Review Request 121886: Fix thumbnailing (for filemanager) by separate thumbnailer for Krita file types

[Boudewijn Rempt]

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I do agree with moving the kimgio plugins around, btw.

- Boudewijn Rempt


On Jan. 6, 2015, 9:25 p.m., Friedrich W. H. Kossebau wrote:
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> https://git.reviewboard.kde.org/r/121886/
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> 
> (Updated Jan. 6, 2015, 9:25 p.m.)
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> 
> Review request for Calligra and Boudewijn Rempt.
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> Repository: calligra
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> 
> Description
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> The central Calligra thumbnailing plugin for filemanagers assumes document classes to be based on KoDocument & KoPart. Which no longer holds true for Krita after MVC got merged, KisDocument has nothing to do with that.
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> So a separate thumbnailer with KisDocument specific code is needed. And here I propose a first version. It should make thumbnailing for ORA, KRA and KRAANIM files work again.
> 
> Despite being a plugin (for the KDE filemanager thumbnailing system) I did not put the thumbnailer into `krita/plugins`, but instead added a subdir `krita/integration`, given this is not a plugin _for_ Krita, but _from_ Krita for other systems. I would also propose to move `krita/plugins/kimgio` to that new subdir, for consistency.
> 
> TODO:
> when behind the scenes the thumbnailing plugin is shutdown due to being unused, it crashes e.g. like this
> ```
> CRITICAL: According to statistics of the KisTileDataStore some tiles have leaked from the Krita control! 
> CRITICAL: Tiles in memory: 20034 Total tiles: 20034 
> kio_thumbnail(10513)/krita (registry) KisPaintOpRegistry::~KisPaintOpRegistry: Deleting KisPaintOpRegistry
> kio_thumbnail(10513)/krita (registry) KisBrushServer::~KisBrushServer: deleting KisBrushServer
> Fatal Error: Accessed global static 'KisMemoryLeakTracker *s_instance()' after destruction. Defined at /home/koder/Kode/kdegit/Calligra/calligra/krita/image/kis_memory_leak_tracker.cpp:45
> kioslave: ####### CRASH ###### protocol = thumbnail pid = 10513 signal = 6
> ```
> Not perfect (though not preventing any thumbnailing), any idea what might setup/shutdown be missing for the thumbnailer?
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> 
> Diffs
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>   extras/thumbnail/CMakeLists.txt 6c29b50 
>   extras/thumbnail/krita_kra_thumbnail.desktop d44255a 
>   extras/thumbnail/kritaanimation_kranim_thumbnail.desktop cd569b3 
>   krita/CMakeLists.txt 55ecc80 
>   krita/integration/CMakeLists.txt PRE-CREATION 
>   krita/integration/thumbnail/CMakeLists.txt PRE-CREATION 
>   krita/integration/thumbnail/krita_kra_thumbnail.desktop PRE-CREATION 
>   krita/integration/thumbnail/kritaanimation_kranim_thumbnail.desktop PRE-CREATION 
>   krita/integration/thumbnail/kritacreator.h PRE-CREATION 
>   krita/integration/thumbnail/kritacreator.cpp PRE-CREATION 
>   krita/plugins/formats/ora/krita_ora_thumbnail.desktop a7b0f60 
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> Diff: https://git.reviewboard.kde.org/r/121886/diff/
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> Testing
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> 
> Thanks,
> 
> Friedrich W. H. Kossebau
> 
>

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