1 /** \file
2 * SVG <feImage> implementation.
3 *
4 */
5 /*
6 * Authors:
7 * Felipe CorrĂȘa da Silva Sanches <juca@members.fsf.org>
8 * hugo Rodrigues <haa.rodrigues@gmail.com>
9 * Abhishek Sharma
10 *
11 * Copyright (C) 2007 Felipe Sanches
12 * Copyright (C) 2006 Hugo Rodrigues
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
20 #include "uri.h"
21 #include "uri-references.h"
22 #include "attributes.h"
23 #include "svg/svg.h"
24 #include "image.h"
25 #include "xml/repr.h"
26 #include <string.h>
28 #include "display/nr-filter.h"
29 #include "display/nr-filter-image.h"
31 /* FeImage base class */
33 static void sp_feImage_class_init(SPFeImageClass *klass);
34 static void sp_feImage_init(SPFeImage *feImage);
36 static void sp_feImage_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
37 static void sp_feImage_release(SPObject *object);
38 static void sp_feImage_set(SPObject *object, unsigned int key, gchar const *value);
39 static void sp_feImage_update(SPObject *object, SPCtx *ctx, guint flags);
40 static Inkscape::XML::Node *sp_feImage_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);
41 static void sp_feImage_build_renderer(SPFilterPrimitive *primitive, Inkscape::Filters::Filter *filter);
43 static SPFilterPrimitiveClass *feImage_parent_class;
45 GType sp_feImage_get_type()
46 {
47 static GType feImage_type = 0;
49 if (!feImage_type) {
50 GTypeInfo feImage_info = {
51 sizeof(SPFeImageClass),
52 NULL, NULL,
53 (GClassInitFunc) sp_feImage_class_init,
54 NULL, NULL,
55 sizeof(SPFeImage),
56 16,
57 (GInstanceInitFunc) sp_feImage_init,
58 NULL, /* value_table */
59 };
60 feImage_type = g_type_register_static(SP_TYPE_FILTER_PRIMITIVE, "SPFeImage", &feImage_info, (GTypeFlags)0);
61 }
62 return feImage_type;
63 }
65 static void sp_feImage_class_init(SPFeImageClass *klass)
66 {
67 SPObjectClass *sp_object_class = (SPObjectClass *)klass;
68 SPFilterPrimitiveClass * sp_primitive_class = (SPFilterPrimitiveClass *)klass;
70 feImage_parent_class = (SPFilterPrimitiveClass*)g_type_class_peek_parent(klass);
72 sp_object_class->build = sp_feImage_build;
73 sp_object_class->release = sp_feImage_release;
74 sp_object_class->write = sp_feImage_write;
75 sp_object_class->set = sp_feImage_set;
76 sp_object_class->update = sp_feImage_update;
78 sp_primitive_class->build_renderer = sp_feImage_build_renderer;
79 }
81 static void sp_feImage_init(SPFeImage */*feImage*/)
82 {
83 }
85 /**
86 * Reads the Inkscape::XML::Node, and initializes SPFeImage variables. For this to get called,
87 * our name must be associated with a repr via "sp_object_type_register". Best done through
88 * sp-object-repr.cpp's repr_name_entries array.
89 */
90 static void sp_feImage_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
91 {
92 // Save document reference so we can load images with relative paths.
93 SPFeImage *feImage = SP_FEIMAGE(object);
94 feImage->document = document;
96 if (((SPObjectClass *) feImage_parent_class)->build) {
97 ((SPObjectClass *) feImage_parent_class)->build(object, document, repr);
98 }
100 /*LOAD ATTRIBUTES FROM REPR HERE*/
102 object->readAttr( "x" );
103 object->readAttr( "y" );
104 object->readAttr( "width" );
105 object->readAttr( "height" );
106 object->readAttr( "xlink:href" );
108 }
110 /**
111 * Drops any allocated memory.
112 */
113 static void sp_feImage_release(SPObject *object)
114 {
115 SPFeImage *feImage = SP_FEIMAGE(object);
116 feImage->_image_modified_connection.disconnect();
117 feImage->_href_modified_connection.disconnect();
118 if (feImage->SVGElemRef) delete feImage->SVGElemRef;
120 if (((SPObjectClass *) feImage_parent_class)->release)
121 ((SPObjectClass *) feImage_parent_class)->release(object);
122 }
124 static void sp_feImage_elem_modified(SPObject* /*href*/, guint /*flags*/, SPObject* obj)
125 {
126 obj->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
127 }
129 static void sp_feImage_href_modified(SPObject* /*old_elem*/, SPObject* new_elem, SPObject* obj)
130 {
131 SPFeImage *feImage = SP_FEIMAGE(obj);
132 feImage->_image_modified_connection.disconnect();
133 if (new_elem) {
134 feImage->SVGElem = SP_ITEM(new_elem);
135 feImage->_image_modified_connection = ((SPObject*) feImage->SVGElem)->connectModified(sigc::bind(sigc::ptr_fun(&sp_feImage_elem_modified), obj));
136 } else {
137 feImage->SVGElem = 0;
138 }
140 obj->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
141 }
143 /**
144 * Sets a specific value in the SPFeImage.
145 */
146 static void sp_feImage_set(SPObject *object, unsigned int key, gchar const *value)
147 {
148 SPFeImage *feImage = SP_FEIMAGE(object);
149 (void)feImage;
150 switch(key) {
151 /*DEAL WITH SETTING ATTRIBUTES HERE*/
152 case SP_ATTR_XLINK_HREF:
153 if (feImage->href) {
154 g_free(feImage->href);
155 }
156 feImage->href = (value) ? g_strdup (value) : NULL;
157 if (!feImage->href) return;
158 delete feImage->SVGElemRef;
159 feImage->SVGElemRef = 0;
160 feImage->SVGElem = 0;
161 feImage->_image_modified_connection.disconnect();
162 feImage->_href_modified_connection.disconnect();
163 try{
164 Inkscape::URI SVGElem_uri(feImage->href);
165 feImage->SVGElemRef = new Inkscape::URIReference(feImage->document);
166 feImage->SVGElemRef->attach(SVGElem_uri);
167 feImage->from_element = true;
168 feImage->_href_modified_connection = feImage->SVGElemRef->changedSignal().connect(sigc::bind(sigc::ptr_fun(&sp_feImage_href_modified), object));
169 if (SPObject *elemref = feImage->SVGElemRef->getObject()) {
170 feImage->SVGElem = SP_ITEM(elemref);
171 feImage->_image_modified_connection = ((SPObject*) feImage->SVGElem)->connectModified(sigc::bind(sigc::ptr_fun(&sp_feImage_elem_modified), object));
172 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
173 break;
174 } else {
175 g_warning("SVG element URI was not found in the document while loading feImage");
176 }
177 }
178 // catches either MalformedURIException or UnsupportedURIException
179 catch(const Inkscape::BadURIException & e)
180 {
181 feImage->from_element = false;
182 /* This occurs when using external image as the source */
183 //g_warning("caught Inkscape::BadURIException in sp_feImage_set");
184 break;
185 }
186 break;
188 case SP_ATTR_X:
189 feImage->x.readOrUnset(value);
190 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
191 break;
192 case SP_ATTR_Y:
193 feImage->y.readOrUnset(value);
194 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
195 break;
196 case SP_ATTR_WIDTH:
197 feImage->width.readOrUnset(value);
198 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
199 break;
200 case SP_ATTR_HEIGHT:
201 feImage->height.readOrUnset(value);
202 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
203 break;
204 default:
205 if (((SPObjectClass *) feImage_parent_class)->set)
206 ((SPObjectClass *) feImage_parent_class)->set(object, key, value);
207 break;
208 }
210 }
212 /**
213 * Receives update notifications.
214 */
215 static void sp_feImage_update(SPObject *object, SPCtx *ctx, guint flags)
216 {
218 if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG |
219 SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
221 /* do something to trigger redisplay, updates? */
222 }
224 if (((SPObjectClass *) feImage_parent_class)->update) {
225 ((SPObjectClass *) feImage_parent_class)->update(object, ctx, flags);
226 }
227 }
229 /**
230 * Writes its settings to an incoming repr object, if any.
231 */
232 static Inkscape::XML::Node * sp_feImage_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags)
233 {
234 /* TODO: Don't just clone, but create a new repr node and write all
235 * relevant values into it */
236 if (!repr) {
237 repr = SP_OBJECT_REPR(object)->duplicate(doc);
238 }
240 if (((SPObjectClass *) feImage_parent_class)->write) {
241 ((SPObjectClass *) feImage_parent_class)->write(object, doc, repr, flags);
242 }
244 return repr;
245 }
247 static void sp_feImage_build_renderer(SPFilterPrimitive *primitive, Inkscape::Filters::Filter *filter) {
248 g_assert(primitive != NULL);
249 g_assert(filter != NULL);
251 SPFeImage *sp_image = SP_FEIMAGE(primitive);
253 int primitive_n = filter->add_primitive(Inkscape::Filters::NR_FILTER_IMAGE);
254 Inkscape::Filters::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
255 Inkscape::Filters::FilterImage *nr_image = dynamic_cast<Inkscape::Filters::FilterImage*>(nr_primitive);
256 g_assert(nr_image != NULL);
258 sp_filter_primitive_renderer_common(primitive, nr_primitive);
260 nr_image->from_element = sp_image->from_element;
261 nr_image->SVGElem = sp_image->SVGElem;
262 nr_image->set_region(sp_image->x, sp_image->y, sp_image->width, sp_image->height);
263 nr_image->set_href(sp_image->href);
264 nr_image->set_document(sp_image->document);
265 }
267 /*
268 Local Variables:
269 mode:c++
270 c-file-style:"stroustrup"
271 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
272 indent-tabs-mode:nil
273 fill-column:99
274 End:
275 */
276 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :