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 #if ENABLE(SVG)
24 #include "FloatPoint.h"
25 #include "SVGPathByteStream.h"
26 #include "SVGPathSource.h"
27 #include <wtf/PassOwnPtr.h>
28 
29 namespace WebCore {
30 
31 class SVGPathByteStreamSource : public SVGPathSource {
32 public:
create(SVGPathByteStream * stream)33     static PassOwnPtr<SVGPathByteStreamSource> create(SVGPathByteStream* stream)
34     {
35         return adoptPtr(new SVGPathByteStreamSource(stream));
36     }
37 
38 private:
39     SVGPathByteStreamSource(SVGPathByteStream*);
40 
41     virtual bool hasMoreData() const;
moveToNextToken()42     virtual bool moveToNextToken() { return true; }
43     virtual bool parseSVGSegmentType(SVGPathSegType&);
44     virtual SVGPathSegType nextCommand(SVGPathSegType);
45 
46     virtual bool parseMoveToSegment(FloatPoint&);
47     virtual bool parseLineToSegment(FloatPoint&);
48     virtual bool parseLineToHorizontalSegment(float&);
49     virtual bool parseLineToVerticalSegment(float&);
50     virtual bool parseCurveToCubicSegment(FloatPoint&, FloatPoint&, FloatPoint&);
51     virtual bool parseCurveToCubicSmoothSegment(FloatPoint&, FloatPoint&);
52     virtual bool parseCurveToQuadraticSegment(FloatPoint&, FloatPoint&);
53     virtual bool parseCurveToQuadraticSmoothSegment(FloatPoint&);
54     virtual bool parseArcToSegment(float&, float&, float&, bool&, bool&, FloatPoint&);
55 
56 #if COMPILER(MSVC)
57 #pragma warning(disable: 4701)
58 #endif
59     template<typename DataType, typename ByteType>
readType()60     DataType readType()
61     {
62         ByteType data;
63         size_t typeSize = sizeof(ByteType);
64 
65         for (size_t i = 0; i < typeSize; ++i) {
66             ASSERT(m_streamCurrent < m_streamEnd);
67             data.bytes[i] = *m_streamCurrent;
68             ++m_streamCurrent;
69         }
70 
71         return data.value;
72     }
73 
readFlag()74     bool readFlag()
75     {
76         return readType<bool, BoolByte>();
77     }
78 
readFloat()79     float readFloat()
80     {
81         return readType<float, FloatByte>();
82     }
83 
readSVGSegmentType()84     unsigned short readSVGSegmentType()
85     {
86         return readType<unsigned short, UnsignedShortByte>();
87     }
88 
readFloatPoint()89     FloatPoint readFloatPoint()
90     {
91         float x = readType<float, FloatByte>();
92         float y = readType<float, FloatByte>();
93         return FloatPoint(x, y);
94     }
95 
96     SVGPathByteStream* m_stream;
97     SVGPathByteStream::DataIterator m_streamCurrent;
98     SVGPathByteStream::DataIterator m_streamEnd;
99 };
100 
101 } // namespace WebCore
102 
103 #endif // ENABLE(SVG)
104 #endif // SVGPathByteStreamSource_h
105