libcamera: geometry: Add operator<< for classes in geometry

Add operator<< for geometry classes for easier logging.

Signed-off-by: Han-Lin Chen <hanlinchen@chromium.org>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

include/libcamera/geometry.h

@@ -46,6 +46,8 @@ static inline bool operator!=(const Point &lhs, const Point &rhs)
 	return !(lhs == rhs);
 }
 
+std::ostream &operator<<(std::ostream &out, const Point &p);
+
 class Size
 {
 public:
@@ -192,6 +194,8 @@ static inline bool operator>=(const Size &lhs, const Size &rhs)
 	return !(lhs < rhs);
 }
 
+std::ostream &operator<<(std::ostream &out, const Size &s);
+
 class SizeRange
 {
 public:
@@ -232,6 +236,8 @@ static inline bool operator!=(const SizeRange &lhs, const SizeRange &rhs)
 	return !(lhs == rhs);
 }
 
+std::ostream &operator<<(std::ostream &out, const SizeRange &sr);
+
 class Rectangle
 {
 public:
@@ -291,4 +297,6 @@ static inline bool operator!=(const Rectangle &lhs, const Rectangle &rhs)
 	return !(lhs == rhs);
 }
 
+std::ostream &operator<<(std::ostream &out, const Rectangle &r);
+
 } /* namespace libcamera */