(PECL imagick 2.0.0)
ImagickDraw::roundRectangle — Draws a rounded rectangle
$x1
   , float $y1
   , float $x2
   , float $y2
   , float $rx
   , float $ry
   )This function is currently not documented; only its argument list is available.
Draws a rounded rectangle given two coordinates, x & y corner radiuses and using the current stroke, stroke width, and fill settings.
x1
     x coordinate of the top left corner
y1
     y coordinate of the top left corner
x2
     x coordinate of the bottom right
y2
     y coordinate of the bottom right
rx
     x rounding
ry
     y rounding
No value is returned.