Bug 801: Revise Graph VBAA (Add border dropping MSAA; Test diff. AA modes incl. FXAA2) ; Test exp. LineAA ; Misc Changes

- Revise VBAA
  - Add border to FBO dropping MSAA
    - This automatically gives AA for edges on FBO boundary

  - Correcting ceil-diff, use object-diff instead of win-diff (diff := ceil(a)-a, w/ float a)

  - Reorg shader - using includes to test diff. AA modes:
    - [poles, wholeedge] * [equalweight, propweight]
    - fxaa2

- Exp. LineAA (disabled)
  - Test ROESSLER-2012-OGLES for detected rectangles only
  - Test boundary line detection

See screenshots: <http://jogamp.org/files/screenshots/graphui/20140322/>

1 files changed, 21 insertions, 0 deletions

diff --git a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass1-curve-simple.glsl b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass1-curve-simple.glsl
new file mode 100644
index 000000000..df53db686
--- /dev/null
+++ b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-pass1-curve-simple.glsl
@@ -0,0 +1,21 @@
+
+    if( gcv_TexCoord.x == 0.0 && gcv_TexCoord.y == 0.0 ) {
+        // pass-1: Lines
+        // color = vec3(0, 1.0, 0);
+        color = gcu_ColorStatic.rgb;
+        alpha = 1.0;
+    } else {
+        // pass-1: curves
+        const vec2 rtex = vec2( abs(gcv_TexCoord.x), abs(gcv_TexCoord.y) - 0.1 );
+
+        const vec2 dtx = dFdx(rtex);
+        const vec2 dty = dFdy(rtex);
+          
+        const vec2 f = vec2((dtx.y - dtx.x + 2.0*rtex.x*dtx.x), (dty.y - dty.x + 2.0*rtex.x*dty.x));
+        const float position = rtex.y - (rtex.x * (1.0 - rtex.x));
+
+        // color = vec3(1.0, 0, 0);
+        color = gcu_ColorStatic.rgb;
+        alpha = clamp(0.5 - ( position/length(f) ) * sign(gcv_TexCoord.y), 0.0, 1.0);
+    }
+