[Kde-pim] Review Request: Don't always recompress contact photos when saving

[Sebastian Scheibner]

> On Oct. 13, 2012, 8:38 a.m., Kevin Krammer wrote:
> > kabc/vcardtool.cpp, line 805
> > <http://git.reviewboard.kde.org/r/106745/diff/3/?file=88609#file88609line805>
> >
> >     I think you'll also need to save the type, otherwise pic will have rawData but no type and saving that would save rawData and empty type information.
> >     
> >     Make sure you have a roundtrip unittest for that

the type is set a few lines below in line 814.
I'll try to add a new test file vcardtooltest.cpp to test the parsePicture and createPicture function.


> On Oct. 13, 2012, 8:38 a.m., Kevin Krammer wrote:
> > kabc/picture.cpp, line 238
> > <http://git.reviewboard.kde.org/r/106745/diff/3/?file=88606#file88606line238>
> >
> >     Here you can keep the old code or read into a temporary QImage and call setData on picture


> On Oct. 13, 2012, 8:38 a.m., Kevin Krammer wrote:
> > kabc/picture.cpp, line 218
> > <http://git.reviewboard.kde.org/r/106745/diff/3/?file=88606#file88606line218>
> >
> >     If only mData is set and mRawData is empty, then this would not be the same output.
> >     Better keep the old code, but use data() for retrieveing the data (thus covering both cases)

you're right, I missed that, but I'd call rawData(), then the image is not recompressed if mRawData is already set.


> On Oct. 13, 2012, 8:38 a.m., Kevin Krammer wrote:
> > kabc/tests/picturetest.cpp, line 78
> > <http://git.reviewboard.kde.org/r/106745/diff/3/?file=88608#file88608line78>
> >
> >     I am not sure here, this changes the test.
> >     Maybe setData should not overrwite mType if it is set and use mType when serializing if set?

well the thing is, the QImage that is set with setData doesn't have a type itself. the type is only determined when the image is encoded to png/jpg and that happens in rawData(). If set Data doesn't overwrite the type, and e.g. type() returns "image/png" but rawData() returns a jpeg.


> On Oct. 13, 2012, 8:38 a.m., Kevin Krammer wrote:
> > kabc/picture.cpp, line 233
> > <http://git.reviewboard.kde.org/r/106745/diff/3/?file=88606#file88606line233>
> >
> >     I think for compatibility you'll need to have it like this
> >     return s << picture.d->mIntern << picture.d->mUrl << picture.d->mType << picture.data()

ok, just one thing, my test serializeTestInternRawData() won't work anymore, because the image will be recompressed as jpeg.


- Sebastian


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On Oct. 7, 2012, 9:52 a.m., Sebastian Scheibner wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> http://git.reviewboard.kde.org/r/106745/
> -----------------------------------------------------------
> 
> (Updated Oct. 7, 2012, 9:52 a.m.)
> 
> 
> Review request for KDEPIM-Libraries.
> 
> 
> Description
> -------
> 
> When changing a contact with a photo, the photo is recompressed when saving (even though the photo wasn't changed). That's because the photo is loaded into a QImage and when the contact is saved, the QImage is compressed as JPEG again (or PNG if it contains an alpha-channel, which most don't).
> 
> This patch stores the raw base64 photo data from the vcard as a QByteArray in KABC::Picture. If the photo is not changed, this QByteArray is simply used when saving the contact, so there's no recompression and quality loss. If the photo was changed it gets compressed as JPEG as before.
> 
> fixes this bug: https://bugs.kde.org/show_bug.cgi?id=307570
> 
> 
> This addresses bug 307570.
>     http://bugs.kde.org/show_bug.cgi?id=307570
> 
> 
> Diffs
> -----
> 
>   kabc/picture.h bf9745c 
>   kabc/picture.cpp 0a51c8b 
>   kabc/tests/picturetest.h 2b33e18 
>   kabc/tests/picturetest.cpp b599b48 
>   kabc/vcardtool.cpp a742788 
> 
> Diff: http://git.reviewboard.kde.org/r/106745/diff/
> 
> 
> Testing
> -------
> 
> compiled kdepimlibs/kabc with kde 4.9.2
> 
> - created a new contact in kaddressbook and added a photo. exported the contact.
> - changed the photo and exported the contact again
> - the image data in the exported file didn't change
> 
> 
> Thanks,
> 
> Sebastian Scheibner
> 
>

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