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>.
