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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 16:29:01 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 16:29:01 +0000
commit35a96bde514a8897f6f0fcc41c5833bf63df2e2a (patch)
tree657d15a03cc46bd099fc2c6546a7a4ad43815d9f /src/2geom/int-point.h
parentInitial commit. (diff)
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Adding upstream version 1.0.2.upstream/1.0.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+/**
+ * \file
+ * \brief Cartesian point / 2D vector with integer coordinates
+ *//*
+ * Copyright 2011 Krzysztof KosiƄski <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 throw() { return _pt[X]; }
+ IntCoord &x() throw() { return _pt[X]; }
+ IntCoord y() const throw() { return _pt[Y]; }
+ IntCoord &y() throw() { 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 :