png problems

[John Carnahan]

All,

I believe that there is something wrong with the png files that are
created by sceenshots in swarm. I have created a small series of images
and viewed under xv they look fine. I even used pngcheck to test them and
it does not report any errors. It does report that the images are valid
1024 x 768 - 24 bit images. When I try converting these images, however, I
get fatal errors:

1. The app 'ptot' spits out the error:

  > ptot banambani.rootwindow.0000.png 
  WARNING: Invalid (but recoverable) PNG file.
  WARNING: Extra bytes in PNG file ignored.
  ERROR: Failure reading input file.

and no tiff file is created. I tried running the app on another color png
file and no such problems.

2. The app 'pngtopnm' chokes with a segmentation fault. Interestingly a
semi-valid pnm(ppm) is still created. The new pnm file can be viewed with
xv and gimp. This file however cannot be converted to anything else by
pnmtoxxx nor can it be manipulated by the other pnm tools. 


Has anyone else had this problem? Would it be that if I switch my screen
to 640x480x8 I would not have this problem? I would hate that to be the
case. I say this since 24 bit screenshots are new to swarm1.3.1. Any ideas
on where I could start looking to fix this problem would be appreciated.

Thanks
John


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