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      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 SVGPathByteStreamSource_h
     21 #define SVGPathByteStreamSource_h
     22 
     23 #include "core/svg/SVGPathByteStream.h"
     24 #include "core/svg/SVGPathSource.h"
     25 #include "platform/geometry/FloatPoint.h"
     26 #include "wtf/PassOwnPtr.h"
     27 
     28 namespace blink {
     29 
     30 class SVGPathByteStreamSource FINAL : public SVGPathSource {
     31 public:
     32     explicit SVGPathByteStreamSource(const SVGPathByteStream*);
     33 
     34 private:
     35     virtual bool hasMoreData() const OVERRIDE;
     36     virtual bool moveToNextToken() OVERRIDE { return true; }
     37     virtual bool parseSVGSegmentType(SVGPathSegType&) OVERRIDE;
     38     virtual SVGPathSegType nextCommand(SVGPathSegType) OVERRIDE;
     39 
     40     virtual bool parseMoveToSegment(FloatPoint&) OVERRIDE;
     41     virtual bool parseLineToSegment(FloatPoint&) OVERRIDE;
     42     virtual bool parseLineToHorizontalSegment(float&) OVERRIDE;
     43     virtual bool parseLineToVerticalSegment(float&) OVERRIDE;
     44     virtual bool parseCurveToCubicSegment(FloatPoint&, FloatPoint&, FloatPoint&) OVERRIDE;
     45     virtual bool parseCurveToCubicSmoothSegment(FloatPoint&, FloatPoint&) OVERRIDE;
     46     virtual bool parseCurveToQuadraticSegment(FloatPoint&, FloatPoint&) OVERRIDE;
     47     virtual bool parseCurveToQuadraticSmoothSegment(FloatPoint&) OVERRIDE;
     48     virtual bool parseArcToSegment(float&, float&, float&, bool&, bool&, FloatPoint&) OVERRIDE;
     49 
     50 #if COMPILER(MSVC)
     51 #pragma warning(disable: 4701)
     52 #endif
     53     template<typename DataType>
     54     DataType readType()
     55     {
     56         ByteType<DataType> data;
     57         size_t typeSize = sizeof(ByteType<DataType>);
     58         ASSERT(m_streamCurrent + typeSize <= m_streamEnd);
     59         memcpy(data.bytes, m_streamCurrent, typeSize);
     60         m_streamCurrent += typeSize;
     61         return data.value;
     62     }
     63 
     64     bool readFlag() { return readType<bool>(); }
     65     float readFloat() { return readType<float>(); }
     66     unsigned short readSVGSegmentType() { return readType<unsigned short>(); }
     67     FloatPoint readFloatPoint()
     68     {
     69         float x = readType<float>();
     70         float y = readType<float>();
     71         return FloatPoint(x, y);
     72     }
     73 
     74     SVGPathByteStream::DataIterator m_streamCurrent;
     75     SVGPathByteStream::DataIterator m_streamEnd;
     76 };
     77 
     78 } // namespace blink
     79 
     80 #endif // SVGPathByteStreamSource_h
     81