A graphics port.

A real number.

A real number.

A real number.

A real number.

A real number.

A real number.

graphics-state parameters passed as keyword arguments.

A boolean.

The function `draw-arc`

draws an arc contained in the rectangle from (`
x y`
) to (`
x+width y+height`
) from `
start-angle`
to `
start-angle+sweep-angle`
. Both angles are specified in radians. Currently, arcs are parts of ellipses whose major and minor axes are parallel to the screen axes. When `
port`
's `
drawing-mode`
is `:quality`

the arc is transformed properly, but if `
drawing-mode`
is `:compatible`

and `
port`
has rotation in its transform, the enclosing rectangle is modified to be the external enclosing orthogonal rectangle of the rotated rectangle. The start angle is rotated. The `
transform, foreground, background, operation, pattern, thickness, scale-thickness`
, `
mask`
, `
shape-mode`
and `
compositing-mode`
from the `
port`
's graphics-state are all used, unless overridden in `
args`
. Additionally on X11/Motif only, `
stipple`
is used. When `
filled`
is non-nil, a sector is drawn.

*CAPI User Guide and Reference Manual (Unix version) - 25 Feb 2015*