1 /** \file
2 * SVG <feDiffuseLighting> implementation.
3 *
4 */
5 /*
6 * Authors:
7 * hugo Rodrigues <haa.rodrigues@gmail.com>
8 * Jean-Rene Reinhard <jr@komite.net>
9 * Abhishek Sharma
10 *
11 * Copyright (C) 2006 Hugo Rodrigues
12 * 2007 authors
13 *
14 * Released under GNU GPL, read the file 'COPYING' for more information
15 */
17 #ifdef HAVE_CONFIG_H
18 # include "config.h"
19 #endif
21 #include "attributes.h"
22 #include "svg/svg.h"
23 #include "sp-object.h"
24 #include "svg/svg-color.h"
25 #include "diffuselighting.h"
26 #include "xml/repr.h"
27 #include "display/nr-filter-diffuselighting.h"
29 /* FeDiffuseLighting base class */
31 static void sp_feDiffuseLighting_class_init(SPFeDiffuseLightingClass *klass);
32 static void sp_feDiffuseLighting_init(SPFeDiffuseLighting *feDiffuseLighting);
34 static void sp_feDiffuseLighting_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
35 static void sp_feDiffuseLighting_release(SPObject *object);
36 static void sp_feDiffuseLighting_set(SPObject *object, unsigned int key, gchar const *value);
37 static void sp_feDiffuseLighting_update(SPObject *object, SPCtx *ctx, guint flags);
38 //we assume that svg:feDiffuseLighting can have any number of children
39 //only the first one is considered as the light source of the filter
40 //TODO is that right?
41 //if not modify child_added and remove_child to raise errors
42 static void sp_feDiffuseLighting_child_added(SPObject *object,
43 Inkscape::XML::Node *child,
44 Inkscape::XML::Node *ref);
45 static void sp_feDiffuseLighting_remove_child(SPObject *object, Inkscape::XML::Node *child);
46 static void sp_feDiffuseLighting_order_changed(SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *old_ref, Inkscape::XML::Node *new_ref);
47 static Inkscape::XML::Node *sp_feDiffuseLighting_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);
48 static void sp_feDiffuseLighting_build_renderer(SPFilterPrimitive *primitive, Inkscape::Filters::Filter *filter);
49 static void sp_feDiffuseLighting_children_modified(SPFeDiffuseLighting *sp_diffuselighting);
51 static SPFilterPrimitiveClass *feDiffuseLighting_parent_class;
53 GType
54 sp_feDiffuseLighting_get_type()
55 {
56 static GType feDiffuseLighting_type = 0;
58 if (!feDiffuseLighting_type) {
59 GTypeInfo feDiffuseLighting_info = {
60 sizeof(SPFeDiffuseLightingClass),
61 NULL, NULL,
62 (GClassInitFunc) sp_feDiffuseLighting_class_init,
63 NULL, NULL,
64 sizeof(SPFeDiffuseLighting),
65 16,
66 (GInstanceInitFunc) sp_feDiffuseLighting_init,
67 NULL, /* value_table */
68 };
69 feDiffuseLighting_type = g_type_register_static(SP_TYPE_FILTER_PRIMITIVE, "SPFeDiffuseLighting", &feDiffuseLighting_info, (GTypeFlags)0);
70 }
71 return feDiffuseLighting_type;
72 }
74 static void
75 sp_feDiffuseLighting_class_init(SPFeDiffuseLightingClass *klass)
76 {
77 SPObjectClass *sp_object_class = (SPObjectClass *)klass;
78 SPFilterPrimitiveClass *sp_primitive_class = (SPFilterPrimitiveClass *)klass;
79 feDiffuseLighting_parent_class = (SPFilterPrimitiveClass*)g_type_class_peek_parent(klass);
81 sp_object_class->build = sp_feDiffuseLighting_build;
82 sp_object_class->release = sp_feDiffuseLighting_release;
83 sp_object_class->write = sp_feDiffuseLighting_write;
84 sp_object_class->set = sp_feDiffuseLighting_set;
85 sp_object_class->update = sp_feDiffuseLighting_update;
86 sp_object_class->child_added = sp_feDiffuseLighting_child_added;
87 sp_object_class->remove_child = sp_feDiffuseLighting_remove_child;
88 sp_object_class->order_changed = sp_feDiffuseLighting_order_changed;
90 sp_primitive_class->build_renderer = sp_feDiffuseLighting_build_renderer;
91 }
93 static void
94 sp_feDiffuseLighting_init(SPFeDiffuseLighting *feDiffuseLighting)
95 {
96 feDiffuseLighting->surfaceScale = 1;
97 feDiffuseLighting->diffuseConstant = 1;
98 feDiffuseLighting->lighting_color = 0xffffffff;
99 //TODO kernelUnit
100 feDiffuseLighting->renderer = NULL;
102 feDiffuseLighting->surfaceScale_set = FALSE;
103 feDiffuseLighting->diffuseConstant_set = FALSE;
104 feDiffuseLighting->lighting_color_set = FALSE;
105 }
107 /**
108 * Reads the Inkscape::XML::Node, and initializes SPFeDiffuseLighting variables. For this to get called,
109 * our name must be associated with a repr via "sp_object_type_register". Best done through
110 * sp-object-repr.cpp's repr_name_entries array.
111 */
112 static void
113 sp_feDiffuseLighting_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
114 {
115 if (((SPObjectClass *) feDiffuseLighting_parent_class)->build) {
116 ((SPObjectClass *) feDiffuseLighting_parent_class)->build(object, document, repr);
117 }
119 /*LOAD ATTRIBUTES FROM REPR HERE*/
120 object->readAttr( "surfaceScale" );
121 object->readAttr( "diffuseConstant" );
122 object->readAttr( "kernelUnitLength" );
123 object->readAttr( "lighting-color" );
125 }
127 /**
128 * Drops any allocated memory.
129 */
130 static void
131 sp_feDiffuseLighting_release(SPObject *object)
132 {
133 if (((SPObjectClass *) feDiffuseLighting_parent_class)->release)
134 ((SPObjectClass *) feDiffuseLighting_parent_class)->release(object);
135 }
137 /**
138 * Sets a specific value in the SPFeDiffuseLighting.
139 */
140 static void
141 sp_feDiffuseLighting_set(SPObject *object, unsigned int key, gchar const *value)
142 {
143 SPFeDiffuseLighting *feDiffuseLighting = SP_FEDIFFUSELIGHTING(object);
144 gchar const *cend_ptr = NULL;
145 gchar *end_ptr = NULL;
147 switch(key) {
148 /*DEAL WITH SETTING ATTRIBUTES HERE*/
149 //TODO test forbidden values
150 case SP_ATTR_SURFACESCALE:
151 end_ptr = NULL;
152 if (value) {
153 feDiffuseLighting->surfaceScale = g_ascii_strtod(value, &end_ptr);
154 if (end_ptr) {
155 feDiffuseLighting->surfaceScale_set = TRUE;
156 }
157 }
158 if (!value || !end_ptr) {
159 feDiffuseLighting->surfaceScale = 1;
160 feDiffuseLighting->surfaceScale_set = FALSE;
161 }
162 if (feDiffuseLighting->renderer) {
163 feDiffuseLighting->renderer->surfaceScale = feDiffuseLighting->surfaceScale;
164 }
165 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
166 break;
167 case SP_ATTR_DIFFUSECONSTANT:
168 end_ptr = NULL;
169 if (value) {
170 feDiffuseLighting->diffuseConstant = g_ascii_strtod(value, &end_ptr);
171 if (end_ptr && feDiffuseLighting->diffuseConstant >= 0) {
172 feDiffuseLighting->diffuseConstant_set = TRUE;
173 } else {
174 end_ptr = NULL;
175 g_warning("feDiffuseLighting: diffuseConstant should be a positive number ... defaulting to 1");
176 }
177 }
178 if (!value || !end_ptr) {
179 feDiffuseLighting->diffuseConstant = 1;
180 feDiffuseLighting->diffuseConstant_set = FALSE;
181 }
182 if (feDiffuseLighting->renderer) {
183 feDiffuseLighting->renderer->diffuseConstant = feDiffuseLighting->diffuseConstant;
184 }
185 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
186 break;
187 case SP_ATTR_KERNELUNITLENGTH:
188 //TODO kernelUnit
189 //feDiffuseLighting->kernelUnitLength.set(value);
190 /*TODOif (feDiffuseLighting->renderer) {
191 feDiffuseLighting->renderer->surfaceScale = feDiffuseLighting->renderer;
192 }
193 */
194 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
195 break;
196 case SP_PROP_LIGHTING_COLOR:
197 cend_ptr = NULL;
198 feDiffuseLighting->lighting_color = sp_svg_read_color(value, &cend_ptr, 0xffffffff);
199 //if a value was read
200 if (cend_ptr) {
201 feDiffuseLighting->lighting_color_set = TRUE;
202 } else {
203 //lighting_color already contains the default value
204 feDiffuseLighting->lighting_color_set = FALSE;
205 }
206 if (feDiffuseLighting->renderer) {
207 feDiffuseLighting->renderer->lighting_color = feDiffuseLighting->lighting_color;
208 }
209 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
210 break;
211 default:
212 if (((SPObjectClass *) feDiffuseLighting_parent_class)->set)
213 ((SPObjectClass *) feDiffuseLighting_parent_class)->set(object, key, value);
214 break;
215 }
217 }
219 /**
220 * Receives update notifications.
221 */
222 static void
223 sp_feDiffuseLighting_update(SPObject *object, SPCtx *ctx, guint flags)
224 {
225 if (flags & (SP_OBJECT_MODIFIED_FLAG)) {
226 object->readAttr( "surfaceScale" );
227 object->readAttr( "diffuseConstant" );
228 object->readAttr( "kernelUnit" );
229 object->readAttr( "lighting-color" );
230 }
232 if (((SPObjectClass *) feDiffuseLighting_parent_class)->update) {
233 ((SPObjectClass *) feDiffuseLighting_parent_class)->update(object, ctx, flags);
234 }
235 }
237 /**
238 * Writes its settings to an incoming repr object, if any.
239 */
240 static Inkscape::XML::Node *
241 sp_feDiffuseLighting_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags)
242 {
243 SPFeDiffuseLighting *fediffuselighting = SP_FEDIFFUSELIGHTING(object);
245 /* TODO: Don't just clone, but create a new repr node and write all
246 * relevant values _and children_ into it */
247 if (!repr) {
248 repr = SP_OBJECT_REPR(object)->duplicate(doc);
249 //repr = doc->createElement("svg:feDiffuseLighting");
250 }
252 if (fediffuselighting->surfaceScale_set)
253 sp_repr_set_css_double(repr, "surfaceScale", fediffuselighting->surfaceScale);
254 else
255 repr->setAttribute("surfaceScale", NULL);
256 if (fediffuselighting->diffuseConstant_set)
257 sp_repr_set_css_double(repr, "diffuseConstant", fediffuselighting->diffuseConstant);
258 else
259 repr->setAttribute("diffuseConstant", NULL);
260 /*TODO kernelUnits */
261 if (fediffuselighting->lighting_color_set) {
262 gchar c[64];
263 sp_svg_write_color(c, sizeof(c), fediffuselighting->lighting_color);
264 repr->setAttribute("lighting-color", c);
265 } else
266 repr->setAttribute("lighting-color", NULL);
268 if (((SPObjectClass *) feDiffuseLighting_parent_class)->write) {
269 ((SPObjectClass *) feDiffuseLighting_parent_class)->write(object, doc, repr, flags);
270 }
272 return repr;
273 }
275 /**
276 * Callback for child_added event.
277 */
278 static void
279 sp_feDiffuseLighting_child_added(SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref)
280 {
281 SPFeDiffuseLighting *f = SP_FEDIFFUSELIGHTING(object);
283 if (((SPObjectClass *) feDiffuseLighting_parent_class)->child_added)
284 (* ((SPObjectClass *) feDiffuseLighting_parent_class)->child_added)(object, child, ref);
286 sp_feDiffuseLighting_children_modified(f);
287 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
288 }
291 /**
292 * Callback for remove_child event.
293 */
294 static void
295 sp_feDiffuseLighting_remove_child(SPObject *object, Inkscape::XML::Node *child)
296 {
297 SPFeDiffuseLighting *f = SP_FEDIFFUSELIGHTING(object);
299 if (((SPObjectClass *) feDiffuseLighting_parent_class)->remove_child)
300 (* ((SPObjectClass *) feDiffuseLighting_parent_class)->remove_child)(object, child);
302 sp_feDiffuseLighting_children_modified(f);
303 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
304 }
306 static void
307 sp_feDiffuseLighting_order_changed (SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *old_ref, Inkscape::XML::Node *new_ref)
308 {
309 SPFeDiffuseLighting *f = SP_FEDIFFUSELIGHTING(object);
310 if (((SPObjectClass *) (feDiffuseLighting_parent_class))->order_changed)
311 (* ((SPObjectClass *) (feDiffuseLighting_parent_class))->order_changed) (object, child, old_ref, new_ref);
313 sp_feDiffuseLighting_children_modified(f);
314 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
315 }
317 static void sp_feDiffuseLighting_children_modified(SPFeDiffuseLighting *sp_diffuselighting)
318 {
319 if (sp_diffuselighting->renderer) {
320 sp_diffuselighting->renderer->light_type = Inkscape::Filters::NO_LIGHT;
321 if (SP_IS_FEDISTANTLIGHT(sp_diffuselighting->children)) {
322 sp_diffuselighting->renderer->light_type = Inkscape::Filters::DISTANT_LIGHT;
323 sp_diffuselighting->renderer->light.distant = SP_FEDISTANTLIGHT(sp_diffuselighting->children);
324 }
325 if (SP_IS_FEPOINTLIGHT(sp_diffuselighting->children)) {
326 sp_diffuselighting->renderer->light_type = Inkscape::Filters::POINT_LIGHT;
327 sp_diffuselighting->renderer->light.point = SP_FEPOINTLIGHT(sp_diffuselighting->children);
328 }
329 if (SP_IS_FESPOTLIGHT(sp_diffuselighting->children)) {
330 sp_diffuselighting->renderer->light_type = Inkscape::Filters::SPOT_LIGHT;
331 sp_diffuselighting->renderer->light.spot = SP_FESPOTLIGHT(sp_diffuselighting->children);
332 }
333 }
334 }
336 static void sp_feDiffuseLighting_build_renderer(SPFilterPrimitive *primitive, Inkscape::Filters::Filter *filter) {
337 g_assert(primitive != NULL);
338 g_assert(filter != NULL);
340 SPFeDiffuseLighting *sp_diffuselighting = SP_FEDIFFUSELIGHTING(primitive);
342 int primitive_n = filter->add_primitive(Inkscape::Filters::NR_FILTER_DIFFUSELIGHTING);
343 Inkscape::Filters::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
344 Inkscape::Filters::FilterDiffuseLighting *nr_diffuselighting = dynamic_cast<Inkscape::Filters::FilterDiffuseLighting*>(nr_primitive);
345 g_assert(nr_diffuselighting != NULL);
347 sp_diffuselighting->renderer = nr_diffuselighting;
348 sp_filter_primitive_renderer_common(primitive, nr_primitive);
350 nr_diffuselighting->diffuseConstant = sp_diffuselighting->diffuseConstant;
351 nr_diffuselighting->surfaceScale = sp_diffuselighting->surfaceScale;
352 nr_diffuselighting->lighting_color = sp_diffuselighting->lighting_color;
353 //We assume there is at most one child
354 nr_diffuselighting->light_type = Inkscape::Filters::NO_LIGHT;
355 if (SP_IS_FEDISTANTLIGHT(primitive->children)) {
356 nr_diffuselighting->light_type = Inkscape::Filters::DISTANT_LIGHT;
357 nr_diffuselighting->light.distant = SP_FEDISTANTLIGHT(primitive->children);
358 }
359 if (SP_IS_FEPOINTLIGHT(primitive->children)) {
360 nr_diffuselighting->light_type = Inkscape::Filters::POINT_LIGHT;
361 nr_diffuselighting->light.point = SP_FEPOINTLIGHT(primitive->children);
362 }
363 if (SP_IS_FESPOTLIGHT(primitive->children)) {
364 nr_diffuselighting->light_type = Inkscape::Filters::SPOT_LIGHT;
365 nr_diffuselighting->light.spot = SP_FESPOTLIGHT(primitive->children);
366 }
368 //nr_offset->set_dx(sp_offset->dx);
369 //nr_offset->set_dy(sp_offset->dy);
370 }
373 /*
374 Local Variables:
375 mode:c++
376 c-file-style:"stroustrup"
377 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
378 indent-tabs-mode:nil
379 fill-column:99
380 End:
381 */
382 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :