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Old 08-25-2020, 08:38 AM   #31
rashkae
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Quote:
Originally Posted by davidfor View Post
It isn't needed, unless you want it. The features of kepubs include:
  • Popup for footnotes
  • Can zoom images
  • In-book progress stats
  • Slightly faster page turning (but not fast enough that I notice it)

The features of epubs include:
  • Uses Adobe page numbering
  • Supports rendering features such as ligatures
A couple potentially really important differences I'll add that David missed:

Kepub Feature:

Kepub supports font fallback, (It will display characters that are not in your selected font by automatically falling back to a different font. Important for books that include foreign characters.)

Epub Feature:

Can correctly calculate real physical distance, so will properly display books with margins and indents defined with measures, (inches or pt).
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Old 08-25-2020, 08:53 AM   #32
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Epub Feature:

Can correctly calculate real physical distance, so will properly display books with margins and indents defined with measures, (inches or pt).
That's just cruel. Now I have to create a test case to check. And where the hell will I find a ruler?
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Old 08-25-2020, 09:03 AM   #33
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That's just cruel. Now I have to create a test case to check. And where the hell will I find a ruler?
Well, okay, I didn't measure anything to the mm, so don't crucify me with "Correctly".. but you can eyeball a test if you compare an oder, low DPI Device and a new 300DPI device, with a 1 inch indent.

Both Epub and Kepub will indent something that looks like 1 inch on the Low DPI device. On the High DPI device, the epub will still indent about 1 inch, but the Kepub indent will look like half that.


It's been my guess that the distance to pixels is hard coded in the Kepub renderer, and was calculated back when readers for 168DPI (or whatever the DPI was back then.)
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Old 08-25-2020, 09:12 AM   #34
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Well I loaded some manga onto the readers.

cbz looks great, full size images, in proportion, etc. But no zoom except "fit to width"..

kepub/epub looks terrible. Images squashed and stretched, default setting inserts headers and footers (unless you turn this off). You can zoom which is good, but images are not proportional...

Sigh.
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Old 08-25-2020, 09:17 AM   #35
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Well I loaded some manga onto the readers.

cbz looks great, full size images, in proportion, etc. But no zoom except "fit to width"..
This is not correct, cbz will have all kinds of zoom.

You can Pinch zoom.

The Four Directions icon, (you probably touched this one to see the "fit to width" had a slider that acts as a zoom

And finally, you can double tap on an image to zoom into the area you double tapped on. (use the zoom slider or double tap again to zoom back out.)

I would, however, suggest *not* using the zoom to width or zoom to height icons. They will cause the display to completely mess up if images between pages are not the same size, and it can be hard to restore without closing/re-opening the book.
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Old 08-25-2020, 09:25 AM   #36
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Quote:
Originally Posted by rashkae View Post
This is not correct, cbz will have all kinds of zoom.

You can Pinch zoom.
This was on a Mini. No pinch zoom, double tap I think.

Quote:
Originally Posted by rashkae View Post
The Four Directions icon, (you probably touched this one to see the "fit to width" had a slider that acts as a zoom

And finally, you can double tap on an image to zoom into the area you double tapped on. (use the zoom slider or double tap again to zoom back out.)
Okay, will try this but I don't think zoom slider showed up...

Maybe because Mini only runs an older firmware?
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Old 08-25-2020, 09:35 AM   #37
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Quote:
Originally Posted by Crowriver View Post
kepub/epub looks terrible. Images squashed and stretched, default setting inserts headers and footers (unless you turn this off). You can zoom which is good, but images are not proportional...
That will be the code that puts the images in the on the page. You mentioned using KCC. I thought it would do this properly, but, it has been a while since I tried it.

For the times that I need to put an image in the a book, I either do it as with an SVG wrapper with 'preserveAspectRatio="xMidYMid meet"', or an img tag with either the width or height set to auto.
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Old 08-25-2020, 09:48 AM   #38
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Originally Posted by davidfor View Post
That will be the code that puts the images in the on the page. You mentioned using KCC. I thought it would do this properly, but, it has been a while since I tried it.
I'm not using the latest version of KCC, because my Mac is not on the latest OS X.....I converted a KCC-optimised cbz (which displays perfectly on the reader) to kepub using Calibre. Maybe that's where the issue came in.
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Old 08-25-2020, 09:53 AM   #39
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Right, you said right in your first post that you were taergetting older devices, and I completely overlooked it. Sorry. Everything I chimed in so far can be disregarded,, it's been a long time since I worked with these, and I'll just get my memories jumbled trying.

As for loading manga on a mini...



Image loading in non-book formats, (cbz) used to be terrible in older kobo firmware, slow and poor quality dithering. it was improved immensely in more recent firmware, but I forget if it was late in the 3.x series or the 4.x series.
Last edited by rashkae; 08-25-2020 at 09:57 AM.
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Old 08-25-2020, 10:06 AM   #40
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Right, you said right in your first post that you were taergetting older devices, and I completely overlooked it. Sorry. Everything I chimed in so far can be disregarded,, it's been a long time since I worked with these, and I'll just get my memories jumbled trying.

As for loading manga on a mini...



Image loading in non-book formats, (cbz) used to be terrible in older kobo firmware, slow and poor quality dithering. it was improved immensely in more recent firmware, but I forget if it was late in the 3.x series or the 4.x series.
Ha ha! I know, I know.
The images did look nice but the text was.....on the small side. A Touch will probably be better for Manga reading.

I shall try and update firmware to (not officially supported) recent version and see if it helps at all. (Will do backup of existing system first).
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Old 08-25-2020, 10:44 AM   #41
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This was on a Mini. No pinch zoom, double tap I think.
I think you may want update the firmware if it's running an older version. It can run 4.23.15548. It's compatible with the Mini.

https://pgaskin.net/KoboStuff/kobofirmware.html (download kobo4 firmware and manually update)
Last edited by JSWolf; 08-25-2020 at 11:30 AM.
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Old 08-25-2020, 11:50 AM   #42
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I think you may want update the firmware if it's running an older version. It can run 4.23.15548. It's compatible with the Mini.

https://pgaskin.net/KoboStuff/kobofirmware.html (download kobo4 firmware and manually update)
Updated the firmware. Running nicely on the Mini.
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Old 08-25-2020, 02:09 PM   #43
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Updated the firmware. Running nicely on the Mini.
Happy to read that the new firmware is working well. I hope you'll have no trouble replacing the battery hen the one you've ordered has arrived.
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Old 08-25-2020, 02:11 PM   #44
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Tested the manga cbzs on my Aura and they're great: zoom no problem, fast page turns. I will check on the Mini too with latest firmware, maybe a bit small but hopefully will all function fine.
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Old 08-27-2020, 02:14 PM   #45
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Just a quick update or sitrep if you like.

Glo, plus two Touch devices loaded with books and manga.

I ditched the Mini due to battery requiring replacement, also small screen size inadequate for manga despite zoom function in latest firmware (which is great, and very good the Mini can run it). I used the plugin KoboTouchExtended (suggested by davidfor upthread) to load books from Calibre, and just dragged and dropped cbz files onto the device after optimising and processing with KCC.

I can report that family are pleased with their Kobo readers and all happily reading away.
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