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* Ted Gould <ted@gould.cx>
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* Copyright (C) 2008 Authors
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* Released under GNU GPL, read the file 'COPYING' for more information
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#include "selection.h"
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#include "document-private.h"
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#include "util/glib-list-iterators.h"
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#include "extension/extension.h"
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#include "extension/effect.h"
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#include "extension/system.h"
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#include "xml/simple-node.h"
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#include "xml/attribute-record.h"
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Inkscape::Extension::Implementation::Implementation(),
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Filter::Filter(gchar const * filter) :
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Inkscape::Extension::Implementation::Implementation(),
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Filter::~Filter (void) {
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if (_filter != NULL) {
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Filter::load (Inkscape::Extension::Extension *module)
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Inkscape::Extension::Implementation::ImplementationDocumentCache *
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Filter::newDocCache (Inkscape::Extension::Extension * ext, Inkscape::UI::View::View * doc)
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Filter::get_filter_text (Inkscape::Extension::Extension * ext)
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Inkscape::XML::Document *
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Filter::get_filter (Inkscape::Extension::Extension * ext) {
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gchar const * filter = get_filter_text(ext);
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return sp_repr_read_mem(filter, strlen(filter), NULL);
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Filter::merge_filters (Inkscape::XML::Node * to, Inkscape::XML::Node * from, Inkscape::XML::Document * doc, gchar * srcGraphic, gchar * srcGraphicAlpha)
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if (from == NULL) return;
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for ( Inkscape::Util::List<Inkscape::XML::AttributeRecord const> iter = from->attributeList() ;
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gchar const * attr = g_quark_to_string(iter->key);
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//printf("Attribute List: %s\n", attr);
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if (!strcmp(attr, "id")) continue; // nope, don't copy that one!
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to->setAttribute(attr, from->attribute(attr));
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if (!strcmp(attr, "in") || !strcmp(attr, "in2") || !strcmp(attr, "in3")) {
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if (srcGraphic != NULL && !strcmp(from->attribute(attr), "SourceGraphic")) {
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to->setAttribute(attr, srcGraphic);
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if (srcGraphicAlpha != NULL && !strcmp(from->attribute(attr), "SourceAlpha")) {
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to->setAttribute(attr, srcGraphicAlpha);
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// for each child call recursively
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for (Inkscape::XML::Node * from_child = from->firstChild();
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from_child != NULL ; from_child = from_child->next()) {
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Glib::ustring name = "svg:";
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name += from_child->name();
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Inkscape::XML::Node * to_child = doc->createElement(name.c_str());
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to->appendChild(to_child);
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merge_filters(to_child, from_child, doc, srcGraphic, srcGraphicAlpha);
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if (from_child == from->firstChild() && !strcmp("filter", from->name()) && srcGraphic != NULL && to_child->attribute("in") == NULL) {
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to_child->setAttribute("in", srcGraphic);
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Inkscape::GC::release(to_child);
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#define FILTER_SRC_GRAPHIC "fbSourceGraphic"
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#define FILTER_SRC_GRAPHIC_ALPHA "fbSourceGraphicAlpha"
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Filter::effect (Inkscape::Extension::Effect *module, Inkscape::UI::View::View *document, Inkscape::Extension::Implementation::ImplementationDocumentCache * docCache)
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Inkscape::XML::Document *filterdoc = get_filter(module);
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if (filterdoc == NULL) {
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return; // could not parse the XML source of the filter; typically parser will stderr a warning
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//printf("Calling filter effect\n");
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Inkscape::Selection * selection = ((SPDesktop *)document)->selection;
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using Inkscape::Util::GSListConstIterator;
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// TODO need to properly refcount the items, at least
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std::list<SPItem *> items;
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items.insert<GSListConstIterator<SPItem *> >(items.end(), selection->itemList(), NULL);
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Inkscape::XML::Document * xmldoc = sp_document_repr_doc(document->doc());
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Inkscape::XML::Node * defsrepr = SP_OBJECT_REPR(SP_DOCUMENT_DEFS(document->doc()));
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for(std::list<SPItem *>::iterator item = items.begin();
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item != items.end(); item++) {
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SPItem * spitem = *item;
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Inkscape::XML::Node * node = SP_OBJECT_REPR(spitem);
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SPCSSAttr * css = sp_repr_css_attr(node, "style");
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gchar const * filter = sp_repr_css_property(css, "filter", NULL);
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if (filter == NULL) {
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Inkscape::XML::Node * newfilterroot = xmldoc->createElement("svg:filter");
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defsrepr->appendChild(newfilterroot);
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Glib::ustring url = "url(#"; url += newfilterroot->attribute("id"); url += ")";
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merge_filters(newfilterroot, filterdoc->root(), xmldoc);
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Inkscape::GC::release(newfilterroot);
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sp_repr_css_set_property(css, "filter", url.c_str());
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sp_repr_css_set(node, css, "style");
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if (strncmp(filter, "url(#", strlen("url(#")) || filter[strlen(filter) - 1] != ')') {
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// This is not url(#id) -- we can't handle it
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gchar * lfilter = g_strndup(filter + 5, strlen(filter) - 6);
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Inkscape::XML::Node * filternode = NULL;
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for (Inkscape::XML::Node * child = defsrepr->firstChild(); child != NULL; child = child->next()) {
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if (!strcmp(lfilter, child->attribute("id"))) {
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if (filternode == NULL) {
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filternode->lastChild()->setAttribute("result", FILTER_SRC_GRAPHIC);
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Inkscape::XML::Node * alpha = xmldoc->createElement("svg:feColorMatrix");
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alpha->setAttribute("result", FILTER_SRC_GRAPHIC_ALPHA);
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alpha->setAttribute("in", FILTER_SRC_GRAPHIC); // not required, but we're being explicit
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alpha->setAttribute("values", "0 0 0 -1 0 0 0 0 -1 0 0 0 0 -1 0 0 0 0 1 0");
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filternode->appendChild(alpha);
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merge_filters(filternode, filterdoc->root(), xmldoc, FILTER_SRC_GRAPHIC, FILTER_SRC_GRAPHIC_ALPHA);
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Inkscape::GC::release(alpha);
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#include "extension/internal/clear-n_.h"
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Filter::filter_init (gchar const * id, gchar const * name, gchar const * submenu, gchar const * tip, gchar const * filter)
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gchar * xml_str = g_strdup_printf(
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"<inkscape-extension xmlns=\"" INKSCAPE_EXTENSION_URI "\">\n"
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"<id>org.inkscape.effect.filter.%s</id>\n"
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"<object-type>all</object-type>\n"
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"<submenu name=\"" N_("Filters") "\" />\n"
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"<submenu name=\"%s\"/>\n"
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"<menu-tip>%s</menu-tip>\n"
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"</inkscape-extension>\n", name, id, submenu, tip);
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Inkscape::Extension::build_from_mem(xml_str, new Filter::Filter(filter));
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}; /* namespace Filter */
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}; /* namespace Internal */
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}; /* namespace Extension */
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}; /* namespace Inkscape */