Bug 801: Add Graph pass-2 shader for VBAA 'odd' sample count

6 files changed, 188 insertions, 90 deletions

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 289730ca0..23b82639f 100644
--- a/src/jogl/classes/com/jogamp/graph/curve/opengl/RegionRenderer.java
+++ b/src/jogl/classes/com/jogamp/graph/curve/opengl/RegionRenderer.java
@@ -323,14 +323,23 @@ public class RegionRenderer {
         PASS2_VBAA_QUAL0_SAMPLES4("vbaa", "_flipquad3", 4),
         /** Pass-2: VBAA Flipquad3, 8 samples */
         PASS2_VBAA_QUAL0_SAMPLES8("vbaa", "_flipquad3", 8),
-        /** Pass-2: VBAA All-Equal, 2 samples */
-        PASS2_VBAA_QUAL1_SAMPLES2("vbaa", "_allequal", 2),
-        /** Pass-2: VBAA All-Equal, 4 samples */
-        PASS2_VBAA_QUAL1_SAMPLES4("vbaa", "_allequal", 4),
-        /** Pass-2: VBAA All-Equal, 6 samples */
-        PASS2_VBAA_QUAL1_SAMPLES6("vbaa", "_allequal", 6),
-        /** Pass-2: VBAA All-Equal, 8 samples */
-        PASS2_VBAA_QUAL1_SAMPLES8("vbaa", "_allequal", 8);
+
+        /** Pass-2: VBAA Brute-Force, Odd, 1 samples */
+        PASS2_VBAA_QUAL1_SAMPLES1("vbaa", "_bforce_odd",  1),
+        /** Pass-2: VBAA Brute-Force, Even, 2 samples */
+        PASS2_VBAA_QUAL1_SAMPLES2("vbaa", "_bforce_even", 2),
+        /** Pass-2: VBAA Brute-Force, Odd, 3 samples */
+        PASS2_VBAA_QUAL1_SAMPLES3("vbaa", "_bforce_odd",  3),
+        /** Pass-2: VBAA Brute-Force, Even, 4 samples */
+        PASS2_VBAA_QUAL1_SAMPLES4("vbaa", "_bforce_even", 4),
+        /** Pass-2: VBAA Brute-Force, Odd, 5 samples */
+        PASS2_VBAA_QUAL1_SAMPLES5("vbaa", "_bforce_odd",  5),
+        /** Pass-2: VBAA Brute-Force, Even, 6 samples */
+        PASS2_VBAA_QUAL1_SAMPLES6("vbaa", "_bforce_even", 6),
+        /** Pass-2: VBAA Brute-Force, Odd, 7 samples */
+        PASS2_VBAA_QUAL1_SAMPLES7("vbaa", "_bforce_odd",  7),
+        /** Pass-2: VBAA Brute-Force, Even, 8 samples */
+        PASS2_VBAA_QUAL1_SAMPLES8("vbaa", "_bforce_even", 8);
 
         public final String tech;
         public final String sub;
@@ -361,14 +370,16 @@ public class RegionRenderer {
                         return PASS2_VBAA_QUAL0_SAMPLES8;
                     }
                 } else {
-                    if( sampleCount < 4 ) {
-                        return PASS2_VBAA_QUAL1_SAMPLES2;
-                    } else if( sampleCount < 6 ) {
-                        return PASS2_VBAA_QUAL1_SAMPLES4;
-                    } else if( sampleCount < 8 ) {
-                        return PASS2_VBAA_QUAL1_SAMPLES6;
-                    } else {
-                        return PASS2_VBAA_QUAL1_SAMPLES8;
+                    switch( sampleCount ) {
+                        case 0: // Fall through intended
+                        case 1:  return PASS2_VBAA_QUAL1_SAMPLES1;
+                        case 2:  return PASS2_VBAA_QUAL1_SAMPLES2;
+                        case 3:  return PASS2_VBAA_QUAL1_SAMPLES3;
+                        case 4:  return PASS2_VBAA_QUAL1_SAMPLES4;
+                        case 5:  return PASS2_VBAA_QUAL1_SAMPLES5;
+                        case 6:  return PASS2_VBAA_QUAL1_SAMPLES6;
+                        case 7:  return PASS2_VBAA_QUAL1_SAMPLES7;
+                        default: return PASS2_VBAA_QUAL1_SAMPLES8;
                     }
                 }
             } else {
diff --git a/src/jogl/classes/jogamp/graph/curve/opengl/VBORegion2PVBAAES2.java b/src/jogl/classes/jogamp/graph/curve/opengl/VBORegion2PVBAAES2.java
index 090623444..24fa09058 100644
--- a/src/jogl/classes/jogamp/graph/curve/opengl/VBORegion2PVBAAES2.java
+++ b/src/jogl/classes/jogamp/graph/curve/opengl/VBORegion2PVBAAES2.java
@@ -167,7 +167,7 @@ public class VBORegion2PVBAAES2  extends GLRegion {
             }
             rsLocal.update(gl, rs, updateLocLocal, renderModes, false, true);
             rs.updateUniformDataLoc(gl, updateLocLocal, false /* updateData */, gcu_FboTexUnit, true); // FIXME always update if changing tex-unit
-            rs.updateUniformLoc(gl, updateLocLocal, gcu_FboTexSize, true);
+            rs.updateUniformLoc(gl, updateLocLocal, gcu_FboTexSize, sampleCount > 1); // maybe optimized away for sampleCount <= 1
         }
     }
 
@@ -576,7 +576,7 @@ public class VBORegion2PVBAAES2  extends GLRegion {
             fbo.reset(gl, fboWidth, fboHeight);
             // 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, GL2ES2.GL_LINEAR, GL2ES2.GL_LINEAR, GL2ES2.GL_CLAMP_TO_EDGE, GL2ES2.GL_CLAMP_TO_EDGE);
+            // 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);
             if( !blendingEnabled ) {
                 // no depth-buffer w/ blending
diff --git a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2-vbaa_allequal.glsl b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2-vbaa_bforce_even.glsl
index 0272c1f9f..ba7611a06 100644
--- a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2-vbaa_allequal.glsl
+++ b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2-vbaa_bforce_even.glsl
@@ -13,77 +13,77 @@
         vec4 t;
 
         // SampleCount 2 -> 4x
-        t  = texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-0.5, -0.5)))*sample_weight; // NW
-        t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-0.5,  0.5)))*sample_weight; // SW
-        t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 0.5,  0.5)))*sample_weight; // SE
-        t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 0.5, -0.5)))*sample_weight; // NE
+        t  = texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-0.5, -0.5))*sample_weight; // NW
+        t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-0.5,  0.5))*sample_weight; // SW
+        t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 0.5,  0.5))*sample_weight; // SE
+        t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 0.5, -0.5))*sample_weight; // NE
         #if SAMPLE_COUNT > 2
             // SampleCount 4 -> +12x = 16p
-            t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-1.5, -1.5)))*sample_weight; // NW -> SW Edge
-            t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-1.5, -0.5)))*sample_weight;
-            t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-1.5,  0.5)))*sample_weight;
-            t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-1.5,  1.5)))*sample_weight; // SW -> SE Edge
-            t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-0.5,  1.5)))*sample_weight; //
-            t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 0.5,  1.5)))*sample_weight; //
-            t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 1.5,  1.5)))*sample_weight; // SE -> NE Edge
-            t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 1.5,  0.5)))*sample_weight; // 
-            t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 1.5, -0.5)))*sample_weight; // 
-            t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 1.5, -1.5)))*sample_weight; // NE -> NW Edge
-            t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 0.5, -1.5)))*sample_weight; //
-            t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-0.5, -1.5)))*sample_weight; // NW - 1 (closed)
+            t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-1.5, -1.5))*sample_weight; // NW -> SW Edge
+            t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-1.5, -0.5))*sample_weight;
+            t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-1.5,  0.5))*sample_weight;
+            t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-1.5,  1.5))*sample_weight; // SW -> SE Edge
+            t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-0.5,  1.5))*sample_weight; //
+            t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 0.5,  1.5))*sample_weight; //
+            t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 1.5,  1.5))*sample_weight; // SE -> NE Edge
+            t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 1.5,  0.5))*sample_weight; // 
+            t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 1.5, -0.5))*sample_weight; // 
+            t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 1.5, -1.5))*sample_weight; // NE -> NW Edge
+            t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 0.5, -1.5))*sample_weight; //
+            t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-0.5, -1.5))*sample_weight; // NW - 1 (closed)
 
             #if SAMPLE_COUNT > 4
                 // SampleCount 6 -> +20x = 36p
-                t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-2.5, -2.5)))*sample_weight; // NW -> SW Edge
-                t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-2.5, -1.5)))*sample_weight;
-                t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-2.5, -0.5)))*sample_weight;
-                t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-2.5,  0.5)))*sample_weight;
-                t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-2.5,  1.5)))*sample_weight;
-                t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-2.5,  2.5)))*sample_weight; // SW -> SE Edge
-                t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-1.5,  2.5)))*sample_weight;
-                t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-0.5,  2.5)))*sample_weight;
-                t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 0.5,  2.5)))*sample_weight;
-                t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 1.5,  2.5)))*sample_weight;
-                t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 2.5,  2.5)))*sample_weight; // SE -> NE Edge
-                t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 2.5,  1.5)))*sample_weight;
-                t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 2.5,  0.5)))*sample_weight;
-                t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 2.5, -0.5)))*sample_weight;
-                t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 2.5, -1.5)))*sample_weight;
-                t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 2.5, -2.5)))*sample_weight; // NE -> NW Edge
-                t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 1.5, -2.5)))*sample_weight;
-                t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 0.5, -2.5)))*sample_weight;
-                t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-0.5, -2.5)))*sample_weight;
-                t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-1.5, -2.5)))*sample_weight; // NW - 1 (closed)
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-2.5, -2.5))*sample_weight; // NW -> SW Edge
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-2.5, -1.5))*sample_weight;
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-2.5, -0.5))*sample_weight;
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-2.5,  0.5))*sample_weight;
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-2.5,  1.5))*sample_weight;
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-2.5,  2.5))*sample_weight; // SW -> SE Edge
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-1.5,  2.5))*sample_weight;
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-0.5,  2.5))*sample_weight;
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 0.5,  2.5))*sample_weight;
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 1.5,  2.5))*sample_weight;
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 2.5,  2.5))*sample_weight; // SE -> NE Edge
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 2.5,  1.5))*sample_weight;
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 2.5,  0.5))*sample_weight;
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 2.5, -0.5))*sample_weight;
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 2.5, -1.5))*sample_weight;
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 2.5, -2.5))*sample_weight; // NE -> NW Edge
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 1.5, -2.5))*sample_weight;
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 0.5, -2.5))*sample_weight;
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-0.5, -2.5))*sample_weight;
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-1.5, -2.5))*sample_weight; // NW - 1 (closed)
                 #if SAMPLE_COUNT > 6
                     // SampleCount 8 -> +28x = 64p
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-3.5, -3.5)))*sample_weight; // NW -> SW Edge
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-3.5, -2.5)))*sample_weight;
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-3.5, -1.5)))*sample_weight;
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-3.5, -0.5)))*sample_weight;
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-3.5,  0.5)))*sample_weight;
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-3.5,  1.5)))*sample_weight;
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-3.5,  2.5)))*sample_weight;
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-3.5,  3.5)))*sample_weight; // SW -> SE Edge
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-2.5,  3.5)))*sample_weight;
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-1.5,  3.5)))*sample_weight;
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-0.5,  3.5)))*sample_weight;
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 0.5,  3.5)))*sample_weight;
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 1.5,  3.5)))*sample_weight;
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 2.5,  3.5)))*sample_weight;
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 3.5,  3.5)))*sample_weight; // SE -> NE Edge
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 3.5,  2.5)))*sample_weight;
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 3.5,  1.5)))*sample_weight;
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 3.5,  0.5)))*sample_weight;
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 3.5, -0.5)))*sample_weight;
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 3.5, -1.5)))*sample_weight;
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 3.5, -2.5)))*sample_weight;
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 3.5, -3.5)))*sample_weight; // NE -> NW Edge
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 2.5, -3.5)))*sample_weight;
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 1.5, -3.5)))*sample_weight;
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2( 0.5, -3.5)))*sample_weight;
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-0.5, -3.5)))*sample_weight;
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-1.5, -3.5)))*sample_weight;
-                    t += texture2D(gcu_FboTexUnit, texCoord + psize*(vec2(-2.5, -3.5)))*sample_weight; // NW - 1 (closed)
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-3.5, -3.5))*sample_weight; // NW -> SW Edge
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-3.5, -2.5))*sample_weight;
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-3.5, -1.5))*sample_weight;
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-3.5, -0.5))*sample_weight;
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-3.5,  0.5))*sample_weight;
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-3.5,  1.5))*sample_weight;
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-3.5,  2.5))*sample_weight;
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-3.5,  3.5))*sample_weight; // SW -> SE Edge
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-2.5,  3.5))*sample_weight;
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-1.5,  3.5))*sample_weight;
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-0.5,  3.5))*sample_weight;
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 0.5,  3.5))*sample_weight;
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 1.5,  3.5))*sample_weight;
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 2.5,  3.5))*sample_weight;
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 3.5,  3.5))*sample_weight; // SE -> NE Edge
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 3.5,  2.5))*sample_weight;
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 3.5,  1.5))*sample_weight;
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 3.5,  0.5))*sample_weight;
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 3.5, -0.5))*sample_weight;
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 3.5, -1.5))*sample_weight;
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 3.5, -2.5))*sample_weight;
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 3.5, -3.5))*sample_weight; // NE -> NW Edge
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 2.5, -3.5))*sample_weight;
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 1.5, -3.5))*sample_weight;
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 0.5, -3.5))*sample_weight;
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-0.5, -3.5))*sample_weight;
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-1.5, -3.5))*sample_weight;
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-2.5, -3.5))*sample_weight; // NW - 1 (closed)
                 #endif
             #endif
         #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
new file mode 100644
index 000000000..7adf111d5
--- /dev/null
+++ b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass2-vbaa_bforce_odd.glsl
@@ -0,0 +1,87 @@
+        // Pass-2: AA on Texture
+        // Note: gcv_FboTexCoord is in center of sample pixels.
+
+        // float sample_count = gcu_FboTexSize.z;
+        vec2 psize = 1.0 / gcu_FboTexSize.xy; // pixel size
+
+        // Not only the poles (NW, SW, ..) but the whole edge!
+        const float sample_weight = 1.0 / ( sample_count * sample_count );
+
+        // const vec4 tex_weights = vec4(0.075, 0.06, 0.045, 0.025);
+        vec2 texCoord = gcv_FboTexCoord.st;
+
+        vec4 t;
+
+        // SampleCount 1 -> 1x (raster 1x1)
+        t += texture2D(gcu_FboTexUnit, texCoord)*sample_weight; // CENTER
+
+        #if SAMPLE_COUNT > 1
+            // SampleCount 3 -> +8x = 9p (raster 3x3)
+            t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-1.0, -1.0))*sample_weight; // top line
+            t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 0.0, -1.0))*sample_weight; // top line
+            t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 1.0, -1.0))*sample_weight; // top line
+            t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-1.0,  0.0))*sample_weight; // Center Left
+            t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 1.0,  0.0))*sample_weight; // Center Right
+            t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-1.0,  1.0))*sample_weight; // bottom line
+            t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 0.0,  1.0))*sample_weight; // bottom line
+            t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 1.0,  1.0))*sample_weight; // bottom line
+
+            #if SAMPLE_COUNT > 3
+                // SampleCount 5 -> +16x = 25p (raster 5x5)
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-2.0, -1.0))*sample_weight; // top line - 1
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 2.0, -1.0))*sample_weight; // top line - 1
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-2.0,  0.0))*sample_weight; // Center Left
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 2.0,  0.0))*sample_weight; // Center Right
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-2.0,  1.0))*sample_weight; // bottom line - 1
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 2.0,  1.0))*sample_weight; // bottom line - 1
+
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-2.0, -2.0))*sample_weight; // top line
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-1.0, -2.0))*sample_weight; // top line
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 0.0, -2.0))*sample_weight; // top line
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 1.0, -2.0))*sample_weight; // top line
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 2.0, -2.0))*sample_weight; // top line
+
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-2.0,  2.0))*sample_weight; // bottom line
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-1.0,  2.0))*sample_weight; // bottom line
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 0.0,  2.0))*sample_weight; // bottom line
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 1.0,  2.0))*sample_weight; // bottom line
+                t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 2.0,  2.0))*sample_weight; // bottom line
+
+                #if SAMPLE_COUNT > 5
+                    // SampleCount 7 -> +24x = 49p (raster 7x7)
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-3.0, -2.0))*sample_weight; // top line - 1
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 3.0, -2.0))*sample_weight; // top line - 1
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-3.0, -1.0))*sample_weight; // top line - 2
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 3.0, -1.0))*sample_weight; // top line - 2
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-3.0,  0.0))*sample_weight; // Center Left
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 3.0,  0.0))*sample_weight; // Center Right
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-3.0,  1.0))*sample_weight; // bottom line - 2
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 3.0,  1.0))*sample_weight; // bottom line - 2
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-3.0,  2.0))*sample_weight; // bottom line - 1
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 3.0,  2.0))*sample_weight; // bottom line - 1
+
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-3.0, -3.0))*sample_weight; // top line
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-2.0, -3.0))*sample_weight; // top line
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-1.0, -3.0))*sample_weight; // top line
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 0.0, -3.0))*sample_weight; // top line
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 1.0, -3.0))*sample_weight; // top line
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 2.0, -3.0))*sample_weight; // top line
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 3.0, -3.0))*sample_weight; // top line
+
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-3.0,  3.0))*sample_weight; // bottom line
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-2.0,  3.0))*sample_weight; // bottom line
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-1.0,  3.0))*sample_weight; // bottom line
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 0.0,  3.0))*sample_weight; // bottom line
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 1.0,  3.0))*sample_weight; // bottom line
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 2.0,  3.0))*sample_weight; // bottom line
+                    t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 3.0,  3.0))*sample_weight; // bottom line
+                #endif
+            #endif
+        #endif
+        #if 0
+        if(t.w == 0.0){
+            discard; // discard freezes NV tegra2 compiler
+        }
+        #endif
+        
+        mgl_FragColor = t;
diff --git a/src/test/com/jogamp/opengl/test/junit/graph/demos/GPUUISceneGLListener0A.java b/src/test/com/jogamp/opengl/test/junit/graph/demos/GPUUISceneGLListener0A.java
index 45ed14f7b..784fe1009 100644
--- a/src/test/com/jogamp/opengl/test/junit/graph/demos/GPUUISceneGLListener0A.java
+++ b/src/test/com/jogamp/opengl/test/junit/graph/demos/GPUUISceneGLListener0A.java
@@ -309,16 +309,12 @@ public class GPUUISceneGLListener0A implements GLEventListener {
                         int sampleCount = sceneUIController.getSampleCount();
                         if( shapeEvent.objPos[0] < shapeEvent.shape.getBounds().getCenter()[0] ) {
                             // left-half pressed
-                            if( sampleCount > 0 ) {
-                                sampleCount-=1;
-                            }
+                            sampleCount--;
                         } else {
                             // right-half pressed
-                            if( sampleCount < 8 ) {
-                                sampleCount+=1;
-                            }
+                            sampleCount++;
                         }
-                        sceneUIController.setSampleCount(sampleCount);
+                        sampleCount = sceneUIController.setSampleCount(sampleCount); // validated / clipped
                     }
                 } } );
             button.addMouseListener(dragZoomRotateListener);
diff --git a/src/test/com/jogamp/opengl/test/junit/graph/demos/ui/SceneUIController.java b/src/test/com/jogamp/opengl/test/junit/graph/demos/ui/SceneUIController.java
index 008d4e038..3d4865b5d 100644
--- a/src/test/com/jogamp/opengl/test/junit/graph/demos/ui/SceneUIController.java
+++ b/src/test/com/jogamp/opengl/test/junit/graph/demos/ui/SceneUIController.java
@@ -99,7 +99,11 @@ public class SceneUIController implements GLEventListener{
     }
 
     public int getSampleCount() { return sampleCount[0]; }
-    public void setSampleCount(final int v) { sampleCount[0]=v; markAllShapesDirty(); }
+    public int setSampleCount(final int v) {
+        sampleCount[0] = Math.min(8, Math.max(v, 1)); // clip
+        markAllShapesDirty();
+        return sampleCount[0];
+    }
 
     public void setAllShapesQuality(final int q) {
         for(int i=0; i<shapes.size(); i++) {