[Digikam-devel] [digikam] [Bug 322789] Enabling "color managed view" in editor slows down tool startup

[Marcel Wiesweg]

https://bugs.kde.org/show_bug.cgi?id=322789

--- Comment #29 from Marcel Wiesweg <marcel.wiesweg at gmx.de> ---
Why do we not encounter these problems with other places where images are
drawn, mainly the preview view?
1) color correction is applied as part of the loading process on the whole
picture.
2) there is no tiling, but of course painting region optimization, and there is
caching of scaled pixmap content
3) All is redrawn when CM settings change.

Apparently point 1) cannot be fully transferred to the editor, where we must
edit the original data. Color correction could yet be done on the preview,
before displaying it.
Pixmap caching should come for free if the new branch should be successfully
integrated at some time.

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