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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
#ifndef SEEN_SP_GRADIENT_H
#define SEEN_SP_GRADIENT_H
/** \file
* SVG <stop> <linearGradient> and <radialGradient> implementation
*
* Authors:
* Lauris Kaplinski <lauris@kaplinski.com>
* Johan Engelen <j.b.c.engelen@ewi.utwente.nl>
* Jon A. Cruz <jon@joncruz.org>
*
* Copyrigt (C) 2010 Jon A. Cruz
* Copyright (C) 2007 Johan Engelen
* Copyright (C) 1999-2002 Lauris Kaplinski
* Copyright (C) 2000-2001 Ximian, Inc.
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include <gdk/gdk.h>
#include <glibmm/ustring.h>
#include <2geom/affine.h>
#include "sp-paint-server.h"
#include "sp-gradient-spread.h"
#include "sp-gradient-units.h"
#include "sp-gradient-vector.h"
#include <stddef.h>
#include <sigc++/connection.h>
struct SPGradientReference;
#define SP_TYPE_GRADIENT (SPGradient::getType())
#define SP_GRADIENT(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), SP_TYPE_GRADIENT, SPGradient))
#define SP_GRADIENT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), SP_TYPE_GRADIENT, SPGradientClass))
#define SP_IS_GRADIENT(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj), SP_TYPE_GRADIENT))
#define SP_IS_GRADIENT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), SP_TYPE_GRADIENT))
typedef enum {
SP_GRADIENT_TYPE_UNKNOWN,
SP_GRADIENT_TYPE_LINEAR,
SP_GRADIENT_TYPE_RADIAL
} SPGradientType;
typedef enum {
SP_GRADIENT_STATE_UNKNOWN,
SP_GRADIENT_STATE_VECTOR,
SP_GRADIENT_STATE_PRIVATE
} SPGradientState;
typedef enum {
POINT_LG_BEGIN =0, //start enum at 0 (for indexing into gr_knot_shapes array for example)
POINT_LG_END,
POINT_LG_MID,
POINT_RG_CENTER,
POINT_RG_R1,
POINT_RG_R2,
POINT_RG_FOCUS,
POINT_RG_MID1,
POINT_RG_MID2,
// insert new point types here.
POINT_G_INVALID
} GrPointType;
/**
* Gradient
*
* Implement spread, stops list
* \todo fixme: Implement more here (Lauris)
*/
struct SPGradient : public SPPaintServer {
/** Reference (href) */
SPGradientReference *ref;
/** State in Inkscape gradient system */
guint state : 2;
private:
/** gradientUnits attribute */
SPGradientUnits units;
guint units_set : 1;
public:
/** gradientTransform attribute */
Geom::Affine gradientTransform;
guint gradientTransform_set : 1;
private:
/** spreadMethod attribute */
SPGradientSpread spread;
guint spread_set : 1;
/** Gradient stops */
guint has_stops : 1;
public:
/** Composed vector */
SPGradientVector vector;
sigc::connection modified_connection;
bool hasStops() const;
SPStop* getFirstStop();
int getStopCount() const;
bool isUnitsSet() const;
SPGradientUnits getUnits() const;
void setUnits(SPGradientUnits units);
bool isSpreadSet() const;
SPGradientSpread getSpread() const;
/**
* Returns private vector of given gradient (the gradient at the end of the href chain which has
* stops), optionally normalizing it.
*
* \pre SP_IS_GRADIENT(gradient).
* \pre There exists a gradient in the chain that has stops.
*/
SPGradient *getVector(bool force_private = false);
static GType getType();
/** Forces vector to be built, if not present (i.e. changed) */
void ensureVector();
/** Ensures that color array is populated */
void ensureColors();
/**
* Set spread property of gradient and emit modified.
*/
void setSpread(SPGradientSpread spread);
SPGradientSpread fetchSpread();
SPGradientUnits fetchUnits();
void setSwatch(bool swatch = true);
private:
bool invalidateVector();
void rebuildVector();
friend class SPGradientImpl;
friend class SPLGPainter;
friend class SPRGPainter;
};
/**
* The SPGradient vtable.
*/
struct SPGradientClass {
SPPaintServerClass parent_class;
};
#include "sp-gradient-fns.h"
#endif // SEEN_SP_GRADIENT_H
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
|