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[Bug 186054] New: digikam can't handle non-rgb TIFF files

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Geert Janssens-2

[Bug 186054] New: digikam can't handle non-rgb TIFF files

https://bugs.kde.org/show_bug.cgi?id=186054

Summary: digikam can't handle non-rgb TIFF files
Product: digikam
Version: unspecified
Platform: Fedora RPMs
OS/Version: Linux
Status: UNCONFIRMED
Severity: wishlist
Priority: NOR
Component: general
AssignedTo: [hidden email]
ReportedBy: [hidden email]

Version: 10.0-rc2 (using KDE 4.2.0)
OS: Linux
Installed from: Fedora RPMs

This issue was mentioned shortly in another bug, which is now closed:
https://bugs.kde.org/show_bug.cgi?id=125916
(see comment 54: https://bugs.kde.org/show_bug.cgi?id=125916#c54)

At present digikam only supports TIFF images in RGB format. However, I recently
added a lot of CMYK TIFF images to my library (I have received them from my
prepress agency).

Digikam is pretty useless with those images. For example:
* thumbnail generation silently fails with this message on the command line:
Digikam::TIFFLoader::load: Can not handle image without RGBcolor-space
* trying to preview the images fails with message:
Cannot display preview for "xxxx".tif
* the same goes for the image editor

As bug #125916 is closed and I can't find any other bug report on this, I
decided to add another wish to implement this functionality.

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Gilles Caulier-4

[Bug 186054] digikam can't handle non-rgb TIFF files

https://bugs.kde.org/show_bug.cgi?id=186054

Gilles Caulier <[hidden email]> changed:

What |Removed |Added
----------------------------------------------------------------------------
Component|general |Image Editor
Version|unspecified |0.10.0-rc2

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Geert Janssens-2

[Bug 186054] digikam can't handle non-rgb TIFF files

In reply to this post by Geert Janssens-2

https://bugs.kde.org/show_bug.cgi?id=186054

--- Comment #1 from Geert Janssens <info kobaltwit be> 2009-04-06 19:52:54 ---
This issue is still there in digikam 10.0 final.

Gilles, in https://bugs.kde.org/show_bug.cgi?id=125916#c54 you mention

> I have a solution to handle non-RGB color-space picture
> using lcms library, but i have not yet implemented this
> one in my computer.

Would be be difficult to implement this ? This fix would really improve my user
experience with digikam, so if not to difficult I would really like to see it
fixed in the next version.

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Geert Janssens-2

[Bug 186054] digikam can't handle non-rgb TIFF files

In reply to this post by Geert Janssens-2

https://bugs.kde.org/show_bug.cgi?id=186054

--- Comment #2 from Geert Janssens <info kobaltwit be> 2009-06-10 10:42:31 ---
Can this bug be fixed before the final 1.0 release, please ?

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Gilles Caulier-4

[Bug 186054] digikam can't handle non-rgb TIFF files

In reply to this post by Geert Janssens-2

https://bugs.kde.org/show_bug.cgi?id=186054

Gilles Caulier <[hidden email]> changed:

What |Removed |Added
----------------------------------------------------------------------------
Version|0.10.0-rc2 |0.10.0

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[Bug 186054] digikam can't handle non-rgb TIFF files

In reply to this post by Geert Janssens-2

https://bugs.kde.org/show_bug.cgi?id=186054

Michal Thoma <[hidden email]> changed:

What |Removed |Added
----------------------------------------------------------------------------
CC| |[hidden email]

--- Comment #3 from Michal Thoma <michal thoma cz> 2009-08-12 15:56:36 ---
I'm also missing CMYK support for the similar reasons. I have good bunch of
high quality scans in CMYK. Unfortunately Digikam can't display although it
correctly identifies image is CMYK.

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Geert Janssens-2

[Bug 186054] digikam can't handle non-rgb TIFF files

In reply to this post by Geert Janssens-2

https://bugs.kde.org/show_bug.cgi?id=186054

--- Comment #4 from Geert Janssens <info kobaltwit be> 2009-11-09 21:49:14 ---
I tested this today with 1.0.0beta5 on rawhide. The problem is still there.

And no reply from the developers on whether or not it will be fixed...

My apologies if I sound like nagging, but I think it would be a really useful
improvement and Gilles suggested in the previous bug that the fix would not be
too complicated.

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Geert Janssens-2

[Bug 186054] digikam can't handle non-rgb TIFF files

In reply to this post by Geert Janssens-2

https://bugs.kde.org/show_bug.cgi?id=186054

--- Comment #5 from Geert Janssens <info kobaltwit be> 2009-12-01 14:11:03 ---
Nothing seems to happen with this bug.

I wonder, is cmyk support for tif images actually something that should be in
digikam directly, or rather in one of the base libs (like libtiff or
something).

Can a digikam dev voice his opinion about this ? If it's not digikam, it can be
reassigned.

Anyway, I just want to see some progress on this bug, and I'm trying to find
out why it stalls right now.

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[Bug 186054] digikam can't handle non-rgb TIFF files

In reply to this post by Geert Janssens-2

https://bugs.kde.org/show_bug.cgi?id=186054

--- Comment #6 from Marcel Wiesweg <marcel wiesweg gmx de> 2009-12-02 21:09:44 ---
I'm not sure how complicated the fix is, I have no experience with CMYK images.
Probably not something to be done shortly with a few lines of code.
If someone knows it's easy give us a hint.

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Gilles Caulier-4

[Bug 186054] digikam can't handle non-rgb TIFF files

In reply to this post by Geert Janssens-2

https://bugs.kde.org/show_bug.cgi?id=186054

--- Comment #7 from Gilles Caulier <caulier gilles gmail com> 2009-12-02 23:36:04 ---
Marcel,

Look in JPEG loader. JPEG support CMJN too and you have add some code (taken
from Qt if i remember) to convert to RGB color space... I think the same can be
do in TIFF loader.

Else, perhaps ImageMagick or Krita tiff loader as this code (based on libtiff).
I can take a look.

Gilles

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[Bug 186054] digikam can't handle non-rgb TIFF files

In reply to this post by Geert Janssens-2

https://bugs.kde.org/show_bug.cgi?id=186054

Jens Mueller <[hidden email]> changed:

What |Removed |Added
----------------------------------------------------------------------------
CC| |[hidden email]

--- Comment #8 from Jens Mueller <tschenser gmx de> 2009-12-22 22:20:12 ---
For 8bit images only: why do we give up so early? We use for 8bit images
TIFFRGBAImageGet(...), this function can handle nearly all tiff encodings (also
CYMK), but in tiffloader.cpp line 192 only RGB and MINISBLACK color codings are
allowed.

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Gilles Caulier-4

[digikam] [Bug 186054] FILEIO : add non-rgb TIFF files support

In reply to this post by Geert Janssens-2

https://bugs.kde.org/show_bug.cgi?id=186054

Gilles Caulier <[hidden email]> changed:

What |Removed |Added
----------------------------------------------------------------------------
Summary|digikam can't handle |FILEIO : add non-rgb TIFF
|non-rgb TIFF files |files support
CC| |[hidden email]

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Gilles Caulier-4

[digikam] [Bug 186054] FILEIO : add non-rgb TIFF files support

In reply to this post by Geert Janssens-2

https://bugs.kde.org/show_bug.cgi?id=186054

Gilles Caulier <[hidden email]> changed:

What |Removed |Added
----------------------------------------------------------------------------
CC| |[hidden email]

--- Comment #9 from Gilles Caulier <[hidden email]> ---
*** Bug 268059 has been marked as a duplicate of this bug. ***

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Gilles Caulier-4

[digikam] [Bug 186054] FILEIO : add non-rgb TIFF files support

In reply to this post by Geert Janssens-2

https://bugs.kde.org/show_bug.cgi?id=186054

Gilles Caulier <[hidden email]> changed:

What |Removed |Added
----------------------------------------------------------------------------
CC| |[hidden email]

--- Comment #10 from Gilles Caulier <[hidden email]> ---
*** Bug 219542 has been marked as a duplicate of this bug. ***

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Gilles Caulier-4

[digikam] [Bug 186054] FILEIO : add non-rgb TIFF files support

In reply to this post by Geert Janssens-2

https://bugs.kde.org/show_bug.cgi?id=186054

Gilles Caulier <[hidden email]> changed:

What |Removed |Added
----------------------------------------------------------------------------
CC| |[hidden email]

--- Comment #11 from Gilles Caulier <[hidden email]> ---
*** Bug 347271 has been marked as a duplicate of this bug. ***

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[digikam] [Bug 186054] FILEIO : add non-rgb TIFF files support

In reply to this post by Geert Janssens-2

https://bugs.kde.org/show_bug.cgi?id=186054

Maik Qualmann <[hidden email]> changed:

What |Removed |Added
----------------------------------------------------------------------------
CC| |[hidden email]

--- Comment #12 from Maik Qualmann <[hidden email]> ---
Created attachment 92503
--> https://bugs.kde.org/attachment.cgi?id=92503&action=edit
tiffloader.patch

This patch enabled the loading of TIFF images with YCbCr or CMYK color model
with 8 bits color depth.
Maik

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[digikam] [Bug 186054] FILEIO : add non-rgb TIFF files support [patch}

In reply to this post by Geert Janssens-2

https://bugs.kde.org/show_bug.cgi?id=186054

Maik Qualmann <[hidden email]> changed:

What |Removed |Added
----------------------------------------------------------------------------
Summary|FILEIO : add non-rgb TIFF |FILEIO : add non-rgb TIFF
|files support |files support [patch}

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[digikam] [Bug 186054] FILEIO : add non-rgb TIFF files support [patch]

In reply to this post by Geert Janssens-2

https://bugs.kde.org/show_bug.cgi?id=186054

Maik Qualmann <[hidden email]> changed:

What |Removed |Added
----------------------------------------------------------------------------
Summary|FILEIO : add non-rgb TIFF |FILEIO : add non-rgb TIFF
|files support [patch} |files support [patch]

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Gilles Caulier-4

[digikam] [Bug 186054] FILEIO : add non-rgb TIFF files support [patch]

In reply to this post by Geert Janssens-2

https://bugs.kde.org/show_bug.cgi?id=186054

--- Comment #13 from Gilles Caulier <[hidden email]> ---
Patch is fine for me...

Gilles

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Geert Janssens-2

[digikam] [Bug 186054] FILEIO : add non-rgb TIFF files support [patch]

In reply to this post by Geert Janssens-2

https://bugs.kde.org/show_bug.cgi?id=186054

--- Comment #14 from Geert Janssens <[hidden email]> ---
Wonderful ! I'm looking forward to seeing this patch integrated in a future
version of digikam.

One comment: if the tiffloader now is capable of displaying CMYK images as well
as RGB ones, shouldn't the error message for unknown formats be a bit more
precise ?

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