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
|
/*
Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
2004, 2005 Rob Buis <buis@kde.org>
2005 Eric Seidel <eric@webkit.org>
2009 Dirk Schulze <krit@webkit.org>
2010 Renata Hodovan <reni@inf.u-szeged.hu>
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
aint 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.
*/
#ifndef SVGFETurbulence_h
#define SVGFETurbulence_h
#if ENABLE(SVG) && ENABLE(FILTERS)
#include "FilterEffect.h"
#include "Filter.h"
namespace WebCore {
enum TurbulanceType {
FETURBULENCE_TYPE_UNKNOWN = 0,
FETURBULENCE_TYPE_FRACTALNOISE = 1,
FETURBULENCE_TYPE_TURBULENCE = 2
};
class FETurbulence : public FilterEffect {
public:
static PassRefPtr<FETurbulence> create(TurbulanceType, float, float, int, float, bool);
TurbulanceType type() const;
void setType(TurbulanceType);
float baseFrequencyY() const;
void setBaseFrequencyY(float);
float baseFrequencyX() const;
void setBaseFrequencyX(float);
float seed() const;
void setSeed(float);
int numOctaves() const;
void setNumOctaves(bool);
bool stitchTiles() const;
void setStitchTiles(bool);
void apply(Filter*);
void dump();
TextStream& externalRepresentation(TextStream&, int indent) const;
private:
static const int s_blockSize = 256;
static const int s_blockMask = s_blockSize - 1;
struct PaintingData {
long seed;
int latticeSelector[2 * s_blockSize + 2];
float gradient[4][2 * s_blockSize + 2][2];
int width; // How much to subtract to wrap for stitching.
int height;
int wrapX; // Minimum value to wrap.
int wrapY;
int channel;
IntSize filterSize;
PaintingData(long paintingSeed, const IntSize& paintingSize);
inline long random();
};
FETurbulence(TurbulanceType, float, float, int, float, bool);
inline void initPaint(PaintingData&);
float noise2D(PaintingData&, const FloatPoint&);
unsigned char calculateTurbulenceValueForPoint(PaintingData&, const FloatPoint&);
TurbulanceType m_type;
float m_baseFrequencyX;
float m_baseFrequencyY;
int m_numOctaves;
float m_seed;
bool m_stitchTiles;
};
} // namespace WebCore
#endif // ENABLE(SVG) && ENABLE(FILTERS)
#endif // SVGFETurbulence_h
|
