1 #define __SP_FEIMAGE_CPP__
3 /** \file
4 * SVG <feImage> implementation.
5 *
6 */
7 /*
8 * Authors:
9 * Felipe CorrĂȘa da Silva Sanches <felipe.sanches@gmail.com>
10 * hugo Rodrigues <haa.rodrigues@gmail.com>
11 *
12 * Copyright (C) 2007 Felipe Sanches
13 * Copyright (C) 2006 Hugo Rodrigues
14 *
15 * Released under GNU GPL, read the file 'COPYING' for more information
16 */
18 #ifdef HAVE_CONFIG_H
19 # include "config.h"
20 #endif
21 #include "uri.h"
22 #include "uri-references.h"
23 #include "attributes.h"
24 #include "svg/svg.h"
25 #include "image.h"
26 #include "xml/repr.h"
27 #include <string.h>
29 #include "display/nr-filter.h"
30 #include "display/nr-filter-image.h"
32 /* FeImage base class */
34 static void sp_feImage_class_init(SPFeImageClass *klass);
35 static void sp_feImage_init(SPFeImage *feImage);
37 static void sp_feImage_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
38 static void sp_feImage_release(SPObject *object);
39 static void sp_feImage_set(SPObject *object, unsigned int key, gchar const *value);
40 static void sp_feImage_update(SPObject *object, SPCtx *ctx, guint flags);
41 static Inkscape::XML::Node *sp_feImage_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);
42 static void sp_feImage_build_renderer(SPFilterPrimitive *primitive, Inkscape::Filters::Filter *filter);
44 static SPFilterPrimitiveClass *feImage_parent_class;
46 GType
47 sp_feImage_get_type()
48 {
49 static GType feImage_type = 0;
51 if (!feImage_type) {
52 GTypeInfo feImage_info = {
53 sizeof(SPFeImageClass),
54 NULL, NULL,
55 (GClassInitFunc) sp_feImage_class_init,
56 NULL, NULL,
57 sizeof(SPFeImage),
58 16,
59 (GInstanceInitFunc) sp_feImage_init,
60 NULL, /* value_table */
61 };
62 feImage_type = g_type_register_static(SP_TYPE_FILTER_PRIMITIVE, "SPFeImage", &feImage_info, (GTypeFlags)0);
63 }
64 return feImage_type;
65 }
67 static void
68 sp_feImage_class_init(SPFeImageClass *klass)
69 {
70 SPObjectClass *sp_object_class = (SPObjectClass *)klass;
71 SPFilterPrimitiveClass * sp_primitive_class = (SPFilterPrimitiveClass *)klass;
73 feImage_parent_class = (SPFilterPrimitiveClass*)g_type_class_peek_parent(klass);
75 sp_object_class->build = sp_feImage_build;
76 sp_object_class->release = sp_feImage_release;
77 sp_object_class->write = sp_feImage_write;
78 sp_object_class->set = sp_feImage_set;
79 sp_object_class->update = sp_feImage_update;
81 sp_primitive_class->build_renderer = sp_feImage_build_renderer;
82 }
84 static void
85 sp_feImage_init(SPFeImage */*feImage*/)
86 {
87 }
89 /**
90 * Reads the Inkscape::XML::Node, and initializes SPFeImage variables. For this to get called,
91 * our name must be associated with a repr via "sp_object_type_register". Best done through
92 * sp-object-repr.cpp's repr_name_entries array.
93 */
94 static void
95 sp_feImage_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
96 {
97 // Save document reference so we can load images with relative paths.
98 SPFeImage *feImage = SP_FEIMAGE(object);
99 feImage->document = document;
101 if (((SPObjectClass *) feImage_parent_class)->build) {
102 ((SPObjectClass *) feImage_parent_class)->build(object, document, repr);
103 }
105 /*LOAD ATTRIBUTES FROM REPR HERE*/
107 sp_object_read_attr(object, "x");
108 sp_object_read_attr(object, "y");
109 sp_object_read_attr(object, "width");
110 sp_object_read_attr(object, "height");
111 sp_object_read_attr(object, "xlink:href");
113 }
115 /**
116 * Drops any allocated memory.
117 */
118 static void
119 sp_feImage_release(SPObject *object)
120 {
121 SPFeImage *feImage = SP_FEIMAGE(object);
122 feImage->_image_modified_connection.disconnect();
123 feImage->_href_modified_connection.disconnect();
124 if (feImage->SVGElemRef) delete feImage->SVGElemRef;
126 if (((SPObjectClass *) feImage_parent_class)->release)
127 ((SPObjectClass *) feImage_parent_class)->release(object);
128 }
130 static void
131 sp_feImage_elem_modified(SPObject* /*href*/, guint /*flags*/, SPObject* obj)
132 {
133 obj->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
134 }
136 static void
137 sp_feImage_href_modified(SPObject* old_elem, SPObject* new_elem, SPObject* obj)
138 {
139 SPFeImage *feImage = SP_FEIMAGE(obj);
140 feImage->_image_modified_connection.disconnect();
141 if (new_elem) {
142 feImage->SVGElem = SP_ITEM(new_elem);
143 feImage->_image_modified_connection = ((SPObject*) feImage->SVGElem)->connectModified(sigc::bind(sigc::ptr_fun(&sp_feImage_elem_modified), obj));
144 } else {
145 feImage->SVGElem = 0;
146 }
148 obj->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
149 }
151 /**
152 * Sets a specific value in the SPFeImage.
153 */
154 static void
155 sp_feImage_set(SPObject *object, unsigned int key, gchar const *value)
156 {
157 SPFeImage *feImage = SP_FEIMAGE(object);
158 (void)feImage;
159 switch(key) {
160 /*DEAL WITH SETTING ATTRIBUTES HERE*/
161 case SP_ATTR_XLINK_HREF:
162 if (feImage->href) {
163 g_free(feImage->href);
164 }
165 feImage->href = (value) ? g_strdup (value) : NULL;
166 if (!feImage->href) return;
167 delete feImage->SVGElemRef;
168 feImage->SVGElemRef = 0;
169 feImage->SVGElem = 0;
170 feImage->_image_modified_connection.disconnect();
171 feImage->_href_modified_connection.disconnect();
172 try{
173 Inkscape::URI SVGElem_uri(feImage->href);
174 feImage->SVGElemRef = new Inkscape::URIReference(feImage->document);
175 feImage->SVGElemRef->attach(SVGElem_uri);
176 feImage->from_element = true;
177 feImage->_href_modified_connection = feImage->SVGElemRef->changedSignal().connect(sigc::bind(sigc::ptr_fun(&sp_feImage_href_modified), object));
178 if (SPObject *elemref = feImage->SVGElemRef->getObject()) {
179 feImage->SVGElem = SP_ITEM(elemref);
180 feImage->_image_modified_connection = ((SPObject*) feImage->SVGElem)->connectModified(sigc::bind(sigc::ptr_fun(&sp_feImage_elem_modified), object));
181 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
182 break;
183 } else {
184 g_warning("SVG element URI was not found in the document while loading feImage");
185 }
186 }
187 catch(const Inkscape::UnsupportedURIException & e)
188 {
189 feImage->from_element = false;
190 /* This occurs when using external image as the source */
191 //g_warning("caught Inkscape::UnsupportedURIException in sp_feImage_set");
192 break;
193 }
194 break;
196 case SP_ATTR_X:
197 feImage->x.readOrUnset(value);
198 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
199 break;
200 case SP_ATTR_Y:
201 feImage->y.readOrUnset(value);
202 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
203 break;
204 case SP_ATTR_WIDTH:
205 feImage->width.readOrUnset(value);
206 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
207 break;
208 case SP_ATTR_HEIGHT:
209 feImage->height.readOrUnset(value);
210 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
211 break;
212 default:
213 if (((SPObjectClass *) feImage_parent_class)->set)
214 ((SPObjectClass *) feImage_parent_class)->set(object, key, value);
215 break;
216 }
218 }
220 /**
221 * Receives update notifications.
222 */
223 static void
224 sp_feImage_update(SPObject *object, SPCtx *ctx, guint flags)
225 {
227 if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG |
228 SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
230 /* do something to trigger redisplay, updates? */
231 }
233 if (((SPObjectClass *) feImage_parent_class)->update) {
234 ((SPObjectClass *) feImage_parent_class)->update(object, ctx, flags);
235 }
236 }
238 /**
239 * Writes its settings to an incoming repr object, if any.
240 */
241 static Inkscape::XML::Node *
242 sp_feImage_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags)
243 {
244 /* TODO: Don't just clone, but create a new repr node and write all
245 * relevant values into it */
246 if (!repr) {
247 repr = SP_OBJECT_REPR(object)->duplicate(doc);
248 }
250 if (((SPObjectClass *) feImage_parent_class)->write) {
251 ((SPObjectClass *) feImage_parent_class)->write(object, doc, repr, flags);
252 }
254 return repr;
255 }
257 static void sp_feImage_build_renderer(SPFilterPrimitive *primitive, Inkscape::Filters::Filter *filter) {
258 g_assert(primitive != NULL);
259 g_assert(filter != NULL);
261 SPFeImage *sp_image = SP_FEIMAGE(primitive);
263 int primitive_n = filter->add_primitive(Inkscape::Filters::NR_FILTER_IMAGE);
264 Inkscape::Filters::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
265 Inkscape::Filters::FilterImage *nr_image = dynamic_cast<Inkscape::Filters::FilterImage*>(nr_primitive);
266 g_assert(nr_image != NULL);
268 sp_filter_primitive_renderer_common(primitive, nr_primitive);
270 nr_image->from_element = sp_image->from_element;
271 nr_image->SVGElem = sp_image->SVGElem;
272 nr_image->set_region(sp_image->x, sp_image->y, sp_image->width, sp_image->height);
273 nr_image->set_href(sp_image->href);
274 nr_image->set_document(sp_image->document);
275 }
277 /*
278 Local Variables:
279 mode:c++
280 c-file-style:"stroustrup"
281 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
282 indent-tabs-mode:nil
283 fill-column:99
284 End:
285 */
286 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :