Fedora java png parser issue

[Marius Andreiana]

Hi all,

Please see this bug
https://bugzilla.redhat.com/show_bug.cgi?id=665355

Fedora java distribution cannot read some PNG images which work fine in
* Windows java 1.6
* Linux image viewers
* browsers
* "identify a.png" works: PNG 16x16 16x16+0+0 8-bit DirectClass 1.38KB 0.000u
0:00.000

(more info and code to reproduce in bug).

Do you have any suggestion for workarounds or fix? (besides re-generating
all pngs somehow)

Thanks

[Mat Booth]

On 23 December 2010 12:01, Marius Andreiana <marius.andreiana2(a)gmail.com&gt; wrote:
>  Hi all,
>
>  Please see this bug
>  https://bugzilla.redhat.com/show_bug.cgi?id=665355
>
>  Fedora java distribution cannot read some PNG images which work fine in
>  * Windows java 1.6
>  * Linux image viewers
>  * browsers
>  * "identify a.png" works: PNG 16x16 16x16+0+0 8-bit DirectClass 1.38KB
>  0.000u
>
>  0:00.000
>
>  (more info and code to reproduce in bug).
>
>  Do you have any suggestion for workarounds or fix? (besides re-generating
>  all pngs somehow)
>
>  Thanks
>  

You might get more response from the java-devel list. I will forward
this message to that list.


-- 
Mat Booth
http://fedoraproject.org/get-fedora

[Andrew Haley]

On 12/23/2010 03:01 PM, Mat Booth wrote:
>  On 23 December 2010 12:01, Marius
> Andreiana<marius.andreiana2(a)gmail.com>  wrote:
> > Hi all,
> >
> > Please see this bug
> > https://bugzilla.redhat.com/show_bug.cgi?id=665355
> >
> > Fedora java distribution cannot read some PNG images which work fine in
> > * Windows java 1.6
> > * Linux image viewers
> > * browsers
> > * "identify a.png" works: PNG 16x16 16x16+0+0 8-bit DirectClass 1.38KB
> > 0.000u
> >
> > 0:00.000
> >
> > (more info and code to reproduce in bug).
> >
> > Do you have any suggestion for workarounds or fix? (besides re-generating
> > all pngs somehow)
>
>  You might get more response from the java-devel list. I will forward
>  this message to that list. 
I assure you that the Red Hat Java team is listening.  :-)

Right now I have no idea what the problem might be.

Andrew.

[Deepak Bhole]

* Andrew Haley <aph(a)redhat.com&gt; [2010-12-23 10:58]:
>  On 12/23/2010 03:01 PM, Mat Booth wrote:
>  > On 23 December 2010 12:01, Marius Andreiana&lt;marius.andreiana2(a)gmail.com&gt; 
> wrote:
>  >> Hi all,
>  >>
>  >> Please see this bug
>  >> https://bugzilla.redhat.com/show_bug.cgi?id=665355
>  >>
>  >> Fedora java distribution cannot read some PNG images which work fine in
>  >> * Windows java 1.6
>  >> * Linux image viewers
>  >> * browsers
>  >> * "identify a.png" works: PNG 16x16 16x16+0+0 8-bit DirectClass
> 1.38KB
>  >> 0.000u
>  >>
>  >> 0:00.000
>  >>
>  >> (more info and code to reproduce in bug).
>  >>
>  >> Do you have any suggestion for workarounds or fix? (besides re-generating
>  >> all pngs somehow)
>  >
>  > You might get more response from the java-devel list. I will forward
>  > this message to that list.
>  
>  I assure you that the Red Hat Java team is listening.  :-)
>  
>  Right now I have no idea what the problem might be.
>   
I am looking into this now.

Cheers,
Deepak

>  Andrew.
>  -- 
>  devel mailing list
>  devel(a)lists.fedoraproject.org
>  https://admin.fedoraproject.org/mailman/listinfo/devel

[Deepak Bhole]

* Marius Andreiana <marius.andreiana2(a)gmail.com&gt; [2010-12-23 07:01]:
>  Hi all,
>  
>  Please see this bug
>  https://bugzilla.redhat.com/show_bug.cgi?id=665355
>  
>  Fedora java distribution cannot read some PNG images which work fine in
>  * Windows java 1.6
>  * Linux image viewers
>  * browsers
>  * "identify a.png" works: PNG 16x16 16x16+0+0 8-bit DirectClass 1.38KB 0.000u
>  0:00.000
>  
>  (more info and code to reproduce in bug).
>  
>  Do you have any suggestion for workarounds or fix? (besides re-generating
>  all pngs somehow)
>   
Hi,

I have identified the problem. It is already fixed upstream in OpenJDK7.
I have requested a backport to openjdk6 and to icedtea6 (the latter so
that it can go in Fedora sooner):

http://mail.openjdk.java.net/pipermail/distro-pkg-dev/2010-December/01157...

If you are comfortable with building IcedTea
(http://icedtea.classpath.org/wiki/Main_Page#Quick_start_.26_Building),
or the java-1.6.0-openjdk RPM, you can apply the above patch and do so
and it should resolve the issue.

Outside of a new JDK build, your only option unfortunately is to fix the
iTXt chunks in the pngs and regenerate them.

Cheers,
Deepak

>  Thanks 
>  -- 
>  devel mailing list
>  devel(a)lists.fedoraproject.org
>  https://admin.fedoraproject.org/mailman/listinfo/devel

[Marius Andreiana]

On Thu, Dec 23, 2010 at 10:42 PM, Deepak Bhole <dbhole(a)redhat.com&gt; wrote:

>  Hi,
>
>  I have identified the problem. 
Thanks Deepak for the quick and thorough investigation!