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/*
winnie - an experimental window system
Copyright (C) 2013 Eleni Maria Stea
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Author: Eleni Maria Stea <elene.mst@gmail.com>
*/
#include "geom.h"
Rect::Rect() { x = y = width = height = 0; }
Rect::Rect(int x, int y, int w, int h)
{
this->x = x;
this->y = y;
width = w;
height = h;
}
static inline int
min(int x, int y)
{
return x < y ? x : y;
}
static inline int
max(int x, int y)
{
return x > y ? x : y;
}
Rect
rect_union(const Rect &a, const Rect &b)
{
Rect uni;
uni.x = min(a.x, b.x);
uni.y = min(a.y, b.y);
uni.width = max(a.x + a.width, b.x + b.width) - uni.x;
uni.height = max(a.y + a.height, b.y + b.height) - uni.y;
return uni;
}
Rect
rect_intersection(const Rect &a, const Rect &b)
{
Rect intersect;
intersect.x = max(a.x, b.x);
intersect.y = max(a.y, b.y);
intersect.width = max(min(a.x + a.width, b.x + b.width) - intersect.x, 0);
intersect.height = max(min(a.y + a.height, b.y + b.height) - intersect.y, 0);
return intersect;
}
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