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// SPDX-License-Identifier: GPL-2.0-or-later
/** @file
* TODO: insert short description here
*//*
* Authors: see git history
*
* Copyright (C) 2018 Authors
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#ifndef SEEN_INKSCAPE_LIVAROT_PATH_DESCRIPTION_H
#define SEEN_INKSCAPE_LIVAROT_PATH_DESCRIPTION_H
#include <2geom/point.h>
#include "svg/stringstream.h"
// path description commands
/* FIXME: these should be unnecessary once the refactoring of the path
** description stuff is finished.
*/
enum
{
descr_moveto = 0, // a moveto
descr_lineto = 1, // a (guess what) lineto
descr_cubicto = 2,
descr_bezierto = 3, // "beginning" of a quadratic bezier spline, will contain its endpoint (i know, it's bad...)
descr_arcto = 4,
descr_close = 5,
descr_interm_bezier = 6, // control point of the bezier spline
descr_forced = 7,
descr_type_mask = 15 // the command no will be stored in a "flags" field, potentially with other info, so we need
// a mask to AND the field and extract the command
};
struct PathDescr
{
PathDescr() : flags(0), associated(-1), tSt(0), tEn(1) {}
PathDescr(int f) : flags(f), associated(-1), tSt(0), tEn(1) {}
virtual ~PathDescr() = default;
int getType() const { return flags & descr_type_mask; }
void setType(int t) {
flags &= ~descr_type_mask;
flags |= t;
}
virtual void dumpSVG(Inkscape::SVGOStringStream &/*s*/, Geom::Point const &/*last*/) const {}
virtual PathDescr *clone() const = 0;
virtual void dump(std::ostream &/*s*/) const {}
int flags; // most notably contains the path command no
int associated; // index in the polyline of the point that ends the path portion of this command
double tSt;
double tEn;
};
struct PathDescrMoveTo : public PathDescr
{
PathDescrMoveTo(Geom::Point const &pp)
: PathDescr(descr_moveto), p(pp) {}
void dumpSVG(Inkscape::SVGOStringStream &s, Geom::Point const &last) const override;
PathDescr *clone() const override;
void dump(std::ostream &s) const override;
Geom::Point p;
};
struct PathDescrLineTo : public PathDescr
{
PathDescrLineTo(Geom::Point const &pp)
: PathDescr(descr_lineto), p(pp) {}
void dumpSVG(Inkscape::SVGOStringStream &s, Geom::Point const &last) const override;
PathDescr *clone() const override;
void dump(std::ostream &s) const override;
Geom::Point p;
};
// quadratic bezier curves: a set of control points, and an endpoint
struct PathDescrBezierTo : public PathDescr
{
PathDescrBezierTo(Geom::Point const &pp, int n)
: PathDescr(descr_bezierto), p(pp), nb(n) {}
PathDescr *clone() const override;
void dump(std::ostream &s) const override;
Geom::Point p; // the endpoint's coordinates
int nb; // number of control points, stored in the next path description commands
};
/* FIXME: I don't think this should be necessary */
struct PathDescrIntermBezierTo : public PathDescr
{
PathDescrIntermBezierTo()
: PathDescr(descr_interm_bezier) , p(0, 0) {}
PathDescrIntermBezierTo(Geom::Point const &pp)
: PathDescr(descr_interm_bezier), p(pp) {}
PathDescr *clone() const override;
void dump(std::ostream &s) const override;
Geom::Point p; // control point coordinates
};
// cubic spline curve: 2 tangents and one endpoint
struct PathDescrCubicTo : public PathDescr
{
PathDescrCubicTo(Geom::Point const &pp, Geom::Point const &s, Geom::Point const& e)
: PathDescr(descr_cubicto), p(pp), start(s), end(e) {}
void dumpSVG(Inkscape::SVGOStringStream &s, Geom::Point const &last) const override;
PathDescr *clone() const override;
void dump(std::ostream &s) const override;
Geom::Point p;
Geom::Point start;
Geom::Point end;
};
// arc: endpoint, 2 radii and one angle, plus 2 booleans to choose the arc (svg style)
struct PathDescrArcTo : public PathDescr
{
PathDescrArcTo(Geom::Point const &pp, double x, double y, double a, bool l, bool c)
: PathDescr(descr_arcto), p(pp), rx(x), ry(y), angle(a), large(l), clockwise(c) {}
void dumpSVG(Inkscape::SVGOStringStream &s, Geom::Point const &last) const override;
PathDescr *clone() const override;
void dump(std::ostream &s) const override;
Geom::Point p;
double rx;
double ry;
double angle;
bool large;
bool clockwise;
};
struct PathDescrForced : public PathDescr
{
PathDescrForced() : PathDescr(descr_forced), p(0, 0) {}
PathDescr *clone() const override;
/* FIXME: not sure whether _forced should have a point associated with it;
** Path::ConvertForcedToMoveTo suggests that maybe it should.
*/
Geom::Point p;
};
struct PathDescrClose : public PathDescr
{
PathDescrClose() : PathDescr(descr_close) {}
void dumpSVG(Inkscape::SVGOStringStream &s, Geom::Point const &last) const override;
PathDescr *clone() const override;
/* FIXME: not sure whether _forced should have a point associated with it;
** Path::ConvertForcedToMoveTo suggests that maybe it should.
*/
Geom::Point p;
};
#endif
/*
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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