Compute exact bounds for SVGPathElement::getBBox()

third_party/WebKit/Source/platform/graphics/Path.h

 /*
  * Copyright (C) 2003, 2006, 2009 Apple Inc. All rights reserved.
  *               2006 Rob Buis <buis@kde.org>
  * Copyright (C) 2007-2008 Torch Mobile, Inc.
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 60 matching lines @@
 
     Path(const Path&);
     Path(const SkPath&);
     Path& operator=(const Path&);
     Path& operator=(const SkPath&);
     bool operator==(const Path&) const;
 
     bool contains(const FloatPoint&) const;
     bool contains(const FloatPoint&, WindRule) const;
     bool strokeContains(const FloatPoint&, const StrokeData&) const;
-    FloatRect boundingRect() const;
-    FloatRect strokeBoundingRect(const StrokeData&) const;
+
+    enum class BoundsType {
+        Conservative, // Fast version, includes control points.
+        Exact, // Tight, slower version.
+    };
+    FloatRect boundingRect(BoundsType = BoundsType::Conservative) const;
+    FloatRect strokeBoundingRect(const StrokeData&, BoundsType = BoundsType::Conservative) const;
 
     float length() const;
     FloatPoint pointAtLength(float length) const;
     void pointAndNormalAtLength(float length, FloatPoint&, float&) const;
 
     // Helper for computing a sequence of positions and normals (normal angles) on a path.
     // The best possible access pattern will be one where the |length| value is
     // strictly increasing.
     // For other access patterns, performance will vary depending on curvature
     // and number of segments, but should never be worse than that of the
@@ skipping 67 matching lines @@
     SkPath m_path;
 };
 
 #if ENABLE(ASSERT)
 PLATFORM_EXPORT bool ellipseIsRenderable(float startAngle, float endAngle);
 #endif
 
 } // namespace blink
 
 #endif