public function addCircle($x, $y, $size, $invert = false)
    {
        $northWest = $this->transform->transformPoint($x, $y, $size, $size);
        $this->addCircleNoTransform($northWest->x, $northWest->y, $size, $invert);
    }
public function addCircle($x, $y, $size, $invert = false)
    {
        $northWest = $this->transform->transformPoint($x, $y, $size, $size);
        $this->addCircleNoTransform($northWest->x, $northWest->y, $size, $invert);
    }
public function addCircle ( $ x , $ y , $ size , $ invert = false ) { $ northWest = $ this -> transform -> transformPoint ( $ x , $ y , $ size , $ size ) ; $ this -> addCircleNoTransform ( $ northWest -> x , $ northWest -> y , $ size , $ invert ) ; }
Adds a circle to the image.

@param float $x The x-coordinate of the bounding rectangle
upper-left corner.
@param float $y The y-coordinate of the bounding rectangle
upper-left corner.
@param float $size The size of the bounding rectangle.
@param bool $invert If true the area of the circle will be removed
from the filled area.
Adds a circle to the image .