Context.setDash

void setDash(double[] dashes, double offset)

Sets the dash pattern to be used by [cairo.context.Context.stroke]. A dash pattern is specified by dashes, an array of positive values. Each value provides the length of alternate "on" and "off" portions of the stroke. The offset specifies an offset into the pattern at which the stroke begins.

Each "on" segment will have caps applied as if the segment were a separate sub-path. In particular, it is valid to use an "on" length of 0.0 with [cairo.types.LineCap.Round] or [cairo.types.LineCap.Square] in order to distributed dots or squares along a path.

Note

The length values are in user-space units as evaluated at the

time of stroking. This is not necessarily the same as the user space at the time of [cairo.context.Context.setDash].

If num_dashes is 0 dashing is disabled.

If num_dashes is 1 a symmetric pattern is assumed with alternating on and off portions of the size specified by the single value in dashes.

If any value in dashes is negative, or if all values are 0, then cr will be put into an error state with a status of [cairo.types.Status.InvalidDash].

Parameters

`dashes`	an array specifying alternate lengths of on and off stroke portions
`offset`	an offset into the dash pattern at which the stroke should start