getmoderange

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Syntax

#include <graphics.h>

void getmoderange(int graphdriver, int *lomode, int *himode);

Description

getmoderange gets the range of valid graphics modes for the given graphics driver, graphdriver. The lowest permissible mode value is returned in *lomode, and the highest permissible value is *himode. If graphdriver specifies an invalid graphics driver, both *lomode and *himode are set to -1. If the value of graphdriver is -1, the currently loaded driver modes are given.

Return Value

None.

See also

getgraphmode

getmaxmode

getmodename

initgraph

setgraphmode

Example

/* getmoderange 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;

   int low, high;

   char mrange[80];



   /* 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;



   /* get the mode range for this driver */

   getmoderange(gdriver, &low, &high);



   /* convert mode range info. into strings */

   sprintf(mrange, "This driver supports modes %d..%d", low, high);



   /* display the information */

   settextjustify(CENTER_TEXT, CENTER_TEXT);

   outtextxy(midx, midy, mrange);





   /* clean up */

   getch();

   closegraph();

   return 0;

}

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