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 static double
113 sp_feOffset_read_number(gchar const *value) {
114 if (!value) return 0;
115 char *end;
116 double ret = g_ascii_strtod(value, &end);
117 if (*end) {
118 g_warning("Unable to convert \"%s\" to number", value);
119 // We could leave this out, too. If strtod can't convert
120 // anything, it will return zero.
121 ret = 0;
122 }
123 return ret;
124 }
126 /**
127 * Sets a specific value in the SPFeOffset.
128 */
129 static void
130 sp_feOffset_set(SPObject *object, unsigned int key, gchar const *value)
131 {
132 SPFeOffset *feOffset = SP_FEOFFSET(object);
134 double read_num;
135 switch(key) {
136 case SP_ATTR_DX:
137 read_num = sp_feOffset_read_number(value);
138 if (read_num != feOffset->dx) {
139 feOffset->dx = read_num;
140 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
141 }
142 break;
143 case SP_ATTR_DY:
144 read_num = sp_feOffset_read_number(value);
145 if (read_num != feOffset->dy) {
146 feOffset->dy = read_num;
147 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
148 }
149 break;
151 /*DEAL WITH SETTING ATTRIBUTES HERE*/
152 default:
153 if (((SPObjectClass *) feOffset_parent_class)->set)
154 ((SPObjectClass *) feOffset_parent_class)->set(object, key, value);
155 break;
156 }
158 }
160 /**
161 * Receives update notifications.
162 */
163 static void
164 sp_feOffset_update(SPObject *object, SPCtx *ctx, guint flags)
165 {
166 if (flags & SP_OBJECT_MODIFIED_FLAG) {
167 sp_object_read_attr(object, "dx");
168 sp_object_read_attr(object, "dy");
169 }
171 if (((SPObjectClass *) feOffset_parent_class)->update) {
172 ((SPObjectClass *) feOffset_parent_class)->update(object, ctx, flags);
173 }
174 }
176 /**
177 * Writes its settings to an incoming repr object, if any.
178 */
179 static Inkscape::XML::Node *
180 sp_feOffset_write(SPObject *object, Inkscape::XML::Node *repr, guint flags)
181 {
182 // Inkscape-only object, not copied during an "plain SVG" dump:
183 if (flags & SP_OBJECT_WRITE_EXT) {
184 if (repr) {
185 // is this sane?
186 // Not. Causes coredumps.
187 // repr->mergeFrom(SP_OBJECT_REPR(object), "id");
188 } else {
189 repr = SP_OBJECT_REPR(object)->duplicate(NULL); // FIXME
190 }
191 }
193 if (((SPObjectClass *) feOffset_parent_class)->write) {
194 ((SPObjectClass *) feOffset_parent_class)->write(object, repr, flags);
195 }
197 return repr;
198 }
200 static void sp_feOffset_build_renderer(SPFilterPrimitive *primitive, NR::Filter *filter) {
201 g_assert(primitive != NULL);
202 g_assert(filter != NULL);
204 SPFeOffset *sp_offset = SP_FEOFFSET(primitive);
206 int primitive_n = filter->add_primitive(NR::NR_FILTER_OFFSET);
207 NR::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
208 NR::FilterOffset *nr_offset = dynamic_cast<NR::FilterOffset*>(nr_primitive);
209 g_assert(nr_offset != NULL);
211 sp_filter_primitive_renderer_common(primitive, nr_primitive);
213 nr_offset->set_dx(sp_offset->dx);
214 nr_offset->set_dy(sp_offset->dy);
215 }
218 /*
219 Local Variables:
220 mode:c++
221 c-file-style:"stroustrup"
222 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
223 indent-tabs-mode:nil
224 fill-column:99
225 End:
226 */
227 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :