trusty (3) gl_printf.3.gz

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 continues 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_setwritemode(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_setfontcolors(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>.