From: gradha AT iname DOT com
Newsgroups: comp.os.msdos.djgpp
Subject: Re: putpixel
Date: Fri, 5 May 2000 00:05:13 +0200
Organization: Telefonica Transmision de Datos
Lines: 13
Message-ID: <p6sse8.h05.ln@pedos.es>
References: <20000504103111 DOT 10456 DOT 00001267 AT ng-bh1 DOT aol DOT com>
NNTP-Posting-Host: infon220.jet.es
User-Agent: tin/pre-1.4-981002 ("Phobia") (UNIX) (Linux/2.2.12 (i686))
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

Buffalo276 <buffalo276 AT aol DOT com> wrote:
> Hy,

>   if(!set_gfx_mode(GFX_AUTODETECT,640,480,0,0)) //nearly all systems support
>     { printf("error entering gfx mode!"); //break on error
>       return(-1);
>      } 

That's wrong, allegro returns 0 when it sets the mode, negative if failed, so
your if statement is wrong, you whould write it without '!'.

 Grzegorz Adam Hankiewicz   gradha AT iname DOT com - http://gradha.infierno.org
 Other web pages:  http://glub.ehu.es/  -  http://welcome.to/gogosoftware/