Manual pages › X Window and screen libraries (3X)

XFillRect(3X)

fill rectangles, polygons, or arcs

From the original Amiga UNIX 2.1 manual. Some things it mentions may not be in this release.

NAME

XFillRectangle, XFillRectangles, XFillPolygon, XFillArc, XFillArcs - fill rectangles, polygons, or arcs

SYNTAX

XFillRectangle(display, d, gc, x, y, width, height)
      Display *display;
      Drawable d;
      GC gc;
      int x, y;
      unsigned int width, height;

XFillRectangles(display, d, gc, rectangles, nrectangles)
      Display *display;
      Drawable d;
      GC gc;
      XRectangle *rectangles;
      int nrectangles;

XFillPolygon(display, d, gc, points, npoints, shape, mode)
      Display *display;
      Drawable d;
      GC gc;
      XPoint *points;
      int npoints;
      int shape;
      int mode;

XFillArc(display, d, gc,  x, y, width, height, angle1,
angle2)
      Display *display;
      Drawable d;
      GC gc;
      int x, y;
      unsigned int width, height;
      int angle1, angle2;

XFillArcs(display, d, gc, arcs, narcs)
      Display *display;
      Drawable d;
      GC gc;
      XArc *arcs;
      int narcs;

ARGUMENTS

angle1    Specifies the start of the arc relative to the
          three-o'clock position from the center, in units
          of degrees * 64.

angle2 Specifies the path and extent of the arc relative to the start of the arc, in units of degrees * 64.

XWIN 3.0               Last change: 9/1/88                 .ie t

arcs Specifies a pointer to an array of arcs.

d Specifies the drawable.

display Specifies the connection to the XWIN server.

gc Specifies the GC.

mode Specifies the coordinate mode. You can pass Coord-ModeOrigin or CoordModePrevious.

narcs Specifies the number of arcs in the array.

npoints Specifies the number of points in the array.

nrectangles

Specifies the number of rectangles in the array.

points    Specifies a pointer to an array of points.

rectangles

Specifies a pointer to an array of rectangles.

shape     Specifies a shape that helps the server to improve
          performance.  You can pass Complex, Convex, or
          Nonconvex.

width
height    Specify the width and height, which are the dimen-
          sions of the rectangle to be filled or the major
          and minor axes of the arc.

x
y         Specify the x and y coordinates, which are rela-
          tive to the origin of the drawable and specify the
          upper-left corner of the rectangle.

DESCRIPTION

The XFillRectangle and XFillRectangles functions fill the
specified rectangle or rectangles as if a four-point FillPo-
lygon protocol request were specified for each rectangle:
[x,y] [x+width,y] [x+width,y+height] [x,y+height]

Each function uses the x and y coordinates, width and height dimensions, and GC you specify.

     XFillRectangles fills the rectangles in the order listed in
     the array. For any given rectangle, XFillRectangle and
     XFillRectangles do not draw a pixel more than once. If rec-
     tangles intersect, the intersecting pixels are drawn multi-
     ple times.

XWIN 3.0               Last change: 9/1/88                 .ie t

     Both functions use these GC components: function, plane-
     mask, fill-style, subwindow-mode, clip-x-origin, clip-y-
     origin, and clip-mask.  They also use these GC mode-
     dependent components: foreground, background, tile, stipple,
     tile-stipple-x-origin, and tile-stipple-y-origin.

XFillRectangle and XFillRectangles can generate BadDrawable, BadGC, and BadMatch errors.

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.  Coord-
ModeOrigin 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 Complex, the path may self-intersect.

•    If shape is Convex, the path is wholly convex. If known
     by the client, specifying Convex can improve perfor-
     mance. 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.

     For each arc, XFillArc or XFillArcs fills the region closed
     by the infinitely thin path described by the specified arc
     and, depending on the arc-mode specified in the GC, one or
     two line segments. For ArcChord, the single line segment
     joining the endpoints of the arc is used. For ArcPieSlice,
     the two line segments joining the endpoints of the arc with
     the center point are used. XFillArcs fills the arcs in the

XWIN 3.0               Last change: 9/1/88                 .ie t

     order listed in the array. For any given arc, XFillArc and
     XFillArcs do not draw a pixel more than once. If regions
     intersect, the intersecting pixels are drawn multiple times.

     Both functions use these GC components: function, plane-
     mask, fill-style, arc-mode, subwindow-mode, clip-x-origin,
     clip-y-origin, and clip-mask.  They also use these GC mode-
     dependent components: foreground, background, tile, stipple,
     tile-stipple-x-origin, and tile-stipple-y-origin.

XFillArc and XFillArcs can generate BadDrawable, BadGC, and BadMatch errors.

DIAGNOSTICS