1 /*
2 * Authors:
3 * Ted Gould <ted@gould.cx>
4 *
5 * Copyright (C) 2008 Authors
6 *
7 * Released under GNU GPL, read the file 'COPYING' for more information
8 */
10 #include "desktop.h"
11 #include "selection.h"
12 #include "document-private.h"
13 #include "sp-item.h"
14 #include "util/glib-list-iterators.h"
15 #include "extension/extension.h"
16 #include "extension/effect.h"
17 #include "extension/system.h"
18 #include "xml/repr.h"
19 #include "xml/simple-node.h"
20 #include "xml/attribute-record.h"
22 #include "filter.h"
24 namespace Inkscape {
25 namespace Extension {
26 namespace Internal {
27 namespace Filter {
29 Filter::Filter() :
30 Inkscape::Extension::Implementation::Implementation(),
31 _filter(NULL) {
32 return;
33 }
35 Filter::Filter(gchar const * filter) :
36 Inkscape::Extension::Implementation::Implementation(),
37 _filter(filter) {
38 return;
39 }
41 Filter::~Filter (void) {
42 if (_filter != NULL) {
43 _filter = NULL;
44 }
46 return;
47 }
49 bool
50 Filter::load (Inkscape::Extension::Extension *module)
51 {
52 return true;
53 }
55 Inkscape::Extension::Implementation::ImplementationDocumentCache *
56 Filter::newDocCache (Inkscape::Extension::Extension * ext, Inkscape::UI::View::View * doc)
57 {
58 return NULL;
59 }
61 gchar const *
62 Filter::get_filter_text (Inkscape::Extension::Extension * ext)
63 {
64 return _filter;
65 }
67 Inkscape::XML::Document *
68 Filter::get_filter (Inkscape::Extension::Extension * ext) {
69 gchar const * filter = get_filter_text(ext);
70 return sp_repr_read_mem(filter, strlen(filter), NULL);
71 }
73 void
74 Filter::merge_filters (Inkscape::XML::Node * to, Inkscape::XML::Node * from, Inkscape::XML::Document * doc, gchar * srcGraphic, gchar * srcGraphicAlpha)
75 {
76 if (from == NULL) return;
78 // copy attributes
79 for ( Inkscape::Util::List<Inkscape::XML::AttributeRecord const> iter = from->attributeList() ;
80 iter ; ++iter ) {
81 gchar const * attr = g_quark_to_string(iter->key);
82 //printf("Attribute List: %s\n", attr);
83 if (!strcmp(attr, "id")) continue; // nope, don't copy that one!
84 to->setAttribute(attr, from->attribute(attr));
86 if (!strcmp(attr, "in") || !strcmp(attr, "in2") || !strcmp(attr, "in3")) {
87 if (srcGraphic != NULL && !strcmp(from->attribute(attr), "SourceGraphic")) {
88 to->setAttribute(attr, srcGraphic);
89 }
91 if (srcGraphicAlpha != NULL && !strcmp(from->attribute(attr), "SourceAlpha")) {
92 to->setAttribute(attr, srcGraphicAlpha);
93 }
94 }
95 }
97 // for each child call recursively
98 for (Inkscape::XML::Node * from_child = from->firstChild();
99 from_child != NULL ; from_child = from_child->next()) {
100 Glib::ustring name = "svg:";
101 name += from_child->name();
103 Inkscape::XML::Node * to_child = doc->createElement(name.c_str());
104 to->appendChild(to_child);
105 merge_filters(to_child, from_child, doc, srcGraphic, srcGraphicAlpha);
107 if (from_child == from->firstChild() && !strcmp("filter", from->name()) && srcGraphic != NULL && to_child->attribute("in") == NULL) {
108 to_child->setAttribute("in", srcGraphic);
109 }
110 Inkscape::GC::release(to_child);
111 }
112 }
114 #define FILTER_SRC_GRAPHIC "fbSourceGraphic"
115 #define FILTER_SRC_GRAPHIC_ALPHA "fbSourceGraphicAlpha"
117 void
118 Filter::effect (Inkscape::Extension::Effect *module, Inkscape::UI::View::View *document, Inkscape::Extension::Implementation::ImplementationDocumentCache * docCache)
119 {
120 Inkscape::XML::Document *filterdoc = get_filter(module);
121 if (filterdoc == NULL) {
122 return; // could not parse the XML source of the filter; typically parser will stderr a warning
123 }
125 //printf("Calling filter effect\n");
126 Inkscape::Selection * selection = ((SPDesktop *)document)->selection;
128 using Inkscape::Util::GSListConstIterator;
129 // TODO need to properly refcount the items, at least
130 std::list<SPItem *> items;
131 items.insert<GSListConstIterator<SPItem *> >(items.end(), selection->itemList(), NULL);
133 Inkscape::XML::Document * xmldoc = sp_document_repr_doc(document->doc());
134 Inkscape::XML::Node * defsrepr = SP_OBJECT_REPR(SP_DOCUMENT_DEFS(document->doc()));
136 for(std::list<SPItem *>::iterator item = items.begin();
137 item != items.end(); item++) {
138 SPItem * spitem = *item;
139 Inkscape::XML::Node * node = SP_OBJECT_REPR(spitem);
141 SPCSSAttr * css = sp_repr_css_attr(node, "style");
142 gchar const * filter = sp_repr_css_property(css, "filter", NULL);
144 if (filter == NULL) {
146 Inkscape::XML::Node * newfilterroot = xmldoc->createElement("svg:filter");
147 defsrepr->appendChild(newfilterroot);
149 Glib::ustring url = "url(#"; url += newfilterroot->attribute("id"); url += ")";
151 merge_filters(newfilterroot, filterdoc->root(), xmldoc);
153 Inkscape::GC::release(newfilterroot);
155 sp_repr_css_set_property(css, "filter", url.c_str());
156 sp_repr_css_set(node, css, "style");
157 } else {
158 if (strncmp(filter, "url(#", strlen("url(#")) || filter[strlen(filter) - 1] != ')') {
159 // This is not url(#id) -- we can't handle it
160 continue;
161 }
163 gchar * lfilter = g_strndup(filter + 5, strlen(filter) - 6);
164 Inkscape::XML::Node * filternode = NULL;
165 for (Inkscape::XML::Node * child = defsrepr->firstChild(); child != NULL; child = child->next()) {
166 if (!strcmp(lfilter, child->attribute("id"))) {
167 filternode = child;
168 break;
169 }
170 }
171 g_free(lfilter);
173 // no filter
174 if (filternode == NULL) {
175 g_warning("no assoziating filter found!");
176 continue;
177 }
179 if (filternode->lastChild() == NULL) {
180 // empty filter, we insert
181 merge_filters(filternode, filterdoc->root(), xmldoc);
182 } else {
183 // existing filter, we merge
184 filternode->lastChild()->setAttribute("result", FILTER_SRC_GRAPHIC);
185 Inkscape::XML::Node * alpha = xmldoc->createElement("svg:feColorMatrix");
186 alpha->setAttribute("result", FILTER_SRC_GRAPHIC_ALPHA);
187 alpha->setAttribute("in", FILTER_SRC_GRAPHIC); // not required, but we're being explicit
188 alpha->setAttribute("values", "0 0 0 -1 0 0 0 0 -1 0 0 0 0 -1 0 0 0 0 1 0");
190 filternode->appendChild(alpha);
192 merge_filters(filternode, filterdoc->root(), xmldoc, FILTER_SRC_GRAPHIC, FILTER_SRC_GRAPHIC_ALPHA);
194 Inkscape::GC::release(alpha);
195 }
196 }
197 }
199 return;
200 }
202 #include "extension/internal/clear-n_.h"
204 void
205 Filter::filter_init (gchar const * id, gchar const * name, gchar const * submenu, gchar const * tip, gchar const * filter)
206 {
207 gchar * xml_str = g_strdup_printf(
208 "<inkscape-extension xmlns=\"" INKSCAPE_EXTENSION_URI "\">\n"
209 "<name>%s</name>\n"
210 "<id>org.inkscape.effect.filter.%s</id>\n"
211 "<effect>\n"
212 "<object-type>all</object-type>\n"
213 "<effects-menu>\n"
214 "<submenu name=\"" N_("Filters") "\" />\n"
215 "<submenu name=\"%s\"/>\n"
216 "</effects-menu>\n"
217 "<menu-tip>%s</menu-tip>\n"
218 "</effect>\n"
219 "</inkscape-extension>\n", name, id, submenu, tip);
220 Inkscape::Extension::build_from_mem(xml_str, new Filter::Filter(filter));
221 g_free(xml_str);
222 return;
223 }
225 }; /* namespace Filter */
226 }; /* namespace Internal */
227 }; /* namespace Extension */
228 }; /* namespace Inkscape */