XFillPolygon
Syntax
XFillPolygon(display, d, gc, points, npoints, shape, mode)
Display *display;
Drawable d;
GC gc;
XPoint *points;
int npoints;
int shape;
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.
|
| shape
| Specifies a shape that helps the server to improve performance.
You can pass
Complex,
Convex,
or
Nonconvex.
|
| mode
| Specifies the coordinate mode.
You can pass
CoordModeOrigin
or
CoordModePrevious.
|
Description
XFillPolygon()
fills the region closed by the specified path.
The path is closed
automatically if the last point in the list does not coincide with the
first point.
XFillPolygon()
does not draw a pixel of the region more than once.
CoordModeOrigin
treats all coordinates as relative to the origin,
and
CoordModePrevious
treats all coordinates after the first as relative to the previous point.
Depending on the specified shape, the following occurs:
-
If shape is
.PN Complex ,
the path may self-intersect.
Note that contiguous coincident points in the path are not treated
as self-intersection.
-
If shape is
Convex ,
for every pair of points inside the polygon,
the line segment connecting them does not intersect the path.
If known by the client,
specifying
Convex
can improve performance.
If you specify
Convex
for a path that is not convex,
the graphics results are undefined.
-
If shape is
Nonconvex ,
the path does not self-intersect, but the shape is not
wholly convex.
If known by the client,
specifying
Nonconvex
instead of
Complex
may improve performance.
If you specify
Nonconvex
for a self-intersecting path, the graphics results are undefined.
The fill-rule of the GC controls the filling behavior of
self-intersecting polygons.
This function uses these GC components:
function,
plane-mask,
fill-style,
fill-rule,
subwindow-mode,
clip-x-origin,
clip-y-origin,
and
clip-mask.
It also uses these GC mode-dependent components:
foreground,
background,
tile,
stipple,
tile-stipple-x-origin,
and
tile-stipple-y-origin.
XFillPolygon()
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(),
XDrawPoint(),
XDrawRectangle()
XFillArc(),
XFillArcs(),
XFillRectangle(),
XFillRectangles(),
"
Filling a Single Polygon".
Christophe Tronche, [email protected]
