cairoStroke {RGtk2} | R Documentation |
A drawing operator that strokes the current path according to the
current line width, line join, line cap, and dash settings. After
cairo_stroke, the current path will be cleared from the cairo
context. See cairoSetLineWidth
, cairoSetLineJoin
,
cairoSetLineCap
, cairoSetDash
, and
cairoStrokePreserve
.
cairoStroke(cr)
|
[Cairo ] a cairo context |
Note: Degenerate segments and sub-paths are treated specially and provide a useful result. These can result in two different situations:
1. Zero-length "on" segments set in cairoSetDash
. If the cap
style is CAIRO_LINE_CAP_ROUND or CAIRO_LINE_CAP_SQUARE then these
segments will be drawn as circular dots or squares respectively. In
the case of CAIRO_LINE_CAP_SQUARE, the orientation of the squares
is determined by the direction of the underlying path.
2. A sub-path created by cairoMoveTo
followed by either a
cairoClosePath
or one or more calls to cairoLineTo
to the
same coordinate as the cairoMoveTo
. If the cap style is
CAIRO_LINE_CAP_ROUND then these sub-paths will be drawn as circular
dots. Note that in the case of CAIRO_LINE_CAP_SQUARE a degenerate
sub-path will not be drawn at all, (since the correct orientation
is indeterminate).
In no case will a cap style of CAIRO_LINE_CAP_BUTT cause anything to be drawn in the case of either degenerate segments or sub-paths.
Derived by RGtkGen from GTK+ documentation