Fix Bug 711: Align Graphs's Curve Shader programmatically to used GL/GLSL version, following all other internal GLSL usage utilizing ShaderCode.

1 files changed, 48 insertions, 0 deletions

diff --git a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-1pass.fp b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-1pass.fp
new file mode 100644
index 000000000..b978b62d1
--- /dev/null
+++ b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-1pass.fp
@@ -0,0 +1,48 @@
+//Copyright 2010 JogAmp Community. All rights reserved.
+
+//
+// 1-pass shader w/o weight
+//
+
+#if __VERSION__ >= 130
+  out vec4 mgl_FragColor;
+#else
+  #define mgl_FragColor gl_FragColor
+#endif
+
+#include uniforms.glsl
+#include varyings.glsl
+
+void main (void)
+{
+    vec2 rtex = vec2(abs(gcv_TexCoord.x),abs(gcv_TexCoord.y));
+    vec3 c = gcu_ColorStatic.rgb;
+    
+    float alpha = 0.0;
+    
+    if((gcv_TexCoord.x == 0.0) && (gcv_TexCoord.y == 0.0)) {
+         alpha = gcu_Alpha;
+    }
+    else if ((gcv_TexCoord.x > 0.0) && (rtex.y > 0.0 || rtex.x == 1.0)) {
+        rtex.y -= 0.1;
+          
+        if(rtex.y < 0.0 && gcv_TexCoord.y < 0.0) {
+            // discard; // freezes NV tegra2 compiler
+            alpha = 0.0;
+        } else {
+            rtex.y = max(rtex.y, 0.0);
+
+            vec2 dtx = dFdx(rtex);
+            vec2 dty = dFdy(rtex);
+              
+            vec2 f = vec2((dtx.y - dtx.x + 2.0*rtex.x*dtx.x), (dty.y - dty.x + 2.0*rtex.x*dty.x));
+            float position = rtex.y - (rtex.x * (1.0 - rtex.x));
+
+            // FIXME: will we ever set gcu_Alpha != 1.0 ? If not, a==alpha!
+            float a = clamp(0.5 - ( position/length(f) ) * sign(gcv_TexCoord.y), 0.0, 1.0);
+            alpha = gcu_Alpha * a;
+        }
+    }
+    
+    mgl_FragColor = vec4(c, alpha);
+}