[SkSVGDevice] Initial clipping support

include/core/SkClipStack.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 SkClipStack_DEFINED
 #define SkClipStack_DEFINED
 
@@ skipping 305 matching lines @@
      */
     bool intersectRectWithClip(SkRect* devRect) const;
 
     /**
      * Returns true if the input rect in device space is entirely contained
      * by the clip. A return value of false does not guarantee that the rect
      * is not contained by the clip.
      */
     bool quickContains(const SkRect& devRect) const;
 
+    /**
+     * Flattens the clip stack into a single SkPath. Returns true if any of
+     * the clip stack components requires anti-aliasing.
+     */
+    bool asPath(SkPath* path) const;
+
     void clipDevRect(const SkIRect& ir, SkRegion::Op op) {
         SkRect r;
         r.set(ir);
         this->clipDevRect(r, op, false);
     }
     void clipDevRect(const SkRect&, SkRegion::Op, bool doAA);
     void clipDevRRect(const SkRRect&, SkRegion::Op, bool doAA);
     void clipDevPath(const SkPath&, SkRegion::Op, bool doAA);
     // An optimized version of clipDevRect(emptyRect, kIntersect, ...)
     void clipEmpty();
@@ skipping 134 matching lines @@
      */
     void restoreTo(int saveCount);
 
     /**
      * Return the next unique generation ID.
      */
     static int32_t GetNextGenID();
 };
 
 #endif