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// SPDX-License-Identifier: GPL-2.0-or-later
/**
\file bluredge.cpp
A plug-in to add an effect to blur the edges of an object.
*/
/*
* Authors:
* Ted Gould <ted@gould.cx>
*
* Copyright (C) 2005 Authors
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include "bluredge.h"
#include <vector>
#include "desktop.h"
#include "document.h"
#include "selection.h"
#include "preferences.h"
#include "path-chemistry.h"
#include "object/sp-item.h"
#include "extension/effect.h"
#include "extension/system.h"
#include "path/path-offset.h"
namespace Inkscape {
namespace Extension {
namespace Internal {
/**
\brief A function to allocated anything -- just an example here
\param module Unused
\return Whether the load was successful
*/
bool
BlurEdge::load (Inkscape::Extension::Extension */*module*/)
{
// std::cout << "Hey, I'm Blur Edge, I'm loading!" << std::endl;
return TRUE;
}
/**
\brief This actually blurs the edge.
\param module The effect that was called (unused)
\param desktop What should be edited.
*/
void
BlurEdge::effect (Inkscape::Extension::Effect *module, Inkscape::UI::View::View *view, Inkscape::Extension::Implementation::ImplementationDocumentCache * /*docCache*/)
{
auto desktop = dynamic_cast<SPDesktop *>(view);
if (!desktop) {
std::cerr << "BlurEdge::effect: view is not desktop!" << std::endl;
return;
}
Inkscape::Selection * selection = desktop->selection;
double width = module->get_param_float("blur-width");
int steps = module->get_param_int("num-steps");
Inkscape::Preferences *prefs = Inkscape::Preferences::get();
double old_offset = prefs->getDouble("/options/defaultoffsetwidth/value", 1.0, "px");
// TODO need to properly refcount the items, at least
std::vector<SPItem*> items(selection->items().begin(), selection->items().end());
selection->clear();
for(auto spitem : items) {
std::vector<Inkscape::XML::Node *> new_items(steps);
Inkscape::XML::Document *xml_doc = desktop->doc()->getReprDoc();
Inkscape::XML::Node * new_group = xml_doc->createElement("svg:g");
spitem->getRepr()->parent()->appendChild(new_group);
double orig_opacity = sp_repr_css_double_property(sp_repr_css_attr(spitem->getRepr(), "style"), "opacity", 1.0);
char opacity_string[64];
g_ascii_formatd(opacity_string, sizeof(opacity_string), "%f",
orig_opacity / (steps));
for (int i = 0; i < steps; i++) {
double offset = (width / (float)(steps - 1) * (float)i) - (width / 2.0);
new_items[i] = spitem->getRepr()->duplicate(xml_doc);
SPCSSAttr * css = sp_repr_css_attr(new_items[i], "style");
sp_repr_css_set_property(css, "opacity", opacity_string);
sp_repr_css_change(new_items[i], css, "style");
new_group->appendChild(new_items[i]);
selection->add(new_items[i]);
selection->toCurves();
selection->removeLPESRecursive(true);
selection->unlinkRecursive(true);
if (offset < 0.0) {
/* Doing an inset here folks */
offset *= -1.0;
prefs->setDoubleUnit("/options/defaultoffsetwidth/value", offset, "px");
sp_selected_path_inset(desktop);
} else if (offset > 0.0) {
prefs->setDoubleUnit("/options/defaultoffsetwidth/value", offset, "px");
sp_selected_path_offset(desktop);
}
selection->clear();
}
Inkscape::GC::release(new_group);
}
prefs->setDoubleUnit("/options/defaultoffsetwidth/value", old_offset, "px");
selection->clear();
selection->add(items.begin(), items.end());
return;
}
Gtk::Widget *
BlurEdge::prefs_effect(Inkscape::Extension::Effect * module, Inkscape::UI::View::View * /*view*/, sigc::signal<void> * changeSignal, Inkscape::Extension::Implementation::ImplementationDocumentCache * /*docCache*/)
{
return module->autogui(nullptr, nullptr, changeSignal);
}
#include "clear-n_.h"
void
BlurEdge::init ()
{
// clang-format off
Inkscape::Extension::build_from_mem(
"<inkscape-extension xmlns=\"" INKSCAPE_EXTENSION_URI "\">\n"
"<name>" N_("Inset/Outset Halo") "</name>\n"
"<id>org.inkscape.effect.bluredge</id>\n"
"<param name=\"blur-width\" gui-text=\"" N_("Width:") "\" gui-description=\"" N_("Width in px of the halo") "\" type=\"float\" min=\"1.0\" max=\"50.0\">1.0</param>\n"
"<param name=\"num-steps\" gui-text=\"" N_("Number of steps:") "\" gui-description=\"" N_("Number of inset/outset copies of the object to make") "\" type=\"int\" min=\"5\" max=\"100\">11</param>\n"
"<effect>\n"
"<object-type>all</object-type>\n"
"<effects-menu>\n"
"<submenu name=\"" N_("Generate from Path") "\" />\n"
"</effects-menu>\n"
"</effect>\n"
"</inkscape-extension>\n" , new BlurEdge());
// clang-format on
return;
}
}; /* namespace Internal */
}; /* namespace Extension */
}; /* 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 :
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