remove prototype pathops code

experimental/Intersection/Intersections.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 Intersections_DEFINE
-#define Intersections_DEFINE
-
-class Intersections {
-public:
-    Intersections()
-        : fFlip(0)
-#ifdef SK_DEBUG
-        , fDepth(0)
-#endif
-        , fSwap(0)
-    {
-#ifdef SK_DEBUG
-        bzero(fPt, sizeof(fPt));
-        bzero(fT, sizeof(fT));
-        bzero(fIsCoincident, sizeof(fIsCoincident));
-#endif
-        reset();
-    }
-
-    int coincidentUsed() const {
-        if (!fIsCoincident[0]) {
-            SkASSERT(!fIsCoincident[0]);
-            return 0;
-        }
-        int count = 0;
-        SkDEBUGCODE(int count2 = 0;)
-        for (int index = 0; index < fUsed; ++index) {
-            if (fIsCoincident[0] & (1 << index)) {
-                ++count;
-            }
-    #ifdef SK_DEBUG
-            if (fIsCoincident[1] & (1 << index)) {
-                ++count2;
-            }
-    #endif
-        }
-        SkASSERT(count == count2);
-        return count;
-    }
-
-    void offset(int base, double start, double end) {
-        for (int index = base; index < fUsed; ++index) {
-            double val = fT[fSwap][index];
-            val *= end - start;
-            val += start;
-            fT[fSwap][index] = val;
-        }
-    }
-
-    // FIXME : does not respect swap
-    int insert(double one, double two, const _Point& pt);
-
-    // start if index == 0 : end if index == 1
-    void insertCoincident(double one, double two, const _Point& pt) {
-        int index = insertSwap(one, two, pt);
-        int bit = 1 << index;
-        fIsCoincident[0] |= bit;
-        fIsCoincident[1] |= bit;
-    }
-
-    void insertCoincidentPair(double s1, double e1, double s2, double e2,
-            const _Point& startPt, const _Point& endPt);
-
-    int insertSwap(double one, double two, const _Point& pt) {
-        if (fSwap) {
-            return insert(two, one, pt);
-        } else {
-            return insert(one, two, pt);
-        }
-    }
-
-    bool intersected() const {
-        return fUsed > 0;
-    }
-
-    void removeOne(int index);
-
-    // leaves flip, swap alone
-    void reset() {
-        fUsed = 0;
-        fUnsortable = false;
-    }
-
-    void swap() {
-        fSwap ^= true;
-    }
-
-    void swapPts() {
-        int index;
-        for (index = 0; index < fUsed; ++index) {
-            SkTSwap(fT[0][index], fT[1][index]);
-        }
-    }
-
-    bool swapped() const {
-        return fSwap;
-    }
-
-    bool unsortable() const {
-        return fUnsortable;
-    }
-
-    int used() const {
-        return fUsed;
-    }
-
-    void downDepth() {
-        SkASSERT(--fDepth >= 0);
-    }
-
-    void upDepth() {
-        SkASSERT(++fDepth < 16);
-    }
-
-#ifdef SK_DEBUG
-    int depth() const {
-        return fDepth;
-    }
-#endif
-
-    _Point fPt[9];
-    double fT[2][9];
-    unsigned short fIsCoincident[2]; // bit arrays, one bit set for each coincident T
-    unsigned char fUsed;
-    bool fFlip;
-    bool fUnsortable;
-#ifdef SK_DEBUG
-    int fDepth;
-#endif
-protected:
-    // used by addCoincident to remove ordinary intersections in range
-    void remove(double one, double two, const _Point& startPt, const _Point& endPt);
-private:
-    bool fSwap;
-};
-
-#endif