libpng-1.6 png incompatibility

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libpng-1.6 png incompatibility

Bernhard M. Wiedemann
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Hi,

as a tester of openSUSE 13.1 I found that enigma trunk contains six
pngs that are not standards-compliant enough to be loaded with
libpng-1.6 (but worked with earlier libpng).

we are tracking this for openSUSE at
https://bugzilla.novell.com/show_bug.cgi?id=852862

6 files need fixing.
./attic/images-other/feather.png
./attic/images-other/feather-small.png
./doc/reference/images/construction.png
./data/gfx/ic-feather.png
./data/gfx/ic-normalmode.png
./data/gfx/ic-easymode.png


just re-encoding them with optipng or ImageMagick's convert is enough
to address this problem.

Thanks for your efforts.

Ciao
Bernhard M.
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Re: libpng-1.6 png incompatibility

Andreas Lochmann-2
Dear Bernhard,

thank you very much for your note, this
should be fixed with rev 2374 in our trunk.
Please nag if it still doesn't work or if there's
something else wrong.

Beste Grüße aus Marburg,
Andreas


Am 03.12.2013 11:25, schrieb Bernhard M. Wiedemann:
Hi,

as a tester of openSUSE 13.1 I found that enigma trunk contains six
pngs that are not standards-compliant enough to be loaded with
libpng-1.6 (but worked with earlier libpng).

we are tracking this for openSUSE at
https://bugzilla.novell.com/show_bug.cgi?id=852862

6 files need fixing.
./attic/images-other/feather.png
./attic/images-other/feather-small.png
./doc/reference/images/construction.png
./data/gfx/ic-feather.png
./data/gfx/ic-normalmode.png
./data/gfx/ic-easymode.png


just re-encoding them with optipng or ImageMagick's convert is enough
to address this problem.

Thanks for your efforts.

Ciao
Bernhard M.
>
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> Enigma-devel mailing list
> [hidden email]
> https://lists.nongnu.org/mailman/listinfo/enigma-devel




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Re: libpng-1.6 png incompatibility

Bernhard M. Wiedemann
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On 12/03/2013 10:10 PM, Andreas Lochmann wrote:
> Dear Bernhard,
>
> thank you very much for your note, this should be fixed with rev
> 2374 in our trunk. Please nag if it still doesn't work or if
> there's something else wrong.
>
> Beste Grüße aus Marburg, Andreas

thanks for fixing this.
I re-verified the current trunk and it looks good now.

btw: I wondered how those pngs were originally generated, because that
could help hitting this issue in the future.
five out of six had in strings output
"Comment
Created with The GIMP"

but at least my gimp-2.8 wrote a good png, so hopefully good now.


Gruesse aus Nuernberg
Bernhard M.
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Re: libpng-1.6 png incompatibility

Raoul-3
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Hi,


> thanks for fixing this.
> I re-verified the current trunk and it looks good now.

Please recheck the ic-feather.png. I had to encode
this (and only this) one again because the last version
showed some non transparent black background.

I used gimp-2.8 now to load and reexport
for this file.

> btw: I wondered how those pngs were originally generated, because that
> could help hitting this issue in the future.

Some file are very old and written maybe by gimp 2.4.


- -- Raoul
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