Home | History | Annotate | Download | only in svg 
      1 /*
      2  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
      3  *
      4  * This library is free software; you can redistribute it and/or
      5  * modify it under the terms of the GNU Library General Public
      6  * License as published by the Free Software Foundation; either
      7  * version 2 of the License, or (at your option) any later version.
      8  *
      9  * This library is distributed in the hope that it will be useful,
     10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12  * Library General Public License for more details.
     13  *
     14  * You should have received a copy of the GNU Library General Public License
     15  * along with this library; see the file COPYING.LIB.  If not, write to
     16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     17  * Boston, MA 02110-1301, USA.
     18  */
     19 
     20 #ifndef SVGPathByteStreamBuilder_h
     21 #define SVGPathByteStreamBuilder_h
     22 
     23 #include "core/platform/graphics/FloatPoint.h"
     24 #include "core/svg/SVGPathByteStream.h"
     25 #include "core/svg/SVGPathConsumer.h"
     26 #include "wtf/PassOwnPtr.h"
     27 #include "wtf/text/WTFString.h"
     28 
     29 namespace WebCore {
     30 
     31 class SVGPathByteStreamBuilder : public SVGPathConsumer {
     32 public:
     33     SVGPathByteStreamBuilder();
     34 
     35     void setCurrentByteStream(SVGPathByteStream* byteStream) { m_byteStream = byteStream; }
     36 
     37 private:
     38     virtual void incrementPathSegmentCount() { }
     39     virtual bool continueConsuming() { return true; }
     40     virtual void cleanup() { m_byteStream = 0; }
     41 
     42     // Used in UnalteredParsing/NormalizedParsing modes.
     43     virtual void moveTo(const FloatPoint&, bool closed, PathCoordinateMode);
     44     virtual void lineTo(const FloatPoint&, PathCoordinateMode);
     45     virtual void curveToCubic(const FloatPoint&, const FloatPoint&, const FloatPoint&, PathCoordinateMode);
     46     virtual void closePath();
     47 
     48     // Only used in UnalteredParsing mode.
     49     virtual void lineToHorizontal(float, PathCoordinateMode);
     50     virtual void lineToVertical(float, PathCoordinateMode);
     51     virtual void curveToCubicSmooth(const FloatPoint&, const FloatPoint&, PathCoordinateMode);
     52     virtual void curveToQuadratic(const FloatPoint&, const FloatPoint&, PathCoordinateMode);
     53     virtual void curveToQuadraticSmooth(const FloatPoint&, PathCoordinateMode);
     54     virtual void arcTo(float, float, float, bool largeArcFlag, bool sweepFlag, const FloatPoint&, PathCoordinateMode);
     55 
     56     template<typename ByteType>
     57     void writeType(const ByteType& type)
     58     {
     59         size_t typeSize = sizeof(ByteType);
     60         for (size_t i = 0; i < typeSize; ++i)
     61             m_byteStream->append(type.bytes[i]);
     62     }
     63 
     64     void writeFlag(bool value)
     65     {
     66         BoolByte data;
     67         data.value = value;
     68         writeType(data);
     69     }
     70 
     71     void writeFloat(float value)
     72     {
     73         FloatByte data;
     74         data.value = value;
     75         writeType(data);
     76     }
     77 
     78     void writeFloatPoint(const FloatPoint& point)
     79     {
     80         writeFloat(point.x());
     81         writeFloat(point.y());
     82     }
     83 
     84     void writeSegmentType(unsigned short value)
     85     {
     86         UnsignedShortByte data;
     87         data.value = value;
     88         writeType(data);
     89     }
     90 
     91     SVGPathByteStream* m_byteStream;
     92 };
     93 
     94 } // namespace WebCore
     95 
     96 #endif // SVGPathByteStreamBuilder_h
     97