created libwinnie (library), winnie (the server application) and clients

[winnie] / libwinnie / src / geom.cc

diff --git a/libwinnie/src/geom.cc b/libwinnie/src/geom.cc
new file mode 100644 (file)
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+++ b/libwinnie/src/geom.cc
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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;
+}