Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!seismo!rutgers!cbmvax!carolyn
From: carolyn@cbmvax.cbm.UUCP (Carolyn Scheppner)
Newsgroups: comp.sys.amiga
Subject: Re: Need help with .info files
Message-ID: <1260@cbmvax.cbmvax.cbm.UUCP>
Date: Tue, 20-Jan-87 17:44:48 EST
Article-I.D.: cbmvax.1260
Posted: Tue Jan 20 17:44:48 1987
Date-Received: Wed, 21-Jan-87 04:01:17 EST
References: <2269@jade.BERKELEY.EDU>
Reply-To: carolyn@cbmvax.UUCP (Carolyn Scheppner)
Organization: Commodore Technology, West Chester, PA
Lines: 73

In article <2269@jade.BERKELEY.EDU> spencer@eris.BERKELEY.EDU () writes:
>Well, perhaps I am behind the times, but I don't know where to go in the 
>manuals to find information on the .info file structure.  I don't know
>what is wrong with me, I just don't ever remember coming across it.  I 
>am trying to read the icon files and display their graphic on my own screen.

   See the "Workbench" chapter of the Rom Kernel manual.  It describes
.info's.  I was originally apprehensive about working with them but
it was all MUCH easier than I thought it would be.

   Basically...

...
#include <exec/types.h>
#include <workbench/workbench.h>
...
ULONG  IconBase = NULL;
struct DiskObject *obj;
...
main()
   {
   char *filename;
   ...
   if(!(IconBase=OpenLibrary("icon.library",0)))  yourabort();

   filename = "whatever";   /* name of file minus '.info' */

   if(!(obj=(struct DiskObject *)GetDiskObject(filename)))  yourabort();

   /* If successful, GetDiskObject() has allocated a struct DiskObject
    * and filled it in from the .info file.  See workbench.h for a
    * description of the DiskObject structure.  The DiskObject structure
    * contains a whole embedded Gadget structure.  The GadgetRender
    * field of the Gadget points to the Image structure for the icon.
    * The really nice thing is how simple it is to modify DiskObjects.
    * All you have to do is use the obj pointer returned by GetDiskObject()
    * to modify the pointers, flags etc. in the structure.  Then use
    * PutDiskObject(filename,obj) to write out the .info.  Filename
    * can be the same name, or the name of a different file you wish
    * to create an icon for.  The magic part is that PutDiskObject()
    * grabs all of the things pointed to by the DiskObject structure
    * and drags them along into the .info file.  This is how I did
    * IconMerge (1.2 Extras disk).  I just Get two DiskObjects,
    * put the GadgetRender pointer of the second in the SelectRender
    * field of the first, replace any existing highlighting flags
    * for the first with GADGHIMAGE, and Put the first one back out
    * under a new name.  Then FreeDiskObject(obj) the original two.
    */

   ... /* do your stuff, PutDiskObject(filename,obj) if you wish */

   cleanup()
   }

yourabort()
   {
   cleanup();
   exit(0);
   }

cleanup()
   {   
   if(obj) FreeDiskObject(obj);
   if(IconBase) CloseLibrary(IconBase);
   ...
   }

-- 
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Carolyn Scheppner -- CBM   >>Amiga Technical Support<<
                     UUCP  ...{allegra,caip,ihnp4,seismo}!cbmvax!carolyn 
                     PHONE 215-431-9180
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=