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Diffstat (limited to 'src/3rdparty/2geom/include/2geom/int-point.h')
| -rw-r--r-- | src/3rdparty/2geom/include/2geom/int-point.h | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/src/3rdparty/2geom/include/2geom/int-point.h b/src/3rdparty/2geom/include/2geom/int-point.h new file mode 100644 index 0000000..2a951a3 --- /dev/null +++ b/src/3rdparty/2geom/include/2geom/int-point.h @@ -0,0 +1,180 @@ +/** + * \file + * \brief Cartesian point / 2D vector with integer coordinates + *//* + * Copyright 2011 Krzysztof Kosiński <tweenk.pl@gmail.com> + * + * This library is free software; you can redistribute it and/or + * modify it either under the terms of the GNU Lesser General Public + * License version 2.1 as published by the Free Software Foundation + * (the "LGPL") or, at your option, under the terms of the Mozilla + * Public License Version 1.1 (the "MPL"). If you do not alter this + * notice, a recipient may use your version of this file under either + * the MPL or the LGPL. + * + * You should have received a copy of the LGPL along with this library + * in the file COPYING-LGPL-2.1; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * You should have received a copy of the MPL along with this library + * in the file COPYING-MPL-1.1 + * + * The contents of this file are subject to the Mozilla Public License + * Version 1.1 (the "License"); you may not use this file except in + * compliance with the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY + * OF ANY KIND, either express or implied. See the LGPL or the MPL for + * the specific language governing rights and limitations. + */ + +#ifndef LIB2GEOM_SEEN_INT_POINT_H +#define LIB2GEOM_SEEN_INT_POINT_H + +#include <stdexcept> +#include <boost/operators.hpp> +#include <2geom/coord.h> + +namespace Geom { + +/** + * @brief Two-dimensional point with integer coordinates. + * + * This class is an exact equivalent of Point, except it stores integer coordinates. + * Integer points are useful in contexts related to rasterized graphics, for example + * for bounding boxes when rendering SVG. + * + * @see Point + * @ingroup Primitives */ +class IntPoint + : boost::additive< IntPoint + , boost::totally_ordered< IntPoint + > > +{ + IntCoord _pt[2]; +public: + /// @name Creating integer points + /// @{ + IntPoint() { } + IntPoint(IntCoord x, IntCoord y) { + _pt[X] = x; + _pt[Y] = y; + } + /// @} + + /// @name Access the coordinates of a point + /// @{ + IntCoord operator[](unsigned i) const { + if ( i > Y ) throw std::out_of_range("index out of range"); + return _pt[i]; + } + IntCoord &operator[](unsigned i) { + if ( i > Y ) throw std::out_of_range("index out of range"); + return _pt[i]; + } + IntCoord operator[](Dim2 d) const { return _pt[d]; } + IntCoord &operator[](Dim2 d) { return _pt[d]; } + + IntCoord x() const noexcept { return _pt[X]; } + IntCoord &x() noexcept { return _pt[X]; } + IntCoord y() const noexcept { return _pt[Y]; } + IntCoord &y() noexcept { return _pt[Y]; } + /// @} + + /// @name Vector-like arithmetic operations + /// @{ + IntPoint operator-() const { + IntPoint ret(-_pt[X], -_pt[Y]); + return ret; + } + IntPoint &operator+=(IntPoint const &o) { + _pt[X] += o._pt[X]; + _pt[Y] += o._pt[Y]; + return *this; + } + IntPoint &operator-=(IntPoint const &o) { + _pt[X] -= o._pt[X]; + _pt[Y] -= o._pt[Y]; + return *this; + } + /// @} + + /// @name Various utilities + /// @{ + /** @brief Equality operator. */ + bool operator==(IntPoint const &in_pnt) const { + return ((_pt[X] == in_pnt[X]) && (_pt[Y] == in_pnt[Y])); + } + /** @brief Lexicographical ordering for points. + * Y coordinate is regarded as more significant. When sorting according to this + * ordering, the points will be sorted according to the Y coordinate, and within + * points with the same Y coordinate according to the X coordinate. */ + bool operator<(IntPoint const &p) const { + return ( ( _pt[Y] < p[Y] ) || + (( _pt[Y] == p[Y] ) && ( _pt[X] < p[X] ))); + } + /// @} + + /** @brief Lexicographical ordering functor. + * @param d The more significant dimension */ + template <Dim2 d> struct LexLess; + /** @brief Lexicographical ordering functor. + * @param d The more significant dimension */ + template <Dim2 d> struct LexGreater; + /** @brief Lexicographical ordering functor with runtime dimension. */ + struct LexLessRt { + LexLessRt(Dim2 d) : dim(d) {} + inline bool operator()(IntPoint const &a, IntPoint const &b) const; + private: + Dim2 dim; + }; + /** @brief Lexicographical ordering functor with runtime dimension. */ + struct LexGreaterRt { + LexGreaterRt(Dim2 d) : dim(d) {} + inline bool operator()(IntPoint const &a, IntPoint const &b) const; + private: + Dim2 dim; + }; +}; + +template<> struct IntPoint::LexLess<X> { + bool operator()(IntPoint const &a, IntPoint const &b) const { + return a[X] < b[X] || (a[X] == b[X] && a[Y] < b[Y]); + } +}; +template<> struct IntPoint::LexLess<Y> { + bool operator()(IntPoint const &a, IntPoint const &b) const { + return a[Y] < b[Y] || (a[Y] == b[Y] && a[X] < b[X]); + } +}; +template<> struct IntPoint::LexGreater<X> { + bool operator()(IntPoint const &a, IntPoint const &b) const { + return a[X] > b[X] || (a[X] == b[X] && a[Y] > b[Y]); + } +}; +template<> struct IntPoint::LexGreater<Y> { + bool operator()(IntPoint const &a, IntPoint const &b) const { + return a[Y] > b[Y] || (a[Y] == b[Y] && a[X] > b[X]); + } +}; +inline bool IntPoint::LexLessRt::operator()(IntPoint const &a, IntPoint const &b) const { + return dim ? IntPoint::LexLess<Y>()(a, b) : IntPoint::LexLess<X>()(a, b); +} +inline bool IntPoint::LexGreaterRt::operator()(IntPoint const &a, IntPoint const &b) const { + return dim ? IntPoint::LexGreater<Y>()(a, b) : IntPoint::LexGreater<X>()(a, b); +} + +} // namespace Geom + +#endif // !SEEN_GEOM_INT_POINT_H + +/* + 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 : |