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c:graphics.h:registerbgifont

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c:graphics.h:registerbgifont [2015/05/06 23:06] (current)
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 +===== registerbgifont =====
 +
 +
 +====Syntax of registerbgifont ==== 
 + <code c>
 +#include <graphics.h>
 +int registerbgifont(void (*font)(void));
 +  </code>
 +
 +
 +==== Description of registerbgifont ==== 
 +<code c>
 +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.
 +</code>
 +
 +
 +==== Example of registerbgifont ====
 +<code c>
 +/* 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;
 +}
 +</code>
 +
 +
 +==== See also ====
 +[[graphresult]]
 +[[initgraph]]
 +[[installuserdriver]]
 +[[registerbgidriver]]
 +[[settextstyle]]
 +
 +
 +===== output of registerbgifont example ===== 
 +
 +    no output of example at the moment
 +    do not hesitate and add it...  
 +
 +
  
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c/graphics.h/registerbgifont.txt · Last modified: 2015/05/06 23:06 (external edit)

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