EGAVGA.bgi right in front of my computer's nose!

FeebleWizard · #1 30-Nov-2004, 19:17

Hello, I need help using graphics. I have Borland Turbo C++ 3.0 and whenever I try to use a graphics screen, I get the error, “Device driver file not found (EGAVGA.bgi).” The file egavga.big exists in the BGI folder, but the computer will not read it. I placed a copy of egavga.bgi into each of the zipped-up folders, but I still can not use graphics, even after I reinstalled the Turbo C++ 3.0. LOL, I also tried all of the different options under libraries etc. The directories section looked like it might be important in this puzzle, but I was unable to figure anything out. Finally, I tried using Google to investigate this problem, but could not come to a solution. Somehow, it seems that a mysterious program called “BGIOBJ.exe” residing in the BGI folder may be somehow connected to this strange problem in some way I do not understand; however, I am not too sure. I keep double-clicking on it but it just turns the screen black for a second. Maybe it is supposed to be triggered while the program is still running. Does anyone here know much about these sorts of things? Any help would be greatly appreciated!

WaltP · #2 01-Dec-2004, 00:47

Are you using calls to registerbgidriver() and/or initgraph()?

It's really hard to tell what might be wrong with knowing what you're doing.

Jags · #3 01-Dec-2004, 13:37

Quote:

Originally Posted by FeebleWizard

Hello, I need help using graphics. I have Borland Turbo C++ 3.0 and whenever I try to use a graphics screen, I get the error, “Device driver file not found (EGAVGA.bgi).” The file egavga.big exists in the BGI folder, but the computer will not read it. I placed a copy of egavga.bgi into each of the zipped-up folders, but I still can not use graphics, even after I reinstalled the Turbo C++ 3.0. LOL, I also tried all of the different options under libraries etc. The directories section looked like it might be important in this puzzle, but I was unable to figure anything out. Finally, I tried using Google to investigate this problem, but could not come to a solution. Somehow, it seems that a mysterious program called “BGIOBJ.exe” residing in the BGI folder may be somehow connected to this strange problem in some way I do not understand; however, I am not too sure. I keep double-clicking on it but it just turns the screen black for a second. Maybe it is supposed to be triggered while the program is still running. Does anyone here know much about these sorts of things? Any help would be greatly appreciated!

i will be much easier to solve your problem if you can post the code

FeebleWizard · #4 01-Dec-2004, 16:05

Thank you for your replies. Sorry, I should have included the code. I just copied examples from the Borland "Help" files, and nothing would work. Since everything had the same problem, I just thought that it must be that the file were not right, but I was probably wrong about that. Here is the program to demonstrate the rectangle function.

CPP / C++ / C Code:

#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>

int main(void)
{
   /* request auto detection */
   int gdriver = DETECT, gmode, errorcode;
   int left, top, right, bottom;

   /* 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 */
   }

   left = getmaxx() / 2 - 50;
   top = getmaxy() / 2 - 50;
   right = getmaxx() / 2 + 50;
   bottom = getmaxy() / 2 + 50;

   /* draw a rectangle */
   rectangle(left,top,right,bottom);

   /* clean up */
   getch();
   closegraph();
   return 0;
}

I'm new to C++ so I am trying use examples to learn the language. I used to use Pascal, but I quit because got stuck with an error very similar to this when I got a newer computer. I thought it was because Pascal was too ancient of a language, so I switched to C++.

....

Wow... I just figured this out myself again! I couldn't copy the program from the environment so I looked for it in its folder. But this was actually the installation folder. I could not find my file, so I used the Search. In this way I figured out that the real folder was under the C drive in the folder explorer. So I put the EGAVGA.bgi into the BIN folder, because I knew that that is where my program was, and now the graphics work!

Sorry I didn't realize this earlier, but thank you for your help. Between Pascal and very recently C++ this problem has dooged me for years!

....

Now I've tried to take the compiled 'exe' file out of its folder, and I got the same problem again. But a made a new folder and put a copy of the EXE in it along with a copy of EGAEVA.bgi, and now it works again. So this means that the files all have to be put in a file together to work!

This kind of stuff probably sounds silly because it is just common sense, but I just figured all of this out right now while writing this post, and I think I now understand a lot more about how computer programs work.

Thanks again for responding. Hopefully anyone who has this same problem (if anybody else is really that silly) will be helped by this post?

WaltP · #5 01-Dec-2004, 20:15

It's been a while, but I looked at some of my older programs and I noticed I used:

CPP / C++ / C Code:

initgraph(&gdriver, &gmode, "pathname-of-bgi-file");

Another way I've used it is convert the .bgi file to a .obj file (there's a Borland utility to do that) and compile it directly into the program. Look at the help to see if this gets you anywhere.

Jags · #6 02-Dec-2004, 09:01

change this line in your code:-

Quote:

initgraph(&gdriver, &gmode, "");

with this one:-

Quote:

initgraph(&gdriver, &gmode, "c:\\tc\\bgi");

where "c:\\tc\\bgi" is the pathname of your bgi-folder

remember DO NOT use single back-slash in pathname

you can replace the back-slash with a SINGLE forward slash

FeebleWizard · #7 02-Dec-2004, 11:59

Thank you both very much. Doing that does work! My problem was that when I used "" it made the computer look into the BIN folder, I think. I had earlier tried replacing it with "C:\TP\BGI" but of course that did not work. Another entirely different way of solving this problem that I recently discovered was to just take the EGAVGA.bgi and put it right into the BIN file, but I'm glad that I now know the proper way to write a path! Thanks again!

WaltP · #8 02-Dec-2004, 23:07

Quote:

Originally Posted by Jags

change this line in your code:-

CPP / C++ / C Code:

initgraph(&gdriver, &gmode, "");

with this one:-

CPP / C++ / C Code:

initgraph(&gdriver, &gmode, "c:\\tc\\bgi");

where "c:\\tc\\bgi" is the pathname of your bgi-folder

remember DO NOT use single back-slash in pathname

you can replace the back-slash with a SINGLE forward slash

Isn't that what I said? ;-)

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