Sets the dash pattern to be used by 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_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 setDash().
If dashes is empty dashing is disabled.
If dashes.length 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_STATUS_INVALID_DASH.
Sets the dash pattern to be used by 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_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 setDash().
If dashes is empty dashing is disabled.
If dashes.length 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_STATUS_INVALID_DASH.