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Date: Fri, 2 Jun 2006 10:36:04 +0200
From: Ondrej Zajicek <santiago@mail.cz>
To: "Antonino A. Daplas" <adaplas@gmail.com>
Cc: David Lang <dlang@digitalinsight.com>, Jon Smirl <jonsmirl@gmail.com>,
       Dave Airlie <airlied@gmail.com>, "D. Hazelton" <dhazelton@enter.net>,
       Pavel Machek <pavel@ucw.cz>, Alan Cox <alan@lxorguk.ukuu.org.uk>,
       Kyle Moffett <mrmacman_g4@mac.com>,
       Manu Abraham <abraham.manu@gmail.com>, linux cbon <linuxcbon@yahoo.fr>,
       Helge Hafting <helge.hafting@aitel.hist.no>, Valdis.Kletnieks@vt.edu,
       linux-kernel@vger.kernel.org
Subject: Re: OpenGL-based framebuffer concepts
Message-ID: <20060602083604.GA2480@localhost.localdomain>
References: <20060519224056.37429.qmail@web26611.mail.ukl.yahoo.com> <200605272245.22320.dhazelton@enter.net> <9e4733910605272027o7b59ea5n5d402dabdd7167cb@mail.gmail.com> <200605280112.01639.dhazelton@enter.net> <21d7e9970605281613y3c44095bu116a84a66f5ba1d7@mail.gmail.com> <9e4733910605281759j2e7bebe1h6e3f2bf1bdc3fc50@mail.gmail.com> <Pine.LNX.4.63.0605301033330.4786@qynat.qvtvafvgr.pbz> <447CBEC5.1080602@gmail.com>
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On Wed, May 31, 2006 at 05:53:09AM +0800, Antonino A. Daplas wrote:
> David Lang wrote:
> > On Sun, 28 May 2006, Jon Smirl wrote:
> So even a dumb driver such as vesafb that has to do on the fly
> color conversions while pushing 64x more data to the bus can be
> faster than vgacon.

I just implemented text mode switch and tileblit ops into viafb
(http://davesdomain.org.uk/viafb/index.php) and it is about four
times faster than accelerated graphics mode and about eight times
faster than unaccelerated graphics mode (both measured using cat
largefile with ypan disabled). So textmode is meaningful
alternative.

-- 
Elen sila lumenn' omentielvo

Ondrej 'SanTiago' Zajicek (email: santiago@mail.cz, jabber: santiago@njs.netlab.cz)
OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net)
"To err is human -- to blame it on a computer is even more so."