XDrawLines
Syntax
XDrawLines(display, d, gc, points, npoints, mode)
Display *display;
Drawable d;
GC gc;
XPoint *points;
int npoints;
int mode;
Arguments
| display
| Specifies the connection to the X server.
|
| d
| Specifies the drawable.
|
| gc
| Specifies the GC.
|
| points
| Specifies an array of points.
|
| npoints
| Specifies the number of points in the array.
|
| mode
| Specifies the coordinate mode.
You can pass
CoordModeOrigin
or
CoordModePrevious.
|
Description
The
XDrawLines()
function uses the components of the specified GC to draw
npoints-1 lines between each pair of points (point[i], point[i+1])
in the array of
XPoint
structures.
It draws the lines in the order listed in the array.
The lines join correctly at all intermediate points, and if the first and last
points coincide, the first and last lines also join correctly.
For any given line,
XDrawLines()
does not draw a pixel more than once.
If thin (zero line-width) lines intersect,
the intersecting pixels are drawn multiple times.
If wide lines intersect, the intersecting pixels are drawn only once, as though
the entire
PolyLine
protocol request were a single, filled shape.
CoordModeOrigin
treats all coordinates as relative to the origin,
and
CoordModePrevious
treats all coordinates after the first as relative to the previous point.
XDrawLines()
use these GC components:
function, plane-mask,
line-width,
line-style,
cap-style,
join-style,
fill-style,
subwindow-mode,
clip-x-origin,
clip-y-origin,
and clip-mask.
XDrawLines() also uses these GC mode-dependent components:
foreground,
background,
tile,
stipple,
tile-stipple-x-origin,
tile-stipple-y-origin,
dash-offset,
and
dash-list.
XDrawLine(),
can generate
BadDrawable,
BadGC,
BadMatch
and
BadValue
errors.
Diagnostics
| BadDrawable
| A value for a Drawable argument does not name a
defined Window or Pixmap.
|
| BadGC
| A value for a GContext
argument does not name a defined
GContext.
|
| BadMatch
| An
InputOnly
window is used as a Drawable.
|
| BadMatch
| Some argument or pair of arguments has the correct type and range but fails
to match in some other way required by the request.
|
| BadValue
| Some numeric value falls outside the range of values accepted by the request.
Unless a specific range is specified for an argument, the full range defined
by the argument's type is accepted. Any argument defined as a set of
alternatives can generate this error.
|
See also
XDrawArc(),
XDrawLine(),
XDrawPoint(),
XDrawRectangle(),
XDrawSegments(),
"
Drawing Single and Multiple Lines".
Christophe Tronche, [email protected]
