[Digikam-devel] [Bug 205776] New: "Embedded preview loads full image size" does not only do what it says, confusing users

[Matti Rintala]

https://bugs.kde.org/show_bug.cgi?id=205776

           Summary: "Embedded preview loads full image size" does not only
                    do what it says, confusing users
           Product: digikam
           Version: 0.10.0
          Platform: SuSE RPMs
        OS/Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: digikam-devel at kde.org
        ReportedBy: bitti at cs.tut.fi


Version:           0.10.0 (using KDE 4.2.4)
Installed from:    SuSE RPMs

For raw files, the user setting "Embedded preview loads full image size"
currently decides whether embedded jpg preview is used or whether "full-size"
preview is generated by digikam's raw decoding (in addition to limiting preview
size).

Nikon NEF files contain a full-size jpg preview of the raw file. This is never
used for full-size previews since Digikam chooses its own raw decoding instead,
if full-size previews are requested.

This is not ideal for Nikon NEF files:
If the NEF file has been edited with a program which non-destructively stores
edits in the NEF file itself (Capture NX2, for example), the embedded preview
correctly shows the edited image. Digikam's own raw decoding preview of course
only shows the original version (and Digikam's raw decoding does not use all
raw development settings in the file).

In my opinion there should be two user preferences:
- Whether to load fulls-size previews or limit preview to display size
- Whether to use embedded jpg preview with raw files or to decode the raw file
itself

Maybe it could be possible to combine these to preference with three options:
- Display-sized previews using embedded jpg if possible
- Full-sized previews using embedded jpg if possible
- Full-sized previews using decoded raw data

However, I think that preview size and preview raw decoding preference should
be separate.

Matti Rintala

P.S. I have already made a dirty hack for myself, and that only required minor
modifications in digikam/imagepreviewview.cpp. The decision on whether to add a
new user preference is bigger, of course.

-- 
Configure bugmail: https://bugs.kde.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.