nanogui: convbmp big-endian bug?
Subject:
RE: [nanogui] convbmp big-endian bug?
From:
alain volmat ####@####.####
Date:
21 Apr 2005 00:12:50 +0100
Message-Id: <20050420231218.84122.qmail@web41725.mail.yahoo.com>
I'm using some 'CVS' version. I recently found what
seems to be CVS snapshots at:
http://www.linuxhacker.org/pub/cvs-snapshots/microwin-greg/
(the last one is 10-Apr-2005)
It is basically 0.90 + several patches already applied
into greg's CVS.
Maybe you should check with the convbmp.c of this
version to see if the problem has been solved.
Alain
--- Will Hua Zheng ####@####.#### wrote:
> Which version are you using? I am using 0.9, the
> convbmp.c in this source
> does not have the endian-neutral conversion in its
> header. The file that I
> am talking about is
> microwindows-0.90/src/mwin/bmp/convbmp.c
>
> Anyway, attached is the convbmp.c that I modified.
> It was a quick-and-dirty
> mod and I was satisfied as long as it worked for me.
> It does not have
> support for PDP-endianness, which is a mess and
> nobody really uses anyways.
> I added some byte-reordering code to reorder the
> bytes in the BMP header
> struct, which uses 2 and 4 byte words. The rest of
> the code was fine.
>
> Best regards,
>
> Will Zheng
> --
> 3452 - TEST SYSTEMS ENGINEERING
> Jet Propulsion Laboratory
> M/S 156-142
> 4800 Oak Grove Drive
> Pasadena, CA 91109
>
> Phone: 818-648-9656
> Email: ####@####.####
>
> -----Original Message-----
> From: alain volmat ####@####.####
> Sent: Wednesday, April 20, 2005 7:31 AM
> To: Will Hua Zheng; ####@####.####
> Subject: Re: [nanogui] convbmp big-endian bug?
>
> Hi Will,
>
> sorry, I have almost never used mwin (always nanoX)
> so
> I can't tell you much about that, however the file
> header of conv_bmp.c says:
>
> * 9/24/2003 endian-neutral conversion
>
> so I guess that there should be some support (maybe
> buggy for big endian too) ...
>
> would you mind share with us your mods. If it comes
> that conv_bmp.c do have problems in big endians, we
> should correct that in the current tree.
>
> Alain
>
> --- Will Hua Zheng ####@####.#### wrote:
> > I was trying to compile nano-X for a powerpc-405
> > based board. The CPU
> > was set with big-endian operation mode. I
> configured
> > (0.9 version)
> > microwindows to use BIGENDIAN=Y. I issued the make
> > command but the make
> > process stops at convbmp -o car8.c car8.bmp.
> > Checking the source code of
> > convbmp I realized that convbmp only works on
> little
> > endian machines. So
> > I wrote some byte reordering code in convbmp and
> > recompiled the code and
> > it's now converting bmps into .c's correctly.
> >
> > My question is, was I doing something wrong? Is
> the
> > convbmp code really
> > only for little endian machines or did I not set
> up
> > some configuration
> > code right?
> >
> > Regards,
> > Will Zheng
> >
> >
>
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