shader id as an integer
      */
@@ -440,12 +454,14 @@ public class ShaderCode {
     public int        shaderType() { return shaderType; }
     public String     shaderTypeStr() { return shaderTypeStr(shaderType); }
 
-    public static String shaderTypeStr(int type) { 
+    public static String shaderTypeStr(int type) {
         switch (type) {
             case GL2ES2.GL_VERTEX_SHADER:
                 return "VERTEX_SHADER";
             case GL2ES2.GL_FRAGMENT_SHADER:
                 return "FRAGMENT_SHADER";
+            case GL3.GL_GEOMETRY_SHADER:
+                return "GEOMETRY_SHADER";
         }
         return "UNKNOWN_SHADER";
     }
@@ -467,6 +483,7 @@ public class ShaderCode {
         // Create & Compile the vertex/fragment shader objects
         if(null!=shaderSource) {
             if(DEBUG_CODE) {
+                System.err.println("ShaderCode.compile:");
                 dumpShaderSource(System.err);
             }
             valid=ShaderUtil.createAndCompileShader(gl, shader, shaderType,
@@ -497,6 +514,7 @@ public class ShaderCode {
         id=-1;
     }
 
+    @Override
     public boolean equals(Object obj) {
         if(this==obj) { return true; }
         if(obj instanceof ShaderCode) {
@@ -504,9 +522,11 @@ public class ShaderCode {
         }
         return false;
     }
+    @Override
     public int hashCode() {
         return id;
     }
+    @Override
     public String toString() {
         StringBuilder buf = new StringBuilder("ShaderCode[id="+id+", type="+shaderTypeStr()+", valid="+valid+", shader: ");
         for(int i=0; i<shader.remaining(); i++) {
@@ -536,7 +556,7 @@ public class ShaderCode {
             } else {
                 CharSequence[] src = shaderSource[i];
                 int lineno=0;
-                
+
                 for(int j=0; j<src.length; j++) {
                     out.printf("%4d: // Segment %d/%d: \n", lineno, j, src.length);
                     final BufferedReader reader = new BufferedReader(new StringReader(src[j].toString()));
@@ -552,19 +572,19 @@ public class ShaderCode {
             out.println("--------------------------------------------------------------");
         }
     }
-    
+
     /**
      * Adds <code>data</code> after the line containing <code>tag</code>.
      * <p>
      * Note: The shader source to be edit must be created using a mutable StringBuilder.
      * </p>
-     *  
+     *
      * @param shaderIdx the shader index to be used.
      * @param tag search string
      * @param fromIndex start search <code>tag</code> begininig with this index
      * @param data the text to be inserted. Shall end with an EOL '\n' character.
      * @return index after the inserted <code>data</code>
-     * 
+     *
      * @throws IllegalStateException if the shader source's CharSequence is immutable, i.e. not of type <code>StringBuilder</code>
      */
     public int insertShaderSource(int shaderIdx, String tag, int fromIndex, CharSequence data) {
@@ -578,7 +598,7 @@ public class ShaderCode {
         final int sourceCount = (null!=shaderSource)?shaderSource.length:0;
         if(shaderIdx>=sourceCount) {
             throw new IndexOutOfBoundsException("shaderIdx not within source bounds [0.."+(sourceCount-1)+"]: "+shaderIdx);
-        }        
+        }
         final CharSequence[] src = shaderSource[shaderIdx];
         int curEndIndex = 0;
         for(int j=0; j<src.length; j++) {
@@ -586,8 +606,8 @@ public class ShaderCode {
                 throw new IllegalStateException("shader source not a mutable StringBuilder, but CharSequence of type: "+src[j].getClass().getName());
             }
             final StringBuilder sb = (StringBuilder)src[j];
-            curEndIndex += sb.length(); 
-            if(fromIndex < curEndIndex) { 
+            curEndIndex += sb.length();
+            if(fromIndex < curEndIndex) {
                 int insertIdx = sb.indexOf(tag, fromIndex);
                 if(0<=insertIdx) {
                     insertIdx += tag.length();
@@ -613,15 +633,15 @@ public class ShaderCode {
      * Replaces <code>oldName</code> with <code>newName</code> in all shader sources.
      * <p>
      * In case <code>oldName</code> and <code>newName</code> are equal, no action is performed.
-     * </p> 
+     * </p>
      * <p>
      * Note: The shader source to be edit must be created using a mutable StringBuilder.
      * </p>
-     *  
+     *
      * @param oldName the to be replace string
      * @param newName the replacement string
      * @return the number of replacements
-     * 
+     *
      * @throws IllegalStateException if the shader source's CharSequence is immutable, i.e. not of type <code>StringBuilder</code>
      */
     public int replaceInShaderSource(String oldName, String newName) {
@@ -658,18 +678,18 @@ public class ShaderCode {
         }
         return num;
     }
-    
+
     /**
      * Adds <code>data</code> at <code>offset</code> in shader source for shader <code>shaderIdx</code>.
      * <p>
      * Note: The shader source to be edit must be created using a mutable StringBuilder.
      * </p>
-     *  
+     *
      * @param shaderIdx the shader index to be used.
      * @param position in shader source segments of shader <code>shaderIdx</code>
-     * @param data the text to be inserted. Shall end with an EOL '\n' character.
+     * @param data the text to be inserted. Shall end with an EOL '\n' character
      * @return index after the inserted <code>data</code>
-     * 
+     *
      * @throws IllegalStateException if the shader source's CharSequence is immutable, i.e. not of type <code>StringBuilder</code>
      */
     public int insertShaderSource(int shaderIdx, int position, CharSequence data) {
@@ -683,7 +703,7 @@ public class ShaderCode {
         final int sourceCount = (null!=shaderSource)?shaderSource.length:0;
         if(shaderIdx>=sourceCount) {
             throw new IndexOutOfBoundsException("shaderIdx not within source bounds [0.."+(sourceCount-1)+"]: "+shaderIdx);
-        }        
+        }
         final CharSequence[] src = shaderSource[shaderIdx];
         int curEndIndex = 0;
         for(int j=0; j<src.length; j++) {
@@ -691,8 +711,8 @@ public class ShaderCode {
                 throw new IllegalStateException("shader source not a mutable StringBuilder, but CharSequence of type: "+src[j].getClass().getName());
             }
             final StringBuilder sb = (StringBuilder)src[j];
-            curEndIndex += sb.length(); 
-            if(position < curEndIndex) { 
+            curEndIndex += sb.length();
+            if(position < curEndIndex) {
                 sb.insert(position, data);
                 return position+data.length();
             }
@@ -700,6 +720,7 @@ public class ShaderCode {
         return -1;
     }
 
+    @SuppressWarnings("resource")
     private static int readShaderSource(Class<?> context, URLConnection conn, StringBuilder result, int lineno) throws IOException  {
         if(DEBUG_CODE) {
             if(0 == lineno) {
@@ -716,12 +737,12 @@ public class ShaderCode {
                 if (line.startsWith("#include ")) {
                     String includeFile = line.substring(9).trim();
                     URLConnection nextConn = null;
-                    
+
                     // Try relative of current shader location
                     nextConn = IOUtil.openURL(IOUtil.getRelativeOf(conn.getURL(), includeFile), "ShaderCode.relativeOf ");
                     if (nextConn == null) {
                         // Try relative of class and absolute
-                        nextConn = IOUtil.getResource(context, includeFile);        
+                        nextConn = IOUtil.getResource(context, includeFile);
                     }
                     if (nextConn == null) {
                         // Fail
@@ -739,7 +760,7 @@ public class ShaderCode {
     }
 
     /**
-     * 
+     *
      * @param context
      * @param conn
      * @param result
@@ -748,7 +769,7 @@ public class ShaderCode {
     public static void readShaderSource(Class<?> context, URLConnection conn, StringBuilder result) throws IOException {
         readShaderSource(context, conn, result, 0);
     }
-    
+
     /**
      * Reads shader source located in <code>path</code>,
      * either relative to the <code>context</code> class or absolute <i>as-is</i>.
@@ -756,21 +777,21 @@ public class ShaderCode {
      * Final location lookup is performed via {@link ClassLoader#getResource(String)} and {@link ClassLoader#getSystemResource(String)},
      * see {@link IOUtil#getResource(Class, String)}.
      * </p>
-     *  
+     *
      * @param context class used to help resolve the source location
      * @param path location of shader source
      * @param mutableStringBuilder if <code>true</code> method returns a mutable <code>StringBuilder</code> instance
-     *                        which can be edited later on at the costs of a String conversion when passing to 
+     *                        which can be edited later on at the costs of a String conversion when passing to
      *                        {@link GL2ES2#glShaderSource(int, int, String[], IntBuffer)}.
      *                        If <code>false</code> method returns an immutable <code>String</code> instance,
      *                        which can be passed to {@link GL2ES2#glShaderSource(int, int, String[], IntBuffer)}
      *                        at no additional costs.
-     * @throws IOException 
-     * 
+     * @throws IOException
+     *
      * @see IOUtil#getResource(Class, String)
-     */    
+     */
     public static CharSequence readShaderSource(Class<?> context, String path, boolean mutableStringBuilder) throws IOException {
-        URLConnection conn = IOUtil.getResource(context, path);        
+        URLConnection conn = IOUtil.getResource(context, path);
         if (conn == null) {
             return null;
         }
@@ -780,17 +801,17 @@ public class ShaderCode {
     }
 
     /**
-     * Reads shader binary located in <code>path</code>, 
+     * Reads shader binary located in <code>path</code>,
      * either relative to the <code>context</code> class or absolute <i>as-is</i>.
      * <p>
      * Final location lookup is perfomed via {@link ClassLoader#getResource(String)} and {@link ClassLoader#getSystemResource(String)},
      * see {@link IOUtil#getResource(Class, String)}.
      * </p>
-     *  
+     *
      * @param context class used to help resolve the source location
      * @param path location of shader binary
-     * @throws IOException 
-     * 
+     * @throws IOException
+     *
      * @see IOUtil#getResource(Class, String)
      */
     public static ByteBuffer readShaderBinary(Class<?> context, String path) throws IOException {
@@ -806,6 +827,186 @@ public class ShaderCode {
         }
     }
 
+    // Shall we use: #ifdef GL_FRAGMENT_PRECISION_HIGH .. #endif for using highp in fragment shader if avail ?
+    /** Default precision of {@link GL#isGLES2() ES2} for {@link GL2ES2#GL_VERTEX_SHADER vertex-shader}: {@value #es2_default_precision_vp} */
+    public static final String es2_default_precision_vp = "\nprecision highp float;\nprecision highp int;\n/*precision lowp sampler2D;*/\n/*precision lowp samplerCube;*/\n";
+    /** Default precision of {@link GL#isGLES2() ES2} for {@link GL2ES2#GL_FRAGMENT_SHADER fragment-shader}: {@value #es2_default_precision_fp} */
+    public static final String es2_default_precision_fp = "\nprecision mediump float;\nprecision mediump int;\n/*precision lowp sampler2D;*/\n/*precision lowp samplerCube;*/\n";
+
+    /** Default precision of {@link GL#isGLES3() ES3} for {@link GL2ES2#GL_VERTEX_SHADER vertex-shader}: {@value #es3_default_precision_vp} */
+    public static final String es3_default_precision_vp = es2_default_precision_vp;
+    /** Default precision of {@link GL#isGLES3() ES3} for {@link GL2ES2#GL_FRAGMENT_SHADER fragment-shader}: {@value #es3_default_precision_fp} */
+    public static final String es3_default_precision_fp = es2_default_precision_fp;
+
+    /** Default precision of GLSL &ge; 1.30 as required until &lt; 1.50 for {@link GL2ES2#GL_VERTEX_SHADER vertex-shader} or {@link GL3#GL_GEOMETRY_SHADER geometry-shader}: {@value #gl3_default_precision_vp_gp}. See GLSL Spec 1.30-1.50 Section 4.5.3. */
+    public static final String gl3_default_precision_vp_gp = "\nprecision highp float;\nprecision highp int;\n";
+    /** Default precision of GLSL &ge; 1.30 as required until &lt; 1.50 for {@link GL2ES2#GL_FRAGMENT_SHADER fragment-shader}: {@value #gl3_default_precision_fp}. See GLSL Spec 1.30-1.50 Section 4.5.3. */
+    public static final String gl3_default_precision_fp = "\nprecision highp float;\nprecision mediump int;\n/*precision mediump sampler2D;*/\n";
+
+    /** <i>Behavior</i> for GLSL extension directive, see {@link #createExtensionDirective(String, String)}, value {@value}. */
+    public static final String REQUIRE = "require";
+    /** <i>Behavior</i> for GLSL extension directive, see {@link #createExtensionDirective(String, String)}, value {@value}. */
+    public static final String ENABLE = "enable";
+    /** <i>Behavior</i> for GLSL extension directive, see {@link #createExtensionDirective(String, String)}, value {@value}. */
+    public static final String DISABLE = "disable";
+    /** <i>Behavior</i> for GLSL extension directive, see {@link #createExtensionDirective(String, String)}, value {@value}. */
+    public static final String WARN = "warn";
+
+    /**
+     * Creates a GLSL extension directive.
+     * <p>
+     * Prefer {@link #ENABLE} over {@link #REQUIRE}, since the latter will force a failure if not supported.
+     * </p>
+     *
+     * @param extensionName
+     * @param behavior shall be either {@link #REQUIRE}, {@link #ENABLE}, {@link #DISABLE} or {@link #WARN}
+     * @return the complete extension directive
+     */
+    public static String createExtensionDirective(String extensionName, String behavior) {
+        return "#extension " + extensionName + " : " + behavior;
+    }
+
+    /**
+     * Add GLSL version at the head of this shader source code.
+     * <p>
+     * Note: The shader source to be edit must be created using a mutable StringBuilder.
+     * </p>
+     * @param gl a GL context, which must have been made current once
+     * @return the index after the inserted data, maybe 0 if nothing has be inserted.
+     */
+    public final int addGLSLVersion(GL2ES2 gl) {
+        return insertShaderSource(0, 0, gl.getContext().getGLSLVersionString());
+    }
+
+    /**
+     * Adds default precision to source code at given position if required, i.e.
+     * {@link #es2_default_precision_vp}, {@link #es2_default_precision_fp},
+     * {@link #gl3_default_precision_vp_gp}, {@link #gl3_default_precision_fp} or none,
+     * depending on the {@link GLContext#getGLSLVersionNumber() GLSL version} being used.
+     * <p>
+     * Note: The shader source to be edit must be created using a mutable StringBuilder.
+     * </p>
+     * @param gl a GL context, which must have been made current once
+     * @param pos position within this mutable shader source.
+     * @return the index after the inserted data, maybe 0 if nothing has be inserted.
+     */
+    public final int addDefaultShaderPrecision(GL2ES2 gl, int pos) {
+        final String defaultPrecision;
+        if( gl.isGLES2() ) {
+            switch ( shaderType ) {
+                case GL2ES2.GL_VERTEX_SHADER:
+                    defaultPrecision = es2_default_precision_vp; break;
+                case GL2ES2.GL_FRAGMENT_SHADER:
+                    defaultPrecision = es2_default_precision_fp; break;
+                default:
+                    defaultPrecision = null;
+                    break;
+            }
+        } else if( gl.isGLES3() ) {
+            switch ( shaderType ) {
+                case GL2ES2.GL_VERTEX_SHADER:
+                    defaultPrecision = es3_default_precision_vp; break;
+                case GL2ES2.GL_FRAGMENT_SHADER:
+                    defaultPrecision = es3_default_precision_fp; break;
+                default:
+                    defaultPrecision = null;
+                    break;
+            }
+        } else if( requiresGL3DefaultPrecision(gl) ) {
+            // GLSL [ 1.30 .. 1.50 [ needs at least fragement float default precision!
+            switch ( shaderType ) {
+                case GL2ES2.GL_VERTEX_SHADER:
+                case GL3.GL_GEOMETRY_SHADER:
+                    defaultPrecision = gl3_default_precision_vp_gp; break;
+                case GL2ES2.GL_FRAGMENT_SHADER:
+                    defaultPrecision = gl3_default_precision_fp; break;
+                default:
+                    defaultPrecision = null;
+                    break;
+            }
+        } else {
+            defaultPrecision = null;
+        }
+        if( null != defaultPrecision ) {
+            pos = insertShaderSource(0, pos, defaultPrecision);
+        }
+        return pos;
+    }
+
+    /** Returns true, if GLSL version requires default precision, i.e. ES2 or GLSL [1.30 .. 1.50[. */
+    public static final boolean requiresDefaultPrecision(GL2ES2 gl) {
+        if( gl.isGLES() ) {
+            return true;
+        }
+        return requiresGL3DefaultPrecision(gl);
+    }
+
+    /** Returns true, if GL3 GLSL version requires default precision, i.e. GLSL [1.30 .. 1.50[. */
+    public static final boolean requiresGL3DefaultPrecision(GL2ES2 gl) {
+        if( gl.isGL3() ) {
+            final VersionNumber glslVersion = gl.getContext().getGLSLVersionNumber();
+            return glslVersion.compareTo(GLContext.Version130) >= 0 && glslVersion.compareTo(GLContext.Version150) < 0 ;
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * Default customization of this shader source code.
+     * <p>
+     * Note: The shader source to be edit must be created using a mutable StringBuilder.
+     * </p>
+     * @param gl a GL context, which must have been made current once
+     * @param preludeVersion if true {@link GLContext#getGLSLVersionString()} is preluded, otherwise not.
+     * @param addDefaultPrecision if <code>true</code> default precision source code line(s) are added, i.e.
+     *                            {@link #es2_default_precision_vp}, {@link #es2_default_precision_fp},
+     *                            {@link #gl3_default_precision_vp_gp}, {@link #gl3_default_precision_fp} or none,
+     *                            depending on the {@link GLContext#getGLSLVersionNumber() GLSL version} being used.
+     * @return the index after the inserted data, maybe 0 if nothing has be inserted.
+     * @see #addGLSLVersion(GL2ES2)
+     * @see #addDefaultShaderPrecision(GL2ES2, int)
+     */
+    public final int defaultShaderCustomization(GL2ES2 gl, boolean preludeVersion, boolean addDefaultPrecision) {
+        int pos;
+        if( preludeVersion ) {
+            pos = addGLSLVersion(gl);
+        } else {
+            pos = 0;
+        }
+        if( addDefaultPrecision ) {
+            pos = addDefaultShaderPrecision(gl, pos);
+        }
+        return pos;
+    }
+
+    /**
+     * Default customization of this shader source code.
+     * <p>
+     * Note: The shader source to be edit must be created using a mutable StringBuilder.
+     * </p>
+     * @param gl a GL context, which must have been made current once
+     * @param preludeVersion if true {@link GLContext#getGLSLVersionString()} is preluded, otherwise not.
+     * @param esDefaultPrecision optional default precision source code line(s) preluded if not null and if {@link GL#isGLES()}.
+     *        You may use {@link #es2_default_precision_fp} for fragment shader and {@link #es2_default_precision_vp} for vertex shader.
+     * @return the index after the inserted data, maybe 0 if nothing has be inserted.
+     * @see #addGLSLVersion(GL2ES2)
+     * @see #addDefaultShaderPrecision(GL2ES2, int)
+     */
+    public final int defaultShaderCustomization(GL2ES2 gl, boolean preludeVersion, String esDefaultPrecision) {
+        int pos;
+        if( preludeVersion ) {
+            pos = addGLSLVersion(gl);
+        } else {
+            pos = 0;
+        }
+        if( gl.isGLES() && null != esDefaultPrecision ) {
+            pos = insertShaderSource(0, pos, esDefaultPrecision);
+        } else {
+            pos = addDefaultShaderPrecision(gl, pos);
+        }
+        return pos;
+    }
+
     //----------------------------------------------------------------------
     // Internals only below this point
     //
diff --git a/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderProgram.java b/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderProgram.java
index 14ea7d2b8..b289b41e2 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderProgram.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderProgram.java
@@ -37,7 +37,7 @@ import java.util.Iterator;
 import java.io.PrintStream;
 
 public class ShaderProgram {
-    
+
     public ShaderProgram() {
         id = getNextID();
     }
@@ -50,6 +50,7 @@ public class ShaderProgram {
         return programInUse;
     }
 
+    /** Returns the shader program name, which is non zero if valid. */
     public int program() { return shaderProgram; }
 
     /**
@@ -84,7 +85,9 @@ public class ShaderProgram {
      * If <code>destroyShaderCode</code> is true it destroys the shader codes as well.
      */
     public synchronized void release(GL2ES2 gl, boolean destroyShaderCode) {
-        useProgram(gl, false);
+        if( programLinked ) {
+            useProgram(gl, false);
+        }
         for(Iterator<ShaderCode> iter=allShaderCode.iterator(); iter.hasNext(); ) {
             ShaderCode shaderCode = iter.next();
             if(attachedShaderCode.remove(shaderCode)) {
@@ -96,9 +99,9 @@ public class ShaderProgram {
         }
         allShaderCode.clear();
         attachedShaderCode.clear();
-        if(0<=shaderProgram) {
+        if( 0 != shaderProgram ) {
             gl.glDeleteProgram(shaderProgram);
-            shaderProgram=-1;
+            shaderProgram=0;
         }
     }
 
@@ -108,7 +111,7 @@ public class ShaderProgram {
 
     /**
      * Adds a new shader to this program.
-     * 
+     *
      * <p>This command does not compile and attach the shader,
      * use {@link #add(GL2ES2, ShaderCode)} for this purpose.</p>
      */
@@ -119,7 +122,7 @@ public class ShaderProgram {
     public synchronized boolean contains(ShaderCode shaderCode) {
         return allShaderCode.contains(shaderCode);
     }
-    
+
     /**
      * Warning slow O(n) operation ..
      * @param id
@@ -140,30 +143,33 @@ public class ShaderProgram {
     //
 
     /**
-     * Creates the empty GL program object using {@link GL2ES2#glCreateProgram()}
-     *  
+     * Creates the empty GL program object using {@link GL2ES2#glCreateProgram()},
+     * if not already created.
+     *
      * @param gl
+     * @return true if shader program is valid, i.e. not zero
      */
-    public synchronized final void init(GL2ES2 gl) {
-        if(0>shaderProgram) {
+    public synchronized final boolean init(GL2ES2 gl) {
+        if( 0 == shaderProgram ) {
             shaderProgram = gl.glCreateProgram();
         }
+        return 0 != shaderProgram;
     }
-    
+
     /**
      * Adds a new shader to a this non running program.
      *
      * <p>Compiles and attaches the shader, if not done yet.</p>
-     * 
+     *
      * @return true if the shader was successfully added, false if compilation failed.
      */
     public synchronized boolean add(GL2ES2 gl, ShaderCode shaderCode, PrintStream verboseOut) {
-        init(gl);
+        if( !init(gl) ) { return false; }
         if( allShaderCode.add(shaderCode) ) {
-            if(!shaderCode.compile(gl, verboseOut)) {
+            if( !shaderCode.compile(gl, verboseOut) ) {
                 return false;
             }
-            if(attachedShaderCode.add(shaderCode)) {
+            if( attachedShaderCode.add(shaderCode) ) {
                 ShaderUtil.attachShader(gl, shaderProgram, shaderCode.shader());
             }
         }
@@ -173,11 +179,11 @@ public class ShaderProgram {
     /**
      * Replace a shader in a program and re-links the program.
      *
-     * @param gl 
+     * @param gl
      * @param oldShader   the to be replace Shader
      * @param newShader   the new ShaderCode
      * @param verboseOut  the optional verbose output stream
-     * 
+     *
      * @return true if all steps are valid, shader compilation, attachment and linking; otherwise false.
      *
      * @see ShaderState#glEnableVertexAttribArray
@@ -190,31 +196,29 @@ public class ShaderProgram {
      * @see ShaderState#glResetAllVertexAttributes
      */
     public synchronized boolean replaceShader(GL2ES2 gl, ShaderCode oldShader, ShaderCode newShader, PrintStream verboseOut) {
-        init(gl);
-        
-        if(!newShader.compile(gl, verboseOut)) {
+        if(!init(gl) || !newShader.compile(gl, verboseOut)) {
             return false;
         }
-        
+
         boolean shaderWasInUse = inUse();
         if(shaderWasInUse) {
             useProgram(gl, false);
         }
-        
+
         if(null != oldShader && allShaderCode.remove(oldShader)) {
             if(attachedShaderCode.remove(oldShader)) {
                 ShaderUtil.detachShader(gl, shaderProgram, oldShader.shader());
             }
         }
-        
+
         add(newShader);
         if(attachedShaderCode.add(newShader)) {
             ShaderUtil.attachShader(gl, shaderProgram, newShader.shader());
         }
-        
+
         gl.glLinkProgram(shaderProgram);
-        
-        programLinked = ShaderUtil.isProgramLinkStatusValid(gl, shaderProgram, System.err);
+
+        programLinked = ShaderUtil.isProgramLinkStatusValid(gl, shaderProgram, verboseOut);
         if ( programLinked && shaderWasInUse )  {
             useProgram(gl, true);
         }
@@ -223,23 +227,27 @@ public class ShaderProgram {
 
     /**
      * Links the shader code to the program.
-     * 
+     *
      * <p>Compiles and attaches the shader code to the program if not done by yet</p>
-     * 
+     *
      * <p>Within this process, all GL resources (shader and program objects) are created if necessary.</p>
-     *  
+     *
      * @param gl
      * @param verboseOut
      * @return true if program was successfully linked and is valid, otherwise false
-     * 
+     *
      * @see #init(GL2ES2)
      */
     public synchronized boolean link(GL2ES2 gl, PrintStream verboseOut) {
-        init(gl);
+        if( !init(gl) ) {
+            programLinked = false; // mark unlinked due to user attempt to [re]link
+            return false;
+        }
 
         for(Iterator<ShaderCode> iter=allShaderCode.iterator(); iter.hasNext(); ) {
             final ShaderCode shaderCode = iter.next();
             if(!shaderCode.compile(gl, verboseOut)) {
+                programLinked = false; // mark unlinked due to user attempt to [re]link
                 return false;
             }
             if(attachedShaderCode.add(shaderCode)) {
@@ -250,11 +258,12 @@ public class ShaderProgram {
         // Link the program
         gl.glLinkProgram(shaderProgram);
 
-        programLinked = ShaderUtil.isProgramLinkStatusValid(gl, shaderProgram, System.err);
+        programLinked = ShaderUtil.isProgramLinkStatusValid(gl, shaderProgram, verboseOut);
 
         return programLinked;
     }
 
+    @Override
     public boolean equals(Object obj) {
         if(this == obj)  { return true; }
         if(obj instanceof ShaderProgram) {
@@ -263,6 +272,7 @@ public class ShaderProgram {
         return false;
     }
 
+    @Override
     public int hashCode() {
         return id;
     }
@@ -279,7 +289,8 @@ public class ShaderProgram {
         sb.append("]");
         return sb;
     }
-        
+
+    @Override
     public String toString() {
         return toString(null).toString();
     }
@@ -291,17 +302,20 @@ public class ShaderProgram {
     public synchronized boolean validateProgram(GL2ES2 gl, PrintStream verboseOut) {
         return ShaderUtil.isProgramExecStatusValid(gl, shaderProgram, verboseOut);
     }
-    
+
     public synchronized void useProgram(GL2ES2 gl, boolean on) {
         if(!programLinked) { throw new GLException("Program is not linked"); }
         if(programInUse==on) { return; }
-        gl.glUseProgram(on?shaderProgram:0);
+        if( 0 == shaderProgram ) {
+            on = false;
+        }
+        gl.glUseProgram( on ? shaderProgram : 0 );
         programInUse = on;
     }
 
     protected boolean programLinked = false;
     protected boolean programInUse = false;
-    protected int shaderProgram=-1;
+    protected int shaderProgram = 0; // non zero is valid!
     protected HashSet<ShaderCode> allShaderCode = new HashSet<ShaderCode>();
     protected HashSet<ShaderCode> attachedShaderCode = new HashSet<ShaderCode>();
     protected int id = -1;
diff --git a/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderState.java b/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderState.java
index 62082aacd..f60cb6088 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderState.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderState.java
@@ -35,66 +35,40 @@ import java.util.Iterator;
 import javax.media.opengl.GL;
 import javax.media.opengl.GL2ES2;
 import javax.media.opengl.GLArrayData;
-import javax.media.opengl.GLContext;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLUniformData;
 
 import jogamp.opengl.Debug;
 
 import com.jogamp.common.os.Platform;
-import com.jogamp.common.util.IntObjectHashMap;
 import com.jogamp.opengl.util.GLArrayDataEditable;
 
+/**
+ * ShaderState allows to sharing data between shader programs,
+ * while updating the attribute and uniform locations when switching.
+ * <p>
+ * This allows seamless switching of programs using <i>almost</i> same data
+ * but performing different artifacts.
+ * </p>
+ * <p>
+ * A {@link #useProgram(GL2ES2, boolean) used} ShaderState is attached to the current GL context
+ * and can be retrieved via {@link #getShaderState(GL)}.
+ * </p>
+ */
 public class ShaderState {
-    public static final boolean DEBUG = Debug.isPropertyDefined("jogl.debug.GLSLState", true);
-    private static final String currentStateKey = "jogamp.opengl.glsl.ShaderState" ;
-    
-    public ShaderState() {
-    }
-
-    public boolean verbose() { return verbose; }
+    public static final boolean DEBUG;
 
-    public void setVerbose(boolean v) { verbose=v; }
-
-    /**
-     * Fetches the current shader state from this thread (TLS) current GLContext
-     *
-     * @see com.jogamp.opengl.util.glsl.ShaderState#useProgram(GL2ES2, boolean)
-     * @see com.jogamp.opengl.util.glsl.ShaderState#getShaderState(GL)
-     * @see com.jogamp.opengl.util.glsl.ShaderState#setShaderState(GL)
-     * @see com.jogamp.opengl.util.glsl.ShaderState#getCurrentShaderState()
-     */
-    public static ShaderState getCurrentShaderState() { 
-        return getShaderState(GLContext.getCurrentGL());
+    static {
+        Debug.initSingleton();
+        DEBUG = Debug.isPropertyDefined("jogl.debug.GLSLState", true);
     }
 
-    /**
-     * Gets the shader state attached to the GL object's GLContext
-     *
-     * @param gl the GL object referencing the GLContext
-     * 
-     * @see com.jogamp.opengl.util.glsl.ShaderState#useProgram(GL2ES2, boolean)
-     * @see com.jogamp.opengl.util.glsl.ShaderState#getShaderState(GL)
-     * @see com.jogamp.opengl.util.glsl.ShaderState#setShaderState(GL)
-     * @see com.jogamp.opengl.util.glsl.ShaderState#getCurrentShaderState()
-     */
-    public static ShaderState getShaderState(GL gl) { 
-        return (ShaderState) gl.getContext().getAttachedObject(currentStateKey);
+    public ShaderState() {
     }
 
-    /**
-     * Attaches the shader state to the GL object's GLContext
-     *
-     * @param gl the GL object referencing the GLContext
-     * 
-     * @see com.jogamp.opengl.util.glsl.ShaderState#useProgram(GL2ES2, boolean)
-     * @see com.jogamp.opengl.util.glsl.ShaderState#getShaderState(GL)
-     * @see com.jogamp.opengl.util.glsl.ShaderState#setShaderState(GL)
-     * @see com.jogamp.opengl.util.glsl.ShaderState#getCurrentShaderState()
-     */
-    public final ShaderState setShaderState(GL gl) { 
-        return (ShaderState) gl.getContext().attachObject(currentStateKey, this);
-    }
+    public boolean verbose() { return verbose; }
+
+    public void setVerbose(boolean v) { verbose = DEBUG || v; }
 
     /**
      * Returns the attached user object for the given name to this ShaderState.
@@ -106,7 +80,7 @@ public class ShaderState {
     /**
      * Attach user object for the given name to this ShaderState.
      * Returns the previously set object or null.
-     * 
+     *
      * @return the previous mapped object or null if none
      */
     public final Object attachObject(String name, Object obj) {
@@ -115,54 +89,30 @@ public class ShaderState {
 
     /**
      * @param name name of the mapped object to detach
-     * 
+     *
      * @return the previous mapped object or null if none
      */
     public final Object detachObject(String name) {
         return attachedObjectsByString.remove(name);
-    }    
-    
-    /**
-     * Returns the attached user object for the given name to this ShaderState.
-     */
-    public final Object getAttachedObject(int name) {
-      return attachedObjectsByInt.get(name);
-    }
-
-    /**
-     * Attach user object for the given name to this ShaderState.
-     * Returns the previously set object or null.
-     */
-    public final Object attachObject(int name, Object obj) {
-      return attachedObjectsByInt.put(name, obj);
     }
 
-    public final Object detachObject(int name) {
-        return attachedObjectsByInt.remove(name);
-    }    
-    
     /**
      * Turns the shader program on or off.<br>
-     * Puts this ShaderState to to the thread local storage (TLS),
-     * if <code>on</code> is <code>true</code>.
      *
      * @throws GLException if no program is attached
      *
      * @see com.jogamp.opengl.util.glsl.ShaderState#useProgram(GL2ES2, boolean)
-     * @see com.jogamp.opengl.util.glsl.ShaderState#getShaderState(GL)
-     * @see com.jogamp.opengl.util.glsl.ShaderState#getCurrentShaderState()
      */
     public synchronized void useProgram(GL2ES2 gl, boolean on) throws GLException {
-        if(null==shaderProgram) { throw new GLException("No program is attached"); }        
+        if(null==shaderProgram) { throw new GLException("No program is attached"); }
         if(on) {
-            setShaderState(gl);
             if(shaderProgram.linked()) {
                 shaderProgram.useProgram(gl, true);
                 if(resetAllShaderData) {
                     resetAllAttributes(gl);
                     resetAllUniforms(gl);
                 }
-            } else { 
+            } else {
                 if(resetAllShaderData) {
                     setAllAttributes(gl);
                 }
@@ -174,7 +124,7 @@ public class ShaderState {
                     resetAllUniforms(gl);
                 }
             }
-            resetAllShaderData = false;            
+            resetAllShaderData = false;
         } else {
             shaderProgram.useProgram(gl, false);
         }
@@ -191,34 +141,38 @@ public class ShaderState {
     /**
      * Attach or switch a shader program
      *
-     * <p>Attaching a shader program the first time, 
+     * <p>Attaching a shader program the first time,
      * as well as switching to another program on the fly,
      * while managing all attribute and uniform data.</p>
-     * 
+     *
      * <p>[Re]sets all data and use program in case of a program switch.</p>
-     *  
+     *
      * <p>Use program, {@link #useProgram(GL2ES2, boolean)},
      * if <code>enable</code> is <code>true</code>.</p>
-     * 
+     *
+     * @return true if shader program was attached, otherwise false (already attached)
+     *
      * @throws GLException if program was not linked and linking fails
      */
-    public synchronized void attachShaderProgram(GL2ES2 gl, ShaderProgram prog, boolean enable) throws GLException {
-        if(DEBUG) {
+    public synchronized boolean attachShaderProgram(GL2ES2 gl, ShaderProgram prog, boolean enable) throws GLException {
+        if(verbose) {
             int curId = (null!=shaderProgram)?shaderProgram.id():-1;
             int newId = (null!=prog)?prog.id():-1;
-            System.err.println("Info: attachShaderProgram: "+curId+" -> "+newId+" (enable: "+enable+")\n\t"+shaderProgram+"\n\t"+prog);
-            if(verbose) {
-                Throwable tX = new Throwable("Info: attachShaderProgram: Trace");
-                tX.printStackTrace();
+            System.err.println("ShaderState: attachShaderProgram: "+curId+" -> "+newId+" (enable: "+enable+")\n\t"+shaderProgram+"\n\t"+prog);
+            if(DEBUG) {
+                Thread.dumpStack();
             }
         }
         if(null!=shaderProgram) {
             if(shaderProgram.equals(prog)) {
-                // nothing to do ..
-                if(DEBUG) {
-                    System.err.println("Info: attachShaderProgram: NOP: equal id: "+shaderProgram.id());
+                if(enable) {
+                    useProgram(gl, true);
+                }
+                // nothing else to do ..
+                if(verbose) {
+                    System.err.println("ShaderState: attachShaderProgram: No switch, equal id: "+shaderProgram.id()+", enabling "+enable);
                 }
-                return;
+                return false;
             }
             if(shaderProgram.inUse()) {
                 if(null != prog && enable) {
@@ -236,7 +190,7 @@ public class ShaderState {
         shaderProgram = prog;
 
         if(null!=shaderProgram) {
-            // [re]set all data and use program if switching program, 
+            // [re]set all data and use program if switching program,
             // or  use program if program is linked
             if(resetAllShaderData || enable) {
                 useProgram(gl, true); // may reset all data
@@ -248,6 +202,7 @@ public class ShaderState {
         if(DEBUG) {
             System.err.println("Info: attachShaderProgram: END");
         }
+        return true;
     }
 
     public ShaderProgram shaderProgram() { return shaderProgram; }
@@ -261,8 +216,7 @@ public class ShaderState {
      */
     public synchronized void destroy(GL2ES2 gl) {
         release(gl, true, true, true);
-        attachedObjectsByString.clear();        
-        attachedObjectsByInt.clear();
+        attachedObjectsByString.clear();
     }
 
     /**
@@ -282,13 +236,13 @@ public class ShaderState {
      * @see ShaderProgram#release(GL2ES2, boolean)
      */
     public synchronized void release(GL2ES2 gl, boolean destroyBoundAttributes, boolean destroyShaderProgram, boolean destroyShaderCode) {
-        if(null!=shaderProgram) {            
+        if(null!=shaderProgram && shaderProgram.linked() ) {
             shaderProgram.useProgram(gl, false);
         }
         if(destroyBoundAttributes) {
             for(Iterator<GLArrayData> iter = managedAttributes.iterator(); iter.hasNext(); ) {
                 iter.next().destroy(gl);
-            }            
+            }
         }
         releaseAllAttributes(gl);
         releaseAllUniforms(gl);
@@ -304,7 +258,7 @@ public class ShaderState {
     /**
      * Gets the cached location of a shader attribute.
      *
-     * @return -1 if there is no such attribute available, 
+     * @return -1 if there is no such attribute available,
      *         otherwise >= 0
      *
      * @see #bindAttribLocation(GL2ES2, int, String)
@@ -316,7 +270,7 @@ public class ShaderState {
         Integer idx = activeAttribLocationMap.get(name);
         return (null!=idx)?idx.intValue():-1;
     }
-    
+
     /**
      * Get the previous cached vertex attribute data.
      *
@@ -335,23 +289,30 @@ public class ShaderState {
     public GLArrayData getAttribute(String name) {
         return activeAttribDataMap.get(name);
     }
-    
+
+    public boolean isActiveAttribute(GLArrayData attribute) {
+        return attribute == activeAttribDataMap.get(attribute.getName());
+    }
+
     /**
      * Binds or unbinds the {@link GLArrayData} lifecycle to this ShaderState.
-     *  
+     *
      * <p>If an attribute location is cached (ie {@link #bindAttribLocation(GL2ES2, int, String)})
      * it is promoted to the {@link GLArrayData} instance.</p>
-     * 
-     * <p>The attribute will be destroyed with {@link #destroy(GL2ES2)} 
+     *
+     * <p>The attribute will be destroyed with {@link #destroy(GL2ES2)}
      * and it's location will be reset when switching shader with {@link #attachShaderProgram(GL2ES2, ShaderProgram)}.</p>
-     *  
+     *
      * <p>The data will not be transfered to the GPU, use {@link #vertexAttribPointer(GL2ES2, GLArrayData)} additionally.</p>
-     * 
+     *
+     * <p>The data will also be {@link GLArrayData#associate(Object, boolean) associated} with this ShaderState.</p>
+     *
      * @param attribute the {@link GLArrayData} which lifecycle shall be managed
      * @param own true if <i>owning</i> shall be performs, false if <i>disowning</i>.
-     * 
+     *
      * @see #bindAttribLocation(GL2ES2, int, String)
      * @see #getAttribute(String)
+     * @see GLArrayData#associate(Object, boolean)
      */
     public void ownAttribute(GLArrayData attribute, boolean own) {
         if(own) {
@@ -363,12 +324,13 @@ public class ShaderState {
         } else {
             managedAttributes.remove(attribute);
         }
+        attribute.associate(this, own);
     }
-    
+
     public boolean ownsAttribute(GLArrayData attribute) {
         return managedAttributes.contains(attribute);
     }
-    
+
     /**
      * Binds a shader attribute to a location.
      * Multiple names can be bound to one location.
@@ -377,14 +339,14 @@ public class ShaderState {
      *
      * @throws GLException if no program is attached
      * @throws GLException if the program is already linked
-     * 
+     *
      * @see javax.media.opengl.GL2ES2#glBindAttribLocation(int, int, String)
      * @see #getAttribLocation(GL2ES2, String)
      * @see #getCachedAttribLocation(String)
      */
     public void bindAttribLocation(GL2ES2 gl, int location, String name) {
         if(null==shaderProgram) throw new GLException("No program is attached");
-        if(shaderProgram.linked()) throw new GLException("Program is already linked");        
+        if(shaderProgram.linked()) throw new GLException("Program is already linked");
         final Integer loc = new Integer(location);
         activeAttribLocationMap.put(name, loc);
         gl.glBindAttribLocation(shaderProgram.program(), location, name);
@@ -399,25 +361,28 @@ public class ShaderState {
      *
      * @throws GLException if no program is attached
      * @throws GLException if the program is already linked
-     * 
+     *
      * @see javax.media.opengl.GL2ES2#glBindAttribLocation(int, int, String)
      * @see #getAttribLocation(GL2ES2, String)
      * @see #getCachedAttribLocation(String)
      * @see #getAttribute(String)
      */
     public void bindAttribLocation(GL2ES2 gl, int location, GLArrayData data) {
-        bindAttribLocation(gl, location, data.getName());
-        data.setLocation(location);
+        if(null==shaderProgram) throw new GLException("No program is attached");
+        if(shaderProgram.linked()) throw new GLException("Program is already linked");
+        final String name = data.getName();
+        activeAttribLocationMap.put(name, new Integer(location));
+        data.setLocation(gl, shaderProgram.program(), location);
         activeAttribDataMap.put(data.getName(), data);
     }
 
     /**
-     * Gets the location of a shader attribute.<br>
+     * Gets the location of a shader attribute with given <code>name</code>.<br>
      * Uses either the cached value {@link #getCachedAttribLocation(String)} if valid,
      * or the GLSL queried via {@link GL2ES2#glGetAttribLocation(int, String)}.<br>
      * The location will be cached.
      *
-     * @return -1 if there is no such attribute available, 
+     * @return -1 if there is no such attribute available,
      *         otherwise >= 0
      * @throws GLException if no program is attached
      * @throws GLException if the program is not linked and no location was cached.
@@ -434,14 +399,15 @@ public class ShaderState {
             if(!shaderProgram.linked()) throw new GLException("Program is not linked");
             location = gl.glGetAttribLocation(shaderProgram.program(), name);
             if(0<=location) {
-                Integer idx = new Integer(location);
-                activeAttribLocationMap.put(name, idx);
+                activeAttribLocationMap.put(name, new Integer(location));
                 if(DEBUG) {
-                    System.err.println("Info: glGetAttribLocation: "+name+", loc: "+location);
+                    System.err.println("ShaderState: glGetAttribLocation: "+name+", loc: "+location);
                 }
             } else if(verbose) {
-                Throwable tX = new Throwable("Info: glGetAttribLocation failed, no location for: "+name+", loc: "+location);
-                tX.printStackTrace();
+                System.err.println("ShaderState: glGetAttribLocation failed, no location for: "+name+", loc: "+location);
+                if(DEBUG) {
+                    Thread.dumpStack();
+                }
             }
         }
         return location;
@@ -449,14 +415,14 @@ public class ShaderState {
 
     /**
      * Validates and returns the location of a shader attribute.<br>
-     * Uses either the cached value {@link #getCachedAttribLocation(String)} if valid, 
+     * Uses either the cached value {@link #getCachedAttribLocation(String)} if valid,
      * or the GLSL queried via {@link GL2ES2#glGetAttribLocation(int, String)}.<br>
-     * The location will be cached and set in the  
+     * The location will be cached and set in the
      * {@link GLArrayData} object.
      *
-     * @return -1 if there is no such attribute available, 
+     * @return -1 if there is no such attribute available,
      *         otherwise >= 0
-     *         
+     *
      * @throws GLException if no program is attached
      * @throws GLException if the program is not linked and no location was cached.
      *
@@ -467,12 +433,31 @@ public class ShaderState {
      * @see #getAttribute(String)
      */
     public int getAttribLocation(GL2ES2 gl, GLArrayData data) {
-        int location = getAttribLocation(gl, data.getName());
-        data.setLocation(location);
+        if(null==shaderProgram) throw new GLException("No program is attached");
+        final String name = data.getName();
+        int location = getCachedAttribLocation(name);
+        if(0<=location) {
+            data.setLocation(location);
+        } else {
+            if(!shaderProgram.linked()) throw new GLException("Program is not linked");
+            location = data.setLocation(gl, shaderProgram.program());
+            if(0<=location) {
+                Integer idx = new Integer(location);
+                activeAttribLocationMap.put(name, idx);
+                if(DEBUG) {
+                    System.err.println("ShaderState: glGetAttribLocation: "+name+", loc: "+location);
+                }
+            } else if(verbose) {
+                System.err.println("ShaderState: glGetAttribLocation failed, no location for: "+name+", loc: "+location);
+                if(DEBUG) {
+                    Thread.dumpStack();
+                }
+            }
+        }
         activeAttribDataMap.put(data.getName(), data);
         return location;
     }
-    
+
     //
     // Enabled Vertex Arrays and its data
     //
@@ -484,38 +469,40 @@ public class ShaderState {
         final Boolean v = activedAttribEnabledMap.get(name);
         return null != v && v.booleanValue();
     }
-    
+
     /**
      * @return true if the {@link GLArrayData} attribute is enable
      */
     public final boolean isVertexAttribArrayEnabled(GLArrayData data) {
         return isVertexAttribArrayEnabled(data.getName());
     }
-    
+
     private boolean enableVertexAttribArray(GL2ES2 gl, String name, int location) {
         activedAttribEnabledMap.put(name, Boolean.TRUE);
         if(0>location) {
             location = getAttribLocation(gl, name);
             if(0>location) {
                 if(verbose) {
-                    Throwable tX = new Throwable("Info: glEnableVertexAttribArray failed, no index for: "+name);
-                    tX.printStackTrace();
+                    System.err.println("ShaderState: glEnableVertexAttribArray failed, no index for: "+name);
+                    if(DEBUG) {
+                        Thread.dumpStack();
+                    }
                 }
                 return false;
             }
         }
         if(DEBUG) {
-            System.err.println("Info: glEnableVertexAttribArray: "+name+", loc: "+location);
+            System.err.println("ShaderState: glEnableVertexAttribArray: "+name+", loc: "+location);
         }
         gl.glEnableVertexAttribArray(location);
         return true;
     }
-    
+
     /**
      * Enables a vertex attribute array.
-     * 
+     *
      * This method retrieves the the location via {@link #getAttribLocation(GL2ES2, GLArrayData)}
-     * hence {@link #enableVertexAttribArray(GL2ES2, GLArrayData)} shall be preferred. 
+     * hence {@link #enableVertexAttribArray(GL2ES2, GLArrayData)} shall be preferred.
      *
      * Even if the attribute is not found in the current shader,
      * it is marked enabled in this state.
@@ -523,7 +510,7 @@ public class ShaderState {
      * @return false, if the name is not found, otherwise true
      *
      * @throws GLException if the program is not linked and no location was cached.
-     * 
+     *
      * @see #glEnableVertexAttribArray
      * @see #glDisableVertexAttribArray
      * @see #glVertexAttribPointer
@@ -532,7 +519,7 @@ public class ShaderState {
     public boolean enableVertexAttribArray(GL2ES2 gl, String name) {
         return enableVertexAttribArray(gl, name, -1);
     }
-    
+
 
     /**
      * Enables a vertex attribute array, usually invoked by {@link GLArrayDataEditable#enableBuffer(GL, boolean)}.
@@ -541,7 +528,7 @@ public class ShaderState {
      * and is the preferred alternative to {@link #enableVertexAttribArray(GL2ES2, String)}.
      * If data location is unset it will be retrieved via {@link #getAttribLocation(GL2ES2, GLArrayData)} set
      * and cached in this state.
-     *  
+     *
      * Even if the attribute is not found in the current shader,
      * it is marked enabled in this state.
      *
@@ -560,36 +547,38 @@ public class ShaderState {
             getAttribLocation(gl, data);
         } else {
             // ensure data is the current bound one
-            activeAttribDataMap.put(data.getName(), data);             
+            activeAttribDataMap.put(data.getName(), data);
         }
         return enableVertexAttribArray(gl, data.getName(), data.getLocation());
     }
-    
+
     private boolean disableVertexAttribArray(GL2ES2 gl, String name, int location) {
         activedAttribEnabledMap.put(name, Boolean.FALSE);
         if(0>location) {
             location = getAttribLocation(gl, name);
             if(0>location) {
                 if(verbose) {
-                    Throwable tX = new Throwable("Info: glDisableVertexAttribArray failed, no index for: "+name);
-                    tX.printStackTrace();
+                    System.err.println("ShaderState: glDisableVertexAttribArray failed, no index for: "+name);
+                    if(DEBUG) {
+                        Thread.dumpStack();
+                    }
                 }
                 return false;
             }
         }
         if(DEBUG) {
-            System.err.println("Info: glDisableVertexAttribArray: "+name);
+            System.err.println("ShaderState: glDisableVertexAttribArray: "+name);
         }
         gl.glDisableVertexAttribArray(location);
         return true;
     }
-    
+
     /**
      * Disables a vertex attribute array
      *
      * This method retrieves the the location via {@link #getAttribLocation(GL2ES2, GLArrayData)}
      * hence {@link #disableVertexAttribArray(GL2ES2, GLArrayData)} shall be preferred.
-     *  
+     *
      * Even if the attribute is not found in the current shader,
      * it is removed from this state enabled list.
      *
@@ -614,7 +603,7 @@ public class ShaderState {
      * and is the preferred alternative to {@link #disableVertexAttribArray(GL2ES2, String)}.
      * If data location is unset it will be retrieved via {@link #getAttribLocation(GL2ES2, GLArrayData)} set
      * and cached in this state.
-     *  
+     *
      * Even if the attribute is not found in the current shader,
      * it is removed from this state enabled list.
      *
@@ -634,19 +623,20 @@ public class ShaderState {
         }
         return disableVertexAttribArray(gl, data.getName(), data.getLocation());
     }
-    
+
     /**
-     * Set the {@link GLArrayData} vertex attribute data.
-     * 
-     * This method uses the {@link GLArrayData}'s location if set.
-     * If data location is unset it will be retrieved via {@link #getAttribLocation(GL2ES2, GLArrayData)}, set
-     * and cached in this state.
-     * 
+     * Set the {@link GLArrayData} vertex attribute data, if it's location is valid, i.e. &ge; 0.
+     * <p>
+     * This method uses the {@link GLArrayData}'s location if valid, i.e. &ge; 0.<br/>
+     * If data's location is invalid, it will be retrieved via {@link #getAttribLocation(GL2ES2, GLArrayData)},
+     * set and cached in this state.
+     * </p>
+     *
      * @return false, if the location could not be determined, otherwise true
      *
      * @throws GLException if no program is attached
      * @throws GLException if the program is not linked and no location was cached.
-     * 
+     *
      * @see #glEnableVertexAttribArray
      * @see #glDisableVertexAttribArray
      * @see #glVertexAttribPointer
@@ -656,11 +646,11 @@ public class ShaderState {
         int location = data.getLocation();
         if(0 > location) {
             location = getAttribLocation(gl, data);
-        } 
+        }
         if(0 <= location) {
             // only pass the data, if the attribute exists in the current shader
             if(DEBUG) {
-                System.err.println("Info: glVertexAttribPointer: "+data);
+                System.err.println("ShaderState: glVertexAttribPointer: "+data);
             }
             gl.glVertexAttribPointer(data);
             return true;
@@ -693,16 +683,16 @@ public class ShaderState {
         activeAttribDataMap.clear();
         activedAttribEnabledMap.clear();
         activeAttribLocationMap.clear();
-        managedAttributes.clear();        
+        managedAttributes.clear();
     }
-        
+
     /**
      * Disables all vertex attribute arrays.
      *
      * Their enabled stated will be removed from this state only
      * if 'removeFromState' is true.
      *
-     * This method purpose is more for debugging. 
+     * This method purpose is more for debugging.
      *
      * @see #glEnableVertexAttribArray
      * @see #glDisableVertexAttribArray
@@ -727,34 +717,45 @@ public class ShaderState {
     }
 
     private final void relocateAttribute(GL2ES2 gl, GLArrayData attribute) {
-        // get new location ..
+        // get new location .. note: 'activeAttribLocationMap' is cleared before
         final String name = attribute.getName();
-        final int loc = getAttribLocation(gl, name);
-        attribute.setLocation(loc);
-
+        final int loc = attribute.setLocation(gl, shaderProgram.program());
         if(0<=loc) {
+            activeAttribLocationMap.put(name, new Integer(loc));
+            if(DEBUG) {
+                System.err.println("ShaderState: relocateAttribute: "+name+", loc: "+loc);
+            }
             if(isVertexAttribArrayEnabled(name)) {
                 // enable attrib, VBO and pass location/data
                 gl.glEnableVertexAttribArray(loc);
             }
-    
+
             if( attribute.isVBO() ) {
                 gl.glBindBuffer(GL.GL_ARRAY_BUFFER, attribute.getVBOName());
-            } 
-    
-            gl.glVertexAttribPointer(attribute);
+                gl.glVertexAttribPointer(attribute);
+                gl.glBindBuffer(GL.GL_ARRAY_BUFFER, 0);
+            } else {
+                gl.glVertexAttribPointer(attribute);
+            }
         }
     }
-    
+
     /**
      * Reset all previously enabled mapped vertex attribute data.
-     * 
-     * <p>Attribute data is bound to the GL state</p>
-     * <p>Attribute location is bound to the program</p>
-     * 
-     * <p>However, since binding an attribute to a location via {@link #bindAttribLocation(GL2ES2, int, GLArrayData)}
-     * <i>must</i> happen before linking <b>and</b> we try to promote the attributes to the new program,
-     * we have to gather the probably new location etc.</p>
+     *
+     * <p>
+     * Attribute data is bound to the GL state, i.e. VBO data itself will not be updated.
+     * </p>
+     *
+     * <p>
+     * Attribute location and it's data assignment is bound to the program,
+     * hence both are updated.
+     * </p>
+     *
+     * <p>
+     * Note: Such update could only be prevented,
+     * if tracking am attribute/program dirty flag.
+     * </p>
      *
      * @throws GLException is the program is not linked
      *
@@ -763,9 +764,9 @@ public class ShaderState {
     private final void resetAllAttributes(GL2ES2 gl) {
         if(!shaderProgram.linked()) throw new GLException("Program is not linked");
         activeAttribLocationMap.clear();
-        
-        for(Iterator<GLArrayData> iter = managedAttributes.iterator(); iter.hasNext(); ) {
-            iter.next().setLocation(-1);
+
+        for(int i=0; i<managedAttributes.size(); i++) {
+            ((GLArrayData)managedAttributes.get(i)).setLocation(-1);
         }
         for(Iterator<GLArrayData> iter = activeAttribDataMap.values().iterator(); iter.hasNext(); ) {
             relocateAttribute(gl, iter.next());
@@ -778,21 +779,23 @@ public class ShaderState {
         final int loc = attribute.getLocation();
 
         if(0<=loc) {
-            this.bindAttribLocation(gl, loc, name);
-            
+            bindAttribLocation(gl, loc, name);
+
             if(isVertexAttribArrayEnabled(name)) {
                 // enable attrib, VBO and pass location/data
                 gl.glEnableVertexAttribArray(loc);
             }
-    
+
             if( attribute.isVBO() ) {
                 gl.glBindBuffer(GL.GL_ARRAY_BUFFER, attribute.getVBOName());
-            } 
-    
-            gl.glVertexAttribPointer(attribute);
+                gl.glVertexAttribPointer(attribute);
+                gl.glBindBuffer(GL.GL_ARRAY_BUFFER, 0);
+            } else {
+                gl.glVertexAttribPointer(attribute);
+            }
         }
     }
-    
+
     /**
      * preserves the attribute location .. (program not linked)
      */
@@ -809,7 +812,7 @@ public class ShaderState {
     /**
      * Gets the cached location of the shader uniform.
      *
-     * @return -1 if there is no such uniform available, 
+     * @return -1 if there is no such uniform available,
      *         otherwise >= 0
      */
     public final int getCachedUniformLocation(String name) {
@@ -819,38 +822,38 @@ public class ShaderState {
 
     /**
      * Bind the {@link GLUniform} lifecycle to this ShaderState.
-     *  
+     *
      * <p>If a uniform location is cached it is promoted to the {@link GLUniformData} instance.</p>
-     * 
-     * <p>The attribute will be destroyed with {@link #destroy(GL2ES2)} 
+     *
+     * <p>The attribute will be destroyed with {@link #destroy(GL2ES2)}
      * and it's location will be reset when switching shader with {@link #attachShaderProgram(GL2ES2, ShaderProgram)}.</p>
-     *  
+     *
      * <p>The data will not be transfered to the GPU, use {@link #uniform(GL2ES2, GLUniformData)} additionally.</p>
-     * 
+     *
      * @param uniform the {@link GLUniformData} which lifecycle shall be managed
-     * 
+     *
      * @see #getUniform(String)
      */
     public void ownUniform(GLUniformData uniform) {
         final int location = getCachedUniformLocation(uniform.getName());
         if(0<=location) {
             uniform.setLocation(location);
-        }        
+        }
         activeUniformDataMap.put(uniform.getName(), uniform);
-        managedUniforms.add(uniform);        
+        managedUniforms.add(uniform);
     }
-    
+
     public boolean ownsUniform(GLUniformData uniform) {
         return managedUniforms.contains(uniform);
     }
-    
+
     /**
-     * Gets the location of a shader uniform.<br>
+     * Gets the location of a shader uniform with given <code>name</code>.<br>
      * Uses either the cached value {@link #getCachedUniformLocation(String)} if valid,
      * or the GLSL queried via {@link GL2ES2#glGetUniformLocation(int, String)}.<br>
      * The location will be cached.
      * <p>
-     * The current shader program ({@link #attachShaderProgram(GL2ES2, ShaderProgram)}) 
+     * The current shader program ({@link #attachShaderProgram(GL2ES2, ShaderProgram)})
      * must be in use ({@link #useProgram(GL2ES2, boolean) }) !</p>
      *
      * @return -1 if there is no such attribute available,
@@ -867,13 +870,16 @@ public class ShaderState {
         if(!shaderProgram.inUse()) throw new GLException("Program is not in use");
         int location = getCachedUniformLocation(name);
         if(0>location) {
+            if(!shaderProgram.linked()) throw new GLException("Program is not linked");
             location = gl.glGetUniformLocation(shaderProgram.program(), name);
             if(0<=location) {
                 Integer idx = new Integer(location);
                 activeUniformLocationMap.put(name, idx);
             } else if(verbose) {
-                Throwable tX = new Throwable("Info: glUniform failed, no location for: "+name+", index: "+location);
-                tX.printStackTrace();
+                System.err.println("ShaderState: glUniform failed, no location for: "+name+", index: "+location);
+                if(DEBUG) {
+                    Thread.dumpStack();
+                }
             }
         }
         return location;
@@ -883,10 +889,10 @@ public class ShaderState {
      * Validates and returns the location of a shader uniform.<br>
      * Uses either the cached value {@link #getCachedUniformLocation(String)} if valid,
      * or the GLSL queried via {@link GL2ES2#glGetUniformLocation(int, String)}.<br>
-     * The location will be cached and set in the  
+     * The location will be cached and set in the
      * {@link GLUniformData} object.
      * <p>
-     * The current shader program ({@link #attachShaderProgram(GL2ES2, ShaderProgram)}) 
+     * The current shader program ({@link #attachShaderProgram(GL2ES2, ShaderProgram)})
      * must be in use ({@link #useProgram(GL2ES2, boolean) }) !</p>
      *
      * @return -1 if there is no such attribute available,
@@ -900,26 +906,36 @@ public class ShaderState {
      * @see ShaderProgram#glReplaceShader
      */
     public int getUniformLocation(GL2ES2 gl, GLUniformData data) {
-        int location = getUniformLocation(gl, data.getName());
-        data.setLocation(location);
-        activeUniformDataMap.put(data.getName(), data);        
+        if(!shaderProgram.inUse()) throw new GLException("Program is not in use");
+        final String name = data.getName();
+        int location = getCachedUniformLocation(name);
+        if(0<=location) {
+            data.setLocation(location);
+        } else {
+            if(!shaderProgram.linked()) throw new GLException("Program is not linked");
+            location = data.setLocation(gl, shaderProgram.program());
+            if(0<=location) {
+                activeUniformLocationMap.put(name, new Integer(location));
+            } else if(verbose) {
+                System.err.println("ShaderState: glUniform failed, no location for: "+name+", index: "+location);
+                if(DEBUG) {
+                    Thread.dumpStack();
+                }
+            }
+        }
+        activeUniformDataMap.put(name, data);
         return location;
     }
-    
+
     /**
-     * Set the uniform data.
-     *
-     * Even if the uniform is not found in the current shader,
-     * it is stored in this state.
-     *
-     * @param data the GLUniforms's name must match the uniform one,
-     *      it's index will be set with the uniforms's location,
-     *      if found.
-     *
-     *
-     * @return false, if the name is not found, otherwise true
+     * Set the uniform data, if it's location is valid, i.e. &ge; 0.
+     * <p>
+     * This method uses the {@link GLUniformData}'s location if valid, i.e. &ge; 0.<br/>
+     * If data's location is invalid, it will be retrieved via {@link #getUniformLocation(GL2ES2, GLUniformData)},
+     * set and cached in this state.
+     * </p>
      *
-     * @throws GLException if the program is not in use
+     * @return false, if the location could not be determined, otherwise true
      *
      * @see #glGetUniformLocation
      * @see javax.media.opengl.GL2ES2#glGetUniformLocation
@@ -936,11 +952,12 @@ public class ShaderState {
         if(0<=location) {
             // only pass the data, if the uniform exists in the current shader
             if(DEBUG) {
-                System.err.println("Info: glUniform: "+data);
+                System.err.println("ShaderState: glUniform: "+data);
             }
             gl.glUniform(data);
+            return true;
         }
-        return true;
+        return false;
     }
 
     /**
@@ -961,37 +978,49 @@ public class ShaderState {
         activeUniformLocationMap.clear();
         managedUniforms.clear();
     }
-        
+
     /**
      * Reset all previously mapped uniform data
-     * 
+     * <p>
      * Uniform data and location is bound to the program,
-     * hence both are updated here
+     * hence both are updated.
+     * </p>
+     * <p>
+     * Note: Such update could only be prevented,
+     * if tracking a uniform/program dirty flag.
+     * </p>
      *
      * @throws GLException is the program is not in use
-     * 
+     *
      * @see #attachShaderProgram(GL2ES2, ShaderProgram)
      */
     private final void resetAllUniforms(GL2ES2 gl) {
-        if(!shaderProgram.inUse()) throw new GLException("Program is not in use");        
+        if(!shaderProgram.inUse()) throw new GLException("Program is not in use");
         activeUniformLocationMap.clear();
         for(Iterator<GLUniformData> iter = managedUniforms.iterator(); iter.hasNext(); ) {
             iter.next().setLocation(-1);
-        }        
+        }
         for(Iterator<GLUniformData> iter = activeUniformDataMap.values().iterator(); iter.hasNext(); ) {
-            final GLUniformData uniform = iter.next();
-            uniform.setLocation(-1);
-            uniform(gl, uniform);
+            final GLUniformData data = iter.next();
+            final int loc = data.setLocation(gl, shaderProgram.program());
+            if( 0 <= loc ) {
+                // only pass the data, if the uniform exists in the current shader
+                activeUniformLocationMap.put(data.getName(), new Integer(loc));
+                if(DEBUG) {
+                    System.err.println("ShaderState: resetAllUniforms: "+data);
+                }
+                gl.glUniform(data);
+            }
         }
     }
 
-    public StringBuilder toString(StringBuilder sb) {
+    public StringBuilder toString(StringBuilder sb, boolean alsoUnlocated) {
         if(null==sb) {
             sb = new StringBuilder();
         }
-        
+
         sb.append("ShaderState[ ");
-        
+
         sb.append(Platform.getNewline()).append(" ");
         if(null != shaderProgram) {
             shaderProgram.toString(sb);
@@ -1008,43 +1037,54 @@ public class ShaderState {
         }
         sb.append(Platform.getNewline()).append(" ],").append(" activeAttributes [");
         for(Iterator<GLArrayData> iter = activeAttribDataMap.values().iterator(); iter.hasNext(); ) {
-            sb.append(Platform.getNewline()).append("  ").append(iter.next());
+            final GLArrayData ad = iter.next();
+            if( alsoUnlocated || 0 <= ad.getLocation() ) {
+                sb.append(Platform.getNewline()).append("  ").append(ad);
+            }
         }
         sb.append(Platform.getNewline()).append(" ],").append(" managedAttributes [");
         for(Iterator<GLArrayData> iter = managedAttributes.iterator(); iter.hasNext(); ) {
-            sb.append(Platform.getNewline()).append("  ").append(iter.next());
+            final GLArrayData ad = iter.next();
+            if( alsoUnlocated || 0 <= ad.getLocation() ) {
+                sb.append(Platform.getNewline()).append("  ").append(ad);
+            }
         }
         sb.append(Platform.getNewline()).append(" ],").append(" activeUniforms [");
         for(Iterator<GLUniformData> iter=activeUniformDataMap.values().iterator(); iter.hasNext(); ) {
-            sb.append(Platform.getNewline()).append("  ").append(iter.next());
+            final GLUniformData ud = iter.next();
+            if( alsoUnlocated || 0 <= ud.getLocation() ) {
+                sb.append(Platform.getNewline()).append("  ").append(ud);
+            }
         }
         sb.append(Platform.getNewline()).append(" ],").append(" managedUniforms [");
         for(Iterator<GLUniformData> iter = managedUniforms.iterator(); iter.hasNext(); ) {
-            sb.append(Platform.getNewline()).append("  ").append(iter.next());
+            final GLUniformData ud = iter.next();
+            if( alsoUnlocated || 0 <= ud.getLocation() ) {
+                sb.append(Platform.getNewline()).append("  ").append(ud);
+            }
         }
         sb.append(Platform.getNewline()).append(" ]").append(Platform.getNewline()).append("]");
         return sb;
     }
-    
+
     @Override
     public String toString() {
-        return toString(null).toString();
+        return toString(null, DEBUG).toString();
     }
-    
-    private boolean verbose = DEBUG ? true : false;
+
+    private boolean verbose = DEBUG;
     private ShaderProgram shaderProgram=null;
-    
+
     private HashMap<String, Boolean> activedAttribEnabledMap = new HashMap<String, Boolean>();
     private HashMap<String, Integer> activeAttribLocationMap = new HashMap<String, Integer>();
     private HashMap<String, GLArrayData> activeAttribDataMap = new HashMap<String, GLArrayData>();
     private ArrayList<GLArrayData> managedAttributes = new ArrayList<GLArrayData>();
-    
+
     private HashMap<String, Integer> activeUniformLocationMap = new HashMap<String, Integer>();
     private HashMap<String, GLUniformData> activeUniformDataMap = new HashMap<String, GLUniformData>();
     private ArrayList<GLUniformData> managedUniforms = new ArrayList<GLUniformData>();
-    
-    private HashMap<String, Object> attachedObjectsByString = new HashMap<String, Object>();    
-    private IntObjectHashMap attachedObjectsByInt = new IntObjectHashMap();   
+
+    private HashMap<String, Object> attachedObjectsByString = new HashMap<String, Object>();
     private boolean resetAllShaderData = false;
 }
 
diff --git a/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderUtil.java b/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderUtil.java
index 40c052498..5cd384c58 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderUtil.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderUtil.java
@@ -1,21 +1,21 @@
 /*
  * Copyright (c) 2009 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
@@ -28,7 +28,7 @@
  * 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.
- * 
+ *
  */
 
 package com.jogamp.opengl.util.glsl;
@@ -40,6 +40,7 @@ import java.util.*;
 import javax.media.opengl.*;
 
 import com.jogamp.common.nio.Buffers;
+import com.jogamp.opengl.GLExtensions;
 
 public class ShaderUtil {
     public static String getShaderInfoLog(GL _gl, int shaderObj) {
@@ -116,11 +117,11 @@ public class ShaderUtil {
         }
         return true;
     }
-    
+
     /**
      * Performs {@link GL2ES2#glValidateProgram(int)}
      * <p>
-     * One shall only call this method while debugging and only if all required 
+     * One shall only call this method while debugging and only if all required
      * resources by the shader are set.
      * </p>
      * <p>
@@ -149,7 +150,7 @@ public class ShaderUtil {
     }
 
     /**
-     * If supported, queries the natively supported shader binary formats using 
+     * If supported, queries the natively supported shader binary formats using
      * {@link GL2ES2#GL_NUM_SHADER_BINARY_FORMATS} and {@link GL2ES2#GL_SHADER_BINARY_FORMATS}
      * via {@link GL2ES2#glGetIntegerv(int, int[], int)}.
      */
@@ -159,15 +160,21 @@ public class ShaderUtil {
         if(null == info.shaderBinaryFormats) {
             info.shaderBinaryFormats = new HashSet<Integer>();
             if (gl.isGLES2Compatible()) {
-                final int[] param = new int[1];
-                gl.glGetIntegerv(GL2ES2.GL_NUM_SHADER_BINARY_FORMATS, param, 0);
-                int numFormats = param[0];
-                if(numFormats>0) {
-                    int[] formats = new int[numFormats];
-                    gl.glGetIntegerv(GL2ES2.GL_SHADER_BINARY_FORMATS, formats, 0);
-                    for(int i=0; i<numFormats; i++) {
-                        info.shaderBinaryFormats.add(new Integer(formats[i]));
+                try {
+                    final int[] param = new int[1];
+                    gl.glGetIntegerv(GL2ES2.GL_NUM_SHADER_BINARY_FORMATS, param, 0);
+                    final int err = gl.glGetError();
+                    final int numFormats = GL.GL_NO_ERROR == err ? param[0] : 0;
+                    if(numFormats>0) {
+                        int[] formats = new int[numFormats];
+                        gl.glGetIntegerv(GL2ES2.GL_SHADER_BINARY_FORMATS, formats, 0);
+                        for(int i=0; i<numFormats; i++) {
+                            info.shaderBinaryFormats.add(new Integer(formats[i]));
+                        }
                     }
+                } catch (GLException gle) {
+                    System.err.println("Catched Exception on thread "+Thread.currentThread().getName());
+                    gle.printStackTrace();
                 }
             }
         }
@@ -180,17 +187,28 @@ public class ShaderUtil {
         final ProfileInformation info = getProfileInformation(gl);
         if(null==info.shaderCompilerAvailable) {
             if(gl.isGLES2()) {
-                final byte[] param = new byte[1];
-                gl.glGetBooleanv(GL2ES2.GL_SHADER_COMPILER, param, 0);
-                boolean v = param[0]!=(byte)0x00;
-                if(!v) {
-                    final Set<Integer> bfs = getShaderBinaryFormats(gl);
-                    if(bfs.size()==0) {
-                        // no supported binary formats, hence a compiler must be available!
-                        v = true;
+                boolean queryOK = false;
+                try {
+                    final byte[] param = new byte[1];
+                    gl.glGetBooleanv(GL2ES2.GL_SHADER_COMPILER, param, 0);
+                    final int err = gl.glGetError();
+                    boolean v = GL.GL_NO_ERROR == err && param[0]!=(byte)0x00;
+                    if(!v) {
+                        final Set<Integer> bfs = getShaderBinaryFormats(gl);
+                        if(bfs.size()==0) {
+                            // no supported binary formats, hence a compiler must be available!
+                            v = true;
+                        }
                     }
+                    info.shaderCompilerAvailable = new Boolean(v);
+                    queryOK = true;
+                } catch (GLException gle) {
+                    System.err.println("Catched Exception on thread "+Thread.currentThread().getName());
+                    gle.printStackTrace();
+                }
+                if(!queryOK) {
+                    info.shaderCompilerAvailable = new Boolean(true);
                 }
-                info.shaderCompilerAvailable = new Boolean(v);
             } else if( gl.isGL2ES2() ) {
                 info.shaderCompilerAvailable = new Boolean(true);
             } else {
@@ -200,6 +218,13 @@ public class ShaderUtil {
         return info.shaderCompilerAvailable.booleanValue();
     }
 
+    /** Returns true if GeometryShader is supported, i.e. whether GLContext is &ge; 3.2 or ARB_geometry_shader4 extension is available. */
+    public static boolean isGeometryShaderSupported(GL _gl) {
+      final GLContext ctx = _gl.getContext();
+      return ctx.getGLVersionNumber().compareTo(GLContext.Version320) >= 0 ||
+             ctx.isExtensionAvailable(GLExtensions.ARB_geometry_shader4);
+    }
+
     public static void shaderSource(GL _gl, int shader, CharSequence[] source)
     {
         final GL2ES2 gl = _gl.getGL2ES2();
@@ -215,7 +240,7 @@ public class ShaderUtil {
         IntBuffer lengths = Buffers.newDirectIntBuffer(count);
         for(int i=0; i<count; i++) {
             lengths.put(i, source[i].length());
-        }        
+        }
         if(source instanceof String[]) {
             // rare case ..
             gl.glShaderSource(shader, count, (String[])source, lengths);
@@ -224,10 +249,10 @@ public class ShaderUtil {
             for(int i = source.length - 1; i>=0; i--) {
                 final CharSequence csq = source[i];
                 if(csq instanceof String) {
-                    // if ShaderCode.create(.. mutableStringBuffer == false )
+                    // if ShaderCode.create(.. mutableStringBuilder == false )
                     tmp[i] = (String) csq;
                 } else {
-                    // if ShaderCode.create(.. mutableStringBuffer == true )
+                    // if ShaderCode.create(.. mutableStringBuilder == true )
                     tmp[i] = source[i].toString();
                 }
             }
@@ -313,7 +338,7 @@ public class ShaderUtil {
         }
 
         createShader(gl, shaderType, shader);
-        err = gl.glGetError(); 
+        err = gl.glGetError();
         if(err!=GL.GL_NO_ERROR) {
             throw new GLException("createAndLoadShader: CreateShader failed, GL Error: 0x"+Integer.toHexString(err));
         }
@@ -328,7 +353,7 @@ public class ShaderUtil {
     }
 
     public static boolean createAndCompileShader(GL _gl, IntBuffer shader, int shaderType,
-                                                 CharSequence[][] sources, 
+                                                 CharSequence[][] sources,
                                                  PrintStream verboseOut)
     {
         final GL2ES2 gl = _gl.getGL2ES2();
@@ -338,32 +363,32 @@ public class ShaderUtil {
         }
 
         createShader(gl, shaderType, shader);
-        err = gl.glGetError(); 
+        err = gl.glGetError();
         if(err!=GL.GL_NO_ERROR) {
             throw new GLException("createAndCompileShader: CreateShader failed, GL Error: 0x"+Integer.toHexString(err));
         }
 
         shaderSource(gl, shader, sources);
-        err = gl.glGetError(); 
+        err = gl.glGetError();
         if(err!=GL.GL_NO_ERROR) {
             throw new GLException("createAndCompileShader: ShaderSource failed, GL Error: 0x"+Integer.toHexString(err));
         }
 
         compileShader(gl, shader);
-        err = gl.glGetError(); 
+        err = gl.glGetError();
         if(err!=GL.GL_NO_ERROR && null!=verboseOut) {
             verboseOut.println("createAndCompileShader: CompileShader failed, GL Error: 0x"+Integer.toHexString(err));
         }
 
         return isShaderStatusValid(gl, shader, GL2ES2.GL_COMPILE_STATUS, verboseOut) && err == GL.GL_NO_ERROR;
     }
-    
+
     private static final String implObjectKey = "com.jogamp.opengl.util.glsl.ShaderUtil" ;
-    
+
     private static class ProfileInformation {
         Boolean shaderCompilerAvailable = null;
         Set<Integer> shaderBinaryFormats = null;
-    }    
+    }
 
     private static ProfileInformation getProfileInformation(GL gl) {
         final GLContext context = gl.getContext();
diff --git a/src/jogl/classes/com/jogamp/opengl/util/glsl/fixedfunc/FixedFuncUtil.java b/src/jogl/classes/com/jogamp/opengl/util/glsl/fixedfunc/FixedFuncUtil.java
index d92a7aa22..2f8884a3a 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/glsl/fixedfunc/FixedFuncUtil.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/glsl/fixedfunc/FixedFuncUtil.java
@@ -4,26 +4,45 @@
 
 package com.jogamp.opengl.util.glsl.fixedfunc;
 
-import javax.media.opengl.*;
-import javax.media.opengl.fixedfunc.*;
+import javax.media.opengl.GL;
+import javax.media.opengl.GL2ES1;
+import javax.media.opengl.GL2ES2;
+import javax.media.opengl.GLContext;
+import javax.media.opengl.GLException;
+import javax.media.opengl.fixedfunc.GLPointerFuncUtil;
+
+import jogamp.opengl.util.glsl.fixedfunc.FixedFuncHook;
+import jogamp.opengl.util.glsl.fixedfunc.FixedFuncImpl;
+import jogamp.opengl.util.glsl.fixedfunc.FixedFuncPipeline;
+
+import com.jogamp.opengl.util.PMVMatrix;
 
-import jogamp.opengl.util.glsl.fixedfunc.*;
 
 /**
  * Tool to pipeline GL2ES2 into a fixed function emulation implementing GL2ES1.
  */
 public class FixedFuncUtil {
     /**
+     * @param gl
+     * @param mode one of the {@link ShaderSelectionMode}s
+     * @param pmvMatrix optional pass through PMVMatrix for the {@link FixedFuncHook} and {@link FixedFuncPipeline}
      * @return If gl is a GL2ES1 and force is false, return the type cast object,
      *         otherwise create a fixed function emulation pipeline using the given GL2ES2 impl
      *         and hook it to the GLContext via {@link GLContext#setGL(GL)}.
      * @throws GLException if the GL object is neither GL2ES1 nor GL2ES2
+     *
+     * @see ShaderSelectionMode#AUTO
+     * @see ShaderSelectionMode#COLOR
+     * @see ShaderSelectionMode#COLOR_LIGHT_PER_VERTEX
+     * @see ShaderSelectionMode#COLOR_TEXTURE
+     * @see ShaderSelectionMode#COLOR_TEXTURE_LIGHT_PER_VERTEX
      */
-    public static final GL2ES1 wrapFixedFuncEmul(GL gl, boolean force) {
+    public static final GL2ES1 wrapFixedFuncEmul(GL gl, ShaderSelectionMode mode, PMVMatrix pmvMatrix, boolean force, boolean verbose) {
         if(gl.isGL2ES2() && ( !gl.isGL2ES1() || force ) ) {
-            GL2ES2 es2 = gl.getGL2ES2();
-            FixedFuncHook hook = new FixedFuncHook(es2);
-            FixedFuncImpl impl = new FixedFuncImpl(es2, hook);
+            final GL2ES2 es2 = gl.getGL2ES2();
+            final FixedFuncHook hook = new FixedFuncHook(es2, mode, pmvMatrix);
+            hook.setVerbose(verbose);
+            final FixedFuncImpl impl = new FixedFuncImpl(es2, hook);
             gl.getContext().setGL(impl);
             return impl;
         } else if(gl.isGL2ES1()) {
@@ -33,21 +52,30 @@ public class FixedFuncUtil {
     }
 
     /**
+     * @param gl
+     * @param mode one of the {@link ShaderSelectionMode}s
+     * @param pmvMatrix optional pass through PMVMatrix for the {@link FixedFuncHook} and {@link FixedFuncPipeline}
      * @return If gl is a GL2ES1, return the type cast object,
      *         otherwise create a fixed function emulation pipeline using the GL2ES2 impl.
      *         and hook it to the GLContext via {@link GLContext#setGL(GL)}.
      * @throws GLException if the GL object is neither GL2ES1 nor GL2ES2
+     *
+     * @see ShaderSelectionMode#AUTO
+     * @see ShaderSelectionMode#COLOR
+     * @see ShaderSelectionMode#COLOR_LIGHT_PER_VERTEX
+     * @see ShaderSelectionMode#COLOR_TEXTURE
+     * @see ShaderSelectionMode#COLOR_TEXTURE_LIGHT_PER_VERTEX
      */
-    public static final GL2ES1 wrapFixedFuncEmul(GL gl) {
-        return wrapFixedFuncEmul(gl, false);
+    public static final GL2ES1 wrapFixedFuncEmul(GL gl, ShaderSelectionMode mode, PMVMatrix pmvMatrix) {
+        return wrapFixedFuncEmul(gl, mode, null, false, false);
     }
 
     /**
-     * Mapping fixed function (client) array indices to 
+     * Mapping fixed function (client) array indices to
      * GLSL array attribute names.
      *
      * Useful for uniq mapping of canonical array index names as listed.
-     * 
+     *
      * @see #mgl_Vertex
      * @see javax.media.opengl.fixedfunc.GLPointerFunc#GL_VERTEX_ARRAY
      * @see #mgl_Normal
diff --git a/src/jogl/classes/com/jogamp/opengl/util/glsl/fixedfunc/ShaderSelectionMode.java b/src/jogl/classes/com/jogamp/opengl/util/glsl/fixedfunc/ShaderSelectionMode.java
new file mode 100644
index 000000000..426fb0d85
--- /dev/null
+++ b/src/jogl/classes/com/jogamp/opengl/util/glsl/fixedfunc/ShaderSelectionMode.java
@@ -0,0 +1,27 @@
+package com.jogamp.opengl.util.glsl.fixedfunc;
+
+/**
+ * Shader selection mode
+ *
+ * @see ShaderSelectionMode#AUTO
+ * @see ShaderSelectionMode#COLOR
+ * @see ShaderSelectionMode#COLOR_LIGHT_PER_VERTEX
+ * @see ShaderSelectionMode#COLOR_TEXTURE
+ * @see ShaderSelectionMode#COLOR_TEXTURE_LIGHT_PER_VERTEX
+ */
+public enum ShaderSelectionMode {
+    /** Auto shader selection, based upon FFP states. */
+    AUTO,
+    /** Fixed shader selection: Simple color. */
+    COLOR,
+    /** Fixed shader selection: Multi-Textured color. 2 texture units. */
+    COLOR_TEXTURE2,
+    /** Fixed shader selection: Multi-Textured color. 4 texture units. */
+    COLOR_TEXTURE4,
+    /** Fixed shader selection: Multi-Textured color. 8 texture units. */
+    COLOR_TEXTURE8,
+    /** Fixed shader selection: Color with vertex-lighting. */
+    COLOR_LIGHT_PER_VERTEX,
+    /** Fixed shader selection: Multi-Textured color with vertex-lighting. 8 texture units.*/
+    COLOR_TEXTURE8_LIGHT_PER_VERTEX
+}
\ No newline at end of file
diff --git a/src/jogl/classes/com/jogamp/opengl/util/glsl/sdk/CompileShader.java b/src/jogl/classes/com/jogamp/opengl/util/glsl/sdk/CompileShader.java
index a5b1c6687..44fbf1c6d 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/glsl/sdk/CompileShader.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/glsl/sdk/CompileShader.java
@@ -55,8 +55,8 @@ public abstract class CompileShader {
         URL resourceURL = IOUtil.getResource(null, resourceName).getURL();
         String dirName = dirname(resourceURL.getPath());
 
-        outName = dirName + File.separator + "bin" + File.separator + 
-                  ShaderCode.getBinarySubPath(getBinaryFormat()) + File.separator + 
+        outName = dirName + File.separator + "bin" + File.separator +
+                  ShaderCode.getBinarySubPath(getBinaryFormat()) + File.separator +
                   outName;
         processOneShader(resourceName, outName, type);
     }
@@ -137,7 +137,7 @@ public abstract class CompileShader {
         }
         String dirname;
         if (lastSlash < 0) {
-            dirname = new String();
+            dirname = "";
         } else {
             dirname = path.substring(0, lastSlash + 1);
         }
@@ -161,6 +161,7 @@ public abstract class CompileShader {
             new Thread(this, "Output Reader Thread").start();
         }
 
+        @Override
         public void run()
         {
             byte[] buffer = new byte[4096];
diff --git a/src/jogl/classes/com/jogamp/opengl/util/glsl/sdk/CompileShaderNVidia.java b/src/jogl/classes/com/jogamp/opengl/util/glsl/sdk/CompileShaderNVidia.java
index 8eb9ef579..215cf592b 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/glsl/sdk/CompileShaderNVidia.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/glsl/sdk/CompileShaderNVidia.java
@@ -21,10 +21,12 @@ public class CompileShaderNVidia extends CompileShader {
         }
     }
 
+    @Override
     public int getBinaryFormat() {
         return GLES2.GL_NVIDIA_PLATFORM_BINARY_NV;
     }
 
+    @Override
     public File getSDKCompilerDir() {
         File compilerDir = new File( NVAPSDK + File.separator + "tools" + File.separator );
         File compilerFile = new File( compilerDir, getVertexShaderCompiler());
@@ -39,10 +41,12 @@ public class CompileShaderNVidia extends CompileShader {
         return compilerDir;
     }
 
+    @Override
     public String getVertexShaderCompiler() {
         return "glslv.bat";
     }
 
+    @Override
     public String getFragmentShaderCompiler() {
         return "glslf.bat";
     }