1 #ifndef SEEN_SP_GRADIENT_H
2 #define SEEN_SP_GRADIENT_H
4 /** \file
5 * SVG <stop> <linearGradient> and <radialGradient> implementation
6 *
7 * Authors:
8 * Lauris Kaplinski <lauris@kaplinski.com>
9 * Johan Engelen <j.b.c.engelen@ewi.utwente.nl>
10 * Jon A. Cruz <jon@joncruz.org>
11 *
12 * Copyrigt (C) 2010 Jon A. Cruz
13 * Copyright (C) 2007 Johan Engelen
14 * Copyright (C) 1999-2002 Lauris Kaplinski
15 * Copyright (C) 2000-2001 Ximian, Inc.
16 *
17 * Released under GNU GPL, read the file 'COPYING' for more information
18 */
20 #include <gdk/gdktypes.h>
21 #include "libnr/nr-matrix.h"
22 #include "sp-paint-server.h"
23 #include "sp-gradient-spread.h"
24 #include "sp-gradient-units.h"
25 #include "sp-gradient-vector.h"
27 #include <sigc++/connection.h>
29 struct SPGradientReference;
32 #define SP_TYPE_GRADIENT (sp_gradient_get_type())
33 #define SP_GRADIENT(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), SP_TYPE_GRADIENT, SPGradient))
34 #define SP_GRADIENT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), SP_TYPE_GRADIENT, SPGradientClass))
35 #define SP_IS_GRADIENT(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj), SP_TYPE_GRADIENT))
36 #define SP_IS_GRADIENT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), SP_TYPE_GRADIENT))
38 GType sp_gradient_get_type();
40 typedef enum {
41 SP_GRADIENT_TYPE_UNKNOWN,
42 SP_GRADIENT_TYPE_LINEAR,
43 SP_GRADIENT_TYPE_RADIAL
44 } SPGradientType;
46 typedef enum {
47 SP_GRADIENT_STATE_UNKNOWN,
48 SP_GRADIENT_STATE_VECTOR,
49 SP_GRADIENT_STATE_PRIVATE
50 } SPGradientState;
52 typedef enum {
53 POINT_LG_BEGIN =0, //start enum at 0 (for indexing into gr_knot_shapes array for example)
54 POINT_LG_END,
55 POINT_LG_MID,
56 POINT_RG_CENTER,
57 POINT_RG_R1,
58 POINT_RG_R2,
59 POINT_RG_FOCUS,
60 POINT_RG_MID1,
61 POINT_RG_MID2,
62 // insert new point types here.
64 POINT_G_INVALID
65 } GrPointType;
67 /**
68 * Gradient
69 *
70 * Implement spread, stops list
71 * \todo fixme: Implement more here (Lauris)
72 */
73 struct SPGradient : public SPPaintServer {
75 /** Reference (href) */
76 SPGradientReference *ref;
78 /** State in Inkscape gradient system */
79 guint state : 2;
81 /** gradientUnits attribute */
82 SPGradientUnits units;
83 guint units_set : 1;
85 /** gradientTransform attribute */
86 Geom::Matrix gradientTransform;
87 guint gradientTransform_set : 1;
89 /** spreadMethod attribute */
90 SPGradientSpread spread;
91 guint spread_set : 1;
93 /** Gradient stops */
94 guint has_stops : 1;
96 /** Composed vector */
97 SPGradientVector vector;
99 /** Rendered color array (4 * 1024 bytes) */
100 guchar *color;
102 sigc::connection modified_connection;
105 SPStop* getFirstStop();
106 int getStopCount() const;
108 /**
109 * Returns private vector of given gradient (the gradient at the end of the href chain which has
110 * stops), optionally normalizing it.
111 *
112 * \pre SP_IS_GRADIENT(gradient).
113 * \pre There exists a gradient in the chain that has stops.
114 */
115 SPGradient *getVector(bool force_private = false);
116 };
118 /**
119 * The SPGradient vtable.
120 */
121 struct SPGradientClass {
122 SPPaintServerClass parent_class;
123 };
126 #include "sp-gradient-fns.h"
128 #endif // SEEN_SP_GRADIENT_H
130 /*
131 Local Variables:
132 mode:c++
133 c-file-style:"stroustrup"
134 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
135 indent-tabs-mode:nil
136 fill-column:99
137 End:
138 */
139 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :