gl_printf(3)           Svgalib User Manual           gl_printf(3)

NAME
       gl_printf - write formatted output in graphic mode

SYNOPSIS
       #include <vgagl.h>

       int gl_printf(int x, int y, const char *fmt, ...);

DESCRIPTION
       gl_printf  writes,  like  printf(3)  a formatted string to
       position (x, y) using the currently selected font. If  one
       or  both of x and y is negative, the text printing contin-
       ues at the last position. The special characters  \b,  \r,
       \n, \a, \t and \v have the usual effects.

       Printing   wraps  at  the  screen  borders.  Nevertheless,
       behaviour is undefined if not a single characters fits  on
       the  screen  or  if  the  initial  position is outside the
       screen.

       The kind of text draw operation is set  with  gl_setwrite-
       mode(3).

       BEWARE!   Prior to the of use of gl_printf(3) you must set
       a font.

       A good default initialization sequence is:

       gl_setfont(8, 8, gl_font8x8);
       gl_setwritemode(FONT_COMPRESSED + WRITEMODE_OVERWRITE);
       gl_setfontcolors(0, vga_white());

RETURN VALUE
       The number of characters printed.

BUGS
       For compatibility reasons this function is  not  contained
       in a.out libraries.

SEE ALSO
       printf(3),    svgalib(7),    vgagl(7),    gl_colorfont(3),
       gl_expandfont(3),  gl_font8x8(3),  gl_setfont(3),  gl_set-
       fontcolors(3),       gl_setwritemode(3),      gl_write(3),
       gl_writechar(3), printftest(6).

AUTHOR
       This  function  and  manual  page  was  written  by   Trek
       <trek00@freenet.hut.fi> <trek@mediaservice.net>.

Svgalib 1.3.0              22 Feb 1997                          1