Add flipped gradient branch to two point conical gradient

src/effects/gradients/SkTwoPointConicalGradient.h

 
 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkTwoPointConicalGradient_DEFINED
 #define SkTwoPointConicalGradient_DEFINED
 
 #include "SkGradientShaderPriv.h"
 
 struct TwoPtRadial {
     enum {
         kDontDrawT  = 0x80000000
     };
 
     float   fCenterX, fCenterY;
     float   fDCenterX, fDCenterY;
     float   fRadius;
     float   fDRadius;
     float   fA;
     float   fRadius2;
     float   fRDR;
+    bool    fFlipped;
 
     void init(const SkPoint& center0, SkScalar rad0,
-              const SkPoint& center1, SkScalar rad1);
+              const SkPoint& center1, SkScalar rad1,
+              bool flipped);
 
     // used by setup and nextT
     float   fRelX, fRelY, fIncX, fIncY;
     float   fB, fDB;
 
     void setup(SkScalar fx, SkScalar fy, SkScalar dfx, SkScalar dfy);
     SkFixed nextT();
 
     static bool DontDrawT(SkFixed t) {
         return kDontDrawT == (uint32_t)t;
     }
 };
 
 
 class SkTwoPointConicalGradient : public SkGradientShaderBase {
     TwoPtRadial fRec;
     void init();
 
 public:
     SkTwoPointConicalGradient(const SkPoint& start, SkScalar startRadius,
                               const SkPoint& end, SkScalar endRadius,
-                              const Descriptor&);
+                              bool flippedGrad, const Descriptor&);
 
     virtual void shadeSpan(int x, int y, SkPMColor* dstCParam,
                            int count) SK_OVERRIDE;
     virtual bool setContext(const SkBitmap& device,
                             const SkPaint& paint,
                             const SkMatrix& matrix) SK_OVERRIDE;
 
     virtual BitmapType asABitmap(SkBitmap* bitmap,
                                  SkMatrix* matrix,
                                  TileMode* xy) const;
     virtual SkShader::GradientType asAGradient(GradientInfo* info) const  SK_OVERRIDE;
     virtual GrEffectRef* asNewEffect(GrContext* context, const SkPaint& paint) const SK_OVERRIDE;
     virtual bool isOpaque() const SK_OVERRIDE;
 
     SkScalar getCenterX1() const { return SkPoint::Distance(fCenter1, fCenter2); }
     SkScalar getStartRadius() const { return fRadius1; }
     SkScalar getDiffRadius() const { return fRadius2 - fRadius1; }
     const SkPoint& getStartCenter() const { return fCenter1; }
     const SkPoint& getEndCenter() const { return fCenter2; }
     SkScalar getEndRadius() const { return fRadius2; }
+    bool isFlippedGrad() const { return fFlippedGrad; }
 
     SK_TO_STRING_OVERRIDE()
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTwoPointConicalGradient)
 
 protected:
     SkTwoPointConicalGradient(SkReadBuffer& buffer);
     virtual void flatten(SkWriteBuffer& buffer) const SK_OVERRIDE;
 
 private:
+    SkPoint fCenter1;
+    SkPoint fCenter2;
+    SkScalar fRadius1;
+    SkScalar fRadius2;
+    bool fFlippedGrad;
+    
     typedef SkGradientShaderBase INHERITED;
-    const SkPoint fCenter1;
-    const SkPoint fCenter2;
-    const SkScalar fRadius1;
-    const SkScalar fRadius2;
 };
 
 #endif