1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/*
* Copyright (C) Research In Motion Limited 2010. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "core/svg/SVGPathByteStreamBuilder.h"
#include "core/svg/SVGPathSeg.h"
#include "wtf/OwnPtr.h"
namespace blink {
// Helper class that coalesces writes to a SVGPathByteStream to a local buffer.
class CoalescingBuffer {
public:
CoalescingBuffer(SVGPathByteStream& byteStream)
: m_currentOffset(0)
, m_byteStream(byteStream)
{
}
~CoalescingBuffer()
{
for (size_t i = 0; i < m_currentOffset; ++i)
m_byteStream.append(m_bytes[i]);
}
template<typename DataType>
void writeType(DataType value)
{
ByteType<DataType> data;
data.value = value;
size_t typeSize = sizeof(ByteType<DataType>);
ASSERT(m_currentOffset + typeSize <= sizeof(m_bytes));
memcpy(m_bytes + m_currentOffset, data.bytes, typeSize);
m_currentOffset += typeSize;
}
void writeFlag(bool value) { writeType<bool>(value); }
void writeFloat(float value) { writeType<float>(value); }
void writeFloatPoint(const FloatPoint& point)
{
writeType<float>(point.x());
writeType<float>(point.y());
}
void writeSegmentType(unsigned short value) { writeType<unsigned short>(value); }
private:
// Adjust size to fit the largest command (in serialized/byte-stream format).
// Currently a cubic segment.
size_t m_currentOffset;
unsigned char m_bytes[sizeof(unsigned short) + sizeof(FloatPoint) * 3];
SVGPathByteStream& m_byteStream;
};
SVGPathByteStreamBuilder::SVGPathByteStreamBuilder(SVGPathByteStream& byteStream)
: m_byteStream(byteStream)
{
}
void SVGPathByteStreamBuilder::moveTo(const FloatPoint& targetPoint, bool, PathCoordinateMode mode)
{
CoalescingBuffer buffer(m_byteStream);
buffer.writeSegmentType(mode == RelativeCoordinates ? PathSegMoveToRel : PathSegMoveToAbs);
buffer.writeFloatPoint(targetPoint);
}
void SVGPathByteStreamBuilder::lineTo(const FloatPoint& targetPoint, PathCoordinateMode mode)
{
CoalescingBuffer buffer(m_byteStream);
buffer.writeSegmentType(mode == RelativeCoordinates ? PathSegLineToRel : PathSegLineToAbs);
buffer.writeFloatPoint(targetPoint);
}
void SVGPathByteStreamBuilder::lineToHorizontal(float x, PathCoordinateMode mode)
{
CoalescingBuffer buffer(m_byteStream);
buffer.writeSegmentType(mode == RelativeCoordinates ? PathSegLineToHorizontalRel : PathSegLineToHorizontalAbs);
buffer.writeFloat(x);
}
void SVGPathByteStreamBuilder::lineToVertical(float y, PathCoordinateMode mode)
{
CoalescingBuffer buffer(m_byteStream);
buffer.writeSegmentType(mode == RelativeCoordinates ? PathSegLineToVerticalRel : PathSegLineToVerticalAbs);
buffer.writeFloat(y);
}
void SVGPathByteStreamBuilder::curveToCubic(const FloatPoint& point1, const FloatPoint& point2, const FloatPoint& targetPoint, PathCoordinateMode mode)
{
CoalescingBuffer buffer(m_byteStream);
buffer.writeSegmentType(mode == RelativeCoordinates ? PathSegCurveToCubicRel : PathSegCurveToCubicAbs);
buffer.writeFloatPoint(point1);
buffer.writeFloatPoint(point2);
buffer.writeFloatPoint(targetPoint);
}
void SVGPathByteStreamBuilder::curveToCubicSmooth(const FloatPoint& point2, const FloatPoint& targetPoint, PathCoordinateMode mode)
{
CoalescingBuffer buffer(m_byteStream);
buffer.writeSegmentType(mode == RelativeCoordinates ? PathSegCurveToCubicSmoothRel : PathSegCurveToCubicSmoothAbs);
buffer.writeFloatPoint(point2);
buffer.writeFloatPoint(targetPoint);
}
void SVGPathByteStreamBuilder::curveToQuadratic(const FloatPoint& point1, const FloatPoint& targetPoint, PathCoordinateMode mode)
{
CoalescingBuffer buffer(m_byteStream);
buffer.writeSegmentType(mode == RelativeCoordinates ? PathSegCurveToQuadraticRel : PathSegCurveToQuadraticAbs);
buffer.writeFloatPoint(point1);
buffer.writeFloatPoint(targetPoint);
}
void SVGPathByteStreamBuilder::curveToQuadraticSmooth(const FloatPoint& targetPoint, PathCoordinateMode mode)
{
CoalescingBuffer buffer(m_byteStream);
buffer.writeSegmentType(mode == RelativeCoordinates ? PathSegCurveToQuadraticSmoothRel : PathSegCurveToQuadraticSmoothAbs);
buffer.writeFloatPoint(targetPoint);
}
void SVGPathByteStreamBuilder::arcTo(float r1, float r2, float angle, bool largeArcFlag, bool sweepFlag, const FloatPoint& targetPoint, PathCoordinateMode mode)
{
CoalescingBuffer buffer(m_byteStream);
buffer.writeSegmentType(mode == RelativeCoordinates ? PathSegArcRel : PathSegArcAbs);
buffer.writeFloat(r1);
buffer.writeFloat(r2);
buffer.writeFloat(angle);
buffer.writeFlag(largeArcFlag);
buffer.writeFlag(sweepFlag);
buffer.writeFloatPoint(targetPoint);
}
void SVGPathByteStreamBuilder::closePath()
{
CoalescingBuffer buffer(m_byteStream);
buffer.writeSegmentType(PathSegClosePath);
}
} // namespace blink
|
