Geom::PathVector SvgFont::flip_coordinate_system(SPFont* spfont, Geom::PathVector pathv){ double units_per_em = 1000; SPObject* obj; for (obj = ((SPObject*) spfont)->children; obj; obj=obj->next){ if (SP_IS_FONTFACE(obj)){ //XML Tree being directly used here while it shouldn't be. sp_repr_get_double(obj->getRepr(), "units_per_em", &units_per_em); } } double baseline_offset = units_per_em - spfont->horiz_origin_y; //This matrix flips y-axis and places the origin at baseline Geom::Affine m(Geom::Coord(1),Geom::Coord(0),Geom::Coord(0),Geom::Coord(-1),Geom::Coord(0),Geom::Coord(baseline_offset)); return pathv*m; }
/** * Threaded method that does single bitmap--->path conversion */ void Tracer::traceThread() { //## Remember. NEVER leave this method without setting //## engine back to NULL //## Prepare our kill flag. We will watch this later to //## see if the main thread wants us to stop keepGoing = true; SPDesktop *desktop = SP_ACTIVE_DESKTOP; if (!desktop) { g_warning("Trace: No active desktop\n"); return; } Inkscape::MessageStack *msgStack = sp_desktop_message_stack(desktop); Inkscape::Selection *selection = sp_desktop_selection (desktop); if (!SP_ACTIVE_DOCUMENT) { char *msg = _("Trace: No active document"); msgStack->flash(Inkscape::ERROR_MESSAGE, msg); //g_warning(msg); engine = NULL; return; } SPDocument *doc = SP_ACTIVE_DOCUMENT; sp_document_ensure_up_to_date(doc); SPImage *img = getSelectedSPImage(); if (!img) { engine = NULL; return; } Glib::RefPtr<Gdk::Pixbuf> pixbuf = Glib::wrap(img->pixbuf, true); pixbuf = sioxProcessImage(img, pixbuf); if (!pixbuf) { char *msg = _("Trace: Image has no bitmap data"); msgStack->flash(Inkscape::ERROR_MESSAGE, msg); //g_warning(msg); engine = NULL; return; } msgStack->flash(Inkscape::NORMAL_MESSAGE, _("Trace: Starting trace...")); desktop->updateCanvasNow(); std::vector<TracingEngineResult> results = engine->trace(pixbuf); //printf("nrPaths:%d\n", results.size()); int nrPaths = results.size(); //### Check if we should stop if (!keepGoing || nrPaths<1) { engine = NULL; return; } //### Get pointers to the <image> and its parent Inkscape::XML::Node *imgRepr = SP_OBJECT(img)->repr; Inkscape::XML::Node *par = sp_repr_parent(imgRepr); //### Get some information for the new transform() double x = 0.0; double y = 0.0; double width = 0.0; double height = 0.0; double dval = 0.0; if (sp_repr_get_double(imgRepr, "x", &dval)) x = dval; if (sp_repr_get_double(imgRepr, "y", &dval)) y = dval; if (sp_repr_get_double(imgRepr, "width", &dval)) width = dval; if (sp_repr_get_double(imgRepr, "height", &dval)) height = dval; double iwidth = (double)pixbuf->get_width(); double iheight = (double)pixbuf->get_height(); double iwscale = width / iwidth; double ihscale = height / iheight; Geom::Translate trans(x, y); Geom::Scale scal(iwscale, ihscale); //# Convolve scale, translation, and the original transform Geom::Matrix tf(scal * trans); tf *= img->transform; //#OK. Now let's start making new nodes Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc()); Inkscape::XML::Node *groupRepr = NULL; //# if more than 1, make a <g>roup of <path>s if (nrPaths > 1) { groupRepr = xml_doc->createElement("svg:g"); par->addChild(groupRepr, imgRepr); } long totalNodeCount = 0L; for (unsigned int i=0 ; i<results.size() ; i++) { TracingEngineResult result = results[i]; totalNodeCount += result.getNodeCount(); Inkscape::XML::Node *pathRepr = xml_doc->createElement("svg:path"); pathRepr->setAttribute("style", result.getStyle().c_str()); pathRepr->setAttribute("d", result.getPathData().c_str()); if (nrPaths > 1) groupRepr->addChild(pathRepr, NULL); else par->addChild(pathRepr, imgRepr); //### Apply the transform from the image to the new shape SPObject *reprobj = doc->getObjectByRepr(pathRepr); if (reprobj) { SPItem *newItem = SP_ITEM(reprobj); sp_item_write_transform(newItem, pathRepr, tf, NULL); } if (nrPaths == 1) { selection->clear(); selection->add(pathRepr); } Inkscape::GC::release(pathRepr); } // If we have a group, then focus on, then forget it if (nrPaths > 1) { selection->clear(); selection->add(groupRepr); Inkscape::GC::release(groupRepr); } //## inform the document, so we can undo sp_document_done(doc, SP_VERB_SELECTION_TRACE, _("Trace bitmap")); engine = NULL; char *msg = g_strdup_printf(_("Trace: Done. %ld nodes created"), totalNodeCount); msgStack->flash(Inkscape::NORMAL_MESSAGE, msg); g_free(msg); }