Pull out Effect Shaders in GPU Path Renderer

src/gpu/GrPathUtils.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrPathUtils.h"
 
 #include "GrPoint.h"
@@ skipping 621 matching lines @@
 
     m[0] = ls * ms * ms;
     m[1] = (ms * (ls * (2.f * mt - 3.f * ms) + lt * ms))/-3.f;
     m[2] = ((mt - ms) * (ls * (mt - 3.f * ms) + 2.f * lt * ms))/3.f;
     m[3] = -1.f * (lt - ls) * (mt - ms) * (mt - ms);
 
 
     // If (d0 < 0 && sign(k1) > 0) || (d0 > 0 && sign(k1) < 0),
     // we need to flip the orientation of our curve.
     // This is done by negating the k and l values
-    if ( (d[0] < 0 && k[1] < 0) || (d[0] > 0 && k[1] > 0)) {
+    if ( (d[0] < 0 && k[1] > 0) || (d[0] > 0 && k[1] < 0)) {
         for (int i = 0; i < 4; ++i) {
             k[i] = -k[i];
             l[i] = -l[i];
         }
     }
 }
 
 static void set_cusp_klm(const SkScalar d[3], SkScalar k[4], SkScalar l[4], SkScalar m[4]) {
     const SkScalar ls = d[2];
     const SkScalar lt = 3.f * d[1];
@@ skipping 178 matching lines @@
         set_loop_klm(d, controlK, controlL, controlM);
     } else if (kCusp_CubicType == cType) {
         SkASSERT(0.f == d[0]);
         set_cusp_klm(d, controlK, controlL, controlM);
     } else if (kQuadratic_CubicType == cType) {
         set_quadratic_klm(d, controlK, controlL, controlM);
     }
 
     calc_cubic_klm(p, controlK, controlL, controlM, klm, &klm[3], &klm[6]);
 }