getmoderange

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;
}