Graph/GraphUI: Revise Graph Region ShaderMapping, fix AABBox-Clipping for Pass2-AA, revise Pass2 AA Quality parameter ..

Misc:
- Graph VBORegion2PVBAAES2: Drop unused FBO rescale
- Move MIN/MAX QUALITY/SAMPLE from GraphUI Scene -> Graph Region

+++

Quality -> Pass2 AA Quality
- Drop quality field in region
- Pass quality to GLRegion.draw(..) similar to sampleCount
  for dynamic shader and switch
- TODO: Pass quality parameter in TextRegionUtil's functions

Fix RegionRenderer Shader Mapping
- Use ShaderKey class to properly implement the hash value and equals method
- For this, TextureSequence.getTextureFragmentShaderHashID() has been added
  to provide actual shader-snippet for the equals function
- All required criterias are included in the hash value and equals method

Fix AABBox Clipping for Pass-2 AA
- Clipping in pass2-AA must happen in pass2 on actual gcu_PMVMatrix01 (not ortho)

+++

GraphUI GraphShape
- Rename: [get,set]{->AA}Quality()

GraphUI Scene
- Rename: mark{All->}ShapesDirty(), set{AllShapes->}Sharpness(), set{AllShapes->AA}Quality()
- Fix setSampleCount(..), i.e. markStatesDirty() not markShapesDirty()
- Fix setAAQuality(), markShapesDirty() and markStatesDirty(): Use forAll(..) to traverse through all shapes and groups.

GraphUI Group
- Add setFixedSize()
- Add setClipOnBox()
- Document setRelayoutOnDirtyShapes(), isShapeDirty()

19 files changed, 481 insertions, 327 deletions

diff --git a/src/jogl/classes/com/jogamp/graph/curve/Region.java b/src/jogl/classes/com/jogamp/graph/curve/Region.java
index 5b0f0a53b..f70dacbbc 100644
--- a/src/jogl/classes/com/jogamp/graph/curve/Region.java
+++ b/src/jogl/classes/com/jogamp/graph/curve/Region.java
@@ -72,6 +72,9 @@ public abstract class Region {
      * <p>
      * One pass `norm` rendering either using no AA or underlying full-screen AA (fsaa).
      * </p>
+     * <p>
+     * This mode-bit is a shader-key.
+     * </p>
      */
     public static final int NORM_RENDERING_BIT        = 0;
 
@@ -79,9 +82,15 @@ public abstract class Region {
      * Rendering-Mode bit for {@link #getRenderModes() Region}
      * <p>
      * MSAA based Anti-Aliasing, a two pass region rendering, slower and more
-     * resource hungry (FBO), but providing fast MSAA in case
+     * resource hungry (FBO with sample buffer), but providing fast MSAA in case
      * the whole scene is not rendered with MSAA.
      * </p>
+     * <p>
+     * In case sample count is 1, no FBO sample buffer is used but a simple bilinear texture filter.
+     * </p>
+     * <p>
+     * This mode-bit is a shader-key.
+     * </p>
      */
     public static final int MSAA_RENDERING_BIT        = 1 <<  0;
 
@@ -92,6 +101,16 @@ public abstract class Region {
      * resource hungry (FBO), but AA is perfect. Otherwise the default fast one
      * pass MSAA region rendering is being used.
      * </p>
+     * <p>
+     * In case sample count is 1, no FBO supersampling is performed but a simple bilinear texture filter used.
+     * </p>
+     * <p>
+     * Depending on AA-quality, {@link #MAX_AA_QUALITY} denotes full 4x billinear filtering per sample
+     * and {@code 0} denotes 1x flipquad filtering per sample.
+     * </p>
+     * <p>
+     * This mode-bit is a shader-key.
+     * </p>
      */
     public static final int VBAA_RENDERING_BIT        = 1 <<  1;
 
@@ -105,6 +124,9 @@ public abstract class Region {
      * Otherwise the default weight 1.0 for uniform curve region rendering is
      * being applied.
      * </p>
+     * <p>
+     * This mode-bit is a shader-key.
+     * </p>
      */
     public static final int VARWEIGHT_RENDERING_BIT    = 1 <<  8;
 
@@ -115,6 +137,9 @@ public abstract class Region {
      * otherwise {@link com.jogamp.graph.curve.opengl.RegionRenderer#setColorStatic(com.jogamp.opengl.GL2ES2, float, float, float, float) static color}
      * can being used for a monotonic color.
      * </p>
+     * <p>
+     * This mode-bit is a shader-key.
+     * </p>
      * @see #getRenderModes()
      * @see #hasColorChannel()
      * @see #addOutlineShape(OutlineShape, AffineTransform, float[])
@@ -127,6 +152,9 @@ public abstract class Region {
      * <p>
      * If set, a color texture is used to determine the color.
      * </p>
+     * <p>
+     * This mode-bit is a shader-key.
+     * </p>
      * @see #COLORTEXTURE_LETTERBOX_RENDERING_BIT
      */
     public static final int COLORTEXTURE_RENDERING_BIT = 1 <<  10;
@@ -137,13 +165,23 @@ public abstract class Region {
      * If set, a used {@link #COLORTEXTURE_RENDERING_BIT} color texture is added letter-box space to match aspect-ratio, otherwise it will be zoomed in.
      * </p>
      * <p>
+     * This mode-bit is not a shader-key.
+     * </p>
+     * <p>
      * Note that {@link #COLORTEXTURE_RENDERING_BIT} must also be set to even enable color texture.
      * </p>
      */
     public static final int COLORTEXTURE_LETTERBOX_RENDERING_BIT = 1 <<  11;
 
-    /** Default maximum {@link #getQuality() quality}, {@value}. */
-    public static final int MAX_QUALITY  = 1;
+    /** Minimum pass2 AA-quality rendering {@value} (default) for Graph Region AA {@link Region#getRenderModes() render-modes}: {@link #VBAA_RENDERING_BIT}. */
+    public static final int MIN_AA_QUALITY  = 0;
+    /** Maximum pass2 AA-quality rendering {@value} (default) for Graph Region AA {@link Region#getRenderModes() render-modes}: {@link #VBAA_RENDERING_BIT}. */
+    public static final int MAX_AA_QUALITY  = 1;
+
+    /** Minimum pass2 AA sample count {@value} for Graph Region AA {@link Region#getRenderModes() render-modes}: {@link Region#VBAA_RENDERING_BIT} or {@link Region#MSAA_RENDERING_BIT}. */
+    public static final int MIN_AA_SAMPLE_COUNT  = 1;
+    /** Maximum pass2 AA sample count {@value} for Graph Region AA {@link Region#getRenderModes() render-modes}: {@link Region#VBAA_RENDERING_BIT} or {@link Region#MSAA_RENDERING_BIT}. */
+    public static final int MAX_AA_SAMPLE_COUNT  = 8;
 
     public static final int DEFAULT_TWO_PASS_TEXTURE_UNIT = 0;
 
@@ -153,7 +191,6 @@ public abstract class Region {
     private final int renderModes;
     private final boolean use_int32_idx;
     private final int max_indices;
-    private int quality;
     private int dirty = DIRTY_SHAPE | DIRTY_STATE;
     private int numVertices = 0;
     protected final AABBox box = new AABBox();
@@ -265,7 +302,6 @@ public abstract class Region {
         } else {
             this.max_indices = GL_UINT16_MAX;
         }
-        this.quality = MAX_QUALITY;
     }
 
     /** Print implementation buffer stats like detailed and total size and capacity in bytes etc */
@@ -316,12 +352,6 @@ public abstract class Region {
      */
     public final int getRenderModes() { return renderModes; }
 
-    /** See {@link #MAX_QUALITY} */
-    public final int getQuality() { return quality; }
-
-    /** See {@link #MAX_QUALITY} */
-    public final void setQuality(final int q) { quality=q; }
-
     protected final void clearImpl() {
         dirty = DIRTY_SHAPE | DIRTY_STATE;
         numVertices = 0;
@@ -760,7 +790,7 @@ public abstract class Region {
      * Mark this region's shape dirty,
      * i.e. its vertices, triangles, lines and/or color-texture coordinates changed.
      * <p>
-     * The data will be re-uploaded to the GPU at next {@link GLRegion#draw(com.jogamp.opengl.GL2ES2, com.jogamp.graph.curve.opengl.RegionRenderer, int[]) draw(..)}.
+     * The data will be re-uploaded to the GPU at next {@link GLRegion#draw(com.jogamp.opengl.GL2ES2, com.jogamp.graph.curve.opengl.RegionRenderer, int, int[]) draw(..)}.
      * </p>
      * <p>
      * In 2-pass mode, this implies updating the FBO itself as well.
@@ -798,6 +828,6 @@ public abstract class Region {
 
     @Override
     public String toString() {
-        return "Region[0x"+Integer.toHexString(hashCode())+", "+getRenderModeString(this.renderModes)+", q "+quality+", dirty "+dirty+", vertices "+numVertices+", box "+box+"]";
+        return "Region[0x"+Integer.toHexString(hashCode())+", "+getRenderModeString(this.renderModes)+", dirty "+dirty+", vertices "+numVertices+", box "+box+"]";
     }
 }
\ No newline at end of file
diff --git a/src/jogl/classes/com/jogamp/graph/curve/opengl/GLRegion.java b/src/jogl/classes/com/jogamp/graph/curve/opengl/GLRegion.java
index af8a54177..5849a8581 100644
--- a/src/jogl/classes/com/jogamp/graph/curve/opengl/GLRegion.java
+++ b/src/jogl/classes/com/jogamp/graph/curve/opengl/GLRegion.java
@@ -511,14 +511,15 @@ public abstract class GLRegion extends Region {
      * </p>

      * @param gl current {@link GL2ES2}.

      * @param renderer the {@link RegionRenderer} to be used

-     * @param sampleCount desired multisampling sample count for vbaa- or msaa-rendering.

+     * @param pass2Quality pass2 AA-quality selector in the range [{@link Region#MIN_AA_QUALITY}..{@link Region#MAX_AA_QUALITY}] for Graph Region AA {@link Region#getRenderModes() render-modes}: {@link Region#VBAA_RENDERING_BIT}

+     * @param sampleCount desired pass2 AA-multisampling sample count in the typical range [{@link Region#MIN_AA_SAMPLE_COUNT}..{@link Region#MAX_AA_SAMPLE_COUNT}] for Graph Region AA {@link Region#getRenderModes() render-modes}: {@link Region#VBAA_RENDERING_BIT}, {@link Region#MSAA_RENDERING_BIT}

      *        Use -1 for glSelect mode, pass1 w/o any color texture nor channel, use static select color only.

      *        The actual used scample-count is written back when msaa-rendering is enabled, otherwise the store is untouched.

      * @see RegionRenderer#enable(GL2ES2, boolean)

      */

-    public final void draw(final GL2ES2 gl, final RegionRenderer renderer, final int[/*1*/] sampleCount) {

+    public final void draw(final GL2ES2 gl, final RegionRenderer renderer, final int pass2Quality, final int[/*1*/] sampleCount) {

         final int curRenderModes;

-        if( null == sampleCount || 0 == sampleCount[0] ) {

+        if( 0 == sampleCount[0] ) {

             // no sampling, reduce to pass1

             curRenderModes = getRenderModes() & ~( VBAA_RENDERING_BIT | MSAA_RENDERING_BIT );

         } else if( 0 > sampleCount[0] ) {

@@ -528,6 +529,9 @@ public abstract class GLRegion extends Region {
             // normal 2-pass sampling

             curRenderModes = getRenderModes();

         }

+        // System.err.println("XXX.0 "+Region.getRenderModeString(getRenderModes(), sampleCount[0], 0)+": "+

+        //        Region.getRenderModeString(lastRenderModes, sampleCount[0], 0)+" -> "+Region.getRenderModeString(curRenderModes, sampleCount[0], 0));

+

         if( lastRenderModes != curRenderModes ) {

             markShapeDirty();

             markStateDirty();

@@ -535,7 +539,7 @@ public abstract class GLRegion extends Region {
         if( isShapeDirty() ) {

             updateImpl(gl, renderer, curRenderModes);

         }

-        drawImpl(gl, renderer, curRenderModes, sampleCount);

+        drawImpl(gl, renderer, curRenderModes, pass2Quality, sampleCount);

         clearDirtyBits(DIRTY_SHAPE|DIRTY_STATE);

         lastRenderModes = curRenderModes;

     }

@@ -549,5 +553,5 @@ public abstract class GLRegion extends Region {
      */

     protected abstract void updateImpl(final GL2ES2 gl, final RegionRenderer renderer, final int curRenderModes);

 

-    protected abstract void drawImpl(final GL2ES2 gl, final RegionRenderer renderer, final int curRenderModes, final int[/*1*/] sampleCount);

+    protected abstract void drawImpl(final GL2ES2 gl, final RegionRenderer renderer, final int curRenderModes, int pass2Quality, final int[/*1*/] sampleCount);

 }

diff --git a/src/jogl/classes/com/jogamp/graph/curve/opengl/RegionRenderer.java b/src/jogl/classes/com/jogamp/graph/curve/opengl/RegionRenderer.java
index c43dc7913..cf9ac637b 100644
--- a/src/jogl/classes/com/jogamp/graph/curve/opengl/RegionRenderer.java
+++ b/src/jogl/classes/com/jogamp/graph/curve/opengl/RegionRenderer.java
@@ -28,6 +28,7 @@
 package com.jogamp.graph.curve.opengl;
 
 import java.io.IOException;
+import java.util.HashMap;
 import java.util.Iterator;
 
 import com.jogamp.opengl.GL;
@@ -44,7 +45,6 @@ import com.jogamp.opengl.util.glsl.ShaderCode;
 import com.jogamp.opengl.util.glsl.ShaderProgram;
 import com.jogamp.opengl.util.texture.TextureSequence;
 import com.jogamp.common.os.Platform;
-import com.jogamp.common.util.IntObjectHashMap;
 import com.jogamp.graph.curve.Region;
 import com.jogamp.math.Recti;
 import com.jogamp.math.Vec4f;
@@ -67,6 +67,7 @@ public final class RegionRenderer {
     protected static final boolean DEBUG = Region.DEBUG;
     protected static final boolean DEBUG_ALL_EVENT = Region.DEBUG_ALL_EVENT;
     protected static final boolean DEBUG_INSTANCE = Region.DEBUG_INSTANCE;
+    private static final boolean DEBUG_SHADER_MAP = DEBUG;
 
     /**
      * May be passed to
@@ -91,7 +92,7 @@ public final class RegionRenderer {
      * and turning-on the {@link GL#GL_BLEND} state.
      * <p>
      * Implementation also sets {@link RegionRenderer#getRenderState() RenderState}'s {@link RenderState#BITHINT_BLENDING_ENABLED blending bit-hint},
-     * which will cause {@link GLRegion#draw(GL2ES2, RegionRenderer, int[]) GLRegion's draw-method}
+     * which will cause {@link GLRegion#draw(GL2ES2, RegionRenderer, int, int[]) GLRegion's draw-method}
      * to set the proper {@link GL#glBlendFuncSeparate(int, int, int, int) blend-function}
      * and the clear-color to <i>transparent-black</i> in case of {@link Region#isTwoPass(int) multipass} FBO rendering.
      * </p>
@@ -235,7 +236,7 @@ public final class RegionRenderer {
      * Initialize shader and bindings for GPU based rendering bound to the given GL object's GLContext
      * if not initialized yet.
      * <p>Disables the renderer via {@link #enable(GL2ES2, boolean)} to remove any side-effects, ie ShaderState incl. shader program.</p>
-     * <p>Shall be called once before at initialization before a {@code draw()} method, e.g. {@link RegionRenderer#draw(GL2ES2, Region, int)}</p>
+     * <p>Shall be called once before at initialization before a {@code draw()} method, e.g. {@link RegionRenderer#draw(GL2ES2, Region, int, int)}</p>
      *
      * @param gl referencing the current GLContext to which the ShaderState is bound to
      * @throws GLException if initialization failed
@@ -273,8 +274,8 @@ public final class RegionRenderer {
             }
             return;
         }
-        for(final Iterator<IntObjectHashMap.Entry> i = shaderPrograms.iterator(); i.hasNext(); ) {
-            final ShaderProgram sp = (ShaderProgram) i.next().getValue();
+        for(final Iterator<ShaderProgram> i = shaderPrograms.values().iterator(); i.hasNext(); ) {
+            final ShaderProgram sp = i.next();
             sp.destroy(gl);
         }
         shaderPrograms.clear();
@@ -404,6 +405,8 @@ public final class RegionRenderer {
 
     private static final String SHADER_SRC_SUB = "";
     private static final String SHADER_BIN_SUB = "bin";
+    private static final String GLSL_PARAM_COMMENT_START = "\n// JogAmp Graph Parameter Start\n";
+    private static final String GLSL_PARAM_COMMENT_END = "// JogAmp Graph Parameter End\n\n";
     private static final String GLSL_USE_COLOR_CHANNEL = "#define USE_COLOR_CHANNEL 1\n";
     private static final String GLSL_USE_COLOR_TEXTURE = "#define USE_COLOR_TEXTURE 1\n";
     private static final String GLSL_USE_AABBOX_CLIPPING = "#define USE_AABBOX_CLIPPING 1\n";
@@ -478,9 +481,7 @@ public final class RegionRenderer {
         }
 
         public static ShaderModeSelector1 selectPass2(final int renderModes, final int quality, final int sampleCount) {
-            if( Region.isMSAA(renderModes) ) {
-                return PASS2_MSAA;
-            } else if( Region.isVBAA(renderModes) ) {
+            if( Region.isVBAA(renderModes) ) {
                 if( 0 == quality ) {
                     if( sampleCount < 2 ) {
                         return PASS2_VBAA_QUAL0_SAMPLES1;
@@ -505,14 +506,81 @@ public final class RegionRenderer {
                     }
                 }
             } else {
-                return null;
+                return PASS2_MSAA; // Region.isMSAA(renderModes) and default
             }
         }
     }
-    private final IntObjectHashMap shaderPrograms = new IntObjectHashMap();
 
-    private static final int HIGH_MASK = Region.COLORCHANNEL_RENDERING_BIT | Region.COLORTEXTURE_RENDERING_BIT;
-    private static final int TWO_PASS_BIT = 1 <<  31;
+    private static class ShaderKey {
+        final boolean isTwoPass;
+        final boolean pass1;
+        final ShaderModeSelector1 sms;
+        final boolean hasAABBoxClipping; // pass1 or pass2
+        final boolean hasColorChannel; // pass1 only
+        final boolean hasColorTexture; // pass1 only
+        final String colorTexSeqID;
+        final int colorTexSeqHash;
+
+        final String texLookupFuncName;
+        final int hashValue;
+
+        ShaderKey(final int renderModes, final boolean pass1_, final int pass2Quality, final int sampleCount, final TextureSequence colorTexSeq, final boolean hasClipBBox) {
+            isTwoPass = Region.isTwoPass( renderModes );
+            pass1 = pass1_;
+            sms = pass1 ? ShaderModeSelector1.selectPass1(renderModes) :
+                          ShaderModeSelector1.selectPass2(renderModes, pass2Quality, sampleCount);
+            hasAABBoxClipping = hasClipBBox && ( ( !isTwoPass && pass1 ) || ( isTwoPass && !pass1 ) );
+            hasColorChannel = pass1 && Region.hasColorChannel( renderModes );
+            hasColorTexture = pass1 && Region.hasColorTexture( renderModes ) && null != colorTexSeq;
+            if( hasColorTexture ) {
+                texLookupFuncName = colorTexSeq.setTextureLookupFunctionName(gcuTexture2D);
+                colorTexSeqID = colorTexSeq.getTextureFragmentShaderHashID();
+                colorTexSeqHash = colorTexSeq.getTextureFragmentShaderHashCode();
+            } else {
+                texLookupFuncName = null;
+                colorTexSeqID = "";
+                colorTexSeqHash = 0;
+            }
+            {
+                // 31 * x == (x << 5) - x
+                int hash = 31 * ( isTwoPass ? 1 : 0 );
+                hash = ((hash << 5) - hash) + ( pass1 ? 1 : 0 ) ;
+                // hash = ((hash << 5) - hash) + pass2Quality; // included in sms
+                // hash = ((hash << 5) - hash) + sampleCount; // included in sms
+                hash = ((hash << 5) - hash) + sms.ordinal();
+                hash = ((hash << 5) - hash) + ( hasAABBoxClipping ? 1 : 0 );
+                hash = ((hash << 5) - hash) + ( hasColorChannel ? 1 : 0 );
+                hash = ((hash << 5) - hash) + ( hasColorTexture ? 1 : 0 );
+                hash = ((hash << 5) - hash) + colorTexSeqHash;
+                hashValue = hash;
+            }
+        }
+        @Override
+        public final int hashCode() { return hashValue; }
+        @Override
+        public final boolean equals(final Object other) {
+            if( this == other ) { return true; }
+            if( !(other instanceof ShaderKey) ) {
+                return false;
+            }
+            final ShaderKey o = (ShaderKey)other;
+            return isTwoPass == o.isTwoPass &&
+                   pass1 == o.pass1 &&
+                   // pass2Quality == o.pass2Quality && // included in sms
+                   // sampleCount == o.sampleCount && // included in sms
+                   sms.ordinal() == o.sms.ordinal() &&
+                   hasAABBoxClipping == o.hasAABBoxClipping &&
+                   hasColorChannel == o.hasColorChannel &&
+                   hasColorTexture == o.hasColorTexture &&
+                   colorTexSeqID.equals(o.colorTexSeqID);
+        }
+        @Override
+        public String toString() {
+            return "ShaderKey[hash 0x"+Integer.toHexString(hashValue)+", is2Pass "+isTwoPass+", pass1 "+pass1+
+                   ", has[clip "+hasAABBoxClipping+", colChan "+hasColorChannel+", colTex "+hasColorTexture+"], "+sms+"]";
+        }
+    }
+    private final HashMap<ShaderKey, ShaderProgram> shaderPrograms = new HashMap<ShaderKey, ShaderProgram>();
 
     /**
      * Generate, selects and caches the desired Curve-Graph {@link ShaderProgram} according to the given parameters.
@@ -523,7 +591,7 @@ public final class RegionRenderer {
      * @param gl
      * @param renderModes
      * @param pass1
-     * @param quality
+     * @param pass2Quality
      * @param sampleCount
      * @param colorTexSeq
      * @return true if a new shader program is being used and hence external uniform-data and -location,
@@ -533,55 +601,31 @@ public final class RegionRenderer {
      * @see RenderState#getShaderProgram()
      */
     public final boolean useShaderProgram(final GL2ES2 gl, final int renderModes,
-                                          final boolean pass1, final int quality, final int sampleCount, final TextureSequence colorTexSeq) {
-        final ShaderModeSelector1 sel1 = pass1 ? ShaderModeSelector1.selectPass1(renderModes) :
-                                                 ShaderModeSelector1.selectPass2(renderModes, quality, sampleCount);
-        final boolean hasAABBoxClipping = null != getClipBBox();
-        final boolean isTwoPass = Region.isTwoPass( renderModes );
-        final boolean hasColorChannel = Region.hasColorChannel( renderModes );
-        final boolean hasColorTexture = Region.hasColorTexture( renderModes ) && null != colorTexSeq;
-        final boolean isPass1ColorTexSeq = pass1 && hasColorTexture;
-        final int colorTexSeqHash;
-        final String texLookupFuncName;
-        if( isPass1ColorTexSeq ) {
-            texLookupFuncName = colorTexSeq.setTextureLookupFunctionName(gcuTexture2D);
-            colorTexSeqHash = colorTexSeq.getTextureFragmentShaderHashCode();
-        } else {
-            texLookupFuncName = null;
-            colorTexSeqHash = 0;
-        }
-        final int shaderKey;
-        {
-            // 31 * x == (x << 5) - x
-            int hash = 31 + colorTexSeqHash;
-            hash = ((hash << 5) - hash) + sel1.ordinal();
-            hash = ((hash << 5) - hash) + ( HIGH_MASK & renderModes );
-            hash = ((hash << 5) - hash) + ( hasAABBoxClipping ? 1 : 0 );
-            hash = ((hash << 5) - hash) + ( isTwoPass ? TWO_PASS_BIT : 0 );
-            shaderKey = hash;
-        }
+                                          final boolean pass1, final int pass2Quality, final int sampleCount, final TextureSequence colorTexSeq) {
+        final ShaderKey shaderKey = new ShaderKey(renderModes, pass1, pass2Quality, sampleCount, colorTexSeq, null != getClipBBox());
 
         /**
         if(DEBUG) {
-            System.err.printf("RegionRendererImpl01.useShaderProgram.0: renderModes %s, sel1 %s, key 0x%X (pass1 %b, q %d, samples %d) - Thread %s%n",
-                    Region.getRenderModeString(renderModes), sel1, shaderKey, pass1, quality, sampleCount, Thread.currentThread());
+            System.err.println("XXX "+Region.getRenderModeString(renderModes, sampleCount, 0)+", "+shaderKey);
         } */
 
-        ShaderProgram sp = (ShaderProgram) shaderPrograms.get( shaderKey );
+        ShaderProgram sp = shaderPrograms.get( shaderKey );
         if( null != sp ) {
             final boolean spChanged = rs.setShaderProgram(gl, sp);
-            if( DEBUG ) {
+            if( DEBUG_SHADER_MAP ) {
                 if( spChanged ) {
-                    System.err.printf("RegionRendererImpl01.useShaderProgram.X1: GOT renderModes %s, sel1 %s, key 0x%X -> sp %d / %d (changed)%n", Region.getRenderModeString(renderModes), sel1, shaderKey, sp.program(), sp.id());
+                    System.err.printf("RegionRenderer.useShaderProgram.X1: GOT renderModes %s, %s -> sp %d / %d (changed)%n",
+                            Region.getRenderModeString(renderModes), shaderKey, sp.program(), sp.id());
                 } else if( DEBUG_ALL_EVENT ) {
-                    System.err.printf("RegionRendererImpl01.useShaderProgram.X1: GOT renderModes %s, sel1 %s, key 0x%X -> sp %d / %d (keep)%n", Region.getRenderModeString(renderModes), sel1, shaderKey, sp.program(), sp.id());
+                    System.err.printf("RegionRenderer.useShaderProgram.X1: GOT renderModes %s, %s -> sp %d / %d (keep)%n",
+                            Region.getRenderModeString(renderModes), shaderKey, sp.program(), sp.id());
                 }
             }
             return spChanged;
         }
         final String versionedBaseName = getVersionedShaderName();
         final String vertexShaderName;
-        if( isTwoPass ) {
+        if( shaderKey.isTwoPass ) {
             vertexShaderName = versionedBaseName+"-pass"+(pass1?1:2);
         } else {
             vertexShaderName = versionedBaseName+"-single";
@@ -589,30 +633,30 @@ public final class RegionRenderer {
         final ShaderCode rsVp = ShaderCode.create(gl, GL2ES2.GL_VERTEX_SHADER, AttributeNames.class, SHADER_SRC_SUB, SHADER_BIN_SUB, vertexShaderName, true);
         final ShaderCode rsFp = ShaderCode.create(gl, GL2ES2.GL_FRAGMENT_SHADER, AttributeNames.class, SHADER_SRC_SUB, SHADER_BIN_SUB, versionedBaseName+"-segment-head", true);
 
-        if( isPass1ColorTexSeq && GLES2.GL_TEXTURE_EXTERNAL_OES == colorTexSeq.getTextureTarget() ) {
+        if( shaderKey.hasColorTexture && GLES2.GL_TEXTURE_EXTERNAL_OES == colorTexSeq.getTextureTarget() ) {
             if( !gl.isExtensionAvailable(GLExtensions.OES_EGL_image_external) ) {
                 throw new GLException(GLExtensions.OES_EGL_image_external+" requested but not available");
             }
         }
-        boolean supressGLSLVersionES30 = false;
-        if( isPass1ColorTexSeq && GLES2.GL_TEXTURE_EXTERNAL_OES == colorTexSeq.getTextureTarget() ) {
+        boolean preludeGLSLVersion = true;
+        if( shaderKey.hasColorTexture && GLES2.GL_TEXTURE_EXTERNAL_OES == colorTexSeq.getTextureTarget() ) {
             if( Platform.OSType.ANDROID == Platform.getOSType() && gl.isGLES3() ) {
                 // Bug on Nexus 10, ES3 - Android 4.3, where
                 // GL_OES_EGL_image_external extension directive leads to a failure _with_ '#version 300 es' !
                 //   P0003: Extension 'GL_OES_EGL_image_external' not supported
-                supressGLSLVersionES30 = true;
+                preludeGLSLVersion = false;
             }
         }
         //
         // GLSL customization at top
         //
-        int posVp = rsVp.defaultShaderCustomization(gl, !supressGLSLVersionES30, true);
+        int posVp = rsVp.defaultShaderCustomization(gl, preludeGLSLVersion, true);
         // rsFp.defaultShaderCustomization(gl, true, true);
-        int posFp = supressGLSLVersionES30 ? 0 : rsFp.addGLSLVersion(gl);
-        if( isPass1ColorTexSeq ) {
+        int posFp = preludeGLSLVersion ? rsFp.addGLSLVersion(gl) : 0;
+        if( shaderKey.hasColorTexture ) {
             posFp = rsFp.insertShaderSource(0, posFp, colorTexSeq.getRequiredExtensionsShaderStub());
         }
-        if( pass1 && supressGLSLVersionES30 || ( gl.isGLES2() && !gl.isGLES3() ) ) {
+        if( pass1 && !preludeGLSLVersion || ( gl.isGLES2() && !gl.isGLES3() ) ) {
             posFp = rsFp.insertShaderSource(0, posFp, ShaderCode.createExtensionDirective(GLExtensions.OES_standard_derivatives, ShaderCode.ENABLE));
         }
         if( false ) {
@@ -628,30 +672,36 @@ public final class RegionRenderer {
         // GLSL append from here on
         posFp = -1;
 
+        posVp = rsVp.insertShaderSource(0, posVp, GLSL_PARAM_COMMENT_START);
+        posFp = rsFp.insertShaderSource(0, posFp, GLSL_PARAM_COMMENT_START);
+
         if( !gl.getContext().hasRendererQuirk(GLRendererQuirks.GLSLBuggyDiscard) ) {
             posFp = rsFp.insertShaderSource(0, posFp, GLSL_USE_DISCARD);
         }
 
-        if( hasAABBoxClipping ) {
+        if( shaderKey.hasAABBoxClipping ) {
             posVp = rsVp.insertShaderSource(0, posVp, GLSL_USE_AABBOX_CLIPPING);
             posFp = rsFp.insertShaderSource(0, posFp, GLSL_USE_AABBOX_CLIPPING);
         }
 
-        if( hasColorChannel ) {
+        if( shaderKey.hasColorChannel ) {
             posVp = rsVp.insertShaderSource(0, posVp, GLSL_USE_COLOR_CHANNEL);
             posFp = rsFp.insertShaderSource(0, posFp, GLSL_USE_COLOR_CHANNEL);
         }
-        if( isPass1ColorTexSeq ) {
+        if( shaderKey.hasColorTexture ) {
                     rsVp.insertShaderSource(0, posVp, GLSL_USE_COLOR_TEXTURE);
             posFp = rsFp.insertShaderSource(0, posFp, GLSL_USE_COLOR_TEXTURE);
         }
         if( !pass1 ) {
-            posFp = rsFp.insertShaderSource(0, posFp, GLSL_DEF_SAMPLE_COUNT+sel1.sampleCount+"\n");
-            posFp = rsFp.insertShaderSource(0, posFp, GLSL_CONST_SAMPLE_COUNT+sel1.sampleCount+".0;\n");
+            posFp = rsFp.insertShaderSource(0, posFp, GLSL_DEF_SAMPLE_COUNT+shaderKey.sms.sampleCount+"\n");
+            posFp = rsFp.insertShaderSource(0, posFp, GLSL_CONST_SAMPLE_COUNT+shaderKey.sms.sampleCount+".0;\n");
         }
 
+        posVp = rsVp.insertShaderSource(0, posVp, GLSL_PARAM_COMMENT_END);
+        posFp = rsFp.insertShaderSource(0, posFp, GLSL_PARAM_COMMENT_END);
+
         try {
-            if( isPass1ColorTexSeq || hasAABBoxClipping ) {
+            if( shaderKey.hasColorTexture || shaderKey.hasAABBoxClipping ) {
                 posFp = rsFp.insertShaderSource(0, posFp, AttributeNames.class, "functions.glsl");
             }
             posFp = rsFp.insertShaderSource(0, posFp, AttributeNames.class, "uniforms.glsl");
@@ -663,7 +713,7 @@ public final class RegionRenderer {
             throw new RuntimeException("Failed to read: includes");
         }
 
-        if( isPass1ColorTexSeq ) {
+        if( shaderKey.hasColorTexture ) {
             posFp = rsFp.insertShaderSource(0, posFp, "uniform "+colorTexSeq.getTextureSampler2DType()+" "+UniformNames.gcu_ColorTexUnit+";\n");
             posFp = rsFp.insertShaderSource(0, posFp, colorTexSeq.getTextureLookupFragmentShaderImpl());
         }
@@ -671,7 +721,7 @@ public final class RegionRenderer {
         posFp = rsFp.insertShaderSource(0, posFp, GLSL_MAIN_BEGIN);
 
         final String passS = pass1 ? "-pass1-" : "-pass2-";
-        final String shaderSegment = versionedBaseName+passS+sel1.tech+sel1.sub+".glsl";
+        final String shaderSegment = versionedBaseName+passS+shaderKey.sms.tech+shaderKey.sms.sub+".glsl";
         if(DEBUG) {
             System.err.printf("RegionRendererImpl01.useShaderProgram.1: segment %s%n", shaderSegment);
         }
@@ -685,8 +735,8 @@ public final class RegionRenderer {
         }
         posFp = rsFp.insertShaderSource(0, posFp, "}\n");
 
-        if( isPass1ColorTexSeq ) {
-            rsFp.replaceInShaderSource(gcuTexture2D, texLookupFuncName);
+        if( shaderKey.hasColorTexture ) {
+            rsFp.replaceInShaderSource(gcuTexture2D, shaderKey.texLookupFuncName);
         }
 
         sp = new ShaderProgram();
@@ -703,9 +753,9 @@ public final class RegionRenderer {
         rs.setShaderProgram(gl, sp);
 
         shaderPrograms.put(shaderKey, sp);
-        if( DEBUG ) {
-            System.err.printf("RegionRendererImpl01.useShaderProgram.X1: PUT renderModes %s, sel1 %s, key 0x%X -> sp %d / %d (changed, new)%n",
-                    Region.getRenderModeString(renderModes), sel1, shaderKey, sp.program(), sp.id());
+        if( DEBUG_SHADER_MAP ) {
+            System.err.printf("RegionRenderer.useShaderProgram.X1: PUT renderModes %s, %s -> sp %d / %d (changed, new)%n",
+                    Region.getRenderModeString(renderModes), shaderKey, sp.program(), sp.id());
             // rsFp.dumpShaderSource(System.err);
         }
         return true;
diff --git a/src/jogl/classes/com/jogamp/graph/curve/opengl/RenderState.java b/src/jogl/classes/com/jogamp/graph/curve/opengl/RenderState.java
index ed4bc2585..24cab1b85 100644
--- a/src/jogl/classes/com/jogamp/graph/curve/opengl/RenderState.java
+++ b/src/jogl/classes/com/jogamp/graph/curve/opengl/RenderState.java
@@ -60,7 +60,7 @@ public class RenderState {
      * Shall be set via {@link #setHintMask(int)} and cleared via {@link #clearHintMask(int)}.
      * </p>
      * <p>
-     * If set, {@link GLRegion#draw(GL2ES2, RegionRenderer, int[]) GLRegion's draw-method}
+     * If set, {@link GLRegion#draw(GL2ES2, RegionRenderer, int, int[]) GLRegion's draw-method}
      * will set the proper {@link GL#glBlendFuncSeparate(int, int, int, int) blend-function}
      * and the clear-color to <i>transparent-black</i> in case of {@link Region#isTwoPass(int) multipass} FBO rendering.
      * </p>
@@ -79,7 +79,7 @@ public class RenderState {
      * Shall be set via {@link #setHintMask(int)} and cleared via {@link #clearHintMask(int)}.
      * </p>
      * <p>
-     * {@link GLRegion#draw(GL2ES2, RegionRenderer, int[]) GLRegion's draw-method}
+     * {@link GLRegion#draw(GL2ES2, RegionRenderer, int, int[]) GLRegion's draw-method}
      * may toggle depth test, and reset it's state according to this hint.
      * </p>
      * <p>
@@ -137,10 +137,12 @@ public class RenderState {
          * @param gl
          * @param updateLocation
          * @param renderModes
+         * @param setPMVMat01 TODO
          * @param throwOnError TODO
          * @return true if no error occurred, i.e. all locations found, otherwise false.
          */
-        public final boolean update(final GL2ES2 gl, final RenderState rs, final boolean updateLocation, final int renderModes, final boolean pass1, final boolean throwOnError) {
+        public final boolean update(final GL2ES2 gl, final RenderState rs, final boolean updateLocation, final int renderModes,
+                                    final boolean setPMVMat01, final boolean pass1, final boolean throwOnError) {
             if( rs.id() != rsId ) {
                 // Assignment of Renderstate buffers to uniforms (no copy, direct reference)
                 gcu_PMVMatrix01.setData(rs.pmvMatrix.getSyncPMv());
@@ -150,7 +152,7 @@ public class RenderState {
             }
             boolean res = true;
             if( null != rs.sp && rs.sp.inUse() ) {
-                if( !Region.isTwoPass(renderModes) || !pass1 ) {
+                if( setPMVMat01 ) {
                     final boolean r0 = rs.updateUniformDataLoc(gl, updateLocation, true, gcu_PMVMatrix01, throwOnError);
                     res = res && r0;
                 }
diff --git a/src/jogl/classes/com/jogamp/graph/curve/opengl/TextRegionUtil.java b/src/jogl/classes/com/jogamp/graph/curve/opengl/TextRegionUtil.java
index e6e4f3e0c..a0e342acd 100644
--- a/src/jogl/classes/com/jogamp/graph/curve/opengl/TextRegionUtil.java
+++ b/src/jogl/classes/com/jogamp/graph/curve/opengl/TextRegionUtil.java
@@ -231,7 +231,7 @@ public class TextRegionUtil {
         } else {
             renderer.setColorStatic(1, 1, 1, 1);
         }
-        region.draw(gl, renderer, sampleCount);
+        region.draw(gl, renderer, Region.MAX_AA_QUALITY, sampleCount);
         return res;
     }
 
@@ -293,7 +293,7 @@ public class TextRegionUtil {
         } else {
             renderer.setColorStatic(1, 1, 1, 1);
         }
-        region.draw(gl, renderer, sampleCount);
+        region.draw(gl, renderer, Region.MAX_AA_QUALITY, sampleCount);
         region.destroy(gl);
         return res;
     }
@@ -352,7 +352,7 @@ public class TextRegionUtil {
         } else {
             renderer.setColorStatic(1, 1, 1, 1);
         }
-        region.draw(gl, renderer, sampleCount);
+        region.draw(gl, renderer, Region.MAX_AA_QUALITY, sampleCount);
         return res;
     }
 
diff --git a/src/jogl/classes/com/jogamp/opengl/util/texture/ImageSequence.java b/src/jogl/classes/com/jogamp/opengl/util/texture/ImageSequence.java
index 2da2dcbfc..99704ced0 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/texture/ImageSequence.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/texture/ImageSequence.java
@@ -159,6 +159,7 @@ public class ImageSequence implements TextureSequence {
         } else if(null != texLookupFuncName && texLookupFuncName.length()>0) {
             textureLookupFunctionName = texLookupFuncName;
         }
+        textureFragmentShaderHashCode = 0;
         return textureLookupFunctionName;
     }
 
@@ -180,13 +181,22 @@ public class ImageSequence implements TextureSequence {
     }
 
     @Override
+    public String getTextureFragmentShaderHashID() {
+        // return getTextureSampler2DType()+";"+getTextureLookupFunctionName()+";"+getTextureLookupFragmentShaderImpl();
+        if( useBuildInTexLookup ) {
+            return getTextureSampler2DType()+";"+getTextureLookupFunctionName();
+        } else {
+            return getTextureLookupFragmentShaderImpl();
+        }
+    }
+
+    @Override
     public int getTextureFragmentShaderHashCode() {
         if( !isTextureAvailable() ) {
             textureFragmentShaderHashCode = 0;
             return 0;
         } else if( 0 == textureFragmentShaderHashCode ) {
-            int hash = 31 + getTextureLookupFragmentShaderImpl().hashCode();
-            hash = ((hash << 5) - hash) + getTextureSampler2DType().hashCode();
+            final int hash = getTextureFragmentShaderHashID().hashCode();
             textureFragmentShaderHashCode = hash;
         }
         return textureFragmentShaderHashCode;
diff --git a/src/jogl/classes/com/jogamp/opengl/util/texture/TextureSequence.java b/src/jogl/classes/com/jogamp/opengl/util/texture/TextureSequence.java
index 8376f0fa5..6aa70f014 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/texture/TextureSequence.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/texture/TextureSequence.java
@@ -274,19 +274,31 @@ public interface TextureSequence {
      * @throws IllegalStateException if instance is not initialized
      * @see #getTextureLookupFunctionName()
      * @see #setTextureLookupFunctionName(String)
+     * @see #getTextureFragmentShaderHashID()
      * @see #getTextureFragmentShaderHashCode()
      * @see #getTextureSampler2DType()
      */
     public String getTextureLookupFragmentShaderImpl() throws IllegalStateException;
 
     /**
-     * Returns the hash code of the strings:
+     * Returns the concatenated string representing the following values
+     * utilized for {@link #getTextureFragmentShaderHashCode()}.
      * <ul>
+     *   <li>{@link #getTextureSampler2DType()}</li>
      *   <li>{@link #getTextureLookupFunctionName()}</li>
      *   <li>{@link #getTextureLookupFragmentShaderImpl()}</li>
-     *   <li>{@link #getTextureSampler2DType()}</li>
      * </ul>
      * <p>
+     * To reduce string concatenating, implementation may simply return {@link #getTextureLookupFragmentShaderImpl()},
+     * if it covers {@link #getTextureSampler2DType()} and {@link #getTextureLookupFunctionName()}.
+     * </p>
+     * @see #getTextureFragmentShaderHashCode()
+     */
+    public String getTextureFragmentShaderHashID();
+
+    /**
+     * Returns the hash code of the string {@link #getTextureFragmentShaderHashID()}.
+     * <p>
      * User shall call {@link #setTextureLookupFunctionName(String)} first if intended.
      * </p>
      * <p>
@@ -296,12 +308,13 @@ public interface TextureSequence {
      * <p>
      * </p>
      * <p>
-     * Implementation caches the resulting hash code,
-     * which must be reset to zero if {@link #isTextureAvailable() texture is not available}.
+     * Implementation caches the resulting hash code, which is reset by {@link #setTextureLookupFunctionName(String)}
+     * and this method if {@link #isTextureAvailable() texture is not available}.
      * </p>
      * @see #setTextureLookupFunctionName(String)
      * @see #getTextureLookupFunctionName()
      * @see #getTextureLookupFragmentShaderImpl()
+     * @see #getTextureFragmentShaderHashID()
      */
     public int getTextureFragmentShaderHashCode();
 
diff --git a/src/jogl/classes/jogamp/graph/curve/opengl/VBORegion2PMSAAES2.java b/src/jogl/classes/jogamp/graph/curve/opengl/VBORegion2PMSAAES2.java
index 7abcf8818..416cf0b2b 100644
--- a/src/jogl/classes/jogamp/graph/curve/opengl/VBORegion2PMSAAES2.java
+++ b/src/jogl/classes/jogamp/graph/curve/opengl/VBORegion2PMSAAES2.java
@@ -27,6 +27,7 @@
  */
 package jogamp.graph.curve.opengl;
 
+import java.io.File;
 import java.nio.FloatBuffer;
 
 import com.jogamp.opengl.GL2ES2;
@@ -47,7 +48,9 @@ import com.jogamp.math.geom.AABBox;
 import com.jogamp.math.util.SyncMatrices4f16;
 import com.jogamp.opengl.FBObject;
 import com.jogamp.opengl.FBObject.Attachment;
+import com.jogamp.opengl.FBObject.TextureAttachment;
 import com.jogamp.opengl.util.GLArrayDataServer;
+import com.jogamp.opengl.util.GLReadBufferUtil;
 import com.jogamp.opengl.util.glsl.ShaderProgram;
 import com.jogamp.opengl.util.texture.Texture;
 import com.jogamp.opengl.util.texture.TextureSequence;
@@ -55,6 +58,7 @@ import com.jogamp.opengl.util.texture.TextureSequence;
 public final class VBORegion2PMSAAES2  extends GLRegion {
     private static final boolean DEBUG_FBO_1 = false;
     private static final boolean DEBUG_FBO_2 = false;
+    private static final boolean SCREENSHOT_FBO = false;
 
     private final RenderState.ProgramLocal rsLocal;
 
@@ -77,6 +81,8 @@ public final class VBORegion2PMSAAES2  extends GLRegion {
     private ShaderProgram spPass2 = null;
 
     private FBObject fbo;
+    private TextureAttachment texA;
+    private GLReadBufferUtil screenshot = SCREENSHOT_FBO ? new GLReadBufferUtil(true, false) : null;
 
     private int fboWidth = 0;
     private int fboHeight = 0;
@@ -149,18 +155,9 @@ public final class VBORegion2PMSAAES2  extends GLRegion {
         indicesBuffer.enableBuffer(gl, false);
         vpc_ileave.seal(gl, true);
         vpc_ileave.enableBuffer(gl, false);
-
         if( hasColorTexture && null != gcu_ColorTexUnit && colorTexSeq.isTextureAvailable() ) {
             TextureSequence.setTexCoordBBox(colorTexSeq.getLastTexture().getTexture(), box, isColorTextureLetterbox(), colorTexBBox, false);
         }
-        gca_FboVerticesAttr.seal(gl, false);
-        {
-            final FloatBuffer fb = (FloatBuffer)gca_FboVerticesAttr.getBuffer();
-            fb.put( 2, box.getMinZ());
-            fb.put( 5, box.getMinZ());
-            fb.put( 8, box.getMinZ());
-            fb.put(11, box.getMinZ());
-        }
         // Pending gca_FboVerticesAttr-seal and fboPMVMatrix-setup, follow fboDirty
 
         // push data 2 GPU ..
@@ -181,18 +178,18 @@ public final class VBORegion2PMSAAES2  extends GLRegion {
      * @param renderer
      * @param renderModes
      * @param pass1
-     * @param quality
+     * @param pass2Quality
      * @param sampleCount
      */
-    public void useShaderProgram(final GL2ES2 gl, final RegionRenderer renderer, final int curRenderModes, final boolean pass1, final int quality, final int sampleCount) {
+    public void useShaderProgram(final GL2ES2 gl, final RegionRenderer renderer, final int curRenderModes, final boolean pass1, final int pass2Quality, final int sampleCount) {
         final boolean isTwoPass = Region.isTwoPass( curRenderModes );
         final boolean hasColorChannel = Region.hasColorChannel( curRenderModes );
         final boolean hasColorTexture = Region.hasColorTexture( curRenderModes ) && null != colorTexSeq;
 
         final RenderState rs = renderer.getRenderState();
-        final boolean hasAABBoxClipping = null != rs.getClipBBox();
+        final boolean hasAABBoxClipping = null != rs.getClipBBox() && ( ( !isTwoPass && pass1 ) || ( isTwoPass && !pass1 ) );
 
-        final boolean updateLocGlobal = renderer.useShaderProgram(gl, curRenderModes, pass1, quality, sampleCount, colorTexSeq);
+        final boolean updateLocGlobal = renderer.useShaderProgram(gl, curRenderModes, pass1, pass2Quality, sampleCount, colorTexSeq);
         final ShaderProgram sp = renderer.getRenderState().getShaderProgram();
         final boolean updateLocLocal;
         if( pass1 ) {
@@ -200,7 +197,7 @@ public final class VBORegion2PMSAAES2  extends GLRegion {
             spPass1 = sp;
             if( DEBUG ) {
                 if( DEBUG_ALL_EVENT || updateLocLocal || updateLocGlobal ) {
-                    System.err.println("XXX changedSP.p1 updateLocation loc "+updateLocLocal+" / glob "+updateLocGlobal);
+                    System.err.println("XXX changedSP.p1 updateLocation loc "+updateLocLocal+" / glob "+updateLocGlobal+", sp "+sp.program()+" / "+sp.id());
                 }
             }
             if( updateLocLocal ) {
@@ -209,13 +206,12 @@ public final class VBORegion2PMSAAES2  extends GLRegion {
                 if( hasColorChannel && null != gca_ColorsAttr ) {
                     rs.updateAttributeLoc(gl, true, gca_ColorsAttr, true);
                 }
-                if( hasAABBoxClipping ) {
-                    rs.updateUniformLoc(gl, true, gcu_ClipBBox, true);
-                }
             }
-            rsLocal.update(gl, rs, updateLocLocal, curRenderModes, true, true);
             if( isTwoPass ) {
+                rsLocal.update(gl, rs, updateLocLocal, curRenderModes, false, true, true);
                 rs.updateUniformLoc(gl, updateLocLocal, gcu_PMVMatrix02, true);
+            } else {
+                rsLocal.update(gl, rs, updateLocLocal, curRenderModes, true, true, true);
             }
             if( hasColorTexture && null != gcu_ColorTexUnit ) {
                 rs.updateUniformLoc(gl, updateLocLocal, gcu_ColorTexUnit, true);
@@ -226,16 +222,19 @@ public final class VBORegion2PMSAAES2  extends GLRegion {
             spPass2 = sp;
             if( DEBUG ) {
                 if( DEBUG_ALL_EVENT || updateLocLocal || updateLocGlobal ) {
-                    System.err.println("XXX changedSP.p2 updateLocation loc "+updateLocLocal+" / glob "+updateLocGlobal);
+                    System.err.println("XXX changedSP.p2 updateLocation loc "+updateLocLocal+" / glob "+updateLocGlobal+", sp "+sp.program()+" / "+sp.id());
                 }
             }
             if( updateLocLocal ) {
                 rs.updateAttributeLoc(gl, true, gca_FboVerticesAttr, true);
                 rs.updateAttributeLoc(gl, true, gca_FboTexCoordsAttr, true);
             }
-            rsLocal.update(gl, rs, updateLocLocal, curRenderModes, false, true);
+            rsLocal.update(gl, rs, updateLocLocal, curRenderModes, true, false, true);
             rs.updateUniformDataLoc(gl, updateLocLocal, false /* updateData */, gcu_FboTexUnit, true); // FIXME always update if changing tex-unit
         }
+        if( hasAABBoxClipping && updateLocLocal ) {
+            rs.updateUniformLoc(gl, true, gcu_ClipBBox, true);
+        }
     }
 
     private final AABBox drawWinBox = new AABBox();
@@ -244,7 +243,7 @@ public final class VBORegion2PMSAAES2  extends GLRegion {
     private static final int border = 2; // surrounding border, i.e. width += 2*border, height +=2*border
 
     @Override
-    protected void drawImpl(final GL2ES2 gl, final RegionRenderer renderer, final int curRenderModes, final int[/*1*/] sampleCount) {
+    protected void drawImpl(final GL2ES2 gl, final RegionRenderer renderer, final int curRenderModes, final int pass2Quality, final int[/*1*/] sampleCount) {
         if( 0 >= indicesBuffer.getElemCount() ) {
             if(DEBUG_INSTANCE) {
                 System.err.printf("VBORegion2PMSAAES2.drawImpl: Empty%n");
@@ -260,8 +259,8 @@ public final class VBORegion2PMSAAES2  extends GLRegion {
         final RenderState rs = renderer.getRenderState();
         final int vpWidth = renderer.getWidth();
         final int vpHeight = renderer.getHeight();
-        if(vpWidth <=0 || vpHeight <= 0 || null==sampleCount || sampleCount[0] <= 0) {
-            useShaderProgram(gl, renderer, curRenderModes, true, getQuality(), sampleCount[0]);
+        if(vpWidth <=0 || vpHeight <= 0 || sampleCount[0] < 0) {
+            useShaderProgram(gl, renderer, curRenderModes, true, pass2Quality, sampleCount[0]);
             renderRegion(gl, rs, curRenderModes);
         } else {
             if(0 > maxTexSize[0]) {
@@ -311,9 +310,9 @@ public final class VBORegion2PMSAAES2  extends GLRegion {
                             diffObjWidth, diffObjHeight, ratioObjWinWidth, ratioObjWinWidth, diffObjBorderWidth, diffObjBorderHeight);
                     System.err.printf("XXX.MinMax win %s%n", drawWinBox.toString());
                     System.err.printf("XXX.MinMax view[%s] -> win[%.3f, %.3f], i[%d x %d], d[%.3f, %.3f], r[%f, %f]: FBO i[%d x %d], samples %d%n",
-                            drawView, drawView,
-                            winWidth, winHeight, targetWinWidth, targetWinHeight, diffWinWidth,
-                            diffWinHeight, ratioWinWidth, ratioWinHeight,
+                            drawView,
+                            winWidth, winHeight, targetWinWidth, targetWinHeight,
+                            diffWinWidth, diffWinHeight, ratioWinWidth, ratioWinHeight,
                             targetFboWidth, targetFboHeight,
                             sampleCount[0]);
                 }
@@ -331,30 +330,37 @@ public final class VBORegion2PMSAAES2  extends GLRegion {
                 System.err.printf("XXX.Scale %d * [%f x %f]: %d x %d%n",
                         sampleCount[0], winWidth, winHeight, targetFboWidth, targetFboHeight);
             }
-            if( hasDelta || fboDirty || isShapeDirty() || null == fbo || fbo.getNumSamples() != sampleCount[0] ) {
+            if( hasDelta || fboDirty || isShapeDirty() || null == fbo ) {
                 // FIXME: rescale
                 final float minX = box.getMinX()-diffObjBorderWidth;
                 final float minY = box.getMinY()-diffObjBorderHeight;
                 final float maxX = box.getMaxX()+diffObjBorderWidth+diffObjWidth;
                 final float maxY = box.getMaxY()+diffObjBorderHeight+diffObjHeight;
+                final float minZ = box.getMinZ();
                 gca_FboVerticesAttr.seal(false);
                 {
                     final FloatBuffer fb = (FloatBuffer)gca_FboVerticesAttr.getBuffer();
-                    fb.put(0, minX); fb.put( 1, minY);
-                    fb.put(3, minX); fb.put( 4, maxY);
-                    fb.put(6, maxX); fb.put( 7, maxY);
-                    fb.put(9, maxX); fb.put(10, minY);
+                    fb.put(0, minX); fb.put( 1, minY); fb.put( 2, minZ);
+                    fb.put(3, minX); fb.put( 4, maxY); fb.put( 5, minZ);
+                    fb.put(6, maxX); fb.put( 7, maxY); fb.put( 8, minZ);
+                    fb.put(9, maxX); fb.put(10, minY); fb.put(11, minZ);
                     fb.position(12);
                 }
                 gca_FboVerticesAttr.seal(true);
                 matP.setToOrtho(minX, maxX, minY, maxY, -1, 1);
-                useShaderProgram(gl, renderer, curRenderModes, true, getQuality(), sampleCount[0]);
-                renderRegion2FBO(gl, rs, curRenderModes, targetFboWidth, targetFboHeight, vpWidth, vpHeight, sampleCount);
+                useShaderProgram(gl, renderer, curRenderModes, true, pass2Quality, sampleCount[0]);
+                renderRegion2FBO(gl, rs, curRenderModes,
+                                 // (int)drawWinBox.getMinX(), (int)drawWinBox.getMinY(), targetFboWidth, targetFboHeight,
+                                 0, 0, targetFboWidth, targetFboHeight,
+                                 vpWidth, vpHeight, sampleCount);
             } else if( isStateDirty() ) {
-                useShaderProgram(gl, renderer, curRenderModes, true, getQuality(), sampleCount[0]);
-                renderRegion2FBO(gl, rs, curRenderModes, targetFboWidth, targetFboHeight, vpWidth, vpHeight, sampleCount);
+                useShaderProgram(gl, renderer, curRenderModes, true, pass2Quality, sampleCount[0]);
+                renderRegion2FBO(gl, rs, curRenderModes,
+                                 // (int)drawWinBox.getMinX(), (int)drawWinBox.getMinY(), targetFboWidth, targetFboHeight,
+                                 0, 0, targetFboWidth, targetFboHeight,
+                                 vpWidth, vpHeight, sampleCount);
             }
-            useShaderProgram(gl, renderer, curRenderModes, false, getQuality(), sampleCount[0]);
+            useShaderProgram(gl, renderer, curRenderModes, false, pass2Quality, sampleCount[0]);
             renderFBO(gl, rs, vpWidth, vpHeight, sampleCount[0]);
         }
     }
@@ -376,9 +382,18 @@ public final class VBORegion2PMSAAES2  extends GLRegion {
             gl.glBlendFunc(GL.GL_ONE, GL.GL_ONE_MINUS_SRC_ALPHA);
         }
 
+        {
+            final AABBox cb = rs.getClipBBox();
+            if( null != cb ) {
+                clipBBox[0] = cb.getMinX(); clipBBox[1] = cb.getMinY(); clipBBox[2] = cb.getMinZ();
+                clipBBox[3] = cb.getMaxX(); clipBBox[4] = cb.getMaxY(); clipBBox[5] = cb.getMaxZ();
+                gl.glUniform(gcu_ClipBBox); // Always update, since program maybe used by multiple regions
+            }
+        }
+
         gl.glActiveTexture(GL.GL_TEXTURE0 + gcu_FboTexUnit.intValue());
 
-        fbo.use(gl, fbo.getSamplingSink().getTextureAttachment());
+        fbo.use(gl, texA);
         gca_FboVerticesAttr.enableBuffer(gl, true);
         gca_FboTexCoordsAttr.enableBuffer(gl, true);
         indicesFbo.bindBuffer(gl, true); // keeps VBO binding
@@ -394,44 +409,58 @@ public final class VBORegion2PMSAAES2  extends GLRegion {
     }
 
     private void renderRegion2FBO(final GL2ES2 gl, final RenderState rs, final int curRenderModes,
-                                  final int targetFboWidth, final int targetFboHeight,
+                                  final int fboX, final int fboY, final int targetFboWidth, final int targetFboHeight,
                                   final int vpWidth, final int vpHeight, final int[] sampleCount) {
         if( 0 >= targetFboWidth || 0 >= targetFboHeight ) {
-            throw new IllegalArgumentException("fboSize must be greater than 0: "+targetFboWidth+"x"+targetFboHeight);
+            throw new IllegalArgumentException("targetFBOSize "+targetFboWidth+"x"+targetFboHeight+" must be greater than 0");
         }
-
         final boolean blendingEnabled = rs.isHintMaskSet(RenderState.BITHINT_BLENDING_ENABLED);
+        final int targetFboSamples = sampleCount[0] > 1 ? sampleCount[0] : 0;
+        final boolean fboSampleTypeMatch;
+        {
+            final int oldSampleCount = null != fbo ? fbo.getNumSamples() : 0;
+            fboSampleTypeMatch = ( oldSampleCount > 1 && targetFboSamples > 1 ) || ( oldSampleCount <= 1 && targetFboSamples <= 1 );
+        }
 
-        if(null == fbo) {
+        if(null == fbo || !fboSampleTypeMatch) {
+            if( null != fbo ) {
+                fbo.destroy(gl);
+            }
             fboWidth  = targetFboWidth;
             fboHeight  = targetFboHeight;
             fbo = new FBObject();
-            fbo.init(gl, fboWidth, fboHeight, sampleCount[0]);
-            sampleCount[0] = fbo.getNumSamples();
-            fbo.attachColorbuffer(gl, 0, true);
-            if( !blendingEnabled ) {
-                // no depth-buffer w/ blending
-                fbo.attachRenderbuffer(gl, Attachment.Type.DEPTH, FBObject.DEFAULT_BITS);
-            }
-            final FBObject ssink = new FBObject();
-            {
-                ssink.init(gl, fboWidth, fboHeight, 0);
-                // FIXME: shall not use bilinear (GL_LINEAR), due to MSAA ???
-                // ssink.attachTexture2D(gl, 0, true, GL2ES2.GL_LINEAR, GL2ES2.GL_LINEAR, GL2ES2.GL_CLAMP_TO_EDGE, GL2ES2.GL_CLAMP_TO_EDGE);
-                ssink.attachTexture2D(gl, 0, true, GL.GL_NEAREST, GL.GL_NEAREST, GL.GL_CLAMP_TO_EDGE, GL.GL_CLAMP_TO_EDGE);
+            fbo.init(gl, targetFboWidth, targetFboHeight, targetFboSamples);
+            sampleCount[0] = Math.max(1, fbo.getNumSamples());
+            if( 0 == targetFboSamples ) {
+                texA = fbo.attachTexture2D(gl, 0, true, GL.GL_LINEAR, GL.GL_LINEAR, GL.GL_CLAMP_TO_EDGE, GL.GL_CLAMP_TO_EDGE);
                 if( !blendingEnabled ) {
                     // no depth-buffer w/ blending
-                    ssink.attachRenderbuffer(gl, Attachment.Type.DEPTH, FBObject.DEFAULT_BITS);
+                    fbo.attachRenderbuffer(gl, Attachment.Type.DEPTH, FBObject.DEFAULT_BITS);
                 }
+            } else {
+                fbo.attachColorbuffer(gl, 0, true);
+                if( !blendingEnabled ) {
+                    // no depth-buffer w/ blending
+                    fbo.attachRenderbuffer(gl, Attachment.Type.DEPTH, FBObject.DEFAULT_BITS);
+                }
+                final FBObject ssink = new FBObject();
+                {
+                    ssink.init(gl, targetFboWidth, targetFboHeight, 0);
+                    texA = ssink.attachTexture2D(gl, 0, true, GL.GL_NEAREST, GL.GL_NEAREST, GL.GL_CLAMP_TO_EDGE, GL.GL_CLAMP_TO_EDGE);
+                    if( !blendingEnabled ) {
+                        // no depth-buffer w/ blending
+                        ssink.attachRenderbuffer(gl, Attachment.Type.DEPTH, FBObject.DEFAULT_BITS);
+                    }
+                }
+                fbo.setSamplingSink(ssink);
+                fbo.resetSamplingSink(gl); // validate
             }
-            fbo.setSamplingSink(ssink);
-            fbo.resetSamplingSink(gl); // validate
             if( DEBUG_FBO_1 ) {
-                System.err.printf("XXX.createFBO: blending %b, %dx%d%n%s%n", blendingEnabled, fboWidth, fboHeight, fbo.toString());
+                System.err.printf("XXX.createFBO: blending %b, %dx%d%n%s%n", blendingEnabled, targetFboWidth, targetFboHeight, fbo.toString());
             }
-        } else if( targetFboWidth != fboWidth || targetFboHeight != fboHeight || fbo.getNumSamples() != sampleCount[0] ) {
-            fbo.reset(gl, targetFboWidth, targetFboHeight, sampleCount[0]);
-            sampleCount[0] = fbo.getNumSamples();
+        } else if( targetFboWidth != fboWidth || targetFboHeight != fboHeight || fbo.getNumSamples() != targetFboSamples ) {
+            fbo.reset(gl, targetFboWidth, targetFboHeight, targetFboSamples);
+            sampleCount[0] = Math.max(1, fbo.getNumSamples());
             if( DEBUG_FBO_1 ) {
                 System.err.printf("XXX.resetFBO: %dx%d -> %dx%d%n%s%n", fboWidth, fboHeight, targetFboWidth, targetFboHeight, fbo );
             }
@@ -441,7 +470,7 @@ public final class VBORegion2PMSAAES2  extends GLRegion {
         fbo.bind(gl);
 
         //render texture
-        gl.glViewport(0, 0, fboWidth, fboHeight);
+        gl.glViewport(fboX, fboY, targetFboWidth, targetFboHeight);
         if( blendingEnabled ) {
             gl.glClearColor(0f, 0f, 0f, 0.0f);
             gl.glClear(GL.GL_COLOR_BUFFER_BIT); // no depth-buffer w/ blending
@@ -460,6 +489,14 @@ public final class VBORegion2PMSAAES2  extends GLRegion {
 
         renderRegion(gl, rs, curRenderModes);
 
+        if( SCREENSHOT_FBO ) {
+            screenshot.setReadBuffer(GL.GL_COLOR_ATTACHMENT0);
+            if(screenshot.readPixels(gl, fboX, fboY, targetFboWidth, targetFboHeight, false)) {
+                final File f = new File("screenshot_vboregion2pmsaa.png");
+                screenshot.write(f);
+            }
+        }
+
         fbo.unbind(gl);
         fboDirty = false;
     }
@@ -469,14 +506,6 @@ public final class VBORegion2PMSAAES2  extends GLRegion {
         final boolean hasColorTexture = Region.hasColorTexture( curRenderModes );
 
         gl.glUniform(gcu_PMVMatrix02);
-        {
-            final AABBox cb = rs.getClipBBox();
-            if( null != cb ) {
-                clipBBox[0] = cb.getMinX(); clipBBox[1] = cb.getMinY(); clipBBox[2] = cb.getMinZ();
-                clipBBox[3] = cb.getMaxX(); clipBBox[4] = cb.getMaxY(); clipBBox[5] = cb.getMaxZ();
-                gl.glUniform(gcu_ClipBBox); // Always update, since program maybe used by multiple regions
-            }
-        }
 
         vpc_ileave.enableBuffer(gl, true);
         indicesBuffer.bindBuffer(gl, true); // keeps VBO binding
@@ -507,6 +536,7 @@ public final class VBORegion2PMSAAES2  extends GLRegion {
         if(null != fbo) {
             fbo.destroy(gl);
             fbo = null;
+            texA = null;
         }
         if(null != gca_FboVerticesAttr) {
             gca_FboVerticesAttr.destroy(gl);
@@ -520,6 +550,10 @@ public final class VBORegion2PMSAAES2  extends GLRegion {
             indicesFbo.destroy(gl);
             indicesFbo = null;
         }
+        if( null != screenshot ) {
+            screenshot.dispose(gl);
+            screenshot = null;
+        }
         spPass1 = null; // owned by RegionRenderer
         spPass2 = null; // owned by RegionRenderer
     }
diff --git a/src/jogl/classes/jogamp/graph/curve/opengl/VBORegion2PVBAAES2.java b/src/jogl/classes/jogamp/graph/curve/opengl/VBORegion2PVBAAES2.java
index 389a1aca6..3517c7a6b 100644
--- a/src/jogl/classes/jogamp/graph/curve/opengl/VBORegion2PVBAAES2.java
+++ b/src/jogl/classes/jogamp/graph/curve/opengl/VBORegion2PVBAAES2.java
@@ -27,6 +27,7 @@
  */
 package jogamp.graph.curve.opengl;
 
+import java.io.File;
 import java.nio.FloatBuffer;
 
 import com.jogamp.opengl.GL2ES2;
@@ -38,7 +39,6 @@ import jogamp.graph.curve.opengl.shader.AttributeNames;
 import jogamp.graph.curve.opengl.shader.UniformNames;
 import jogamp.opengl.Debug;
 
-import com.jogamp.common.util.PropertyAccess;
 import com.jogamp.graph.curve.Region;
 import com.jogamp.graph.curve.opengl.GLRegion;
 import com.jogamp.graph.curve.opengl.RegionRenderer;
@@ -51,6 +51,7 @@ import com.jogamp.opengl.FBObject;
 import com.jogamp.opengl.FBObject.Attachment;
 import com.jogamp.opengl.FBObject.TextureAttachment;
 import com.jogamp.opengl.util.GLArrayDataServer;
+import com.jogamp.opengl.util.GLReadBufferUtil;
 import com.jogamp.opengl.util.glsl.ShaderProgram;
 import com.jogamp.opengl.util.texture.Texture;
 import com.jogamp.opengl.util.texture.TextureSequence;
@@ -58,37 +59,12 @@ import com.jogamp.opengl.util.texture.TextureSequence;
 public final class VBORegion2PVBAAES2  extends GLRegion {
     private static final boolean DEBUG_FBO_1 = false;
     private static final boolean DEBUG_FBO_2 = false;
-
-    /**
-     * Boundary triggering FBO resize if
-     * <pre>
-     *      fbo[Width|Height] - targetFbo[Width|Height] > RESIZE_BOUNDARY.
-     * </pre>
-     * <p>
-     * Increasing the FBO will add RESIZE_BOUNDARY/2.
-     * </p>
-     * <p>
-     * Reducing FBO resize to gain performance.
-     * </p>
-     * <p>
-     * Defaults to disabled since:
-     *   - not working properly
-     *   - FBO texture rendered > than desired size
-     *   - FBO resize itself should be fast enough ?!
-     * </p>
-     */
-    private static final int RESIZE_BOUNDARY;
+    private static final boolean SCREENSHOT_FBO = false;
 
     static {
         Debug.initSingleton();
-        final String key = "jogl.debug.graph.curve.vbaa.resizeLowerBoundary";
-        RESIZE_BOUNDARY = Math.max(0, PropertyAccess.getIntProperty(key, true, 0));
-        if( RESIZE_BOUNDARY > 0 ) {
-            System.err.println("key: "+RESIZE_BOUNDARY);
-        }
     }
 
-
     private final RenderState.ProgramLocal rsLocal;
 
     // Pass-1:
@@ -112,6 +88,7 @@ public final class VBORegion2PVBAAES2  extends GLRegion {
 
     private FBObject fbo;
     private TextureAttachment texA;
+    private GLReadBufferUtil screenshot = SCREENSHOT_FBO ? new GLReadBufferUtil(true, false) : null;
 
     private int fboWidth = 0;
     private int fboHeight = 0;
@@ -129,18 +106,18 @@ public final class VBORegion2PVBAAES2  extends GLRegion {
      * @param renderer
      * @param curRenderModes
      * @param pass1
-     * @param quality
+     * @param pass2Quality
      * @param sampleCount
      */
-    public void useShaderProgram(final GL2ES2 gl, final RegionRenderer renderer, final int curRenderModes, final boolean pass1, final int quality, final int sampleCount) {
+    public void useShaderProgram(final GL2ES2 gl, final RegionRenderer renderer, final int curRenderModes, final boolean pass1, final int pass2Quality, final int sampleCount) {
         final boolean isTwoPass = Region.isTwoPass( curRenderModes );
         final boolean hasColorChannel = Region.hasColorChannel( curRenderModes );
         final boolean hasColorTexture = Region.hasColorTexture( curRenderModes ) && null != colorTexSeq;
 
         final RenderState rs = renderer.getRenderState();
-        final boolean hasAABBoxClipping = null != rs.getClipBBox();
+        final boolean hasAABBoxClipping = null != rs.getClipBBox() && ( ( !isTwoPass && pass1 ) || ( isTwoPass && !pass1 ) );
 
-        final boolean updateLocGlobal = renderer.useShaderProgram(gl, curRenderModes, pass1, quality, sampleCount, colorTexSeq);
+        final boolean updateLocGlobal = renderer.useShaderProgram(gl, curRenderModes, pass1, pass2Quality, sampleCount, colorTexSeq);
         final ShaderProgram sp = renderer.getRenderState().getShaderProgram();
         final boolean updateLocLocal;
         if( pass1 ) {
@@ -148,7 +125,7 @@ public final class VBORegion2PVBAAES2  extends GLRegion {
             spPass1 = sp;
             if( DEBUG ) {
                 if( DEBUG_ALL_EVENT || updateLocLocal || updateLocGlobal ) {
-                    System.err.println("XXX changedSP.p1 updateLocation loc "+updateLocLocal+" / glob "+updateLocGlobal);
+                    System.err.println("XXX changedSP.p1 updateLocation loc "+updateLocLocal+" / glob "+updateLocGlobal+", sp "+sp.program()+" / "+sp.id());
                 }
             }
             if( updateLocLocal ) {
@@ -157,13 +134,12 @@ public final class VBORegion2PVBAAES2  extends GLRegion {
                 if( hasColorChannel && null != gca_ColorsAttr ) {
                     rs.updateAttributeLoc(gl, true, gca_ColorsAttr, true);
                 }
-                if( hasAABBoxClipping ) {
-                    rs.updateUniformLoc(gl, true, gcu_ClipBBox, true);
-                }
             }
-            rsLocal.update(gl, rs, updateLocLocal, curRenderModes, true, true);
             if( isTwoPass ) {
+                rsLocal.update(gl, rs, updateLocLocal, curRenderModes, false, true, true);
                 rs.updateUniformLoc(gl, updateLocLocal, gcu_PMVMatrix02, true);
+            } else {
+                rsLocal.update(gl, rs, updateLocLocal, curRenderModes, true, true, true);
             }
             if( hasColorTexture && null != gcu_ColorTexUnit ) {
                 rs.updateUniformLoc(gl, updateLocLocal, gcu_ColorTexUnit, true);
@@ -174,17 +150,20 @@ public final class VBORegion2PVBAAES2  extends GLRegion {
             spPass2 = sp;
             if( DEBUG ) {
                 if( DEBUG_ALL_EVENT || updateLocLocal || updateLocGlobal ) {
-                    System.err.println("XXX changedSP.p2 updateLocation loc "+updateLocLocal+" / glob "+updateLocGlobal);
+                    System.err.println("XXX changedSP.p2 updateLocation loc "+updateLocLocal+" / glob "+updateLocGlobal+", sp "+sp.program()+" / "+sp.id());
                 }
             }
             if( updateLocLocal ) {
                 rs.updateAttributeLoc(gl, true, gca_FboVerticesAttr, true);
                 rs.updateAttributeLoc(gl, true, gca_FboTexCoordsAttr, true);
             }
-            rsLocal.update(gl, rs, updateLocLocal, curRenderModes, false, true);
+            rsLocal.update(gl, rs, updateLocLocal, curRenderModes, true, false, true);
             rs.updateUniformDataLoc(gl, updateLocLocal, false /* updateData */, gcu_FboTexUnit, true); // FIXME always update if changing tex-unit
             rs.updateUniformLoc(gl, updateLocLocal, gcu_FboTexSize, sampleCount > 1); // maybe optimized away for sampleCount <= 1
         }
+        if( hasAABBoxClipping && updateLocLocal ) {
+            rs.updateUniformLoc(gl, true, gcu_ClipBBox, true);
+        }
     }
 
     public VBORegion2PVBAAES2(final GLProfile glp, final int renderModes, final TextureSequence colorTexSeq, final int pass2TexUnit,
@@ -254,14 +233,6 @@ public final class VBORegion2PVBAAES2  extends GLRegion {
         if( hasColorTexture && null != gcu_ColorTexUnit && colorTexSeq.isTextureAvailable() ) {
             TextureSequence.setTexCoordBBox(colorTexSeq.getLastTexture().getTexture(), box, isColorTextureLetterbox(), colorTexBBox, false);
         }
-        gca_FboVerticesAttr.seal(gl, false);
-        {
-            final FloatBuffer fb = (FloatBuffer)gca_FboVerticesAttr.getBuffer();
-            fb.put( 2, box.getMinZ());
-            fb.put( 5, box.getMinZ());
-            fb.put( 8, box.getMinZ());
-            fb.put(11, box.getMinZ());
-        }
         // Pending gca_FboVerticesAttr-seal and fboPMVMatrix-setup, follow fboDirty
 
         // push data 2 GPU ..
@@ -278,7 +249,7 @@ public final class VBORegion2PVBAAES2  extends GLRegion {
     private static final int border = 2; // surrounding border, i.e. width += 2*border, height +=2*border
 
     @Override
-    protected void drawImpl(final GL2ES2 gl, final RegionRenderer renderer, final int curRenderModes, final int[/*1*/] sampleCount) {
+    protected void drawImpl(final GL2ES2 gl, final RegionRenderer renderer, final int curRenderModes, final int pass2Quality, final int[/*1*/] sampleCount) {
         if( 0 >= indicesBuffer.getElemCount() ) {
             if(DEBUG_INSTANCE) {
                 System.err.printf("VBORegion2PVBAAES2.drawImpl: Empty%n");
@@ -294,8 +265,8 @@ public final class VBORegion2PVBAAES2  extends GLRegion {
         final RenderState rs = renderer.getRenderState();
         final int vpWidth = renderer.getWidth();
         final int vpHeight = renderer.getHeight();
-        if(vpWidth <=0 || vpHeight <= 0 || null==sampleCount || sampleCount[0] <= 0) {
-            useShaderProgram(gl, renderer, curRenderModes, true, getQuality(), sampleCount[0]);
+        if(vpWidth <=0 || vpHeight <= 0 || sampleCount[0] < 0) {
+            useShaderProgram(gl, renderer, curRenderModes, true, pass2Quality, sampleCount[0]);
             renderRegion(gl, rs, curRenderModes);
         } else {
             if(0 > maxTexSize[0]) {
@@ -355,8 +326,8 @@ public final class VBORegion2PVBAAES2  extends GLRegion {
                     System.err.printf("XXX.MinMax win %s%n", drawWinBox.toString());
                     System.err.printf("XXX.MinMax view[%s] -> win[%.3f, %.3f], i[%d x %d], d[%.3f, %.3f], r[%f, %f]: FBO f[%.3f, %.3f], i[%d x %d], d[%.3f, %.3f], r[%f, %f], samples %d%n",
                             drawView,
-                            winWidth, winHeight, targetWinWidth, targetWinHeight, diffWinWidth,
-                            diffWinHeight, ratioWinWidth, ratioWinHeight,
+                            winWidth, winHeight, targetWinWidth, targetWinHeight,
+                            diffWinWidth, diffWinHeight, ratioWinWidth, ratioWinHeight,
                             renderFboWidth, renderFboHeight, targetFboWidth, targetFboHeight,
                             diffFboWidth, diffFboHeight, ratioFboWidth, ratioFboHeight,
                             sampleCount[0]);
@@ -400,70 +371,35 @@ public final class VBORegion2PVBAAES2  extends GLRegion {
                     }
                 }
 
-                final int newFboWidth, newFboHeight, resizeCase;
-                if( 0 >= RESIZE_BOUNDARY ) {
-                    // Resize w/o optimization
-                    newFboWidth = targetFboWidth;
-                    newFboHeight = targetFboHeight;
-                    resizeCase = 0;
-                } else {
-                    if( 0 >= fboWidth || 0 >= fboHeight || null == fbo ) {
-                        // Case: New FBO
-                        newFboWidth = targetFboWidth;
-                        newFboHeight = targetFboHeight;
-                        resizeCase = 1;
-                    } else if( targetFboWidth > fboWidth || targetFboHeight > fboHeight ) {
-                        // Case: Inscrease FBO Size, add boundary/2 if avail
-                        newFboWidth = ( targetFboWidth + RESIZE_BOUNDARY/2 < maxTexSize[0] ) ? targetFboWidth + RESIZE_BOUNDARY/2 : targetFboWidth;
-                        newFboHeight = ( targetFboHeight+ RESIZE_BOUNDARY/2 < maxTexSize[0] ) ? targetFboHeight + RESIZE_BOUNDARY/2 : targetFboHeight;
-                        resizeCase = 2;
-                    } else if( targetFboWidth < fboWidth && targetFboHeight < fboHeight &&
-                               fboWidth - targetFboWidth < RESIZE_BOUNDARY &&
-                               fboHeight - targetFboHeight < RESIZE_BOUNDARY ) {
-                        // Case: Decreased FBO Size Request within boundary
-                        newFboWidth = fboWidth;
-                        newFboHeight = fboHeight;
-                        resizeCase = 3;
-                    } else {
-                        // Case: Decreased-Size-Beyond-Boundary or No-Resize
-                        newFboWidth = targetFboWidth;
-                        newFboHeight = targetFboHeight;
-                        resizeCase = 4;
-                    }
-                }
-                final int dResizeWidth = newFboWidth - targetFboWidth;
-                final int dResizeHeight = newFboHeight - targetFboHeight;
-                final float diffObjResizeWidth = dResizeWidth*ratioObjWinWidth;
-                final float diffObjResizeHeight = dResizeHeight*ratioObjWinHeight;
-                if( DEBUG_FBO_1 ) {
-                    System.err.printf("XXX.resizeFBO: case %d, has %dx%d > target %dx%d, resize: i[%d x %d], f[%.3f x %.3f] -> %dx%d%n",
-                            resizeCase, fboWidth, fboHeight, targetFboWidth, targetFboHeight,
-                            dResizeWidth, dResizeHeight, diffObjResizeWidth, diffObjResizeHeight,
-                            newFboWidth, newFboHeight);
-                }
-
                 final float minX = box.getMinX()-diffObjBorderWidth;
                 final float minY = box.getMinY()-diffObjBorderHeight;
-                final float maxX = box.getMaxX()+diffObjBorderWidth+diffObjWidth+diffObjResizeWidth;
-                final float maxY = box.getMaxY()+diffObjBorderHeight+diffObjHeight+diffObjResizeHeight;
+                final float maxX = box.getMaxX()+diffObjBorderWidth+diffObjWidth;
+                final float maxY = box.getMaxY()+diffObjBorderHeight+diffObjHeight;
+                final float minZ = box.getMinZ();
                 gca_FboVerticesAttr.seal(false);
                 {
                     final FloatBuffer fb = (FloatBuffer)gca_FboVerticesAttr.getBuffer();
-                    fb.put(0, minX); fb.put( 1, minY);
-                    fb.put(3, minX); fb.put( 4, maxY);
-                    fb.put(6, maxX); fb.put( 7, maxY);
-                    fb.put(9, maxX); fb.put(10, minY);
+                    fb.put(0, minX); fb.put( 1, minY); fb.put( 2, minZ);
+                    fb.put(3, minX); fb.put( 4, maxY); fb.put( 5, minZ);
+                    fb.put(6, maxX); fb.put( 7, maxY); fb.put( 8, minZ);
+                    fb.put(9, maxX); fb.put(10, minY); fb.put(11, minZ);
                     fb.position(12);
                 }
                 gca_FboVerticesAttr.seal(true);
                 matP.setToOrtho(minX, maxX, minY, maxY, -1, 1);
-                useShaderProgram(gl, renderer, curRenderModes, true, getQuality(), sampleCount[0]);
-                renderRegion2FBO(gl, rs, curRenderModes, targetFboWidth, targetFboHeight, newFboWidth, newFboHeight, vpWidth, vpHeight, sampleCount[0]);
+                useShaderProgram(gl, renderer, curRenderModes, true, pass2Quality, sampleCount[0]);
+                renderRegion2FBO(gl, rs, curRenderModes,
+                                 // (int)drawWinBox.getMinX(), (int)drawWinBox.getMinY(), targetFboWidth, targetFboHeight,
+                                 0, 0, targetFboWidth, targetFboHeight,
+                                 vpWidth, vpHeight, sampleCount[0]);
             } else if( isStateDirty() ) {
-                useShaderProgram(gl, renderer, curRenderModes, true, getQuality(), sampleCount[0]);
-                renderRegion2FBO(gl, rs, curRenderModes, targetFboWidth, targetFboHeight, fboWidth, fboHeight, vpWidth, vpHeight, sampleCount[0]);
+                useShaderProgram(gl, renderer, curRenderModes, true, pass2Quality, sampleCount[0]);
+                renderRegion2FBO(gl, rs, curRenderModes,
+                                 // (int)drawWinBox.getMinX(), (int)drawWinBox.getMinY(), targetFboWidth, targetFboHeight,
+                                 0, 0, targetFboWidth, targetFboHeight,
+                                 vpWidth, vpHeight, sampleCount[0]);
             }
-            useShaderProgram(gl, renderer, curRenderModes, false, getQuality(), sampleCount[0]);
+            useShaderProgram(gl, renderer, curRenderModes, false, pass2Quality, sampleCount[0]);
             renderFBO(gl, rs, targetFboWidth, targetFboHeight, vpWidth, vpHeight, sampleCount[0]);
         }
     }
@@ -483,6 +419,14 @@ public final class VBORegion2PVBAAES2  extends GLRegion {
         }
 
         gl.glUniform(gcu_FboTexSize);
+        {
+            final AABBox cb = rs.getClipBBox();
+            if( null != cb ) {
+                clipBBox[0] = cb.getMinX(); clipBBox[1] = cb.getMinY(); clipBBox[2] = cb.getMinZ();
+                clipBBox[3] = cb.getMaxX(); clipBBox[4] = cb.getMaxY(); clipBBox[5] = cb.getMaxZ();
+                gl.glUniform(gcu_ClipBBox); // Always update, since program maybe used by multiple regions
+            }
+        }
 
         gl.glActiveTexture(GL.GL_TEXTURE0 + gcu_FboTexUnit.intValue());
 
@@ -502,54 +446,56 @@ public final class VBORegion2PVBAAES2  extends GLRegion {
     }
 
     private void renderRegion2FBO(final GL2ES2 gl, final RenderState rs, final int curRenderModes,
-                                  final int targetFboWidth, final int targetFboHeight, final int newFboWidth, final int newFboHeight,
+                                  final int fboX, final int fboY, final int targetFboWidth, final int targetFboHeight,
                                   final int vpWidth, final int vpHeight, final int sampleCount) {
         if( 0 >= targetFboWidth || 0 >= targetFboHeight ) {
-            throw new IllegalArgumentException("fboSize must be greater than 0: "+targetFboWidth+"x"+targetFboHeight);
+            throw new IllegalArgumentException("targetFBOSize "+targetFboWidth+"x"+targetFboHeight+" must be greater than 0");
         }
-
         final boolean blendingEnabled = rs.isHintMaskSet(RenderState.BITHINT_BLENDING_ENABLED);
 
         if(null == fbo) {
-            fboWidth  = newFboWidth;
-            fboHeight  = newFboHeight;
+            fboWidth  = targetFboWidth;
+            fboHeight  = targetFboHeight;
             final FloatBuffer fboTexSize = (FloatBuffer) gcu_FboTexSize.getBuffer();
             {
-                fboTexSize.put(0, fboWidth);
-                fboTexSize.put(1, fboHeight);
+                fboTexSize.put(0, targetFboWidth);
+                fboTexSize.put(1, targetFboHeight);
             }
             fbo = new FBObject();
-            fbo.init(gl, fboWidth, fboHeight, 0);
-            // Shall not use bilinear (GL_LINEAR), due to own VBAA. Result is smooth w/o it now!
-            // FIXME: FXAA requires bilinear filtering!
-            // texA = fbo.attachTexture2D(gl, 0, true, GL.GL_LINEAR, GL.GL_LINEAR, GL.GL_CLAMP_TO_EDGE, GL.GL_CLAMP_TO_EDGE);
-            texA = fbo.attachTexture2D(gl, 0, true, GL.GL_NEAREST, GL.GL_NEAREST, GL.GL_CLAMP_TO_EDGE, GL.GL_CLAMP_TO_EDGE);
+            fbo.init(gl, targetFboWidth, targetFboHeight, 0);
+            if( sampleCount > 1 ) {
+                // Shall not use bilinear (GL_LINEAR), due to own VBAA. Result is smooth w/o it now!
+                // FIXME: FXAA requires bilinear filtering!
+                texA = fbo.attachTexture2D(gl, 0, true, GL.GL_NEAREST, GL.GL_NEAREST, GL.GL_CLAMP_TO_EDGE, GL.GL_CLAMP_TO_EDGE);
+            } else {
+                texA = fbo.attachTexture2D(gl, 0, true, GL.GL_LINEAR, GL.GL_LINEAR, GL.GL_CLAMP_TO_EDGE, GL.GL_CLAMP_TO_EDGE);
+            }
             if( !blendingEnabled ) {
                 // no depth-buffer w/ blending
                 fbo.attachRenderbuffer(gl, Attachment.Type.DEPTH, FBObject.DEFAULT_BITS);
             }
             if( DEBUG_FBO_1 ) {
-                System.err.printf("XXX.createFBO: %dx%d%n%s%n", fboWidth, fboHeight, fbo.toString());
+                System.err.printf("XXX.createFBO: %dx%d%n%s%n", targetFboWidth, targetFboHeight, fbo.toString());
             }
-        } else if( newFboWidth != fboWidth || newFboHeight != fboHeight ) {
-            fbo.reset(gl, newFboWidth, newFboHeight, 0);
+        } else if( targetFboWidth != fboWidth || targetFboHeight != fboHeight ) {
+            fbo.reset(gl, targetFboWidth, targetFboHeight, 0);
             fbo.bind(gl);
             if( DEBUG_FBO_1 ) {
-                System.err.printf("XXX.resetFBO: %dx%d -> %dx%d, target %dx%d%n", fboWidth, fboHeight, newFboWidth, newFboHeight, targetFboWidth, targetFboHeight);
+                System.err.printf("XXX.resetFBO: %dx%d -> %dx%d%n%s%n", fboWidth, fboHeight, targetFboWidth, targetFboHeight, fbo.toString());
             }
-            fboWidth  = newFboWidth;
-            fboHeight  = newFboHeight;
+            fboWidth  = targetFboWidth;
+            fboHeight  = targetFboHeight;
             final FloatBuffer fboTexSize = (FloatBuffer) gcu_FboTexSize.getBuffer();
             {
-                fboTexSize.put(0, fboWidth);
-                fboTexSize.put(1, fboHeight);
+                fboTexSize.put(0, targetFboWidth);
+                fboTexSize.put(1, targetFboHeight);
             }
         } else {
             fbo.bind(gl);
         }
 
         //render texture
-        gl.glViewport(0, 0, fboWidth, fboHeight);
+        gl.glViewport(fboX, fboY, targetFboWidth, targetFboHeight);
         if( blendingEnabled ) {
             gl.glClearColor(0f, 0f, 0f, 0.0f);
             gl.glClear(GL.GL_COLOR_BUFFER_BIT); // no depth-buffer w/ blending
@@ -564,6 +510,14 @@ public final class VBORegion2PVBAAES2  extends GLRegion {
 
         renderRegion(gl, rs, curRenderModes);
 
+        if( SCREENSHOT_FBO ) {
+            screenshot.setReadBuffer(GL.GL_COLOR_ATTACHMENT0);
+            if(screenshot.readPixels(gl, fboX, fboY, targetFboWidth, targetFboHeight, false)) {
+                final File f = new File("screenshot_vboregion2pvbaa.png");
+                screenshot.write(f);
+            }
+        }
+
         fbo.unbind(gl);
         fboDirty = false;
     }
@@ -573,14 +527,6 @@ public final class VBORegion2PVBAAES2  extends GLRegion {
         final boolean hasColorTexture = Region.hasColorTexture( curRenderModes );
 
         gl.glUniform(gcu_PMVMatrix02);
-        {
-            final AABBox cb = rs.getClipBBox();
-            if( null != cb ) {
-                clipBBox[0] = cb.getMinX(); clipBBox[1] = cb.getMinY(); clipBBox[2] = cb.getMinZ();
-                clipBBox[3] = cb.getMaxX(); clipBBox[4] = cb.getMaxY(); clipBBox[5] = cb.getMaxZ();
-                gl.glUniform(gcu_ClipBBox); // Always update, since program maybe used by multiple regions
-            }
-        }
 
         vpc_ileave.enableBuffer(gl, true);
         indicesBuffer.bindBuffer(gl, true); // keeps VBO binding
@@ -627,6 +573,10 @@ public final class VBORegion2PVBAAES2  extends GLRegion {
             indicesFbo.destroy(gl);
             indicesFbo = null;
         }
+        if( null != screenshot ) {
+            screenshot.dispose(gl);
+            screenshot = null;
+        }
         spPass1 = null; // owned by RegionRenderer
         spPass2 = null; // owned by RegionRenderer
     }
diff --git a/src/jogl/classes/jogamp/graph/curve/opengl/VBORegionSPES2.java b/src/jogl/classes/jogamp/graph/curve/opengl/VBORegionSPES2.java
index 281757da4..26748136e 100644
--- a/src/jogl/classes/jogamp/graph/curve/opengl/VBORegionSPES2.java
+++ b/src/jogl/classes/jogamp/graph/curve/opengl/VBORegionSPES2.java
@@ -115,22 +115,22 @@ public final class VBORegionSPES2 extends GLRegion {
      * @param gl
      * @param renderer
      * @param curRenderModes
-     * @param quality
+     * @param pass2Quality
      */
-    public void useShaderProgram(final GL2ES2 gl, final RegionRenderer renderer, final int curRenderModes, final int quality) {
+    public void useShaderProgram(final GL2ES2 gl, final RegionRenderer renderer, final int curRenderModes) {
         final boolean hasColorChannel = Region.hasColorChannel( curRenderModes );
         final boolean hasColorTexture = Region.hasColorTexture( curRenderModes ) && null != colorTexSeq;
 
         final RenderState rs = renderer.getRenderState();
         final boolean hasAABBoxClipping = null != rs.getClipBBox();
 
-        final boolean updateLocGlobal = renderer.useShaderProgram(gl, curRenderModes, true, quality, 0, colorTexSeq);
+        final boolean updateLocGlobal = renderer.useShaderProgram(gl, curRenderModes, true, 0 /* pass2Quality */, 0 /* sampleCount */, colorTexSeq);
         final ShaderProgram sp = renderer.getRenderState().getShaderProgram();
         final boolean updateLocLocal = !sp.equals(spPass1);
         spPass1 = sp;
         if( DEBUG ) {
             if( DEBUG_ALL_EVENT || updateLocLocal || updateLocGlobal ) {
-                System.err.println("XXX changedSP.p1 updateLocation loc "+updateLocLocal+" / glob "+updateLocGlobal);
+                System.err.println("XXX changedSP.p1 updateLocation loc "+updateLocLocal+" / glob "+updateLocGlobal+", sp "+sp.program()+" / "+sp.id());
             }
         }
         if( updateLocLocal ) {
@@ -143,7 +143,7 @@ public final class VBORegionSPES2 extends GLRegion {
                 rs.updateUniformLoc(gl, true, gcu_ClipBBox, throwOnError);
             }
         }
-        rsLocal.update(gl, rs, updateLocLocal, curRenderModes, true, throwOnError);
+        rsLocal.update(gl, rs, updateLocLocal, curRenderModes, true, true, throwOnError);
         if( hasColorTexture && null != gcu_ColorTexUnit ) {
             rs.updateUniformLoc(gl, updateLocLocal, gcu_ColorTexUnit, throwOnError);
             rs.updateUniformLoc(gl, updateLocLocal, gcu_ColorTexBBox, throwOnError);
@@ -152,11 +152,11 @@ public final class VBORegionSPES2 extends GLRegion {
 
 
     @Override
-    protected void drawImpl(final GL2ES2 gl, final RegionRenderer renderer, final int curRenderModes, final int[/*1*/] sampleCount) {
+    protected void drawImpl(final GL2ES2 gl, final RegionRenderer renderer, final int curRenderModes, final int pass2Quality, final int[/*1*/] sampleCount) {
         // final boolean hasColorChannel = Region.hasColorChannel( curRenderModes );
         final boolean hasColorTexture = Region.hasColorTexture( curRenderModes );
 
-        useShaderProgram(gl, renderer, curRenderModes, getQuality());
+        useShaderProgram(gl, renderer, curRenderModes);
         {
             final AABBox cb = renderer.getClipBBox();
             if( null != cb ) {
diff --git a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass1.vp b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass1.vp
index b9974b97d..cfec523e9 100644
--- a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass1.vp
+++ b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass1.vp
@@ -23,10 +23,7 @@ void main(void)
         gcv_CurveParam = gca_CurveParams;
     }
 #endif
-#ifdef USE_AABBOX_CLIPPING
-    gcv_ClipBBoxCoord = (gcu_PMVMatrix02[1] * gca_Vertices).xyz; // Mv
-#endif    
-    
+
 #ifdef USE_COLOR_TEXTURE
     gcv_ColorTexCoord = ( gca_Vertices.xy - gcu_ColorTexBBox[0] ) / ( gcu_ColorTexBBox[1] - gcu_ColorTexBBox[0] );
 #endif
diff --git a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2-msaa.glsl b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2-msaa.glsl
index 36d70cbdf..3d4cdc887 100644
--- a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2-msaa.glsl
+++ b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2-msaa.glsl
@@ -1,4 +1,14 @@
-        // Pass-2: Dump Texture
+    // Pass-2: Dump Texture
+#ifdef USE_AABBOX_CLIPPING
+    if( is_inside(gcv_ClipBBoxCoord, gcu_ClipBBox[0], gcu_ClipBBox[1]) < 0.5 ) {
+        #if USE_DISCARD
+            discard; // discard freezes NV tegra2 compiler
+        #else
+            mgl_FragColor = vec4(0);
+        #endif
+    } else
+#endif
+    {     
         vec4 t = texture2D(gcu_FboTexUnit, gcv_FboTexCoord.st);
         #if USE_DISCARD
             if( 0.0 == t.a ) {
@@ -9,4 +19,5 @@
         #else
             mgl_FragColor = t;
         #endif
+    }     
 
diff --git a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2-vbaa_bforce_even.glsl b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2-vbaa_bforce_even.glsl
index e83e21a55..5e14a1a23 100644
--- a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2-vbaa_bforce_even.glsl
+++ b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2-vbaa_bforce_even.glsl
@@ -1,6 +1,16 @@
-        // Pass-2: AA on Texture
-        // Note: gcv_FboTexCoord is in center of sample pixels.
+    // Pass-2: AA on Texture
+    // Note: gcv_FboTexCoord is in center of sample pixels.
 
+#ifdef USE_AABBOX_CLIPPING
+    if( is_inside(gcv_ClipBBoxCoord, gcu_ClipBBox[0], gcu_ClipBBox[1]) < 0.5 ) {
+        #if USE_DISCARD
+            discard; // discard freezes NV tegra2 compiler
+        #else
+            mgl_FragColor = vec4(0);
+        #endif
+    } else
+#endif
+    {     
         // float sample_count = gcu_FboTexSize.z;
         vec2 psize = 1.0 / gcu_FboTexSize.xy; // pixel size
 
@@ -97,4 +107,5 @@
         #else
             mgl_FragColor = t;
         #endif
+    }     
 
diff --git a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2-vbaa_bforce_odd.glsl b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2-vbaa_bforce_odd.glsl
index a3c61e595..b7d2e0e4e 100644
--- a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2-vbaa_bforce_odd.glsl
+++ b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2-vbaa_bforce_odd.glsl
@@ -1,6 +1,16 @@
-        // Pass-2: AA on Texture
-        // Note: gcv_FboTexCoord is in center of sample pixels.
+    // Pass-2: AA on Texture
+    // Note: gcv_FboTexCoord is in center of sample pixels.
 
+#ifdef USE_AABBOX_CLIPPING
+    if( is_inside(gcv_ClipBBoxCoord, gcu_ClipBBox[0], gcu_ClipBBox[1]) < 0.5 ) {
+        #if USE_DISCARD
+            discard; // discard freezes NV tegra2 compiler
+        #else
+            mgl_FragColor = vec4(0);
+        #endif
+    } else
+#endif
+    {     
         // float sample_count = gcu_FboTexSize.z;
         vec2 psize = 1.0 / gcu_FboTexSize.xy; // pixel size
 
@@ -88,4 +98,5 @@
         #else
             mgl_FragColor = t;
         #endif
+    }     
 
diff --git a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2-vbaa_flipquad3.glsl b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2-vbaa_flipquad3.glsl
index bc0044aab..da0306425 100644
--- a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2-vbaa_flipquad3.glsl
+++ b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2-vbaa_flipquad3.glsl
@@ -4,6 +4,16 @@
         // 
         // Same as flipquad - but w/ rgss coordinates
 
+#ifdef USE_AABBOX_CLIPPING
+    if( is_inside(gcv_ClipBBoxCoord, gcu_ClipBBox[0], gcu_ClipBBox[1]) < 0.5 ) {
+        #if USE_DISCARD
+            discard; // discard freezes NV tegra2 compiler
+        #else
+            mgl_FragColor = vec4(0);
+        #endif
+    } else
+#endif
+    {     
         // float sample_count = gcu_FboTexSize.z;
         vec2 psize = 1.0 / gcu_FboTexSize.xy; // pixel size
 
@@ -108,4 +118,4 @@
         #else
             mgl_FragColor = t;
         #endif
-
+    }     
diff --git a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2.vp b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2.vp
index 64857c9ce..e4087cbd6 100644
--- a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2.vp
+++ b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2.vp
@@ -13,5 +13,10 @@ void main(void)
 {
     // gl_Position = gcu_PMVMatrix01[0] * gcu_PMVMatrix01[1] * vec4(gca_FboVertices, 1);
     gl_Position = gcu_PMVMatrix01[0] * gcu_PMVMatrix01[1] * gca_FboVertices;
+    
+#ifdef USE_AABBOX_CLIPPING
+    gcv_ClipBBoxCoord = (gcu_PMVMatrix01[1] * gca_FboVertices).xyz; // Mv
+#endif    
+    
     gcv_FboTexCoord = gca_FboTexCoords;
 }
diff --git a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-single.vp b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-single.vp
index 9518834b0..2f07ad7d0 100644
--- a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-single.vp
+++ b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-single.vp
@@ -23,6 +23,7 @@ void main(void)
         gcv_CurveParam = gca_CurveParams;
     }
 #endif
+
 #ifdef USE_AABBOX_CLIPPING
     gcv_ClipBBoxCoord = (gcu_PMVMatrix01[1] * gca_Vertices).xyz; // Mv
 #endif    
diff --git a/src/jogl/classes/jogamp/opengl/util/av/GLMediaPlayerImpl.java b/src/jogl/classes/jogamp/opengl/util/av/GLMediaPlayerImpl.java
index 457157285..4a7e52c4f 100644
--- a/src/jogl/classes/jogamp/opengl/util/av/GLMediaPlayerImpl.java
+++ b/src/jogl/classes/jogamp/opengl/util/av/GLMediaPlayerImpl.java
@@ -65,7 +65,6 @@ import com.jogamp.common.util.WorkerThread;
 import com.jogamp.math.FloatUtil;
 import com.jogamp.opengl.GLExtensions;
 import com.jogamp.opengl.util.av.GLMediaPlayer;
-import com.jogamp.opengl.util.av.GLMediaPlayer.Chapter;
 import com.jogamp.opengl.util.glsl.ShaderCode;
 import com.jogamp.opengl.util.texture.Texture;
 import com.jogamp.opengl.util.texture.TextureData;
@@ -274,7 +273,7 @@ public abstract class GLMediaPlayerImpl implements GLMediaPlayer {
     protected int getAudioChannelLimit() { return userMaxChannels; }
 
     @Override
-    public String getRequiredExtensionsShaderStub() {
+    public final String getRequiredExtensionsShaderStub() {
         if(GLES2.GL_TEXTURE_EXTERNAL_OES == textureTarget) {
             return ShaderCode.createExtensionDirective(GLExtensions.OES_EGL_image_external, ShaderCode.ENABLE);
         }
@@ -282,7 +281,7 @@ public abstract class GLMediaPlayerImpl implements GLMediaPlayer {
     }
 
     @Override
-    public String getTextureSampler2DType() {
+    public final String getTextureSampler2DType() {
         switch(textureTarget) {
             case GL.GL_TEXTURE_2D:
             case GL2GL3.GL_TEXTURE_RECTANGLE:
@@ -305,6 +304,7 @@ public abstract class GLMediaPlayerImpl implements GLMediaPlayer {
     @Override
     public String setTextureLookupFunctionName(final String texLookupFuncName) throws IllegalStateException {
         textureLookupFunctionName = "texture2D";
+        resetTextureFragmentShaderHashCode();
         return textureLookupFunctionName;
     }
 
@@ -332,18 +332,23 @@ public abstract class GLMediaPlayerImpl implements GLMediaPlayer {
     }
 
     @Override
+    public String getTextureFragmentShaderHashID() {
+        // return getTextureSampler2DType()+";"+getTextureLookupFunctionName()+";"+getTextureLookupFragmentShaderImpl();
+        return getTextureSampler2DType()+";"+getTextureLookupFunctionName();
+    }
+
+    @Override
     public final int getTextureFragmentShaderHashCode() {
         if( State.Uninitialized == state ) {
-            textureFragmentShaderHashCode = 0;
+            resetTextureFragmentShaderHashCode();
             return 0;
         } else if( 0 == textureFragmentShaderHashCode ) {
-            int hash = 31 + getTextureLookupFunctionName().hashCode();
-            hash = ((hash << 5) - hash) + getTextureLookupFragmentShaderImpl().hashCode();
-            hash = ((hash << 5) - hash) + getTextureSampler2DType().hashCode();
+            final int hash = getTextureFragmentShaderHashID().hashCode();
             textureFragmentShaderHashCode = hash;
         }
         return textureFragmentShaderHashCode;
     }
+    protected final void resetTextureFragmentShaderHashCode() { textureFragmentShaderHashCode = 0; }
 
     @Override
     public final int getDecodedFrameCount() { return decodedFrameCount; }
diff --git a/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGMediaPlayer.java b/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGMediaPlayer.java
index 78c20d90a..4e1effb02 100644
--- a/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGMediaPlayer.java
+++ b/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGMediaPlayer.java
@@ -751,6 +751,7 @@ public class FFMPEGMediaPlayer extends GLMediaPlayerImpl {
         } else {
             textureLookupFunctionName = "ffmpegTexture2D";
         }
+        resetTextureFragmentShaderHashCode();
         return textureLookupFunctionName;
     }
 
@@ -762,7 +763,10 @@ public class FFMPEGMediaPlayer extends GLMediaPlayerImpl {
      */
     @Override
     public final String getTextureLookupFragmentShaderImpl() {
-      final float tc_w_1 = (float)getWidth() / (float)texWidth;
+        final float tc_w_1 = (float)getWidth() / (float)texWidth;
+        return getTextureLookupFragmentShaderImpl(tc_w_1);
+    }
+    private final String getTextureLookupFragmentShaderImpl(final float tc_w_1) {
       final String texLookupFuncName = getTextureLookupFunctionName();
       if( texLookupFuncName.equals("texture2D") ) {
           throw new IllegalArgumentException("Build in 'texture2D' lookup-func-name not allowed!");
@@ -919,6 +923,12 @@ public class FFMPEGMediaPlayer extends GLMediaPlayerImpl {
     }
 
     @Override
+    public final String getTextureFragmentShaderHashID() {
+        // return getTextureSampler2DType()+";"+getTextureLookupFunctionName()+";"+getTextureLookupFragmentShaderImpl(1.0f);
+        return getTextureLookupFragmentShaderImpl(1.0f); // state-less shader code required using 1.0
+    }
+
+    @Override
     public final boolean resumeImpl() {
         if(0==moviePtr) {
             return false;