79 lines
2.6 KiB
C++
79 lines
2.6 KiB
C++
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/**
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******************************************************************************
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*
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* @file rectangle.cpp
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* @author The OpenPilot Team, http://www.openpilot.org Copyright (C) 2012.
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* @brief
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* @see The GNU Public License (GPL) Version 3
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* @defgroup OPMapWidget
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* @{
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*
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*****************************************************************************/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "rectangle.h"
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namespace internals {
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Rectangle Rectangle::Empty = Rectangle();
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Rectangle Rectangle::FromLTRB(int left, int top, int right, int bottom)
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{
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return Rectangle(left,
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top,
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right - left,
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bottom - top);
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}
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Rectangle Rectangle::Inflate(Rectangle rect, int x, int y)
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{
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Rectangle r = rect;
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r.Inflate(x, y);
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return r;
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}
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Rectangle Rectangle::Intersect(Rectangle a, Rectangle b)
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{
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int x1 = std::max(a.X(), b.X());
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int x2 = std::min(a.X() + a.Width(), b.X() + b.Width());
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int y1 = std::max(a.Y(), b.Y());
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int y2 = std::min(a.Y() + a.Height(), b.Y() + b.Height());
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if (x2 >= x1
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&& y2 >= y1) {
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return Rectangle(x1, y1, x2 - x1, y2 - y1);
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}
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return Rectangle::Empty;
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}
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Rectangle Rectangle::Union(const Rectangle &a, const Rectangle &b)
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{
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int x1 = std::min(a.x, b.x);
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int x2 = std::max(a.x + a.width, b.x + b.width);
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int y1 = std::min(a.y, b.y);
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int y2 = std::max(a.y + a.height, b.y + b.height);
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return Rectangle(x1, y1, x2 - x1, y2 - y1);
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}
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bool operator==(Rectangle const & lhs, Rectangle const & rhs)
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{
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return lhs.x == rhs.x && lhs.y == rhs.y && lhs.width == rhs.width && lhs.height == rhs.height;
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}
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uint qHash(Rectangle const & rect)
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{
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return (int)((quint32)rect.x ^
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(((quint32)rect.y << 13) | ((quint32)rect.y >> 19)) ^
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(((quint32)rect.width << 26) | ((quint32)rect.width >> 6)) ^
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(((quint32)rect.height << 7) | ((quint32)rect.height >> 25)));
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}
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}
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