1 #define __SP_FEOFFSET_CPP__
3 /** \file
4 * SVG <feOffset> implementation.
5 *
6 */
7 /*
8 * Authors:
9 * hugo Rodrigues <haa.rodrigues@gmail.com>
10 * Niko Kiirala <niko@kiirala.com>
11 *
12 * Copyright (C) 2006,2007 authors
13 *
14 * Released under GNU GPL, read the file 'COPYING' for more information
15 */
17 #ifdef HAVE_CONFIG_H
18 # include "config.h"
19 #endif
21 #include "attributes.h"
22 #include "svg/svg.h"
23 #include "sp-feoffset.h"
24 #include "helper-fns.h"
25 #include "xml/repr.h"
26 #include "display/nr-filter-offset.h"
28 /* FeOffset base class */
30 static void sp_feOffset_class_init(SPFeOffsetClass *klass);
31 static void sp_feOffset_init(SPFeOffset *feOffset);
33 static void sp_feOffset_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
34 static void sp_feOffset_release(SPObject *object);
35 static void sp_feOffset_set(SPObject *object, unsigned int key, gchar const *value);
36 static void sp_feOffset_update(SPObject *object, SPCtx *ctx, guint flags);
37 static Inkscape::XML::Node *sp_feOffset_write(SPObject *object, Inkscape::XML::Node *repr, guint flags);
38 static void sp_feOffset_build_renderer(SPFilterPrimitive *primitive, NR::Filter *filter);
40 static SPFilterPrimitiveClass *feOffset_parent_class;
42 GType
43 sp_feOffset_get_type()
44 {
45 static GType feOffset_type = 0;
47 if (!feOffset_type) {
48 GTypeInfo feOffset_info = {
49 sizeof(SPFeOffsetClass),
50 NULL, NULL,
51 (GClassInitFunc) sp_feOffset_class_init,
52 NULL, NULL,
53 sizeof(SPFeOffset),
54 16,
55 (GInstanceInitFunc) sp_feOffset_init,
56 NULL, /* value_table */
57 };
58 feOffset_type = g_type_register_static(SP_TYPE_FILTER_PRIMITIVE, "SPFeOffset", &feOffset_info, (GTypeFlags)0);
59 }
60 return feOffset_type;
61 }
63 static void
64 sp_feOffset_class_init(SPFeOffsetClass *klass)
65 {
66 SPObjectClass *sp_object_class = (SPObjectClass *)klass;
67 SPFilterPrimitiveClass *sp_primitive_class = (SPFilterPrimitiveClass *)klass;
69 feOffset_parent_class = (SPFilterPrimitiveClass*)g_type_class_peek_parent(klass);
71 sp_object_class->build = sp_feOffset_build;
72 sp_object_class->release = sp_feOffset_release;
73 sp_object_class->write = sp_feOffset_write;
74 sp_object_class->set = sp_feOffset_set;
75 sp_object_class->update = sp_feOffset_update;
77 sp_primitive_class->build_renderer = sp_feOffset_build_renderer;
78 }
80 static void
81 sp_feOffset_init(SPFeOffset *feOffset)
82 {
83 feOffset->dx = 0;
84 feOffset->dy = 0;
85 }
87 /**
88 * Reads the Inkscape::XML::Node, and initializes SPFeOffset variables. For this to get called,
89 * our name must be associated with a repr via "sp_object_type_register". Best done through
90 * sp-object-repr.cpp's repr_name_entries array.
91 */
92 static void
93 sp_feOffset_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
94 {
95 if (((SPObjectClass *) feOffset_parent_class)->build) {
96 ((SPObjectClass *) feOffset_parent_class)->build(object, document, repr);
97 }
99 sp_object_read_attr(object, "dx");
100 sp_object_read_attr(object, "dy");
101 }
103 /**
104 * Drops any allocated memory.
105 */
106 static void
107 sp_feOffset_release(SPObject *object)
108 {
109 if (((SPObjectClass *) feOffset_parent_class)->release)
110 ((SPObjectClass *) feOffset_parent_class)->release(object);
111 }
113 /**
114 * Sets a specific value in the SPFeOffset.
115 */
116 static void
117 sp_feOffset_set(SPObject *object, unsigned int key, gchar const *value)
118 {
119 SPFeOffset *feOffset = SP_FEOFFSET(object);
121 double read_num;
122 switch(key) {
123 case SP_ATTR_DX:
124 read_num = helperfns_read_number(value);
125 if (read_num != feOffset->dx) {
126 feOffset->dx = read_num;
127 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
128 }
129 break;
130 case SP_ATTR_DY:
131 read_num = helperfns_read_number(value);
132 if (read_num != feOffset->dy) {
133 feOffset->dy = read_num;
134 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
135 }
136 break;
138 /*DEAL WITH SETTING ATTRIBUTES HERE*/
139 default:
140 if (((SPObjectClass *) feOffset_parent_class)->set)
141 ((SPObjectClass *) feOffset_parent_class)->set(object, key, value);
142 break;
143 }
145 }
147 /**
148 * Receives update notifications.
149 */
150 static void
151 sp_feOffset_update(SPObject *object, SPCtx *ctx, guint flags)
152 {
153 if (flags & SP_OBJECT_MODIFIED_FLAG) {
154 sp_object_read_attr(object, "dx");
155 sp_object_read_attr(object, "dy");
156 }
158 if (((SPObjectClass *) feOffset_parent_class)->update) {
159 ((SPObjectClass *) feOffset_parent_class)->update(object, ctx, flags);
160 }
161 }
163 /**
164 * Writes its settings to an incoming repr object, if any.
165 */
166 static Inkscape::XML::Node *
167 sp_feOffset_write(SPObject *object, Inkscape::XML::Node *repr, guint flags)
168 {
169 // Inkscape-only object, not copied during an "plain SVG" dump:
170 if (flags & SP_OBJECT_WRITE_EXT) {
171 if (repr) {
172 // is this sane?
173 // Not. Causes coredumps.
174 // repr->mergeFrom(SP_OBJECT_REPR(object), "id");
175 } else {
176 repr = SP_OBJECT_REPR(object)->duplicate(NULL); // FIXME
177 }
178 }
180 if (((SPObjectClass *) feOffset_parent_class)->write) {
181 ((SPObjectClass *) feOffset_parent_class)->write(object, repr, flags);
182 }
184 return repr;
185 }
187 static void sp_feOffset_build_renderer(SPFilterPrimitive *primitive, NR::Filter *filter) {
188 g_assert(primitive != NULL);
189 g_assert(filter != NULL);
191 SPFeOffset *sp_offset = SP_FEOFFSET(primitive);
193 int primitive_n = filter->add_primitive(NR::NR_FILTER_OFFSET);
194 NR::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
195 NR::FilterOffset *nr_offset = dynamic_cast<NR::FilterOffset*>(nr_primitive);
196 g_assert(nr_offset != NULL);
198 sp_filter_primitive_renderer_common(primitive, nr_primitive);
200 nr_offset->set_dx(sp_offset->dx);
201 nr_offset->set_dy(sp_offset->dy);
202 }
205 /*
206 Local Variables:
207 mode:c++
208 c-file-style:"stroustrup"
209 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
210 indent-tabs-mode:nil
211 fill-column:99
212 End:
213 */
214 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :