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Old 01-18-2019, 01:23 PM   #16
DNSB
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kepub is ALWAYS a better choice than epub on Kobo devices. Use Calibre for the conversion
I would strongly disagree. Both have advantages, both have oddities.
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Old 01-18-2019, 04:12 PM   #17
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Quote:
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kepub is ALWAYS a better choice than epub on Kobo devices. Use Calibre for the conversion
i disagree also... natural epub is always better for me. but as DNSB said "Both have advantages, both have oddities."
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Old 01-19-2019, 03:53 AM   #18
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Epub has a best rendering (ligatures) but no notes and no imagine enlargement.

Kepub has no ligatures but as pop up notes and imagine enlargement with double tap.

I use Kepub if there are notes or imagine and Epub otherwise.
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Old 01-21-2019, 10:05 AM   #19
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If you're someone that uses text-renderingptimizeLegibility, forces left alignment and disables hyphenation, are there any typographical advantages to using epubs?
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Old 01-21-2019, 12:18 PM   #20
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I used for some time "text-rendering optimize Legibility" in patch, but I encountered spacing issues (in a word every 2 or 3 pages there was too much space between letters). Then I tried "optimize speed" but now I use default settings in Kepub: kerning but no ligatures, and it works (I found that font Merryweather is fantastic also without ligatures).

This is the main drawback with Kepub in standard Kobo engine (the other is that when a note is too long You can't see it completely in pop up).

I would like to have ligatures in Kepub with Nickel without problems, I am perplexed about the lack of this feature. Now I often use KOReader to read Kepub, and also, of course, to read pdf.

Quote:
Originally Posted by JeanPierre View Post
If you're someone that uses text-renderingptimizeLegibility, forces left alignment and disables hyphenation, are there any typographical advantages to using epubs?
The answer is NO, left alignment will solve spacing issues, I don't know if disabling hyphenation makes a difference...

Last edited by ps67; 01-21-2019 at 12:28 PM.
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Old 01-21-2019, 12:32 PM   #21
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Thank you for your answers. I haven't found any issues with spacing when forcing left alignment yet, which I have always done because I believe that this is optimal for reading quickly, along with no hyphenation.

I only recently discovered that patch which allows for optimised text rendering, and I love what a difference it makes. I use Literata, which I find to be a very pleasant font, and particularly appreciate the non-slanted italic variant. The difference with kerning enabled is very obvious with words such as "York" or "Written".

I would be prepared to experiment with the epub format if there were further typographical benefits to using it within the parameters I've stated: left alignment and disabled hyphenation. I have not yet accumulated sufficient experience with the optimised legibility setting enabled by geek1011's fantastic patch system to be aware of what those might be though.

I must reiterate, I really appreciate how great this forum and community is as a resource for learning how to optimise my device. If not for this thread I wouldn't have investigated a mechanism for enabling kerning for Literata in kepubs. I feel like I just got another free device upgrade
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Old 01-21-2019, 02:13 PM   #22
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Kerning should be just enabled, if You have to disable it with "optimizeSpeed". As stated in patch comments it solves some rendering problems for fully justified text, but I am not able to understand which problems.

And "optimizeLegibility" enables ligatures but creates additional rendering problems on fully justified text, as I experienced. I like ligatures but not so much to prefer them compared to a proper rendering of the text (I don't like left alignment, apart poetry, of course). But may be that "optimizeLegibility" enables also some better kerning, I don't know.

Last edited by ps67; 01-21-2019 at 02:24 PM.
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Old 01-22-2019, 01:51 AM   #23
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Ah ok, so the difference I am seeing is due to enabling ligatures. I hadn't realised that things such as "Yo", "Wa", and "fi" were covered by this Thank you for the clarification

Edit - I just looked at Literata-Regular.ttf in FontForge, and under the View -> Combinations menu it appears to display only two ligatures: one for fl and one for fi. The rest of the changes I see on my Kobo appear to be covered by what is a ridiculously long list called "Kern Pairs". I don't know what this means with respect to "optimizeLegibility".

Anyway. Typography looks better now. That's the main thing

Last edited by JeanPierre; 01-22-2019 at 02:05 AM.
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Old 01-22-2019, 12:03 PM   #24
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May be, I am not so skilled, when I open font forge I immediately give up.
I only read comments on patch.
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Old 01-22-2019, 01:06 PM   #25
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@JeanPierre, @ps67,

In case you're interested this old kepub vs. epub thread (post #19 onwards) has some discussion about "optimizeLegibility" and "optimizeSpeed".
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Old 01-22-2019, 01:40 PM   #26
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