draw_circle_antialiased Subroutine

public subroutine draw_circle_antialiased(image_data, img_w, img_h, cx, cy, radius, r, g, b, opacity)

Draw filled circle with antialiasing

Renders a filled circle using distance-based antialiasing. Alpha values computed from exact distance to circle boundary. Used primarily for circular markers.

Arguments

Type	Intent	Optional	Attributes		Name
integer(kind=1),	intent(inout)			::	image_data(:)
integer,	intent(in)			::	img_w
integer,	intent(in)			::	img_h
real(kind=wp),	intent(in)			::	cx
real(kind=wp),	intent(in)			::	cy
real(kind=wp),	intent(in)			::	radius	Circle radius in pixels
real(kind=wp),	intent(in)			::	r	Circle radius in pixels
real(kind=wp),	intent(in)			::	g	Circle radius in pixels
real(kind=wp),	intent(in)			::	b	Circle radius in pixels
real(kind=wp),	intent(in)			::	opacity