XFillArcs()XFillArcs()NameXFillArcs – fill multiple arcs.
Synopsis
XFillArcs(display, drawable, gc, arcs, narcs)
Display *display;
Drawable drawable;
GC gc;
XArc *arcs;
int narcs;
Arguments
display Specifies a connection to an X server; returned from XOpenDis‐
play().
drawable
Specifies the drawable.
gc Specifies the graphics context.
arcs Specifies a pointer to an array of arc definitions.
narcs Specifies the number of arcs in the array.
Description
For each arc, XFillArcs() fills the region closed by the specified arc
and one or two line segments, depending on the arc_mode specified in
the GC. It does not draw the complete outlines of the arcs, but some
pixels may overlap.
The arc forms one boundary of the area to be filled. The other bound‐
ary is determined by the arc_mode in the GC. If the arc_mode in the GC
is ArcChord, the single line segment joining the endpoints of the arc
is used. If ArcPieSlice, the two line segments joining the endpoints
of the arc with the center point are used. The arcs are filled in the
order listed in the array. For any given arc, no pixel is drawn more
than once. If filled arcs intersect, pixels will be drawn multiple
times.
In R4 and earlier there is a limit to the number of rectangles that can
be drawn in a single call, based on the maximum request size, which
varies according to the server. In R5, Xlib chops your call into as
many protocol requests as required. To determine how many rectangles
you can draw in a single call in R4, you find out your server's maximum
request size using XMaxRequestSize(). Subtract three and divide by
three, and this is the maximum number of arcs you can fill in a single
XFillArcs() call.
XFillArcs() use these graphics context components: function,
plane_mask, fill_style, arc_mode, subwindow_mode, clip_x_origin,
clip_y_origin, and clip_mask. This function also uses these graphics
context mode-dependent components: foreground, background, tile, stip‐
ple, ts_x_origin, and ts_y_
origin.
For more information, see Volume One, Chapter 6, Drawing Graphics and
Text, and Chapter 5, The Graphics Context.
Structures
typedef struct {
short x, y;
unsigned short width, height;
short angle1, angle2; /* 64ths of Degrees */
} XArc;
Errors
BadDrawable
BadGC
BadMatch
See AlsoXClearArea(), XClearWindow(), XCopyArea(), XCopyPlane(), XDraw,
XDrawArc(), XDrawArcs(), XDrawFilled(), XDrawLine(), XDrawLines(),
XDrawPoint(), XDrawPoints(), XDrawRectangle(), XDrawRectangles(),
XDrawSegments(), XFillArc(), XFillPolygon(), XFillRectangle(), XFill‐
Rectangles().
Xlib - Drawing Primitives XFillArcs()
