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
28namespace blink {
29
30class SVGPathByteStreamSource FINAL : public SVGPathSource {
31public:
32    explicit SVGPathByteStreamSource(const SVGPathByteStream*);
33
34private:
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