[Digikam-devel] [Bug 193967] VERY fast loading of thumbnails [PATCH]

[Mikolaj Machowski]

https://bugs.kde.org/show_bug.cgi?id=193967





--- Comment #21 from Mikolaj Machowski <mikmach wp pl>  2009-05-25 19:48:48 ---
Gilles

1) as Andi wrote it would be good to test how generation of thumbs with
cheatScale is going
2) I think I understand misunderstanding. For you second pass is when
thumbnails were generated and only loaded from disk; for me second pass means
that when loading thumbs they are loaded in two steps - first with
FastTransformation, second time, after 2-3 seconds of inactivity in Album GUI,
with SmoothTransformation; in your terminology it would 2.5 or 3 pass.

About sizes:
size == 256 do nothing - as far as I understand this works now
size < 128 - in this area side effects of FastTransformation are really visible
so here users will be hit hard in quality

When 3 people told me that they see no difference I recompiled digiKam for each
of three variants (Smooth, Fast, cheat) to test again. Well, I see difference
between Smooth and Fast - maybe not so dramatic as I perceived yesterday - but
there is. May it be not worth to sacrifice quality? For me trade-off is worth
but for most of users of this solution it is not.

So, I propose to revert this whole thing but still investigate use of
cheatScale for .thumbnails generation.

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