1 /** \file
2 * SVG <feOffset> implementation.
3 *
4 */
5 /*
6 * Authors:
7 * hugo Rodrigues <haa.rodrigues@gmail.com>
8 * Niko Kiirala <niko@kiirala.com>
9 * Abhishek Sharma
10 *
11 * Copyright (C) 2006,2007 authors
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 "attributes.h"
21 #include "svg/svg.h"
22 #include "offset.h"
23 #include "helper-fns.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::Document *doc, Inkscape::XML::Node *repr, guint flags);
37 static void sp_feOffset_build_renderer(SPFilterPrimitive *primitive, Inkscape::Filters::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 object->readAttr( "dx" );
99 object->readAttr( "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 /**
113 * Sets a specific value in the SPFeOffset.
114 */
115 static void
116 sp_feOffset_set(SPObject *object, unsigned int key, gchar const *value)
117 {
118 SPFeOffset *feOffset = SP_FEOFFSET(object);
120 double read_num;
121 switch(key) {
122 case SP_ATTR_DX:
123 read_num = value ? helperfns_read_number(value) : 0;
124 if (read_num != feOffset->dx) {
125 feOffset->dx = read_num;
126 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
127 }
128 break;
129 case SP_ATTR_DY:
130 read_num = value ? helperfns_read_number(value) : 0;
131 if (read_num != feOffset->dy) {
132 feOffset->dy = read_num;
133 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
134 }
135 break;
137 /*DEAL WITH SETTING ATTRIBUTES HERE*/
138 default:
139 if (((SPObjectClass *) feOffset_parent_class)->set)
140 ((SPObjectClass *) feOffset_parent_class)->set(object, key, value);
141 break;
142 }
144 }
146 /**
147 * Receives update notifications.
148 */
149 static void
150 sp_feOffset_update(SPObject *object, SPCtx *ctx, guint flags)
151 {
152 if (flags & SP_OBJECT_MODIFIED_FLAG) {
153 object->readAttr( "dx" );
154 object->readAttr( "dy" );
155 }
157 if (((SPObjectClass *) feOffset_parent_class)->update) {
158 ((SPObjectClass *) feOffset_parent_class)->update(object, ctx, flags);
159 }
160 }
162 /**
163 * Writes its settings to an incoming repr object, if any.
164 */
165 static Inkscape::XML::Node *
166 sp_feOffset_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags)
167 {
168 /* TODO: Don't just clone, but create a new repr node and write all
169 * relevant values into it */
170 if (!repr) {
171 repr = SP_OBJECT_REPR(object)->duplicate(doc);
172 }
174 if (((SPObjectClass *) feOffset_parent_class)->write) {
175 ((SPObjectClass *) feOffset_parent_class)->write(object, doc, repr, flags);
176 }
178 return repr;
179 }
181 static void sp_feOffset_build_renderer(SPFilterPrimitive *primitive, Inkscape::Filters::Filter *filter) {
182 g_assert(primitive != NULL);
183 g_assert(filter != NULL);
185 SPFeOffset *sp_offset = SP_FEOFFSET(primitive);
187 int primitive_n = filter->add_primitive(Inkscape::Filters::NR_FILTER_OFFSET);
188 Inkscape::Filters::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
189 Inkscape::Filters::FilterOffset *nr_offset = dynamic_cast<Inkscape::Filters::FilterOffset*>(nr_primitive);
190 g_assert(nr_offset != NULL);
192 sp_filter_primitive_renderer_common(primitive, nr_primitive);
194 nr_offset->set_dx(sp_offset->dx);
195 nr_offset->set_dy(sp_offset->dy);
196 }
199 /*
200 Local Variables:
201 mode:c++
202 c-file-style:"stroustrup"
203 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
204 indent-tabs-mode:nil
205 fill-column:99
206 End:
207 */
208 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :