[AL] acquire_bitmap()

[Damian Y. <d_y...@ho...>]

Under Allegro 3.925 for Windows in MSVC, which bitmaps
should be acquired manually for best performance?
Just the screen? Just the one(s) I'm blitting to?
Or every bitmap I'm working with at the moment?


Damian Yerrick
http://yerricde.tripod.com/ <- pinocchio's brother
>From <all...@ca...> Fri Oct 29 21:21:36 1999
Received: from mailoff.mtu.edu [141.219.70.5] by canvaslink.com with ESMTP
  (SMTPD32-4.06) id A81E1840162; Fri, 29 Oct 1999 21:21:34 -0400
Received: from mtu.edu (ro...@mt... [141.219.70.1])
	by mailoff.mtu.edu (8.9.3/8.9.3) with ESMTP id VAA15639
	for <al...@ca...>; Fri, 29 Oct 1999 21:20:24 -0400 (EDT)
Received: from cslserver.csl.mtu.edu (cslserver.csl.mtu.edu [141.219.150.71])
	by mtu.edu (8.8.8/8.8.8) with ESMTP id VAA17047
	for <al...@ca...>; Fri, 29 Oct 1999 21:20:24 -0400 (EDT)
Received: from highlander (highlander.resnet.mtu.edu [141.219.82.198])
	by cslserver.csl.mtu.edu (8.8.7/8.8.7/mtumailer-1.2) with SMTP id VAA10106
	for <al...@ca...>; Fri, 29 Oct 1999 21:20:23 -0400 (EDT)
X-Authentication-Warning: cslserver.csl.mtu.edu: Host highlander.resnet.mtu.edu [141.219.82.198] claimed to be highlander
From: "James Johnson" <jtj...@mt...>
To: <al...@ca...>
Subject: RE: [AL] acquire_bitmap()
Date: Fri, 29 Oct 1999 21:17:17 -0400
Message-ID: <NDB...@mt...>
MIME-Version: 1.0
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
X-Priority: 3 (Normal)
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0)
X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2615.200
Importance: Normal
In-Reply-To: <199...@ho...>
Precedence: bulk
Sender: all...@ca...
Reply-To: al...@ca...
X-UIDL: 927489938
Status: O
Content-Length: 977
Lines: 31

You should acquire/release only video bitmaps.  I don't know what happens if
you try acquiring regular bitmaps (in system memory) though.

If you are using a double buffer, then just the screen needs to be acquired.
Else it'll be when you want to access a video bitmap (created with the
create_video_bitmap function, IIRC).

* James Johnson
--
http://snap.to/fusion
"The best way to accelerate an iMac is at 9.8m/sec/sec."

        - Marcus Dolengo

> -----Original Message-----
> From: all...@ca...
> [mailto:all...@ca...]On Behalf Of Damian Yerrick
> Sent: Friday, October 29, 1999 8:48 PM
> To: al...@ca...
> Subject: [AL] acquire_bitmap()
>
>
> Under Allegro 3.925 for Windows in MSVC, which bitmaps
> should be acquired manually for best performance?
> Just the screen? Just the one(s) I'm blitting to?
> Or every bitmap I'm working with at the moment?
>
>
> Damian Yerrick
> http://yerricde.tripod.com/ <- pinocchio's brother
>