-static inline Coord
-safe_add (Coord a, Coord b)
-{
- if (((COORD_MAX - a) <= b) || ((COORD_MAX - b) <= a)) {
- return COORD_MAX;
- }
-
- return a + b;
-}
-
-Duple
-Duple::translate (Duple t) const
-{
- Duple d;
-
- d.x = safe_add (x, t.x);
- d.y = safe_add (y, t.y);
-
- return d;
-}
-
-boost::optional<Rect>
-Rect::intersection (Rect const & o) const
-{
- Rect i;
-
- i.x0 = max (x0, o.x0);
- i.y0 = max (y0, o.y0);
- i.x1 = min (x1, o.x1);
- i.y1 = min (y1, o.y1);
-
- if (i.x0 > i.x1 || i.y0 > i.y1) {
- return boost::optional<Rect> ();
- }
-
- return boost::optional<Rect> (i);
-}
-
-Rect
-Rect::translate (Duple t) const
-{
- Rect r;
-
- r.x0 = safe_add (x0, t.x);
- r.y0 = safe_add (y0, t.y);
- r.x1 = safe_add (x1, t.x);
- r.y1 = safe_add (y1, t.y);
- return r;
-}
-
-Rect
-Rect::extend (Rect const & o) const
-{
- Rect r;
- r.x0 = min (x0, o.x0);
- r.y0 = min (y0, o.y0);
- r.x1 = max (x1, o.x1);
- r.y1 = max (y1, o.y1);
- return r;
-}
-
-Rect
-Rect::expand (Distance amount) const
-{
- Rect r;
- r.x0 = x0 - amount;
- r.y0 = y0 - amount;
- r.x1 = safe_add (x1, amount);
- r.y1 = safe_add (y1, amount);
- return r;
-}
-
-bool
-Rect::contains (Duple point) const
-{
- return point.x >= x0 && point.x <= x1 && point.y >= y0 && point.y <= y1;
-}
-
-Rect
-Rect::fix () const
-{
- Rect r;
-
- r.x0 = min (x0, x1);
- r.y0 = min (y0, y1);
- r.x1 = max (x0, x1);
- r.y1 = max (y0, y1);
-
- return r;
-}
-
-Duple
-ArdourCanvas::operator- (Duple const & o)
-{
- return Duple (-o.x, -o.y);
-}
-
-Duple
-ArdourCanvas::operator+ (Duple const & a, Duple const & b)
-{
- return Duple (safe_add (a.x, b.x), safe_add (a.y, b.y));
-}
-
-bool
-ArdourCanvas::operator== (Duple const & a, Duple const & b)
-{
- return a.x == b.x && a.y == b.y;
-}
-
-Duple
-ArdourCanvas::operator- (Duple const & a, Duple const & b)
-{
- return Duple (a.x - b.x, a.y - b.y);
-}
-
-Duple
-ArdourCanvas::operator/ (Duple const & a, double b)
-{
- return Duple (a.x / b, a.y / b);
-}
-