remove prototype pathops code

experimental/Intersection/SkAntiEdge.h

-/*
- * Copyright 2011 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-#ifndef SkAntiEdge_DEFINED
-#define SkAntiEdge_DEFINED
-
-#include "SkFixed.h"
-#include "SkTDArray.h"
-
-struct SkBitmap;
-struct SkPoint;
-
-struct SkAntiEdge {
-    SkAntiEdge* fNext; // list in walking order (y, then x, then diag)
-    SkAntiEdge* fPrev; // reverse in walking order
-    SkAntiEdge* fLink; // list in connected order, top to bottom
-
-    SkFixed     fFirstX; // starting X
-    SkFixed     fFirstY; // starting Y
-    SkFixed     fLastX; // ending X
-    SkFixed     fLastY; // ending Y
-    SkFixed     fX0; // computed edge current value (may be off end)
-    SkFixed     fY0;
-    SkFixed     fX; // edge current value (always on edge)
-    SkFixed     fY;
-    SkFixed     fDX; // change in X per unit step in Y
-    SkFixed     fDY; // change in Y per unit step in X
-    SkFixed     fWalkX; // unit step position (integer after initial step)
-    SkFixed     fWalkY;
-    uint16_t    fPartialY; // initial partial coverage in Y (0 .. SkFixed1]
-    int16_t     fWindingSum; // winding including contributions to the left
-    int8_t      fWinding; // 1 or -1 (could be 2 bits)
-    bool        fFinished : 1;
-    unsigned    fDXFlipped : 1; // used as bool and to adjust calculations (0/1)
-    bool        fLinkSet : 1; // set if edge has been attached to another edge
-
-    void calcLine();
-    bool setLine(const SkPoint& p0, const SkPoint& p1);
-    uint16_t advanceX(SkFixed left);
-    uint16_t advanceFlippedX(SkFixed left);
-    void advanceY(SkFixed top);
-// FIXME: mark DEBUG
-    void pointInLine(SkFixed x, SkFixed y);
-    void pointOnLine(SkFixed x, SkFixed y);
-    void validate();
-};
-
-class SkAntiEdgeBuilder {
-public:
-void process(const SkPoint* points, int ptCount,
-        uint8_t* result, int pixelCol, int pixelRow);
-private:
-    int build(const SkPoint pts[], int count);
-    void calc();
-    void link();
-    void sort();
-    void sort(SkTDArray<SkAntiEdge*>&);
-    void split();
-    void split(SkAntiEdge* edge, SkFixed y);
-    void walk(uint8_t* result, int rowBytes, int height);
-    SkAntiEdge fHeadEdge;
-    SkAntiEdge fTailEdge;
-    SkTDArray<SkAntiEdge> fEdges;
-    SkTDArray<SkAntiEdge*> fList;
-};
-
-void SkAntiEdge_Test();
-void CreateSweep(SkBitmap* , float width);
-void CreateHorz(SkBitmap* );
-void CreateVert(SkBitmap* );
-void CreateAngle(SkBitmap* sweep, float angle);
-
-#endif