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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_drawpixel(3) calls, you should consider using gl_line(3) which is
       very efficient, or doing direct screen access instead or use
       vga_drawscansegment(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-
       essen.de>. The exact source of the referenced function as well as of
       the original documentation is unknown.  This Page was modified by Don
       Secrest <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)

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