libcamera: geometry: Add isNull() function to Size class

It's common for code to check if a size is null. Add a helper function
to do so.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Umang Jain <email@uajain.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/libcamera/geometry.h b/include/libcamera/geometry.h
index edda42cf..7d4b8bcf 100644
--- a/include/libcamera/geometry.h
+++ b/include/libcamera/geometry.h
@@ -41,6 +41,7 @@ struct Size {
 	unsigned int width;
 	unsigned int height;
 
+	bool isNull() const { return !width && !height; }
 	const std::string toString() const;
 };