Calling registerbgifont informs the graphics system that the font pointed
to by font was included at link time. This routine checks the linked-in
code for the specified font; if the code is valid, it registers the code
in internal tables.
By using the name of a linked-in font in a call to registerbgifont, you
also tell the compiler (and linker) to link in the object file with that
public name.
If you register a user-supplied font, you must pass the result of
registerbgifont to settextstyle as the font number to be used.
/* registerbgifont example */
#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
int main(void)
{
/* request autodetection */
int gdriver = DETECT, gmode, errorcode;
int midx, midy;
/* register a font file that was added into GRAPHICS.LIB */
errorcode = registerbgifont(triplex_font);
/* report any registration errors */
if (errorcode < 0) {
printf("Graphics error: %s\n", grapherrormsg(errorcode));
printf("Press any key to halt:");
getch();
exit(1); /* terminate with an error code */
}
/* initialize graphics and local variables */
initgraph(&gdriver, &gmode, "");
/* read result of initialization */
errorcode = graphresult();
if (errorcode != grOk) { /* an error occurred */
printf("Graphics error: %s\n", grapherrormsg(errorcode));
printf("Press any key to halt:");
getch();
exit(1); /* terminate with an error code */
}
midx = getmaxx() / 2;
midy = getmaxy() / 2;
/* select the registered font */
settextstyle(TRIPLEX_FONT, HORIZ_DIR, 4);
/* output some text */
settextjustify(CENTER_TEXT, CENTER_TEXT);
outtextxy(midx, midy, "The TRIPLEX FONT");
/* clean up */
getch();
closegraph();
return 0;
}