libcamera: geometry: Turn Size and Rectangle into classes

SizeRange is defined as a class while Size and Rectangle are defined as
struct. This is confusing for users in forward declarations. Simplify it
by turning both structures into classes.

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

src/libcamera/pipeline/ipu3/cio2.h

@@ -21,8 +21,8 @@ class CameraSensor;
 class FrameBuffer;
 class MediaDevice;
 class Request;
+class Size;
 class V4L2Subdevice;
-struct Size;
 struct StreamConfiguration;
 
 class CIO2Device

src/libcamera/pipeline/ipu3/imgu.h

@@ -17,7 +17,7 @@ namespace libcamera {
 
 class FrameBuffer;
 class MediaDevice;
-struct Size;
+class Size;
 struct StreamConfiguration;
 
 class ImgUDevice

src/libcamera/pipeline/simple/converter.h

@@ -20,7 +20,7 @@ namespace libcamera {
 
 class FrameBuffer;
 class MediaDevice;
-struct Size;
+class Size;
 class SizeRange;
 struct StreamConfiguration;
 class V4L2M2MDevice;