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Diffstat (limited to 'src/live_effects/lpe-simplify.cpp')
| -rw-r--r-- | src/live_effects/lpe-simplify.cpp | 315 |
1 files changed, 315 insertions, 0 deletions
diff --git a/src/live_effects/lpe-simplify.cpp b/src/live_effects/lpe-simplify.cpp new file mode 100644 index 0000000..ccd1b6b --- /dev/null +++ b/src/live_effects/lpe-simplify.cpp @@ -0,0 +1,315 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#include <gtkmm.h> + +#include "live_effects/lpe-simplify.h" + +#include "display/curve.h" +#include "helper/geom.h" +#include "path/path-util.h" +#include "svg/svg.h" +#include "ui/icon-names.h" +#include "ui/tools/node-tool.h" + +#include <2geom/svg-path-parser.h> + +// TODO due to internal breakage in glibmm headers, this must be last: +#include <glibmm/i18n.h> + +namespace Inkscape { +namespace LivePathEffect { + +LPESimplify::LPESimplify(LivePathEffectObject *lpeobject) + : Effect(lpeobject) + , steps(_("Steps:"), _("Change number of simplify steps "), "steps", &wr, this, 1) + , threshold(_("Roughly threshold:"), _("Roughly threshold:"), "threshold", &wr, this, 0.002) + , smooth_angles(_("Smooth angles:"), _("Max degree difference on handles to perform a smooth"), "smooth_angles", + &wr, this, 0.) + , helper_size(_("Helper size:"), _("Helper size"), "helper_size", &wr, this, 5) + , simplify_individual_paths(_("Paths separately"), _("Simplifying paths (separately)"), "simplify_individual_paths", + &wr, this, false, "", INKSCAPE_ICON("on-outline"), INKSCAPE_ICON("off-outline")) + , simplify_just_coalesce(_("Just coalesce"), _("Simplify just coalesce"), "simplify_just_coalesce", &wr, this, + false, "", INKSCAPE_ICON("on-outline"), INKSCAPE_ICON("off-outline")) +{ + registerParameter(&steps); + registerParameter(&threshold); + registerParameter(&smooth_angles); + registerParameter(&helper_size); + registerParameter(&simplify_individual_paths); + registerParameter(&simplify_just_coalesce); + + threshold.param_set_range(0.0001, Geom::infinity()); + threshold.param_set_increments(0.0001, 0.0001); + threshold.param_set_digits(6); + + steps.param_set_range(0, 100); + steps.param_set_increments(1, 1); + steps.param_set_digits(0); + + smooth_angles.param_set_range(0.0, 360.0); + smooth_angles.param_set_increments(10, 10); + smooth_angles.param_set_digits(2); + + helper_size.param_set_range(0.0, 999.0); + helper_size.param_set_increments(5, 5); + helper_size.param_set_digits(2); + + radius_helper_nodes = 6.0; + apply_to_clippath_and_mask = true; +} + +LPESimplify::~LPESimplify() = default; + +void +LPESimplify::doBeforeEffect (SPLPEItem const* lpeitem) +{ + if(!hp.empty()) { + hp.clear(); + } + bbox = lpeitem->visualBounds(); + radius_helper_nodes = helper_size; +} + +Gtk::Widget * +LPESimplify::newWidget() +{ + // use manage here, because after deletion of Effect object, others might still be pointing to this widget. + Gtk::Box *vbox = Gtk::manage(new Gtk::Box(Gtk::ORIENTATION_VERTICAL)); + + vbox->set_border_width(5); + vbox->set_homogeneous(false); + vbox->set_spacing(2); + std::vector<Parameter *>::iterator it = param_vector.begin(); + Gtk::Box * buttons = Gtk::manage(new Gtk::Box(Gtk::ORIENTATION_HORIZONTAL,0)); + while (it != param_vector.end()) { + if ((*it)->widget_is_visible) { + Parameter * param = *it; + Gtk::Widget * widg = dynamic_cast<Gtk::Widget *>(param->param_newWidget()); + if (param->param_key == "simplify_individual_paths" || + param->param_key == "simplify_just_coalesce") { + Glib::ustring * tip = param->param_getTooltip(); + if (widg) { + buttons->pack_start(*widg, true, true, 2); + if (tip) { + widg->set_tooltip_text(*tip); + } else { + widg->set_tooltip_text(""); + widg->set_has_tooltip(false); + } + } + } else { + Glib::ustring * tip = param->param_getTooltip(); + if (widg) { + Gtk::Box * horizontal_box = dynamic_cast<Gtk::Box *>(widg); + std::vector< Gtk::Widget* > child_list = horizontal_box->get_children(); + Gtk::Entry* entry_widg = dynamic_cast<Gtk::Entry *>(child_list[1]); + entry_widg->set_width_chars(8); + vbox->pack_start(*widg, true, true, 2); + if (tip) { + widg->set_tooltip_text(*tip); + } else { + widg->set_tooltip_text(""); + widg->set_has_tooltip(false); + } + } + } + } + + ++it; + } + vbox->pack_start(*buttons,true, true, 2); + if(Gtk::Widget* widg = defaultParamSet()) { + vbox->pack_start(*widg, true, true, 2); + } + return dynamic_cast<Gtk::Widget *>(vbox); +} + +void +LPESimplify::doEffect(SPCurve *curve) +{ + Geom::PathVector const original_pathv = pathv_to_linear_and_cubic_beziers(curve->get_pathvector()); + gdouble size = Geom::L2(bbox->dimensions()); + //size /= Geom::Affine(0,0,0,0,0,0).descrim(); + Path* pathliv = Path_for_pathvector(original_pathv); + if(simplify_individual_paths) { + size = Geom::L2(Geom::bounds_fast(original_pathv)->dimensions()); + } + size /= sp_lpe_item->i2doc_affine().descrim(); + for (int unsigned i = 0; i < steps; i++) { + if ( simplify_just_coalesce ) { + pathliv->Coalesce(threshold * size); + } else { + pathliv->ConvertEvenLines(threshold * size); + pathliv->Simplify(threshold * size); + } + } + Geom::PathVector result = Geom::parse_svg_path(pathliv->svg_dump_path()); + generateHelperPathAndSmooth(result); + curve->set_pathvector(result); + update_helperpath(); +} + +void +LPESimplify::generateHelperPathAndSmooth(Geom::PathVector &result) +{ + if(steps < 1) { + return; + } + Geom::PathVector tmp_path; + Geom::CubicBezier const *cubic = nullptr; + for (auto & path_it : result) { + if (path_it.empty()) { + continue; + } + + Geom::Path::iterator curve_it1 = path_it.begin(); // incoming curve + Geom::Path::iterator curve_it2 = ++(path_it.begin());// outgoing curve + Geom::Path::iterator curve_endit = path_it.end_default(); // this determines when the loop has to stop + SPCurve *nCurve = new SPCurve(); + if (path_it.closed()) { + // if the path is closed, maybe we have to stop a bit earlier because the + // closing line segment has zerolength. + const Geom::Curve &closingline = + path_it.back_closed(); // the closing line segment is always of type + // Geom::LineSegment. + if (are_near(closingline.initialPoint(), closingline.finalPoint())) { + // closingline.isDegenerate() did not work, because it only checks for + // *exact* zero length, which goes wrong for relative coordinates and + // rounding errors... + // the closing line segment has zero-length. So stop before that one! + curve_endit = path_it.end_open(); + } + } + if(helper_size > 0) { + drawNode(curve_it1->initialPoint()); + } + nCurve->moveto(curve_it1->initialPoint()); + Geom::Point start = Geom::Point(0,0); + while (curve_it1 != curve_endit) { + cubic = dynamic_cast<Geom::CubicBezier const *>(&*curve_it1); + Geom::Point point_at1 = curve_it1->initialPoint(); + Geom::Point point_at2 = curve_it1->finalPoint(); + Geom::Point point_at3 = curve_it1->finalPoint(); + Geom::Point point_at4 = curve_it1->finalPoint(); + + if(start == Geom::Point(0,0)) { + start = point_at1; + } + + if (cubic) { + point_at1 = (*cubic)[1]; + point_at2 = (*cubic)[2]; + } + + if(path_it.closed() && curve_it2 == curve_endit) { + point_at4 = start; + } + if(curve_it2 != curve_endit) { + cubic = dynamic_cast<Geom::CubicBezier const *>(&*curve_it2); + if (cubic) { + point_at4 = (*cubic)[1]; + } + } + Geom::Ray ray1(point_at2, point_at3); + Geom::Ray ray2(point_at3, point_at4); + double angle1 = Geom::deg_from_rad(ray1.angle()); + double angle2 = Geom::deg_from_rad(ray2.angle()); + if((smooth_angles >= std::abs(angle2 - angle1)) && !are_near(point_at4,point_at3) && !are_near(point_at2,point_at3)) { + double dist = Geom::distance(point_at2,point_at3); + Geom::Angle angleFixed = ray2.angle(); + angleFixed -= Geom::Angle::from_degrees(180.0); + point_at2 = Geom::Point::polar(angleFixed, dist) + point_at3; + } + nCurve->curveto(point_at1, point_at2, curve_it1->finalPoint()); + cubic = dynamic_cast<Geom::CubicBezier const *>(nCurve->last_segment()); + if (cubic) { + point_at1 = (*cubic)[1]; + point_at2 = (*cubic)[2]; + if(helper_size > 0) { + if(!are_near((*cubic)[0],(*cubic)[1])) { + drawHandle((*cubic)[1]); + drawHandleLine((*cubic)[0],(*cubic)[1]); + } + if(!are_near((*cubic)[3],(*cubic)[2])) { + drawHandle((*cubic)[2]); + drawHandleLine((*cubic)[3],(*cubic)[2]); + } + } + } + if(helper_size > 0) { + drawNode(curve_it1->finalPoint()); + } + ++curve_it1; + ++curve_it2; + } + if (path_it.closed()) { + nCurve->closepath_current(); + } + tmp_path.push_back(nCurve->get_pathvector()[0]); + nCurve->reset(); + delete nCurve; + } + result = tmp_path; +} + +void +LPESimplify::drawNode(Geom::Point p) +{ + double r = radius_helper_nodes; + char const * svgd; + svgd = "M 0.55,0.5 A 0.05,0.05 0 0 1 0.5,0.55 0.05,0.05 0 0 1 0.45,0.5 0.05,0.05 0 0 1 0.5,0.45 0.05,0.05 0 0 1 0.55,0.5 Z M 0,0 1,0 1,1 0,1 Z"; + Geom::PathVector pathv = sp_svg_read_pathv(svgd); + pathv *= Geom::Scale(r) * Geom::Translate(p - Geom::Point(0.5*r,0.5*r)); + hp.push_back(pathv[0]); + hp.push_back(pathv[1]); +} + +void +LPESimplify::drawHandle(Geom::Point p) +{ + double r = radius_helper_nodes; + char const * svgd; + svgd = "M 0.7,0.35 A 0.35,0.35 0 0 1 0.35,0.7 0.35,0.35 0 0 1 0,0.35 0.35,0.35 0 0 1 0.35,0 0.35,0.35 0 0 1 0.7,0.35 Z"; + Geom::PathVector pathv = sp_svg_read_pathv(svgd); + pathv *= Geom::Scale(r) * Geom::Translate(p - Geom::Point(0.35*r,0.35*r)); + hp.push_back(pathv[0]); +} + + +void +LPESimplify::drawHandleLine(Geom::Point p,Geom::Point p2) +{ + Geom::Path path; + path.start( p ); + double diameter = radius_helper_nodes; + if(helper_size > 0 && Geom::distance(p,p2) > (diameter * 0.35)) { + Geom::Ray ray2(p, p2); + p2 = p2 - Geom::Point::polar(ray2.angle(),(diameter * 0.35)); + } + path.appendNew<Geom::LineSegment>( p2 ); + hp.push_back(path); +} + +void +LPESimplify::addCanvasIndicators(SPLPEItem const */*lpeitem*/, std::vector<Geom::PathVector> &hp_vec) +{ + hp_vec.push_back(hp); +} + + +}; //namespace LivePathEffect +}; /* namespace Inkscape */ + +/* + Local Variables: + mode:c++ + c-file-style:"stroustrup" + c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) + indent-tabs-mode:nil + fill-column:99 + End: +*/ +// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 : |