change
Changes the dash pattern to be used by stroke. A dash pattern is specified by dashes. 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_LINE_CAP_ROUND, or CAIRO_LINE_CAP_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 changeDash. If dashes is empty then dashing is disabled, however if dashes only contains a single element then 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 Canvas will be put into an error state with a status of CAIRO_STATUS_INVALID_DASH.
Parameters
An array specifying alternate lengths of on, and off stroke portions.
An offset into the dash pattern at which the stroke should start.
Parameters
An array specifying alternate lengths of on, and off stroke portions.
An offset into the dash pattern at which the stroke should start.
Parameters
An array specifying alternate lengths of on, and off stroke portions.
An offset into the dash pattern at which the stroke should start.