Add base effect for gpu 2pt conical gradients

src/effects/gradients/SkTwoPointConicalGradient_gpu.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkTwoPointConicalGradient_gpu_DEFINED
 #define SkTwoPointConicalGradient_gpu_DEFINED
 
-#if SK_SUPPORT_GPU
-
 #include "SkGradientShaderPriv.h"
 
 class GrEffectRef;
 class SkTwoPointConicalGradient;
-class GrGL2PtConicalGradientEffect;
 
-class Gr2PtConicalGradientEffect : public GrGradientEffect {
-public:
+namespace Gr2PtConicalGradientEffect {
+    /**
+     * Creates an effect that produces a two point conical gradient based on the
+     * shader passed in.
+     */
+    GrEffectRef* Create(GrContext* ctx, const SkTwoPointConicalGradient& shader,
+                        SkShader::TileMode tm);
+};
 
-    static GrEffectRef* Create(GrContext* ctx,
-                               const SkTwoPointConicalGradient& shader,
-                               const SkMatrix& matrix,
-                               SkShader::TileMode tm) {
-        AutoEffectUnref effect(SkNEW_ARGS(Gr2PtConicalGradientEffect, (ctx, shader, matrix, tm)));
-        return CreateEffectRef(effect);
-    }
+#endif
 
-    virtual ~Gr2PtConicalGradientEffect() { }
-
-    static const char* Name() { return "Two-Point Conical Gradient"; }
-    virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE;
-
-    // The radial gradient parameters can collapse to a linear (instead of quadratic) equation.
-    bool isDegenerate() const { return SkScalarAbs(fDiffRadius) == SkScalarAbs(fCenterX1); }
-    SkScalar center() const { return fCenterX1; }
-    SkScalar diffRadius() const { return fDiffRadius; }
-    SkScalar radius() const { return fRadius0; }
-
-    typedef GrGL2PtConicalGradientEffect GLEffect;
-
-private:
-    virtual bool onIsEqual(const GrEffect& sBase) const SK_OVERRIDE {
-        const Gr2PtConicalGradientEffect& s = CastEffect<Gr2PtConicalGradientEffect>(sBase);
-        return (INHERITED::onIsEqual(sBase) &&
-                this->fCenterX1 == s.fCenterX1 &&
-                this->fRadius0 == s.fRadius0 &&
-                this->fDiffRadius == s.fDiffRadius);
-    }
-
-    Gr2PtConicalGradientEffect(GrContext* ctx,
-                       const SkTwoPointConicalGradient& shader,
-                       const SkMatrix& matrix,
-                       SkShader::TileMode tm);
-
-    GR_DECLARE_EFFECT_TEST;
-
-    // @{
-    // Cache of values - these can change arbitrarily, EXCEPT
-    // we shouldn't change between degenerate and non-degenerate?!
-
-    GrCoordTransform fBTransform;
-    SkScalar         fCenterX1;
-    SkScalar         fRadius0;
-    SkScalar         fDiffRadius;
-
-    // @}
-
-    typedef GrGradientEffect INHERITED;
-};
-#endif
-#endif