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

FreeBSD Manual Pages

  
 
  

home | help
vga_drawline(3)		      Svgalib User Manual	       vga_drawline(3)

NAME
       vga_drawline - draw a line on the screen

SYNOPSIS
       #include	<vga.h>

       int vga_drawline(int x1,	int y1,	int x2,	int y2);

DESCRIPTION
       draws  a	 line from (x1,	y1) to (x2, y2)	on the screen. If you exchange
       start and end of	the line you should not	expect the  exactly  identical
       set of pixel be covered by the line.

       This  function  is  very	 inefficient  as  is does a bunch of vga_draw-
       pixel(3)	calls, you should consider using gl_line(3) which is very  ef-
       ficient,	 or doing direct screen	access instead or use vga_drawscanseg-
       ment(3) to handle more than one pixel.

       The color drawn is set with vga_setcolor(3) or vga_setrgbcolor(3) resp.

       The function always returns 0 (on which you should probably not	really
       rely).

SEE ALSO
       svgalib(7),   vgagl(7),	 libvga.config(5),   gl_line(3)	 vga_clear(3),
       vga_setcolor(3),	vga_setrgbcolor(3), vga_getpixel(3),  vga_drawline(3),
       vga_drawscanline(3), vga_drawscansegment(3), vga_getscansegment(3)

AUTHOR
       This  manual page was edited by Michael Weller <eowmob@exp-math.uni-es-
       sen.de>.	The exact source of the	referenced function as well as of  the
       original	 documentation	is unknown.  This Page was modified by Don Se-
       crest <secrest@uiuc.edu>

       It is very likely that both are at least	to some	extent are due to Harm
       Hanemaayer <H.Hanemaayer@inter.nl.net>.

       Occasionally  this  might be wrong. I hereby asked to be	excused	by the
       original	author and will	happily	accept any additions or	corrections to
       this first version of the svgalib manual.

Svgalib	(>= 1.2.11)		21 August 1999		       vga_drawline(3)

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | AUTHOR

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

home | help