[Bug 237492] New: Grayscale TIFF display broken

[Michal Thoma]

https://bugs.kde.org/show_bug.cgi?id=237492

           Summary: Grayscale TIFF display broken
           Product: digikam
           Version: unspecified
          Platform: Ubuntu Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: [hidden email]
        ReportedBy: [hidden email]


Version:           1.2 (using KDE 4.4.2)
OS:                Linux
Installed from:    Ubuntu Packages

While trying to display grayscale TIFF  (1 color channel, no RGB), image
preview is broken. Surprisingly thumbanil is created correctly.

The sample image saved in Adobe Photoshop CS2 is as here:

http://michal.thoma.cz/digikam/grayscale_nocompression_nolayers.tif

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[Michal Thoma]

https://bugs.kde.org/show_bug.cgi?id=237492





--- Comment #1 from Michal Thoma <michal thoma cz>  2010-05-13 13:36:21 ---
One important new finding - it seems that the display is broken only when image
has color profile. The grayscale TIFF without color profile is displayed
correctly.

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=237492


Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[hidden email]
          Component|general                     |Color Management
            Version|unspecified                 |1.2.0




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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=237492


Gilles Caulier <[hidden email]> changed:

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                 CC|                            |[hidden email]




--- Comment #2 from Gilles Caulier <caulier gilles gmail com>  2010-05-14 07:47:53 ---
*** Bug 237494 has been marked as a duplicate of this bug. ***

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[Michal Thoma]

https://bugs.kde.org/show_bug.cgi?id=237492





--- Comment #3 from Michal Thoma <michal thoma cz>  2010-11-23 15:38:56 ---
This bug is apparently not duplicate as it still exist in 1.6.0. Maybe it's
related to the Bug 237494 though definitely not repaired still.

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[Michal Thoma]

https://bugs.kde.org/show_bug.cgi?id=237492


Michal Thoma <[hidden email]> changed:

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                 CC|                            |[hidden email]




--- Comment #4 from Michal Thoma <michal thoma cz>  2010-12-27 14:05:54 ---
The bug is still there in 1.7.0

It's not only TIFF - all grayscale (one color channel) images are affected.

So to repeat what is known

1. Take image in grayscale mode (tiff, jpeg or whatever)
2. Turn color management on.
3. Open in Digikam - Thumbnail is created well, displaying image is broken.
Same with edit.

Surprisingly image can be processed through BQM with no problem. Only mode is
changed from grayscale to RGB...

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[Marcel Wiesweg]

https://bugs.kde.org/show_bug.cgi?id=237492


Marcel Wiesweg <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED




--- Comment #5 from Marcel Wiesweg <marcel wiesweg gmx de>  2011-01-26 12:38:16 ---
This was fixed recently. It was discussed in another bug entry which I dont
find anymore. Color management code for grayscale was broken.

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=237492

Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Version Fixed In|                            |1.9.0

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