Add intersections for path ops

src/pathops/SkReduceOrder.h

Index: src/pathops/SkReduceOrder.h
===================================================================
--- src/pathops/SkReduceOrder.h	(revision 0)
+++ src/pathops/SkReduceOrder.h	(revision 0)
@@ -0,0 +1,38 @@
+/*
+ * 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 SkReduceOrder_DEFINED
+#define SkReduceOrder_DEFINED
+
+#include "SkPath.h"
+#include "SkPathOpsCubic.h"
+#include "SkPathOpsLine.h"
+#include "SkPathOpsQuad.h"
+#include "SkTDArray.h"
+
+union SkReduceOrder {
+    enum Quadratics {
+        kNo_Quadratics,
+        kAllow_Quadratics
+    };
+    enum Style {
+        kStroke_Style,
+        kFill_Style
+    };
+
+    int reduce(const SkDCubic& cubic, Quadratics, Style);
+    int reduce(const SkDLine& line);
+    int reduce(const SkDQuad& quad, Style);
+
+    static SkPath::Verb Cubic(const SkPoint pts[4], SkTDArray<SkPoint>* reducePts);
+    static SkPath::Verb Quad(const SkPoint pts[3], SkTDArray<SkPoint>* reducePts);
+
+    SkDLine fLine;
+    SkDQuad fQuad;
+    SkDCubic fCubic;
+};
+
+#endif