1gl_printf(3)                  Svgalib User Manual                 gl_printf(3)
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NAME

6       gl_printf - write formatted output in graphic mode
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SYNOPSIS

10       #include <vgagl.h>
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12       int gl_printf(int x, int y, const char *fmt, ...);
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DESCRIPTION

16       gl_printf  writes, like printf(3) a formatted string to position (x, y)
17       using the currently selected font. If one or both of x and y  is  nega‐
18       tive,  the  text  printing  continues at the last position. The special
19       characters \b, \r, \n, \a, \t and \v have the usual effects.
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21       Printing wraps at the screen borders. Nevertheless, behaviour is  unde‐
22       fined  if  not a single characters fits on the screen or if the initial
23       position is outside the screen.
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25       The kind of text draw operation is set with gl_setwritemode(3).
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27       BEWARE!  Prior to the of use of gl_printf(3) you must set a font.
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29       A good default initialization sequence is:
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31       gl_setfont(8, 8, gl_font8x8);
32       gl_setwritemode(FONT_COMPRESSED + WRITEMODE_OVERWRITE);
33       gl_setfontcolors(0, vga_white());
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RETURN VALUE

37       The number of characters printed.
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BUGS

41       For compatibility reasons this  function  is  not  contained  in  a.out
42       libraries.
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SEE ALSO

46       printf(3),  svgalib(7),  vgagl(7),  gl_colorfont(3),  gl_expandfont(3),
47       gl_font8x8(3), gl_setfont(3), gl_setfontcolors(3),  gl_setwritemode(3),
48       gl_write(3), gl_writechar(3), printftest(6).
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AUTHOR

52       This    function    and    manual    page    was    written   by   Trek
53       <trek00@freenet.hut.fi> <trek@mediaservice.net>.
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57Svgalib 1.3.0                     22 Feb 1997                     gl_printf(3)