1 #define __SP_FEDISPLACEMENTMAP_CPP__
3 /** \file
4 * SVG <feDisplacementMap> implementation.
5 *
6 */
7 /*
8 * Authors:
9 * hugo Rodrigues <haa.rodrigues@gmail.com>
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 "attributes.h"
21 #include "svg/svg.h"
22 #include "sp-fedisplacementmap.h"
23 #include "xml/repr.h"
24 #include "display/nr-filter-displacement-map.h"
25 #include "helper-fns.h"
27 /* FeDisplacementMap base class */
29 static void sp_feDisplacementMap_class_init(SPFeDisplacementMapClass *klass);
30 static void sp_feDisplacementMap_init(SPFeDisplacementMap *feDisplacementMap);
32 static void sp_feDisplacementMap_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
33 static void sp_feDisplacementMap_release(SPObject *object);
34 static void sp_feDisplacementMap_set(SPObject *object, unsigned int key, gchar const *value);
35 static void sp_feDisplacementMap_update(SPObject *object, SPCtx *ctx, guint flags);
36 static void sp_feDisplacementMap_build_renderer(SPFilterPrimitive *primitive, NR::Filter *filter);
37 static Inkscape::XML::Node *sp_feDisplacementMap_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);
39 static SPFilterPrimitiveClass *feDisplacementMap_parent_class;
41 GType
42 sp_feDisplacementMap_get_type()
43 {
44 static GType feDisplacementMap_type = 0;
46 if (!feDisplacementMap_type) {
47 GTypeInfo feDisplacementMap_info = {
48 sizeof(SPFeDisplacementMapClass),
49 NULL, NULL,
50 (GClassInitFunc) sp_feDisplacementMap_class_init,
51 NULL, NULL,
52 sizeof(SPFeDisplacementMap),
53 16,
54 (GInstanceInitFunc) sp_feDisplacementMap_init,
55 NULL, /* value_table */
56 };
57 feDisplacementMap_type = g_type_register_static(SP_TYPE_FILTER_PRIMITIVE, "SPFeDisplacementMap", &feDisplacementMap_info, (GTypeFlags)0);
58 }
59 return feDisplacementMap_type;
60 }
62 static void
63 sp_feDisplacementMap_class_init(SPFeDisplacementMapClass *klass)
64 {
65 SPObjectClass *sp_object_class = (SPObjectClass *)klass;
66 SPFilterPrimitiveClass *sp_primitive_class = (SPFilterPrimitiveClass *)klass;
68 feDisplacementMap_parent_class = (SPFilterPrimitiveClass*)g_type_class_peek_parent(klass);
70 sp_object_class->build = sp_feDisplacementMap_build;
71 sp_object_class->release = sp_feDisplacementMap_release;
72 sp_object_class->write = sp_feDisplacementMap_write;
73 sp_object_class->set = sp_feDisplacementMap_set;
74 sp_object_class->update = sp_feDisplacementMap_update;
75 sp_primitive_class->build_renderer = sp_feDisplacementMap_build_renderer;
76 }
78 static void
79 sp_feDisplacementMap_init(SPFeDisplacementMap *feDisplacementMap)
80 {
81 feDisplacementMap->scale=0;
82 feDisplacementMap->xChannelSelector = DISPLACEMENTMAP_CHANNEL_ALPHA;
83 feDisplacementMap->yChannelSelector = DISPLACEMENTMAP_CHANNEL_ALPHA;
84 feDisplacementMap->in2 = NR::NR_FILTER_SLOT_NOT_SET;
85 }
87 /**
88 * Reads the Inkscape::XML::Node, and initializes SPFeDisplacementMap 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_feDisplacementMap_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
94 {
95 if (((SPObjectClass *) feDisplacementMap_parent_class)->build) {
96 ((SPObjectClass *) feDisplacementMap_parent_class)->build(object, document, repr);
97 }
99 /*LOAD ATTRIBUTES FROM REPR HERE*/
100 sp_object_read_attr(object, "scale");
101 sp_object_read_attr(object, "in2");
102 sp_object_read_attr(object, "xChannelSelector");
103 sp_object_read_attr(object, "yChannelSelector");
104 }
106 /**
107 * Drops any allocated memory.
108 */
109 static void
110 sp_feDisplacementMap_release(SPObject *object)
111 {
112 if (((SPObjectClass *) feDisplacementMap_parent_class)->release)
113 ((SPObjectClass *) feDisplacementMap_parent_class)->release(object);
114 }
116 static FilterDisplacementMapChannelSelector sp_feDisplacementMap_readChannelSelector(gchar const *value)
117 {
118 if (!value) return DISPLACEMENTMAP_CHANNEL_ALPHA;
119 switch (value[0]) {
120 case 'R':
121 return DISPLACEMENTMAP_CHANNEL_RED;
122 break;
123 case 'G':
124 return DISPLACEMENTMAP_CHANNEL_GREEN;
125 break;
126 case 'B':
127 return DISPLACEMENTMAP_CHANNEL_BLUE;
128 break;
129 case 'A':
130 return DISPLACEMENTMAP_CHANNEL_ALPHA;
131 break;
132 default:
133 // error
134 g_warning("Invalid attribute for Channel Selector. Valid modes are 'R', 'G', 'B' or 'A'");
135 break;
136 }
137 return DISPLACEMENTMAP_CHANNEL_ALPHA; //default is Alpha Channel
138 }
140 /**
141 * Sets a specific value in the SPFeDisplacementMap.
142 */
143 static void
144 sp_feDisplacementMap_set(SPObject *object, unsigned int key, gchar const *value)
145 {
146 SPFeDisplacementMap *feDisplacementMap = SP_FEDISPLACEMENTMAP(object);
147 (void)feDisplacementMap;
148 int input;
149 double read_num;
150 FilterDisplacementMapChannelSelector read_selector;
151 switch(key) {
152 /*DEAL WITH SETTING ATTRIBUTES HERE*/
153 case SP_ATTR_XCHANNELSELECTOR:
154 read_selector = sp_feDisplacementMap_readChannelSelector(value);
155 if (read_selector != feDisplacementMap->xChannelSelector){
156 feDisplacementMap->xChannelSelector = read_selector;
157 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
158 }
159 break;
160 case SP_ATTR_YCHANNELSELECTOR:
161 read_selector = sp_feDisplacementMap_readChannelSelector(value);
162 if (read_selector != feDisplacementMap->yChannelSelector){
163 feDisplacementMap->yChannelSelector = read_selector;
164 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
165 }
166 break;
167 case SP_ATTR_SCALE:
168 read_num = helperfns_read_number(value);
169 if (read_num != feDisplacementMap->scale) {
170 feDisplacementMap->scale = read_num;
171 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
172 }
173 break;
174 case SP_ATTR_IN2:
175 input = sp_filter_primitive_read_in(feDisplacementMap, value);
176 if (input != feDisplacementMap->in2) {
177 feDisplacementMap->in2 = input;
178 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
179 }
180 break;
181 default:
182 if (((SPObjectClass *) feDisplacementMap_parent_class)->set)
183 ((SPObjectClass *) feDisplacementMap_parent_class)->set(object, key, value);
184 break;
185 }
187 }
189 /**
190 * Receives update notifications.
191 */
192 static void
193 sp_feDisplacementMap_update(SPObject *object, SPCtx *ctx, guint flags)
194 {
195 if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG |
196 SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
198 /* do something to trigger redisplay, updates? */
200 }
202 if (((SPObjectClass *) feDisplacementMap_parent_class)->update) {
203 ((SPObjectClass *) feDisplacementMap_parent_class)->update(object, ctx, flags);
204 }
205 }
207 /**
208 * Writes its settings to an incoming repr object, if any.
209 */
210 static Inkscape::XML::Node *
211 sp_feDisplacementMap_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags)
212 {
213 // Inkscape-only object, not copied during an "plain SVG" dump:
214 if (flags & SP_OBJECT_WRITE_EXT) {
215 if (repr) {
216 // is this sane?
217 //repr->mergeFrom(SP_OBJECT_REPR(object), "id");
218 } else {
219 repr = SP_OBJECT_REPR(object)->duplicate(doc);
220 }
221 }
223 if (((SPObjectClass *) feDisplacementMap_parent_class)->write) {
224 ((SPObjectClass *) feDisplacementMap_parent_class)->write(object, doc, repr, flags);
225 }
227 return repr;
228 }
230 static void sp_feDisplacementMap_build_renderer(SPFilterPrimitive *primitive, NR::Filter *filter) {
231 g_assert(primitive != NULL);
232 g_assert(filter != NULL);
234 SPFeDisplacementMap *sp_displacement_map = SP_FEDISPLACEMENTMAP(primitive);
236 int primitive_n = filter->add_primitive(NR::NR_FILTER_DISPLACEMENTMAP);
237 NR::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
238 NR::FilterDisplacementMap *nr_displacement_map = dynamic_cast<NR::FilterDisplacementMap*>(nr_primitive);
239 g_assert(nr_displacement_map != NULL);
241 sp_filter_primitive_renderer_common(primitive, nr_primitive);
243 nr_displacement_map->set_input(1, sp_displacement_map->in2);
244 nr_displacement_map->set_scale(sp_displacement_map->scale);
245 nr_displacement_map->set_channel_selector(0, sp_displacement_map->xChannelSelector);
246 nr_displacement_map->set_channel_selector(1, sp_displacement_map->yChannelSelector);
247 }
250 /*
251 Local Variables:
252 mode:c++
253 c-file-style:"stroustrup"
254 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
255 indent-tabs-mode:nil
256 fill-column:99
257 End:
258 */
259 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :