[Bug 144268] New: Showfoto unable to open some png file

[Raphaël Gertz]

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           Summary: Showfoto unable to open some png file
           Product: showfoto
           Version: unspecified
          Platform: unspecified
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: digikam-devel kde org
        ReportedBy: rapsys free fr


Version:           0.5.0 (using KDE 3.5.4, compiled sources)
Compiler:          Target: i586-mandriva-linux-gnu
OS:                Linux (i686) release 2.6.20-tmb-desktop-2mdv

In fact i noticed some problem with some png.

Showfoto is completely unable to open them and issue an error.

If i open the png in gimp2, then save it, then re-open with showfoto it works.

I attached an example
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[Raphaël Gertz]

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------- Additional Comments From rapsys free fr  2007-04-15 21:37 -------
Created an attachment (id=20281)
 --> (http://bugs.kde.org/attachment.cgi?id=20281&action=view)
Original png (fail)
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[Raphaël Gertz]

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------- Additional Comments From rapsys free fr  2007-04-15 21:39 -------
Created an attachment (id=20282)
 --> (http://bugs.kde.org/attachment.cgi?id=20282&action=view)
Same png but saved from gimp (works)
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[Gilles Caulier-4]

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------- Additional Comments From caulier.gilles gmail com  2007-04-15 22:25 -------
When i try to load the broken image in showfoto, libpng return an error :

libpng error: incorrect header check

This is want mean than your image is corrupted. Thi sis not a problem with showfoto, but with libpng.

Gilles Caulier
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[Raphaël Gertz]

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------- Additional Comments From rapsys free fr  2007-04-17 11:48 -------
I don't think it's only a libpng bug...

As the thumnail generation of the file works perfectly (even in showfoto)

Si i think there is a bug in showfoto
(gimp use libpng too, so it should be fail then too)
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[Γιώργος Πάλλας]

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------- Additional Comments From gpall ccf auth gr  2007-09-22 10:10 -------
I also have the same problem. The fact is that I haven't been able to open any .png with showfoto, except from the one that rapsys has uploaded (the one saved from gimp I mean).

And I don't think it's a libpng problem because many of the files that I get an error trying to open were created for example by PhotoShop. In addition to that, all those pngs open just fine using other kde applications (kview for example).
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rolandwolters web de changed:

           What    |Removed                     |Added
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------- Additional Comments From rolandwolters web de  2007-09-26 15:16 -------
The same is true for me:
There are several png images I have which worked perfectly in digikam before, but now fail to be opened. Other applications have no problem at all.

My libpng version is 1.2.16, the digikam version is 0.9.2
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[Gilles Caulier-4]

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------- Additional Comments From caulier.gilles gmail com  2007-09-26 16:08 -------
I confirm that it's a bug in libpng.

On my computer (Mandriva 2007.1 + cooker RPMs) i have this issue:

* with libpng 1.2.13 = digiKam for KDE3 or KDE4 is not able to thumb/preview/load png image provided by rapsys.

* to update libpng to 1.2.19, problem has desapears...

Note : showfoto == digiKam image editor. Issue is reproductible in showfoto for KDE3 or KDE4

Gilles
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[Gilles Caulier-4]

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------- Additional Comments From caulier.gilles gmail com  2007-09-26 16:10 -------
Notes:

- i have used current code of digiKam 0.9.3 from svn, not 0.9.2.

- i have recompiled digiKam of course after to update libpng.

Gilles
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------- Additional Comments From rolandwolters web de  2007-12-15 12:56 -------
The problem is still valid for me with libpng 1.2.22 and showfoto.
Showfoto is the only image program I have which has problems opening these files - all others I've tested (Kuickshow, KView, Gwenview, Gimp, ooDraw) worked.
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[Arnd Baecker]

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------- Additional Comments From arnd.baecker web de  2007-12-15 13:55 -------
Just to be sure: are you using digikam 0.9.3-rc1 now?
(And you did recompile digikam after the update to libpng 1.2.22?)

What is the error message on the konsole?

What is the output of
  ldd PATH/TO/DIGIKAM/digikam | grep png
(You can get the path via `which digikam` on the konsole)
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------- Additional Comments From rolandwolters web de  2007-12-15 17:10 -------
$ rpm -q digikam
digikam-0.9.2-5.fc8

The error in the konsole is the same as above:
libpng error: incorrect header check

$ ldd `which digikam`|grep png
        libpng12.so.0 => /usr/lib/libpng12.so.0 (0x00832000)

$ ll /usr/lib/libpng12.so.0
lrwxrwxrwx 1 root root 18  2. Nov 13:17 /usr/lib/libpng12.so.0 -> libpng12.so.0.22.0

About the rebuild: rom reports that digikam was rebuild in September - with an older version of libpng (1.2.22 was built in October). I will ask in bugzilla of Fedora for a rebuild of digikam.
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------- Additional Comments From rolandwolters web de  2007-12-15 17:16 -------
I meant rpm, not rom. Anyway, the related bug report in Fedora's bugzilla is here:
https://bugzilla.redhat.com/show_bug.cgi?id=425781
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[Arnd Baecker]

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------- Additional Comments From arnd.baecker web de  2007-12-15 18:35 -------
Of course, you could try to build digikam yourself, see the
installation instructions at: http://www.digikam.org/?q=download/svn
in particular below "Install digiKam in your Home Directory"
(Don't hesitate to ask on digikam-users if you run into any problems ...)
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------- Additional Comments From mgarski post pl  2008-01-19 14:42 -------
I have compiled digikam-0.9.2 (libpng-1.2.22) with enabled debug messages in pngloader.cpp:

showfoto: /home/marcin/bad.png : PNG file identified
showfoto: [virtual bool Digikam::PNGLoader::load(const QString&, Digikam::DImgLoaderObserver*)] PNG in >=8 bits/color/pixel.
showfoto: PNG in PNG_COLOR_TYPE_RGB
libpng error: incorrect header check
showfoto: [virtual bool Digikam::PNGLoader::load(const QString&, Digikam::DImgLoaderObserver*)] Internal libPNG error during reading file. Process aborted!
kio_digikamthumbnail: /home/marcin/bad.png : PNG file identified
kio_digikamthumbnail: [virtual bool Digikam::PNGLoader::load(const QString&, Digikam::DImgLoaderObserver*)] PNG in >=8 bits/color/pixel.
kio_digikamthumbnail: PNG in PNG_COLOR_TYPE_RGB
libpng error: incorrect header check
kio_digikamthumbnail: [virtual bool Digikam::PNGLoader::load(const QString&, Digikam::DImgLoaderObserver*)] Internal libPNG error during reading file. Process aborted!
kio_digikamthumbnail: /home/marcin/bad.png : PNG file identified
kio_digikamthumbnail: [virtual bool Digikam::PNGLoader::load(const QString&, Digikam::DImgLoaderObserver*)] PNG in >=8 bits/color/pixel.
kio_digikamthumbnail: PNG in PNG_COLOR_TYPE_RGB
libpng error: incorrect header check
kio_digikamthumbnail: [virtual bool Digikam::PNGLoader::load(const QString&, Digikam::DImgLoaderObserver*)] Internal libPNG error during reading file. Process aborted!
kio_digikamthumbnail: No relevant plugin found
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[Gilles Caulier-4]

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------- Additional Comments From caulier.gilles gmail com  2008-01-19 14:51 -------
Look like libpng cannot open the file properlly. THis is not the fault to digiKam PNG loader i think...

Gilles Caulier
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[Raphaël Gertz]

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------- Additional Comments From rapsys free fr  2008-01-19 17:08 -------
Le Saturday 19 January 2008 14:51:54 Gilles Caulier, vous avez écrit :
[bugs.kde.org quoted mail]

It is, cause gimp and other are loading the same png correctly, plz take a
look at how they success open it...

It's ok in koffice-krita or gimp and even in gwenview, why showphoto or
digikam is unable to open it ???
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[Gilles Caulier-4]

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------- Additional Comments From caulier.gilles gmail com  2008-03-19 12:27 -------
Rapsy,

This entry still valid using showfoto 0.7.0 ?

Gilles Caulier
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