1 /** \file
2 * SVG <feDisplacementMap> implementation.
3 *
4 */
5 /*
6 * Authors:
7 * hugo Rodrigues <haa.rodrigues@gmail.com>
8 * Abhishek Sharma
9 *
10 * Copyright (C) 2006 Hugo Rodrigues
11 *
12 * Released under GNU GPL, read the file 'COPYING' for more information
13 */
15 #ifdef HAVE_CONFIG_H
16 # include "config.h"
17 #endif
19 #include "attributes.h"
20 #include "svg/svg.h"
21 #include "displacementmap.h"
22 #include "xml/repr.h"
23 #include "display/nr-filter-displacement-map.h"
24 #include "helper-fns.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, Inkscape::Filters::Filter *filter);
36 static Inkscape::XML::Node *sp_feDisplacementMap_write(SPObject *object, Inkscape::XML::Document *doc, 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 = DISPLACEMENTMAP_CHANNEL_ALPHA;
82 feDisplacementMap->yChannelSelector = DISPLACEMENTMAP_CHANNEL_ALPHA;
83 feDisplacementMap->in2 = Inkscape::Filters::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 object->readAttr( "scale" );
100 object->readAttr( "in2" );
101 object->readAttr( "xChannelSelector" );
102 object->readAttr( "yChannelSelector" );
104 /* Unlike normal in, in2 is required attribute. Make sure, we can call
105 * it by some name. */
106 SPFeDisplacementMap *disp = SP_FEDISPLACEMENTMAP(object);
107 if (disp->in2 == Inkscape::Filters::NR_FILTER_SLOT_NOT_SET ||
108 disp->in2 == Inkscape::Filters::NR_FILTER_UNNAMED_SLOT)
109 {
110 SPFilter *parent = SP_FILTER(object->parent);
111 disp->in2 = sp_filter_primitive_name_previous_out(disp);
112 repr->setAttribute("in2", sp_filter_name_for_image(parent, disp->in2));
113 }
114 }
116 /**
117 * Drops any allocated memory.
118 */
119 static void
120 sp_feDisplacementMap_release(SPObject *object)
121 {
122 if (((SPObjectClass *) feDisplacementMap_parent_class)->release)
123 ((SPObjectClass *) feDisplacementMap_parent_class)->release(object);
124 }
126 static FilterDisplacementMapChannelSelector sp_feDisplacementMap_readChannelSelector(gchar const *value)
127 {
128 if (!value) return DISPLACEMENTMAP_CHANNEL_ALPHA;
129 switch (value[0]) {
130 case 'R':
131 return DISPLACEMENTMAP_CHANNEL_RED;
132 break;
133 case 'G':
134 return DISPLACEMENTMAP_CHANNEL_GREEN;
135 break;
136 case 'B':
137 return DISPLACEMENTMAP_CHANNEL_BLUE;
138 break;
139 case 'A':
140 return DISPLACEMENTMAP_CHANNEL_ALPHA;
141 break;
142 default:
143 // error
144 g_warning("Invalid attribute for Channel Selector. Valid modes are 'R', 'G', 'B' or 'A'");
145 break;
146 }
147 return DISPLACEMENTMAP_CHANNEL_ALPHA; //default is Alpha Channel
148 }
150 /**
151 * Sets a specific value in the SPFeDisplacementMap.
152 */
153 static void
154 sp_feDisplacementMap_set(SPObject *object, unsigned int key, gchar const *value)
155 {
156 SPFeDisplacementMap *feDisplacementMap = SP_FEDISPLACEMENTMAP(object);
157 (void)feDisplacementMap;
158 int input;
159 double read_num;
160 FilterDisplacementMapChannelSelector read_selector;
161 switch(key) {
162 /*DEAL WITH SETTING ATTRIBUTES HERE*/
163 case SP_ATTR_XCHANNELSELECTOR:
164 read_selector = sp_feDisplacementMap_readChannelSelector(value);
165 if (read_selector != feDisplacementMap->xChannelSelector){
166 feDisplacementMap->xChannelSelector = read_selector;
167 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
168 }
169 break;
170 case SP_ATTR_YCHANNELSELECTOR:
171 read_selector = sp_feDisplacementMap_readChannelSelector(value);
172 if (read_selector != feDisplacementMap->yChannelSelector){
173 feDisplacementMap->yChannelSelector = read_selector;
174 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
175 }
176 break;
177 case SP_ATTR_SCALE:
178 read_num = value ? helperfns_read_number(value) : 0;
179 if (read_num != feDisplacementMap->scale) {
180 feDisplacementMap->scale = read_num;
181 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
182 }
183 break;
184 case SP_ATTR_IN2:
185 input = sp_filter_primitive_read_in(feDisplacementMap, value);
186 if (input != feDisplacementMap->in2) {
187 feDisplacementMap->in2 = input;
188 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
189 }
190 break;
191 default:
192 if (((SPObjectClass *) feDisplacementMap_parent_class)->set)
193 ((SPObjectClass *) feDisplacementMap_parent_class)->set(object, key, value);
194 break;
195 }
197 }
199 /**
200 * Receives update notifications.
201 */
202 static void
203 sp_feDisplacementMap_update(SPObject *object, SPCtx *ctx, guint flags)
204 {
205 if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG |
206 SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
208 /* do something to trigger redisplay, updates? */
210 }
212 /* Unlike normal in, in2 is required attribute. Make sure, we can call
213 * it by some name. */
214 SPFeDisplacementMap *disp = SP_FEDISPLACEMENTMAP(object);
215 if (disp->in2 == Inkscape::Filters::NR_FILTER_SLOT_NOT_SET ||
216 disp->in2 == Inkscape::Filters::NR_FILTER_UNNAMED_SLOT)
217 {
218 SPFilter *parent = SP_FILTER(object->parent);
219 disp->in2 = sp_filter_primitive_name_previous_out(disp);
221 //XML Tree being used directly here while it shouldn't be.
222 object->getRepr()->setAttribute("in2", sp_filter_name_for_image(parent, disp->in2));
223 }
225 if (((SPObjectClass *) feDisplacementMap_parent_class)->update) {
226 ((SPObjectClass *) feDisplacementMap_parent_class)->update(object, ctx, flags);
227 }
228 }
230 static char const * get_channelselector_name(FilterDisplacementMapChannelSelector selector) {
231 switch(selector) {
232 case DISPLACEMENTMAP_CHANNEL_RED:
233 return "R";
234 case DISPLACEMENTMAP_CHANNEL_GREEN:
235 return "G";
236 case DISPLACEMENTMAP_CHANNEL_BLUE:
237 return "B";
238 case DISPLACEMENTMAP_CHANNEL_ALPHA:
239 return "A";
240 default:
241 return 0;
242 }
243 }
245 /**
246 * Writes its settings to an incoming repr object, if any.
247 */
248 static Inkscape::XML::Node *
249 sp_feDisplacementMap_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags)
250 {
251 SPFeDisplacementMap *disp = SP_FEDISPLACEMENTMAP(object);
252 SPFilter *parent = SP_FILTER(object->parent);
254 if (!repr) {
255 repr = doc->createElement("svg:feDisplacementMap");
256 }
258 gchar const *out_name = sp_filter_name_for_image(parent, disp->in2);
259 if (out_name) {
260 repr->setAttribute("in2", out_name);
261 } else {
262 SPObject *i = parent->children;
263 while (i && i->next != object) i = i->next;
264 SPFilterPrimitive *i_prim = SP_FILTER_PRIMITIVE(i);
265 out_name = sp_filter_name_for_image(parent, i_prim->image_out);
266 repr->setAttribute("in2", out_name);
267 if (!out_name) {
268 g_warning("Unable to set in2 for feDisplacementMap");
269 }
270 }
272 sp_repr_set_svg_double(repr, "scale", disp->scale);
273 repr->setAttribute("xChannelSelector",
274 get_channelselector_name(disp->xChannelSelector));
275 repr->setAttribute("yChannelSelector",
276 get_channelselector_name(disp->yChannelSelector));
278 if (((SPObjectClass *) feDisplacementMap_parent_class)->write) {
279 ((SPObjectClass *) feDisplacementMap_parent_class)->write(object, doc, repr, flags);
280 }
282 return repr;
283 }
285 static void sp_feDisplacementMap_build_renderer(SPFilterPrimitive *primitive, Inkscape::Filters::Filter *filter) {
286 g_assert(primitive != NULL);
287 g_assert(filter != NULL);
289 SPFeDisplacementMap *sp_displacement_map = SP_FEDISPLACEMENTMAP(primitive);
291 int primitive_n = filter->add_primitive(Inkscape::Filters::NR_FILTER_DISPLACEMENTMAP);
292 Inkscape::Filters::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
293 Inkscape::Filters::FilterDisplacementMap *nr_displacement_map = dynamic_cast<Inkscape::Filters::FilterDisplacementMap*>(nr_primitive);
294 g_assert(nr_displacement_map != NULL);
296 sp_filter_primitive_renderer_common(primitive, nr_primitive);
298 nr_displacement_map->set_input(1, sp_displacement_map->in2);
299 nr_displacement_map->set_scale(sp_displacement_map->scale);
300 nr_displacement_map->set_channel_selector(0, sp_displacement_map->xChannelSelector);
301 nr_displacement_map->set_channel_selector(1, sp_displacement_map->yChannelSelector);
302 }
305 /*
306 Local Variables:
307 mode:c++
308 c-file-style:"stroustrup"
309 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
310 indent-tabs-mode:nil
311 fill-column:99
312 End:
313 */
314 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :