pathops work in progress

src/pathops/SkIntersections.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkIntersections.h"
 
+void SkIntersections::append(const SkIntersections& i) {
+    for (int index = 0; index < i.fUsed; ++index) {
+        insert(i[0][index], i[1][index], i.pt(index));
+    }
+}
+
 int (SkIntersections::*CurveVertical[])(const SkPoint[], SkScalar, SkScalar, SkScalar, bool) = {
     NULL,
     &SkIntersections::verticalLine,
     &SkIntersections::verticalQuad,
     &SkIntersections::verticalCubic
 };
 
 int (SkIntersections::*CurveRay[])(const SkPoint[], const SkDLine&) = {
     NULL,
-    NULL,
+    &SkIntersections::lineRay,
     &SkIntersections::quadRay,
     &SkIntersections::cubicRay
 };
 
 int SkIntersections::coincidentUsed() const {
     if (!fIsCoincident[0]) {
         SkASSERT(!fIsCoincident[1]);
         return 0;
     }
     int count = 0;
@@ skipping 89 matching lines @@
     fIsNear |= 1 << index;
 }
 
 void SkIntersections::insertCoincident(double one, double two, const SkDPoint& pt) {
     int index = insertSwap(one, two, pt);
     int bit = 1 << index;
     fIsCoincident[0] |= bit;
     fIsCoincident[1] |= bit;
 }
 
+int SkIntersections::lineRay(const SkPoint pts[2], const SkDLine& line) {
+    SkDLine l;
+    l.set(pts);
+    fMax = 2;
+    return intersectRay(l, line);
+}
+
 void SkIntersections::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;
     }
 }
 
 int SkIntersections::quadRay(const SkPoint pts[3], const SkDLine& line) {
@@ skipping 59 matching lines @@
     quad.set(a);
     return vertical(quad, top, bottom, x, flipped);
 }
 
 int SkIntersections::verticalCubic(const SkPoint a[4], SkScalar top, SkScalar bottom,
         SkScalar x, bool flipped) {
     SkDCubic cubic;
     cubic.set(a);
     return vertical(cubic, top, bottom, x, flipped);
 }