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Merge pull request #9097 from piotr-semenov:fix/cv_rect_monoid_identity

This commit is contained in:
Alexander Alekhin
2017-08-01 13:06:37 +00:00
+11 -6
View File
@@ -1803,12 +1803,17 @@ Rect_<_Tp>& operator &= ( Rect_<_Tp>& a, const Rect_<_Tp>& b )
template<typename _Tp> static inline
Rect_<_Tp>& operator |= ( Rect_<_Tp>& a, const Rect_<_Tp>& b )
{
_Tp x1 = std::min(a.x, b.x);
_Tp y1 = std::min(a.y, b.y);
a.width = std::max(a.x + a.width, b.x + b.width) - x1;
a.height = std::max(a.y + a.height, b.y + b.height) - y1;
a.x = x1;
a.y = y1;
if (!a.area()) {
a = b;
}
else if (b.area()) {
_Tp x1 = std::min(a.x, b.x);
_Tp y1 = std::min(a.y, b.y);
a.width = std::max(a.x + a.width, b.x + b.width) - x1;
a.height = std::max(a.y + a.height, b.y + b.height) - y1;
a.x = x1;
a.y = y1;
}
return a;
}