Date: Mon, 8 Sep 1997 07:51:41 +0800 (GMT)
From: Orlando Andico <orly AT dilnet DOT upd DOT edu DOT ph>
To: ChrHenz <chrhenz AT aol DOT com>
cc: djgpp AT delorie DOT com
Subject: Re: Glitch-free scrolling under Win95?
In-Reply-To: <19970902211001.RAA15270@ladder01.news.aol.com>
Message-ID: <Pine.SGI.3.93.970908075024.1721A-100000@gibson>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Precedence: bulk

On 2 Sep 1997, ChrHenz wrote:

> On the Amiga, scrolling, sprites and stuff like that was done by special
> hardware (blitter chip etc.). Thats why it was all so smooth. On a IBM
> using Mode-X graphics, scrolling should be smooth as well, even if running
> in a dos-box (at least the Allegro V2.2 demos run smooth on my win95 p133).
> Generally you can't expect the performance of hardware graphics chips from
> that slow VGA card, but on the other hand, you're hardly restricted in the
> size/number of sprites etc. when using a software solution as Mode-X sprite
> routines.

Uhm.. I'm using a (fairly antiquated) Cirrus 5428 video card, and it HAS
hardware BitBLT support, linedrawing, etc. IBM started it with the 8514/A
card, which had a hardware Bresenham line algorithm. I'm sure all the
current generation of cards have hardware BitBLT support, and Windows is
almost sure to support this.

-------------------------------------------------------------------
Orlando Alcantara Andico
WWW:   http://www2.mozcom.com/~orly/         Email: orly AT mozcom DOT com
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