[SVG] Paint unnormalized paths

third_party/WebKit/Source/core/svg/SVGPathBuilder.h

 /*
  * Copyright (C) 2002, 2003 The Karbon Developers
  * Copyright (C) 2006 Alexander Kellett <lypanov@kde.org>
  * Copyright (C) 2006, 2007 Rob Buis <buis@kde.org>
  * Copyright (C) 2007, 2009 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #ifndef SVGPathBuilder_h
 #define SVGPathBuilder_h
 
 #include "core/svg/SVGPathConsumer.h"
+#include "core/svg/SVGPathData.h"
+#include "platform/geometry/FloatPoint.h"
 
 namespace blink {
 
+class FloatSize;
 class Path;
 
 class SVGPathBuilder final : public SVGPathConsumer {
 public:
-    SVGPathBuilder(Path& path) : m_path(path) { }
+    SVGPathBuilder(Path& path)
+        : m_path(path)
+        // Starting in ClosePath state ensures correct handling of the first moveTo.
+        , m_lastCommand(PathSegClosePath)
+    { }
 
 private:
     void emitSegment(const PathSegmentData&) override;
 
+    void emitClose();
+    void emitMoveTo(const FloatPoint&);
+    void emitLineTo(const FloatPoint&);
+    void emitQuadTo(const FloatPoint&, const FloatPoint&);
+    void emitSmoothQuadTo(const FloatPoint&);
+    void emitCubicTo(const FloatPoint&, const FloatPoint&, const FloatPoint&);
+    void emitSmoothCubicTo(const FloatPoint&, const FloatPoint&);
+    void emitArcTo(const FloatPoint&, const FloatSize&, float, bool largeArc, bool sweep);
+
+    FloatPoint smoothControl(bool isSmooth) const;
+
     Path& m_path;
+
+    SVGPathSegType m_lastCommand;
+    FloatPoint m_subpathPoint;
+    FloatPoint m_currentPoint;
+    FloatPoint m_lastControlPoint;
 };
 
 } // namespace blink
 
 #endif // SVGPathBuilder_h