Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help
XSetLineAttributes(3)		XLIB FUNCTIONS		 XSetLineAttributes(3)

NAME
       XSetLineAttributes, XSetDashes -	GC convenience routines

SYNTAX
       int   XSetLineAttributes(Display	  *display,   GC   gc,	 unsigned  int
	      line_width, int line_style, int cap_style, int join_style);

       int XSetDashes(Display *display,	GC gc, int dash_offset,	 _Xconst  char
	      dash_list[], int n);

ARGUMENTS
       cap_style Specifies  the	 line-style  and cap-style you want to set for
		 the  specified	 GC.   You  can	 pass	CapNotLast,   CapButt,
		 CapRound, or CapProjecting.

       dash_list Specifies the dash-list for the dashed	line-style you want to
		 set for the specified GC.

       dash_offset
		 Specifies the phase of	the pattern for	the dashed  line-style
		 you want to set for the specified GC.

       display	 Specifies the connection to the X server.

       gc	 Specifies the GC.

       join_style
		 Specifies  the	line join-style	you want to set	for the	speci-
		 fied GC.  You can pass	JoinMiter, JoinRound, or JoinBevel.

       line_style
		 Specifies the line-style you want to set  for	the  specified
		 GC.   You  can	 pass  LineSolid,  LineOnOffDash,  or LineDou-
		 bleDash.

       line_width
		 Specifies the line-width you want to set  for	the  specified
		 GC.

       n	 Specifies the number of elements in dash_list.

DESCRIPTION
       The XSetLineAttributes function sets the	line drawing components	in the
       specified GC.

       XSetLineAttributes can generate BadAlloc, BadGC,	and BadValue errors.

       The XSetDashes function sets the	dash-offset and	 dash-list  attributes
       for dashed line styles in the specified GC.  There must be at least one
       element in the specified	dash_list, or a	BadValue error	results.   The
       initial	and  alternating  elements  (second, fourth, and so on)	of the
       dash_list are the even dashes, and the others are the odd dashes.  Each
       element specifies a dash	length in pixels.  All of the elements must be
       nonzero,	or a BadValue error results.  Specifying an odd-length list is
       equivalent to specifying	the same list concatenated with	itself to pro-
       duce an even-length list.

       The dash-offset defines the phase of the	pattern, specifying  how  many
       pixels into the dash-list the pattern should actually begin in any sin-
       gle graphics request.  Dashing is continuous through path elements com-
       bined  with  a  join-style but is reset to the dash-offset between each
       sequence	of joined lines.

       The unit	of measure for dashes is the same for the ordinary  coordinate
       system.	 Ideally,  a  dash  length  is measured	along the slope	of the
       line, but implementations are only required to  match  this  ideal  for
       horizontal and vertical lines.  Failing the ideal semantics, it is sug-
       gested that the length be measured along	the major axis	of  the	 line.
       The  major axis is defined as the x axis	for lines drawn	at an angle of
       between -45 and +45 degrees or between 135 and 225 degrees from	the  x
       axis.  For all other lines, the major axis is the y axis.

       XSetDashes can generate BadAlloc, BadGC,	and BadValue errors.

DIAGNOSTICS
       BadAlloc	 The  server  failed  to  allocate  the	 requested resource or
		 server	memory.

       BadGC	 A value for a GContext	argument does not name a defined GCon-
		 text.

       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
       XCreateGC(3),   XQueryBestSize(3),  XSetArcMode(3),  XSetClipOrigin(3),
       XSetFillStyle(3), XSetFont(3), XSetState(3), XSetTile(3)
       Xlib - C	Language X Interface

X Version 11			 libX11	1.6.12		 XSetLineAttributes(3)

NAME | SYNTAX | ARGUMENTS | DESCRIPTION | DIAGNOSTICS | SEE ALSO

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=XSetLineAttributes&sektion=3&manpath=FreeBSD+12.2-RELEASE+and+Ports>

home | help