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#if ENABLE(SVG)
24#include "FloatPoint.h"
25#include "PlatformString.h"
26#include "SVGPathByteStream.h"
27#include "SVGPathConsumer.h"
28#include <wtf/PassOwnPtr.h>
29
30namespace WebCore {
31
32class SVGPathByteStreamBuilder : public SVGPathConsumer {
33public:
34    SVGPathByteStreamBuilder();
35
36    void setCurrentByteStream(SVGPathByteStream* byteStream) { m_byteStream = byteStream; }
37
38private:
39    virtual void incrementPathSegmentCount() { }
40    virtual bool continueConsuming() { return true; }
41    virtual void cleanup() { m_byteStream = 0; }
42
43    // Used in UnalteredParsing/NormalizedParsing modes.
44    virtual void moveTo(const FloatPoint&, bool closed, PathCoordinateMode);
45    virtual void lineTo(const FloatPoint&, PathCoordinateMode);
46    virtual void curveToCubic(const FloatPoint&, const FloatPoint&, const FloatPoint&, PathCoordinateMode);
47    virtual void closePath();
48
49    // Only used in UnalteredParsing mode.
50    virtual void lineToHorizontal(float, PathCoordinateMode);
51    virtual void lineToVertical(float, PathCoordinateMode);
52    virtual void curveToCubicSmooth(const FloatPoint&, const FloatPoint&, PathCoordinateMode);
53    virtual void curveToQuadratic(const FloatPoint&, const FloatPoint&, PathCoordinateMode);
54    virtual void curveToQuadraticSmooth(const FloatPoint&, PathCoordinateMode);
55    virtual void arcTo(float, float, float, bool largeArcFlag, bool sweepFlag, const FloatPoint&, PathCoordinateMode);
56
57    template<typename ByteType>
58    void writeType(const ByteType& type)
59    {
60        size_t typeSize = sizeof(ByteType);
61        for (size_t i = 0; i < typeSize; ++i)
62            m_byteStream->append(type.bytes[i]);
63    }
64
65    void writeFlag(bool value)
66    {
67        BoolByte data;
68        data.value = value;
69        writeType(data);
70    }
71
72    void writeFloat(float value)
73    {
74        FloatByte data;
75        data.value = value;
76        writeType(data);
77    }
78
79    void writeFloatPoint(const FloatPoint& point)
80    {
81        writeFloat(point.x());
82        writeFloat(point.y());
83    }
84
85    void writeSegmentType(unsigned short value)
86    {
87        UnsignedShortByte data;
88        data.value = value;
89        writeType(data);
90    }
91
92    SVGPathByteStream* m_byteStream;
93};
94
95} // namespace WebCore
96
97#endif // ENABLE(SVG)
98#endif // SVGPathByteStreamBuilder_h
99