registerbgifont

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Syntax

#include <graphics.h>

int registerbgifont(void (*font)(void));

Description

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.

Return Value

registerbgifont returns a negative graphics error code if the specified font is invalid. Otherwise, registerbgifont returns the font number of the registered font.

Windows Notes

registerbgifont is not available in the winbgim implementation.

See also

graphresult

initgraph

installuserdriver

registerbgidriver

settextstyle

Example

/* 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;

}

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