LIBPNG: PNG reference library / Bugs / #222 idat problem libpng-1.6.10

#222 idat problem libpng-1.6.10

Milestone: libpng_code

Status: closed-invalid

Owner: Glenn Randers-Pehrson

Labels: None

Priority: 1

Updated: 2014-04-12

Created: 2014-04-12

Creator: Yury Fedorchenko

Private: No

affected: <=libpng-1.6.10
unaffected: libpng-1.5.*
libpng error: IDAT: invalid distance too far back
ShiftyEngine Error: Unable to load: /usr/share/games/scramble/pics/background.png

you may get problem image from http://distfiles.gentoo.org/distfiles/scramble-0.9.5.tar.gz
because homepage of scramble is now unreachable.

Discussion

Yury Fedorchenko - 2014-04-12

image

background.png

If you would like to refer to this comment somewhere else in this project, copy and paste the following link:

Yury Fedorchenko - 2014-04-12

hm, image seams has been reconverted. original in archive

background.png.gz

If you would like to refer to this comment somewhere else in this project, copy and paste the following link:

Glenn Randers-Pehrson - 2014-04-12

status: open --> closed-invalid

assigned_to: Glenn Randers-Pehrson
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:

Glenn Randers-Pehrson - 2014-04-12

This is a known issue. You can use libpng's "contrib/tools/pngfix", "pngcrush", or any libng15-based application to repair such invalid PNG files. The problem is that the zlib datastream looks back further than the beginning of the sliding window while decompressing.

If you would like to refer to this comment somewhere else in this project, copy and paste the following link:

idat problem libpng-1.6.10

Group

Searches

Help

#222 idat problem libpng-1.6.10

Discussion