Xref: news2.mv.net comp.os.msdos.djgpp:5004
From: Ben Ashley <Ben AT flag DOT demon DOT co DOT uk>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: A few more DJGPP Questions...
Date: Fri, 14 Jun 96 20:21:50 GMT
Organization: Flag Bearers
Lines: 55
Message-ID: <834783710snz@flag.demon.co.uk>
References: <Pine DOT SGI DOT 3 DOT 91 DOT 960614152746 DOT 20838C-100000 AT tower DOT york DOT ac DOT uk>
Reply-To: Ben AT flag DOT demon DOT co DOT uk
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

In article <Pine DOT SGI DOT 3 DOT 91 DOT 960614152746 DOT 20838C-100000 AT tower DOT york DOT ac DOT uk>
           slh100 AT york DOT ac DOT uk "Shawn Hargreaves" writes:

> On Fri, 14 Jun 1996, Ben Ashley wrote:
> 
> > problems there.  Does allegro use the wonderful DJGPP memory management? 
> > 
> > Rhide told me my memory situation was '8M / 6M'.  Does this really 
> > mean I can finally write a program which is graphic intensive and may 
> > need to store megabytes of graphic/sound data?  I do hope so...
> 
> Memory management isn't something you have to use as such, it just _is_ :-)
> Forget about segments and 640k limits: however much RAM you have in your 
> machine, that is how much you can use. And if you go on allocating RAM 
> beyond that amount, no problems, virtual memory will be used instead.
> 
> So yes, there is no problem loading up several megs of graphics. Sound data 
> is a bit different becuase it gets locked and can't be swapped out to 
> disk, thus samples can't use virtual memory, but you can fit a lot into 8 
> megs of physical RAM in any case.
> 
> Try malloc(1024*1024*64) sometime, it works great :-)

Great...

Actually, I was gonna Email you about something, but I didn't know if you
were still around :).  Still, I may aswell ask my Email questions here:

I have looked at the docs for allegro.  I am converting a huge set of classes
from VC++, to work in DJGPP, and your allegro system will come in major use
with these application classes...  But I have a few questions:

1.  In my picture boxes, I am going to create a bitmap, with the dimensions of
    the client area of the picture boxes.  Any drawing/writing to this
    control willl therefore go to the bitmap.  Hoe easy is it to copy this
    memory bitmap to screen?  Should I create A sub-bitmap or what?  I only
    want one copy of the picture boxes data, and then whenever the control
    need redrawing, I copy the bitmap data from the bitmap I created in mem
    to the screen.

2.  If the picture box resized, how would I go about resizing the bitmap?
    Do I just put it in a temporary location, delete the old, make a new one
    with the new size, clear it and copy the stored bitmap to the new one?

-- 
Cheers,

Ben                                     -=Look for "Moo-Juice" on the IRC=-

---------------------====### legal notice ###====--------------------------
Microsoft  Network  is prohibited   from  redistributing  this  work in any
form,in whole or in part.   License to distribute this post is available to
Microsoft for $499.  Posting without permission constitutes an agreement to
these terms.