libcamera: geometry: Add Size structure

Add a simple Size structure that contains an image width and height.

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

src/libcamera/geometry.cpp

@@ -105,4 +105,33 @@ const std::string Rectangle::toString() const
  * \brief The maximum image height
  */
 
+/**
+ * \struct Size
+ * \brief Describe a two-dimensional size
+ *
+ * The Size structure defines a two-dimensional size with integer precision.
+ */
+
+/**
+ * \fn Size::Size()
+ * \brief Construct a Size with width and height set to 0
+ */
+
+/**
+ * \fn Size::Size(unsigned int width, unsigned int height)
+ * \brief Construct a Size with given \a width and \a height
+ * \param width The Size width
+ * \param height The Size height
+ */
+
+/**
+ * \var Size::width
+ * \brief The Size width
+ */
+
+/**
+ * \var Size::height
+ * \brief The Size height
+ */
+
 } /* namespace libcamera */

src/libcamera/include/geometry.h

@@ -40,6 +40,21 @@ struct SizeRange {
 	unsigned int maxHeight;
 };
 
+struct Size {
+	Size()
+		: Size(0, 0)
+	{
+	}
+
+	Size(unsigned int w, unsigned int h)
+		: width(w), height(h)
+	{
+	}
+
+	unsigned int width;
+	unsigned int height;
+};
+
 } /* namespace libcamera */
 
 #endif /* __LIBCAMERA_GEOMETRY_H__ */