From: Denis Oliver Kropp <dok@directfb.org>
To: James Simmons <jsimmons@transvirtual.com>
Cc: Denis Oliver Kropp <dok@directfb.org>,
Russell King <rmk@arm.linux.org.uk>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] [2.5.21] CyberPro 32bit support and other fixes
Date: Sat, 15 Jun 2002 12:55:47 +0200 [thread overview]
Message-ID: <20020615105547.GA22186@skunk.convergence.de> (raw)
In-Reply-To: <20020613092323.GA2384@skunk.convergence.de> <Pine.LNX.4.44.0206141550000.21575-100000@www.transvirtual.com>
Quoting James Simmons (jsimmons@transvirtual.com):
>
> > Why is the pseudo palette used anyway?
>
> Its a fast way for the console to grab the proper console index color to
> draw to the framebuffer. Otherwise we have to regenerate the color all the
> time. Plus it is always endian code for us :-)
I didn't mean the array of colors for the console, but the usage of
the hardware palette for modes != 8 bit.
> > There's no speed benefit and
> > applications running in true/direct color would look wrong.
>
> For userland no but for the kernel we do have a benifiet.
There's no speed benefit if you write "index|index|index" into the
framebuffer instead of "red|green|blue".
--
Best regards,
Denis Oliver Kropp
.------------------------------------------.
| DirectFB - Hardware accelerated graphics |
| http://www.directfb.org/ |
"------------------------------------------"
Convergence GmbH
next prev parent reply other threads:[~2002-06-15 10:56 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-06-13 8:32 [PATCH] [2.5.21] CyberPro 32bit support and other fixes Denis Oliver Kropp
2002-06-13 9:09 ` Russell King
2002-06-13 9:23 ` Denis Oliver Kropp
2002-06-14 22:53 ` James Simmons
2002-06-15 10:55 ` Denis Oliver Kropp [this message]
2002-06-15 12:30 ` Russell King
2002-06-15 14:03 ` Denis Oliver Kropp
2002-06-28 13:03 ` Geert Uytterhoeven
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