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 "xml/repr.h"
25 #include "display/nr-filter-offset.h"
27 /* FeOffset base class */
29 static void sp_feOffset_class_init(SPFeOffsetClass *klass);
30 static void sp_feOffset_init(SPFeOffset *feOffset);
32 static void sp_feOffset_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
33 static void sp_feOffset_release(SPObject *object);
34 static void sp_feOffset_set(SPObject *object, unsigned int key, gchar const *value);
35 static void sp_feOffset_update(SPObject *object, SPCtx *ctx, guint flags);
36 static Inkscape::XML::Node *sp_feOffset_write(SPObject *object, Inkscape::XML::Node *repr, guint flags);
37 static void sp_feOffset_build_renderer(SPFilterPrimitive *primitive, NR::Filter *filter);
39 static SPFilterPrimitiveClass *feOffset_parent_class;
41 GType
42 sp_feOffset_get_type()
43 {
44 static GType feOffset_type = 0;
46 if (!feOffset_type) {
47 GTypeInfo feOffset_info = {
48 sizeof(SPFeOffsetClass),
49 NULL, NULL,
50 (GClassInitFunc) sp_feOffset_class_init,
51 NULL, NULL,
52 sizeof(SPFeOffset),
53 16,
54 (GInstanceInitFunc) sp_feOffset_init,
55 NULL, /* value_table */
56 };
57 feOffset_type = g_type_register_static(SP_TYPE_FILTER_PRIMITIVE, "SPFeOffset", &feOffset_info, (GTypeFlags)0);
58 }
59 return feOffset_type;
60 }
62 static void
63 sp_feOffset_class_init(SPFeOffsetClass *klass)
64 {
65 SPObjectClass *sp_object_class = (SPObjectClass *)klass;
66 SPFilterPrimitiveClass *sp_primitive_class = (SPFilterPrimitiveClass *)klass;
68 feOffset_parent_class = (SPFilterPrimitiveClass*)g_type_class_peek_parent(klass);
70 sp_object_class->build = sp_feOffset_build;
71 sp_object_class->release = sp_feOffset_release;
72 sp_object_class->write = sp_feOffset_write;
73 sp_object_class->set = sp_feOffset_set;
74 sp_object_class->update = sp_feOffset_update;
76 sp_primitive_class->build_renderer = sp_feOffset_build_renderer;
77 }
79 static void
80 sp_feOffset_init(SPFeOffset *feOffset)
81 {
82 feOffset->dx = 0;
83 feOffset->dy = 0;
84 }
86 /**
87 * Reads the Inkscape::XML::Node, and initializes SPFeOffset variables. For this to get called,
88 * our name must be associated with a repr via "sp_object_type_register". Best done through
89 * sp-object-repr.cpp's repr_name_entries array.
90 */
91 static void
92 sp_feOffset_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
93 {
94 if (((SPObjectClass *) feOffset_parent_class)->build) {
95 ((SPObjectClass *) feOffset_parent_class)->build(object, document, repr);
96 }
98 sp_object_read_attr(object, "dx");
99 sp_object_read_attr(object, "dy");
100 }
102 /**
103 * Drops any allocated memory.
104 */
105 static void
106 sp_feOffset_release(SPObject *object)
107 {
108 if (((SPObjectClass *) feOffset_parent_class)->release)
109 ((SPObjectClass *) feOffset_parent_class)->release(object);
110 }
112 double sp_feOffset_read_number(gchar const *value) {
113 char *end;
114 double ret = g_ascii_strtod(value, &end);
115 if (*end) {
116 g_warning("Unable to convert \"%s\" to number", value);
117 // We could leave this out, too. If strtod can't convert
118 // anything, it will return zero.
119 ret = 0;
120 }
121 return ret;
122 }
124 /**
125 * Sets a specific value in the SPFeOffset.
126 */
127 static void
128 sp_feOffset_set(SPObject *object, unsigned int key, gchar const *value)
129 {
130 SPFeOffset *feOffset = SP_FEOFFSET(object);
132 switch(key) {
133 case SP_ATTR_DX:
134 feOffset->dx = sp_feOffset_read_number(value);
135 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
136 break;
137 case SP_ATTR_DY:
138 feOffset->dy = sp_feOffset_read_number(value);
139 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
140 break;
142 /*DEAL WITH SETTING ATTRIBUTES HERE*/
143 default:
144 if (((SPObjectClass *) feOffset_parent_class)->set)
145 ((SPObjectClass *) feOffset_parent_class)->set(object, key, value);
146 break;
147 }
149 }
151 /**
152 * Receives update notifications.
153 */
154 static void
155 sp_feOffset_update(SPObject *object, SPCtx *ctx, guint flags)
156 {
157 if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG |
158 SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
160 /* do something to trigger redisplay, updates? */
162 }
164 if (((SPObjectClass *) feOffset_parent_class)->update) {
165 ((SPObjectClass *) feOffset_parent_class)->update(object, ctx, flags);
166 }
167 }
169 /**
170 * Writes its settings to an incoming repr object, if any.
171 */
172 static Inkscape::XML::Node *
173 sp_feOffset_write(SPObject *object, Inkscape::XML::Node *repr, guint flags)
174 {
175 // Inkscape-only object, not copied during an "plain SVG" dump:
176 if (flags & SP_OBJECT_WRITE_EXT) {
177 if (repr) {
178 // is this sane?
179 // Not. Causes coredumps.
180 // repr->mergeFrom(SP_OBJECT_REPR(object), "id");
181 } else {
182 repr = SP_OBJECT_REPR(object)->duplicate(NULL); // FIXME
183 }
184 }
186 if (((SPObjectClass *) feOffset_parent_class)->write) {
187 ((SPObjectClass *) feOffset_parent_class)->write(object, repr, flags);
188 }
190 return repr;
191 }
193 static void sp_feOffset_build_renderer(SPFilterPrimitive *primitive, NR::Filter *filter) {
194 g_assert(primitive != NULL);
195 g_assert(filter != NULL);
197 SPFeOffset *sp_offset = SP_FEOFFSET(primitive);
199 int primitive_n = filter->add_primitive(NR::NR_FILTER_OFFSET);
200 NR::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
201 NR::FilterOffset *nr_offset = dynamic_cast<NR::FilterOffset*>(nr_primitive);
202 g_assert(nr_offset != NULL);
204 sp_filter_primitive_renderer_common(primitive, nr_primitive);
206 nr_offset->set_dx(sp_offset->dx);
207 nr_offset->set_dy(sp_offset->dy);
208 }
211 /*
212 Local Variables:
213 mode:c++
214 c-file-style:"stroustrup"
215 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
216 indent-tabs-mode:nil
217 fill-column:99
218 End:
219 */
220 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :