Re: [PATCH] File readahead buffering

[Javier Martín]

El mié, 23-07-2008 a las 10:05 +0800, Bean escribió:
> On Wed, Jul 23, 2008 at 3:06 AM, Colin D Bennett <address@hidden> wrote:
> > On Tue, 22 Jul 2008 14:48:31 -0400
> > Pavel Roskin <address@hidden> wrote:
> > However, I have not been able to load any
> > PNG images that I have tried to use. Something about the chunk type not
> > being supported.
> >
> 
> Hi,
> 
> Please upload the png file that cause problem.
> 
> Also note that png use DEFLATE compression. I write a decoder in png,
> which may be a little slow. Perhaps I can import the decoder from
> zlib, if copyright allows.
Does the GRUB decoder distinguish between critical and ancillary chunks?
A decoder finding a critical chunk that it does not understand should
abort, but finding an unknown ancillary chunk is not an error - maybe
his file has an ancillary chunk like zTXt and the GRUB png reader is
rejecting it as having unknown chunks. I didn't even take a look at the
decoder code so I could be dead wrong, but I think it's a possibility
worth investigating...

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