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Old 08-31-2016, 12:39 PM   #271
davidfor
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The fix for this as been checked in and merged. It should be in the next release.
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Old 08-31-2016, 01:27 PM   #272
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Thank you very much, I'll check it when I install the last release.
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Old 09-04-2016, 04:10 AM   #273
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The fix for this as been checked in and merged. It should be in the next release.
Checked in the new release and it works fine, thank you very much.
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Old 03-01-2017, 11:50 AM   #274
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Hi david,

I first posted in the KoboTouchExtended thread, but jgoguen suggested to ask you.
So, I copy and complete my message here :

Using the plugin KoboUtilities, I collect shelves informations in my library from one of my Kobo readers.
So in the column 'Collection' I have the shelf (or shelves) for each book.
For some books, they are in more than one shelf (ie ToRead and SF), this results in the column Collection by "ToRead, SF" (separator is comma followed by space)

In the KoboTouchExtended plugin (2.8.2), I assigned the same column (Collection).
Idem in the KoboTouch plugin (2.3.3)
When I transfer books in another Kobo Reader (after creation of all the shelves), all the books affected to only one shelf are in on the reader. That's fine.
But, for the books assigned to 2 or more shelves they aren't in any shelf. I suppose the plugin try to affect the book to one shelf called "ToRead, SF" to keep the same example instead of affect it to the 2 shelves.

Is it possible to 'fix' this in a future version of the plugin. Or, is there any existing solution ?
Hope you'll understand my english.

Thanks.

EDIT : I confirm the creation of a shelf named "ToRead, SF" instead of store the book in the 2 shelves "ToRead" and "SF"

Last edited by Mingyar; 03-01-2017 at 04:37 PM.
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Old 03-01-2017, 07:33 PM   #275
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The problem is the column type you are fetching the collections into. The column you are using is probably a text column. When collections are created from these, the value in the column is used as the collection name. What you probably want to use is a tag-like column. These are displayed as a comma separated list. The collection management treats each of these as separate values and creates a collection for each.

The fix for this is to create a tag-like custom column. Then use search and replace in calibre to copy the values from your existing column to the new column. I'm pretty sure this will split the values at the commas. Then change the driver configuration to use the new column. After this, the next time you connect the device, the driver will redo the collections using this column and they should be how you want them.
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Old 03-01-2017, 09:52 PM   #276
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Thanks David !
It works as I wished.
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Old 07-08-2018, 08:32 PM   #277
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Err, 3 years late, but I finally ported my dithering patch to the 'new' codebase .

No longer needs to patch C code thanks to @kovidgoyal's work .
Especially glad about that bit, because I utterly failed at making Qt5 give me anything I'd have liked (i.e., dithering ).

To make it perfect, we'd basically need Nickel to switch to PNG and to stop doing crappy processing/rescaling when it's not needed, so, probably as good as it's going to get .

EDIT: Crazy 3 AM test seems to point to the fact that Nickel does indeed handle those files being saved as PNG... Yum!

EDIT²: Yup, works fine, looks much better . Might even be pixel-perfect for the sleep cover on devices where there's no hidden pixels... (But as I have an H2O, sadly, that's not me, there's still stupid scaling involved because of these 11px on top...).

Last edited by NiLuJe; 07-08-2018 at 11:47 PM.
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Old 07-09-2018, 10:02 AM   #278
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Quote:
Originally Posted by NiLuJe View Post
Err, 3 years late, but I finally ported my dithering patch to the 'new' codebase .

No longer needs to patch C code thanks to @kovidgoyal's work .
Especially glad about that bit, because I utterly failed at making Qt5 give me anything I'd have liked (i.e., dithering ).

To make it perfect, we'd basically need Nickel to switch to PNG and to stop doing crappy processing/rescaling when it's not needed, so, probably as good as it's going to get .

EDIT: Crazy 3 AM test seems to point to the fact that Nickel does indeed handle those files being saved as PNG... Yum!

EDIT²: Yup, works fine, looks much better . Might even be pixel-perfect for the sleep cover on devices where there's no hidden pixels... (But as I have an H2O, sadly, that's not me, there's still stupid scaling involved because of these 11px on top...).
Hi NiLuJe,

Did you test your prototype on fw 4.9.11311/11314? The reason I ask is that 'something bad' happened to screensaver display in this latest firmware.

If I open any .kobo-images/xxx - N3_FULL.parsed file in IrfanView on the PC, the grayscale dithering looks OK to me.

As I outlined in this recent short thread (post #15 onward), prior to fw 4.9.11311/11314, regarding grayscale banding, the screensavers looked very good on KA1, pretty good on H2O and pretty bad on GloHD/ClaraHD.

fw 4.9.11311/11314 seems to be an "equal opportunity" release. Grayscale banding is now equally bad on all 4 devices. The screensaver .parsed images were all in situ before the fw upgrade and have not changed.
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Old 07-09-2018, 10:12 AM   #279
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I'm on 4.9.11314 (on a H2O), yeah.

I'll read through your thread, and double-check how the top 11px are handled now, compared to how that was done before (a quick glance yesterday told me *something* was still done, but I didn't have time to figure out exactly what).

I'm also using the larger Home/Library covers patches, which I realize is now probably counter-productive with this, since it potentially forces another layer of crappy scaling on top of now-dithered content, which is not that great...
I'll have to ditch those and see if that hunch is correct, too . (Although, admittedly, I care much more about sleep covers that Home/Library thumbnails).

EDIT²: Okay, turns out they're still shown smaller than the resolution of the thumbnails, so, patches are unlikely to change anything, we're always gonna suffer from a downscaling effect there.

EDIT: Okay, quick question for you: for what I gather, you were essentially doing what I'm doing with the "letterbox" option here, except with a dynamic median color instead of black bars, right? Were you also using dithering, or just a full grayscale?
If dithering, was it "automatic" dithering (i.e., palette selection done by the image processing), or a fixed palette?
Were you computing the median before or after the dithering step?
And, if dithering, PNG or JPG?

From what I remember of my experiments doing exactly this on Kindle, waaaaay back in the day, you had to do things in a certain order not to wreck everything (I'd say: remap + dithering -> median -> letterbox, so that the letterboxing uses a color that's on the palette, instead of computing a potential "new" one, which can happen if dithering wasn't done with a fixed palette).

As the state of the ScreenSavers hack attests to today, I personally settled on simple black bars, I was never quite satisfied with the dynamic colors approach. It sometimes looked somewhat better, but it sometimes looked alien. Black bars have the advantage of never being really terrible . It was certainly interesting to experiment with, though .

Last edited by NiLuJe; 07-09-2018 at 01:11 PM.
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Old 07-09-2018, 10:46 AM   #280
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Joy: Cropping the 11 px myself, letterboxing + dithering yields a pixel-perfect result: Nickel doesn't do any more processing, it properly uses my 1080x1429 (the *actual* effective resolution of an H2O) image without any processing.

Since it's PNG & dithered to the right palette: no banding at all, and no extra processing means all that work is not mangled by Nickel .

Maybe that'll give an incentive for people to actually figure out the exact amount of hidden pixels on their devices, and where they are, because I seem to have been the only one to care so much about that so far .

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Old 07-09-2018, 11:06 AM   #281
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Originally Posted by NiLuJe View Post
EDIT: Okay, quick question for you: for what I gather, you were essentially doing what I'm doing with the "letterbox" option here, except with a dynamic median color instead of black bars, right? Were you also using dithering, or just a full grayscale?
If dithering, was it "automatic" dithering (i.e., palette selection done by the image processing), or a fixed palette?
Were you computing the median before or after the dithering step?
And, if dithering, PNG or JPG?
Will PM you shortly. Thanks for quick response
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