Adding upstream version 1.3.upstream/1.3upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 202 insertions, 0 deletions

diff --git a/include/2geom/int-point.h b/include/2geom/int-point.h
new file mode 100644
index 0000000..6dbed11
--- /dev/null
+++ b/include/2geom/int-point.h
@@ -0,0 +1,202 @@
+/**
+ *  \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
+    , boost::multiplicative< IntPoint, IntCoord
+    , boost::multiplicative< IntPoint
+    > > > >
+{
+    IntCoord _pt[2] = { 0, 0 };
+public:
+    /// @name Create integer points
+    /// @{
+    /** Construct a point at the origin. */
+    IntPoint() = default;
+    /** Construct a point from its coordinates. */
+    IntPoint(IntCoord x, IntCoord y)
+        : _pt{ x, 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 {
+        return IntPoint(-_pt[X], -_pt[Y]);
+    }
+    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;
+    }
+    IntPoint &operator*=(IntPoint const &o) {
+        _pt[X] *= o._pt[X];
+        _pt[Y] *= o._pt[Y];
+        return *this;
+    }
+    IntPoint &operator*=(IntCoord o) {
+        _pt[X] *= o;
+        _pt[Y] *= o;
+        return *this;
+    }
+    IntPoint &operator/=(IntPoint const &o) {
+        _pt[X] /= o._pt[X];
+        _pt[Y] /= o._pt[Y];
+        return *this;
+    }
+    IntPoint &operator/=(IntCoord o) {
+        _pt[X] /= o;
+        _pt[Y] /= o;
+        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 :