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"
26 /* FeDisplacementMap base class */
28 static void sp_feDisplacementMap_class_init(SPFeDisplacementMapClass *klass);
29 static void sp_feDisplacementMap_init(SPFeDisplacementMap *feDisplacementMap);
31 static void sp_feDisplacementMap_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
32 static void sp_feDisplacementMap_release(SPObject *object);
33 static void sp_feDisplacementMap_set(SPObject *object, unsigned int key, gchar const *value);
34 static void sp_feDisplacementMap_update(SPObject *object, SPCtx *ctx, guint flags);
35 static void sp_feDisplacementMap_build_renderer(SPFilterPrimitive *primitive, NR::Filter *filter);
36 static Inkscape::XML::Node *sp_feDisplacementMap_write(SPObject *object, Inkscape::XML::Node *repr, guint flags);
38 static SPFilterPrimitiveClass *feDisplacementMap_parent_class;
40 GType
41 sp_feDisplacementMap_get_type()
42 {
43 static GType feDisplacementMap_type = 0;
45 if (!feDisplacementMap_type) {
46 GTypeInfo feDisplacementMap_info = {
47 sizeof(SPFeDisplacementMapClass),
48 NULL, NULL,
49 (GClassInitFunc) sp_feDisplacementMap_class_init,
50 NULL, NULL,
51 sizeof(SPFeDisplacementMap),
52 16,
53 (GInstanceInitFunc) sp_feDisplacementMap_init,
54 NULL, /* value_table */
55 };
56 feDisplacementMap_type = g_type_register_static(SP_TYPE_FILTER_PRIMITIVE, "SPFeDisplacementMap", &feDisplacementMap_info, (GTypeFlags)0);
57 }
58 return feDisplacementMap_type;
59 }
61 static void
62 sp_feDisplacementMap_class_init(SPFeDisplacementMapClass *klass)
63 {
64 SPObjectClass *sp_object_class = (SPObjectClass *)klass;
65 SPFilterPrimitiveClass *sp_primitive_class = (SPFilterPrimitiveClass *)klass;
67 feDisplacementMap_parent_class = (SPFilterPrimitiveClass*)g_type_class_peek_parent(klass);
69 sp_object_class->build = sp_feDisplacementMap_build;
70 sp_object_class->release = sp_feDisplacementMap_release;
71 sp_object_class->write = sp_feDisplacementMap_write;
72 sp_object_class->set = sp_feDisplacementMap_set;
73 sp_object_class->update = sp_feDisplacementMap_update;
74 sp_primitive_class->build_renderer = sp_feDisplacementMap_build_renderer;
75 }
77 static void
78 sp_feDisplacementMap_init(SPFeDisplacementMap *feDisplacementMap)
79 {
80 feDisplacementMap->scale=0;
81 feDisplacementMap->xChannelSelector=3;
82 feDisplacementMap->yChannelSelector=3;
83 feDisplacementMap->in2 = NR::NR_FILTER_SLOT_NOT_SET;
84 }
86 /**
87 * Reads the Inkscape::XML::Node, and initializes SPFeDisplacementMap 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_feDisplacementMap_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
93 {
94 if (((SPObjectClass *) feDisplacementMap_parent_class)->build) {
95 ((SPObjectClass *) feDisplacementMap_parent_class)->build(object, document, repr);
96 }
98 /*LOAD ATTRIBUTES FROM REPR HERE*/
99 sp_object_read_attr(object, "scale");
100 sp_object_read_attr(object, "in2");
101 sp_object_read_attr(object, "xChannelSelector");
102 sp_object_read_attr(object, "yChannelSelector");
103 }
105 /**
106 * Drops any allocated memory.
107 */
108 static void
109 sp_feDisplacementMap_release(SPObject *object)
110 {
111 if (((SPObjectClass *) feDisplacementMap_parent_class)->release)
112 ((SPObjectClass *) feDisplacementMap_parent_class)->release(object);
113 }
115 static int sp_feDisplacementMap_readChannelSelector(gchar const *value)
116 {
117 if (!value) return 3;
118 switch (value[0]) {
119 case 'R':
120 return 0;
121 break;
122 case 'G':
123 return 1;
124 break;
125 case 'B':
126 return 2;
127 break;
128 case 'A':
129 return 3;
130 break;
131 default:
132 // error
133 g_warning("Invalid attribute for Channel Selector. Valid modes are 'R', 'G', 'B' or 'A'");
134 break;
135 }
136 return 3; //default is Alpha Channel
137 }
139 static double
140 sp_feDisplacementMap_read_number(gchar const *value) {
141 if (!value) return 0;
142 char *end;
143 double ret = g_ascii_strtod(value, &end);
144 if (*end) {
145 g_warning("Unable to convert \"%s\" to number", value);
146 // We could leave this out, too. If strtod can't convert
147 // anything, it will return zero.
148 ret = 0;
149 }
150 return ret;
151 }
153 /**
154 * Sets a specific value in the SPFeDisplacementMap.
155 */
156 static void
157 sp_feDisplacementMap_set(SPObject *object, unsigned int key, gchar const *value)
158 {
159 SPFeDisplacementMap *feDisplacementMap = SP_FEDISPLACEMENTMAP(object);
160 (void)feDisplacementMap;
161 int input;
162 double read_num;
163 int read_selector;
164 switch(key) {
165 /*DEAL WITH SETTING ATTRIBUTES HERE*/
166 case SP_ATTR_XCHANNELSELECTOR:
167 read_selector = sp_feDisplacementMap_readChannelSelector(value);
168 if (read_selector != feDisplacementMap->xChannelSelector){
169 feDisplacementMap->xChannelSelector = read_selector;
170 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
171 }
172 break;
173 case SP_ATTR_YCHANNELSELECTOR:
174 read_selector = sp_feDisplacementMap_readChannelSelector(value);
175 if (read_selector != feDisplacementMap->yChannelSelector){
176 feDisplacementMap->yChannelSelector = read_selector;
177 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
178 }
179 break;
180 case SP_ATTR_SCALE:
181 read_num = sp_feDisplacementMap_read_number(value);
182 if (read_num != feDisplacementMap->scale) {
183 feDisplacementMap->scale = read_num;
184 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
185 }
186 break;
187 case SP_ATTR_IN2:
188 input = sp_filter_primitive_read_in(feDisplacementMap, value);
189 if (input != feDisplacementMap->in2) {
190 feDisplacementMap->in2 = input;
191 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
192 }
193 break;
194 default:
195 if (((SPObjectClass *) feDisplacementMap_parent_class)->set)
196 ((SPObjectClass *) feDisplacementMap_parent_class)->set(object, key, value);
197 break;
198 }
200 }
202 /**
203 * Receives update notifications.
204 */
205 static void
206 sp_feDisplacementMap_update(SPObject *object, SPCtx *ctx, guint flags)
207 {
208 if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG |
209 SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
211 /* do something to trigger redisplay, updates? */
213 }
215 if (((SPObjectClass *) feDisplacementMap_parent_class)->update) {
216 ((SPObjectClass *) feDisplacementMap_parent_class)->update(object, ctx, flags);
217 }
218 }
220 /**
221 * Writes its settings to an incoming repr object, if any.
222 */
223 static Inkscape::XML::Node *
224 sp_feDisplacementMap_write(SPObject *object, Inkscape::XML::Node *repr, guint flags)
225 {
226 // Inkscape-only object, not copied during an "plain SVG" dump:
227 if (flags & SP_OBJECT_WRITE_EXT) {
228 if (repr) {
229 // is this sane?
230 repr->mergeFrom(SP_OBJECT_REPR(object), "id");
231 } else {
232 repr = SP_OBJECT_REPR(object)->duplicate(NULL); // FIXME
233 }
234 }
236 if (((SPObjectClass *) feDisplacementMap_parent_class)->write) {
237 ((SPObjectClass *) feDisplacementMap_parent_class)->write(object, repr, flags);
238 }
240 return repr;
241 }
243 static void sp_feDisplacementMap_build_renderer(SPFilterPrimitive *primitive, NR::Filter *filter) {
244 g_assert(primitive != NULL);
245 g_assert(filter != NULL);
247 SPFeDisplacementMap *sp_displacement_map = SP_FEDISPLACEMENTMAP(primitive);
249 int primitive_n = filter->add_primitive(NR::NR_FILTER_DISPLACEMENTMAP);
250 NR::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
251 NR::FilterDisplacementMap *nr_displacement_map = dynamic_cast<NR::FilterDisplacementMap*>(nr_primitive);
252 g_assert(nr_displacement_map != NULL);
254 sp_filter_primitive_renderer_common(primitive, nr_primitive);
256 nr_displacement_map->set_input(1, sp_displacement_map->in2);
257 nr_displacement_map->set_scale(sp_displacement_map->scale);
258 nr_displacement_map->set_channel_selector(0, sp_displacement_map->xChannelSelector);
259 nr_displacement_map->set_channel_selector(1, sp_displacement_map->yChannelSelector);
260 }
263 /*
264 Local Variables:
265 mode:c++
266 c-file-style:"stroustrup"
267 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
268 indent-tabs-mode:nil
269 fill-column:99
270 End:
271 */
272 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :