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// SPDX-License-Identifier: GPL-2.0-or-later
/** \file
* SVG <feMorphology> implementation.
*
*/
/*
* Authors:
* Felipe Sanches <juca@members.fsf.org>
* Hugo Rodrigues <haa.rodrigues@gmail.com>
* Abhishek Sharma
*
* Copyright (C) 2006 Hugo Rodrigues
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include <cstring>
#include "attributes.h"
#include "svg/svg.h"
#include "morphology.h"
#include "xml/repr.h"
#include "display/nr-filter.h"
SPFeMorphology::SPFeMorphology() : SPFilterPrimitive() {
this->Operator = Inkscape::Filters::MORPHOLOGY_OPERATOR_ERODE;
//Setting default values:
this->radius.set("0");
}
SPFeMorphology::~SPFeMorphology() = default;
/**
* Reads the Inkscape::XML::Node, and initializes SPFeMorphology variables. For this to get called,
* our name must be associated with a repr via "sp_object_type_register". Best done through
* sp-object-repr.cpp's repr_name_entries array.
*/
void SPFeMorphology::build(SPDocument *document, Inkscape::XML::Node *repr) {
SPFilterPrimitive::build(document, repr);
/*LOAD ATTRIBUTES FROM REPR HERE*/
this->readAttr(SPAttr::OPERATOR);
this->readAttr(SPAttr::RADIUS);
}
/**
* Drops any allocated memory.
*/
void SPFeMorphology::release() {
SPFilterPrimitive::release();
}
static Inkscape::Filters::FilterMorphologyOperator sp_feMorphology_read_operator(gchar const *value){
if (!value) {
return Inkscape::Filters::MORPHOLOGY_OPERATOR_ERODE; //erode is default
}
switch(value[0]){
case 'e':
if (strncmp(value, "erode", 5) == 0) {
return Inkscape::Filters::MORPHOLOGY_OPERATOR_ERODE;
}
break;
case 'd':
if (strncmp(value, "dilate", 6) == 0) {
return Inkscape::Filters::MORPHOLOGY_OPERATOR_DILATE;
}
break;
}
return Inkscape::Filters::MORPHOLOGY_OPERATOR_ERODE; //erode is default
}
/**
* Sets a specific value in the SPFeMorphology.
*/
void SPFeMorphology::set(SPAttr key, gchar const *value) {
Inkscape::Filters::FilterMorphologyOperator read_operator;
switch(key) {
/*DEAL WITH SETTING ATTRIBUTES HERE*/
case SPAttr::OPERATOR:
read_operator = sp_feMorphology_read_operator(value);
if (read_operator != this->Operator){
this->Operator = read_operator;
this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
break;
case SPAttr::RADIUS:
this->radius.set(value);
//From SVG spec: If <y-radius> is not provided, it defaults to <x-radius>.
if (this->radius.optNumIsSet() == false) {
this->radius.setOptNumber(this->radius.getNumber());
}
this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
break;
default:
SPFilterPrimitive::set(key, value);
break;
}
}
/**
* Receives update notifications.
*/
void SPFeMorphology::update(SPCtx *ctx, guint flags) {
if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG |
SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
/* do something to trigger redisplay, updates? */
}
SPFilterPrimitive::update(ctx, flags);
}
/**
* Writes its settings to an incoming repr object, if any.
*/
Inkscape::XML::Node* SPFeMorphology::write(Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags) {
/* TODO: Don't just clone, but create a new repr node and write all
* relevant values into it */
if (!repr) {
repr = this->getRepr()->duplicate(doc);
}
SPFilterPrimitive::write(doc, repr, flags);
return repr;
}
void SPFeMorphology::build_renderer(Inkscape::Filters::Filter* filter) {
g_assert(filter != nullptr);
int primitive_n = filter->add_primitive(Inkscape::Filters::NR_FILTER_MORPHOLOGY);
Inkscape::Filters::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
Inkscape::Filters::FilterMorphology *nr_morphology = dynamic_cast<Inkscape::Filters::FilterMorphology*>(nr_primitive);
g_assert(nr_morphology != nullptr);
this->renderer_common(nr_primitive);
nr_morphology->set_operator(this->Operator);
nr_morphology->set_xradius( this->radius.getNumber() );
nr_morphology->set_yradius( this->radius.getOptNumber() );
}
/**
* Calculate the region taken up by a mophoplogy primitive
*
* @param region The original shape's region or previous primitive's region output.
*/
Geom::Rect SPFeMorphology::calculate_region(Geom::Rect region)
{
auto r = region;
if (Operator == Inkscape::Filters::MORPHOLOGY_OPERATOR_DILATE) {
if (radius.optNumIsSet()) {
r.expandBy(radius.getNumber(), radius.getOptNumber());
} else {
r.expandBy(radius.getNumber());
}
} else if (Operator == Inkscape::Filters::MORPHOLOGY_OPERATOR_ERODE) {
if (radius.optNumIsSet()) {
r.expandBy(-1 * radius.getNumber(), -1 * radius.getOptNumber());
} else {
r.expandBy(-1 * radius.getNumber());
}
}
return r;
}
/*
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:fileencoding=utf-8:textwidth=99 :
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