1 /** \file
2 * SVG <feMorphology> implementation.
3 *
4 */
5 /*
6 * Authors:
7 * Felipe Sanches <juca@members.fsf.org>
8 * Hugo Rodrigues <haa.rodrigues@gmail.com>
9 * Abhishek Sharma
10 *
11 * Copyright (C) 2006 Hugo Rodrigues
12 *
13 * Released under GNU GPL, read the file 'COPYING' for more information
14 */
16 #ifdef HAVE_CONFIG_H
17 # include "config.h"
18 #endif
20 #include <string.h>
22 #include "attributes.h"
23 #include "svg/svg.h"
24 #include "morphology.h"
25 #include "xml/repr.h"
26 #include "display/nr-filter-morphology.h"
28 /* FeMorphology base class */
30 static void sp_feMorphology_class_init(SPFeMorphologyClass *klass);
31 static void sp_feMorphology_init(SPFeMorphology *feMorphology);
33 static void sp_feMorphology_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
34 static void sp_feMorphology_release(SPObject *object);
35 static void sp_feMorphology_set(SPObject *object, unsigned int key, gchar const *value);
36 static void sp_feMorphology_update(SPObject *object, SPCtx *ctx, guint flags);
37 static Inkscape::XML::Node *sp_feMorphology_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);
38 static void sp_feMorphology_build_renderer(SPFilterPrimitive *primitive, Inkscape::Filters::Filter *filter);
40 static SPFilterPrimitiveClass *feMorphology_parent_class;
42 GType
43 sp_feMorphology_get_type()
44 {
45 static GType feMorphology_type = 0;
47 if (!feMorphology_type) {
48 GTypeInfo feMorphology_info = {
49 sizeof(SPFeMorphologyClass),
50 NULL, NULL,
51 (GClassInitFunc) sp_feMorphology_class_init,
52 NULL, NULL,
53 sizeof(SPFeMorphology),
54 16,
55 (GInstanceInitFunc) sp_feMorphology_init,
56 NULL, /* value_table */
57 };
58 feMorphology_type = g_type_register_static(SP_TYPE_FILTER_PRIMITIVE, "SPFeMorphology", &feMorphology_info, (GTypeFlags)0);
59 }
60 return feMorphology_type;
61 }
63 static void
64 sp_feMorphology_class_init(SPFeMorphologyClass *klass)
65 {
66 SPObjectClass *sp_object_class = (SPObjectClass *)klass;
67 SPFilterPrimitiveClass *sp_primitive_class = (SPFilterPrimitiveClass *)klass;
69 feMorphology_parent_class = (SPFilterPrimitiveClass*)g_type_class_peek_parent(klass);
71 sp_object_class->build = sp_feMorphology_build;
72 sp_object_class->release = sp_feMorphology_release;
73 sp_object_class->write = sp_feMorphology_write;
74 sp_object_class->set = sp_feMorphology_set;
75 sp_object_class->update = sp_feMorphology_update;
76 sp_primitive_class->build_renderer = sp_feMorphology_build_renderer;
77 }
79 static void
80 sp_feMorphology_init(SPFeMorphology *feMorphology)
81 {
82 //Setting default values:
83 feMorphology->radius.set("0");
84 }
86 /**
87 * Reads the Inkscape::XML::Node, and initializes SPFeMorphology 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_feMorphology_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
93 {
94 if (((SPObjectClass *) feMorphology_parent_class)->build) {
95 ((SPObjectClass *) feMorphology_parent_class)->build(object, document, repr);
96 }
98 /*LOAD ATTRIBUTES FROM REPR HERE*/
99 object->readAttr( "operator" );
100 object->readAttr( "radius" );
101 }
103 /**
104 * Drops any allocated memory.
105 */
106 static void
107 sp_feMorphology_release(SPObject *object)
108 {
109 if (((SPObjectClass *) feMorphology_parent_class)->release)
110 ((SPObjectClass *) feMorphology_parent_class)->release(object);
111 }
113 static Inkscape::Filters::FilterMorphologyOperator sp_feMorphology_read_operator(gchar const *value){
114 if (!value) return Inkscape::Filters::MORPHOLOGY_OPERATOR_ERODE; //erode is default
115 switch(value[0]){
116 case 'e':
117 if (strncmp(value, "erode", 5) == 0) return Inkscape::Filters::MORPHOLOGY_OPERATOR_ERODE;
118 break;
119 case 'd':
120 if (strncmp(value, "dilate", 6) == 0) return Inkscape::Filters::MORPHOLOGY_OPERATOR_DILATE;
121 break;
122 }
123 return Inkscape::Filters::MORPHOLOGY_OPERATOR_ERODE; //erode is default
124 }
126 /**
127 * Sets a specific value in the SPFeMorphology.
128 */
129 static void
130 sp_feMorphology_set(SPObject *object, unsigned int key, gchar const *value)
131 {
132 SPFeMorphology *feMorphology = SP_FEMORPHOLOGY(object);
133 (void)feMorphology;
135 Inkscape::Filters::FilterMorphologyOperator read_operator;
136 switch(key) {
137 /*DEAL WITH SETTING ATTRIBUTES HERE*/
138 case SP_ATTR_OPERATOR:
139 read_operator = sp_feMorphology_read_operator(value);
140 if (read_operator != feMorphology->Operator){
141 feMorphology->Operator = read_operator;
142 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
143 }
144 break;
145 case SP_ATTR_RADIUS:
146 feMorphology->radius.set(value);
147 //From SVG spec: If <y-radius> is not provided, it defaults to <x-radius>.
148 if (feMorphology->radius.optNumIsSet() == false)
149 feMorphology->radius.setOptNumber(feMorphology->radius.getNumber());
150 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
151 break;
152 default:
153 if (((SPObjectClass *) feMorphology_parent_class)->set)
154 ((SPObjectClass *) feMorphology_parent_class)->set(object, key, value);
155 break;
156 }
158 }
160 /**
161 * Receives update notifications.
162 */
163 static void
164 sp_feMorphology_update(SPObject *object, SPCtx *ctx, guint flags)
165 {
166 if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG |
167 SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
169 /* do something to trigger redisplay, updates? */
171 }
173 if (((SPObjectClass *) feMorphology_parent_class)->update) {
174 ((SPObjectClass *) feMorphology_parent_class)->update(object, ctx, flags);
175 }
176 }
178 /**
179 * Writes its settings to an incoming repr object, if any.
180 */
181 static Inkscape::XML::Node *
182 sp_feMorphology_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags)
183 {
184 /* TODO: Don't just clone, but create a new repr node and write all
185 * relevant values into it */
186 if (!repr) {
187 repr = SP_OBJECT_REPR(object)->duplicate(doc);
188 }
190 if (((SPObjectClass *) feMorphology_parent_class)->write) {
191 ((SPObjectClass *) feMorphology_parent_class)->write(object, doc, repr, flags);
192 }
194 return repr;
195 }
197 static void sp_feMorphology_build_renderer(SPFilterPrimitive *primitive, Inkscape::Filters::Filter *filter) {
198 g_assert(primitive != NULL);
199 g_assert(filter != NULL);
201 SPFeMorphology *sp_morphology = SP_FEMORPHOLOGY(primitive);
203 int primitive_n = filter->add_primitive(Inkscape::Filters::NR_FILTER_MORPHOLOGY);
204 Inkscape::Filters::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
205 Inkscape::Filters::FilterMorphology *nr_morphology = dynamic_cast<Inkscape::Filters::FilterMorphology*>(nr_primitive);
206 g_assert(nr_morphology != NULL);
208 sp_filter_primitive_renderer_common(primitive, nr_primitive);
210 nr_morphology->set_operator(sp_morphology->Operator);
211 nr_morphology->set_xradius( sp_morphology->radius.getNumber() );
212 nr_morphology->set_yradius( sp_morphology->radius.getOptNumber() );
213 }
215 /*
216 Local Variables:
217 mode:c++
218 c-file-style:"stroustrup"
219 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
220 indent-tabs-mode:nil
221 fill-column:99
222 End:
223 */
224 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :