Rework the SVGPathSource interface

Source/core/svg/SVGPathSeg.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2008 Rob Buis <buis@kde.org>
  *
  * 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 SVGPathSeg_h
 #define SVGPathSeg_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
+#include "platform/geometry/FloatPoint.h"
 #include "platform/heap/Handle.h"
 #include "wtf/RefCounted.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 enum ListModification {
     ListModificationUnknown = 0,
     ListModificationInsert = 1,
     ListModificationReplace = 2,
@@ skipping 17 matching lines @@
     PathSegLineToHorizontalAbs = 12,
     PathSegLineToHorizontalRel = 13,
     PathSegLineToVerticalAbs = 14,
     PathSegLineToVerticalRel = 15,
     PathSegCurveToCubicSmoothAbs = 16,
     PathSegCurveToCubicSmoothRel = 17,
     PathSegCurveToQuadraticSmoothAbs = 18,
     PathSegCurveToQuadraticSmoothRel = 19
 };
 
+static inline SVGPathSegType toAbsolutePathSegType(const SVGPathSegType type)
+{
+    // Clear the LSB to get the absolute command.
+    return type >= PathSegMoveToAbs ? static_cast<SVGPathSegType>(type & ~1u) : type;
+}
+
+static inline bool isAbsolutePathSegType(const SVGPathSegType type)
+{
+    // For commands with an ordinal >= PathSegMoveToAbs, and odd number => relative command.
+    return type < PathSegMoveToAbs || type % 2 == 0;
+}
+
+struct PathSegmentData {
+    PathSegmentData()
+        : command(PathSegUnknown)
+        , arcSweep(false)
+        , arcLarge(false)
+    {
+    }
+
+    const FloatPoint& arcRadii() const { return point1; }
+    float arcAngle() const { return point2.x(); }
+
+    SVGPathSegType command;
+    FloatPoint targetPoint;
+    FloatPoint point1;
+    FloatPoint point2;
+    bool arcSweep;
+    bool arcLarge;
+};
+
 class SVGPropertyBase;
 class SVGPathElement;
 class SVGElement;
 
 class SVGPathSeg : public RefCountedWillBeGarbageCollectedFinalized<SVGPathSeg>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
     // SVGPathSeg itself is used as a tear-off type.
     // FIXME: A tear-off type should be introduced to distinguish animVal/baseVal
     typedef SVGPathSeg TearOffType;
@@ skipping 85 matching lines @@
     }
 
 private:
     float m_x;
     float m_y;
 };
 
 } // namespace blink
 
 #endif // SVGPathSeg_h