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// SPDX-License-Identifier: GPL-2.0-or-later
#ifndef SEEN_INKSCAPE_EXTENSION_INTERNAL_FILTER_IMAGE_H__
#define SEEN_INKSCAPE_EXTENSION_INTERNAL_FILTER_IMAGE_H__
/* Change the 'IMAGE' above to be your file name */
/*
* Copyright (C) 2011 Authors:
* Ivan Louette (filters)
* Nicolas Dufour (UI) <nicoduf@yahoo.fr>
*
* Image filters
* Edge detect
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
/* ^^^ Change the copyright to be you and your e-mail address ^^^ */
#include "filter.h"
#include "extension/internal/clear-n_.h"
#include "extension/system.h"
#include "extension/extension.h"
namespace Inkscape {
namespace Extension {
namespace Internal {
namespace Filter {
/**
\brief Custom predefined Edge detect filter.
Detect color edges in object.
Filter's parameters:
* Detection type (enum, default Full) -> convolve (kernelMatrix)
* Level (0.01->10., default 1.) -> convolve (divisor)
* Inverted (boolean, default false) -> convolve (bias)
*/
class EdgeDetect : public Inkscape::Extension::Internal::Filter::Filter {
protected:
gchar const * get_filter_text (Inkscape::Extension::Extension * ext) override;
public:
EdgeDetect ( ) : Filter() { };
~EdgeDetect ( ) override { if (_filter != nullptr) g_free((void *)_filter); return; }
static void init () {
// clang-format off
Inkscape::Extension::build_from_mem(
"<inkscape-extension xmlns=\"" INKSCAPE_EXTENSION_URI "\">\n"
"<name>" N_("Edge Detect") "</name>\n"
"<id>org.inkscape.effect.filter.EdgeDetect</id>\n"
"<param name=\"type\" gui-text=\"" N_("Detect:") "\" type=\"optiongroup\" appearance=\"combo\" >\n"
"<option value=\"all\">" N_("All") "</option>\n"
"<option value=\"vertical\">" N_("Vertical lines") "</option>\n"
"<option value=\"horizontal\">" N_("Horizontal lines") "</option>\n"
"</param>\n"
"<param name=\"level\" gui-text=\"" N_("Level") "\" type=\"float\" appearance=\"full\" min=\"0.1\" max=\"100.0\">1.0</param>\n"
"<param name=\"inverted\" gui-text=\"" N_("Invert colors") "\" type=\"bool\" >false</param>\n"
"<effect>\n"
"<object-type>all</object-type>\n"
"<effects-menu>\n"
"<submenu name=\"" N_("Filters") "\">\n"
"<submenu name=\"" N_("Image Effects") "\"/>\n"
"</submenu>\n"
"</effects-menu>\n"
"<menu-tip>" N_("Detect color edges in object") "</menu-tip>\n"
"</effect>\n"
"</inkscape-extension>\n", new EdgeDetect());
// clang-format on
};
};
gchar const *
EdgeDetect::get_filter_text (Inkscape::Extension::Extension * ext)
{
if (_filter != nullptr) g_free((void *)_filter);
std::ostringstream matrix;
std::ostringstream inverted;
std::ostringstream level;
const gchar *type = ext->get_param_optiongroup("type");
level << 1 / ext->get_param_float("level");
if ((g_ascii_strcasecmp("vertical", type) == 0)) {
matrix << "0 0 0 1 -2 1 0 0 0";
} else if ((g_ascii_strcasecmp("horizontal", type) == 0)) {
matrix << "0 1 0 0 -2 0 0 1 0";
} else {
matrix << "0 1 0 1 -4 1 0 1 0";
}
if (ext->get_param_bool("inverted")) {
inverted << "1";
} else {
inverted << "0";
}
// clang-format off
_filter = g_strdup_printf(
"<filter xmlns:inkscape=\"http://www.inkscape.org/namespaces/inkscape\" style=\"color-interpolation-filters:sRGB;\" inkscape:label=\"Edge Detect\">\n"
"<feConvolveMatrix in=\"SourceGraphic\" kernelMatrix=\"%s\" order=\"3 3\" bias=\"%s\" divisor=\"%s\" targetX=\"1\" targetY=\"1\" preserveAlpha=\"true\" result=\"convolve\" />\n"
"</filter>\n", matrix.str().c_str(), inverted.str().c_str(), level.str().c_str());
// clang-format on
return _filter;
};
}; /* namespace Filter */
}; /* namespace Internal */
}; /* namespace Extension */
}; /* namespace Inkscape */
/* Change the 'IMAGE' below to be your file name */
#endif /* SEEN_INKSCAPE_EXTENSION_INTERNAL_FILTER_IMAGE_H__ */
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