From: ZeppinHood <zeppinhood@badsector.com>
Subject: Re: Very Large Bitmap Experiment
Date: 24 Jun 1999 00:00:00 GMT
Message-ID: <3771D376.2DD5@badsector.com>
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Earl F. Glynn wrote:
>
> In recent weeks several posts in the newsgroups were about
> problems caused by fearless programmers creating bitmaps
> of unusually large dimensions.
>
> To quantify the size of the largest "legal" bitmap -- a compound
> limitation of the video adapter, Windows, and who knows what
> else --  I developed a program that can be used to manually
> find the largest pf24bit that can be created on a given machine.


Why not just read the microsoft article that explains
the limitation and live with it? I'm sure you have read
some of my posts that sum it up as:

1) Don't create DDB's that are larger than the screen.

2) Don't create/blt DDB's from a DIB, were the memory
consumption of the source rectangle exceeds the memory
consumption of the screen.

3) Get around the above limitation by

a) to make large DDB;s, tile screen sized bitmaps.

b) Instead of using functions like CreateDIBitmap(),
make the bitmap(s) and blt the DIB.

c) Blt DIB's in screen_sized or smaller chunks
being carefull not to exceed screen memory requirments.


Joe [please practice safe blts]
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