OEDrawCurvedRectangle

void OEDrawCurvedRectangle(OEImageBase& image, const OE2DPoint& tl,
                           const OE2DPoint& br, const OEPen& pen,
                           double radius)

Draws a round rectangle with the given pen.

image: The image around which the border is drawn.
tl, br: The position of the top-left and bottom-right corner of the rectangle.
pen: The graphical properties of the border.
radius: The parameter that determines the roundedness of the corners of the rectangle.