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Re: [Qemu-devel] [RFC] qemu VGA endian swap low level drawing changes


From: Peter Maydell
Subject: Re: [Qemu-devel] [RFC] qemu VGA endian swap low level drawing changes
Date: Tue, 17 Jun 2014 12:08:32 +0100

On 17 June 2014 11:45, Gerd Hoffmann <address@hidden> wrote:
> Benjamin Herrenschmidt wrote:
>> What do you prefer ?
>
> Let pixman handle it?  Well, except that pixman can't handle byteswapped
> 16bpp formats.  Too bad :(
>
> In any case cleaning up the whole mess is overdue and doing that
> beforehand should simplify the job alot.  For quite some time qemu uses
> 32bpp internally no matter what, so the functions for converting the
> guest's framebuffer into anything but 32bpp should be dead code.

Slight tangent, but is there an example in-tree of a framebuffer
model which uses pixman for the pixel conversion? The -template.h
stuff looks quite ugly, not to mention repetitive across devices,
but I don't really feel confident about trying to update existing
ARM devices (eg the pl110) without a sample to use as inspiration...

thanks
-- PMM



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