Quote:
Originally Posted by dgatwood
If fonts look distorted, my money is on the common stem values being off, resulting in bad auto-hinting. You should open it in a font editor and recalculate the common stems, the alignment zones, and all of the typographical dimensions. Then make adjustments so that the family-specific line spacing values are consistent across the entire font family (assuming the calculated values aren't already identical, which they often are).
The difference between the ascender and descender values, in particular, should always be the UPM size (em square). For example, if the ascender is 750, and the descender is -250, the UPM should be 1000. Adjust one or the other. Make sure that all three values are consistent across the entire font family.
I'm assuming you're using Libre Baskerville? Fontographer suggests 761 as the Ascender, -239 descender, 240 as the line gap. So the specified descender value of -270 is plausible, but the specified ascender value of 970 is dubious, given the UPM of 1000.
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I can now confirm this issue with Libre Baskerville on several of the Kindle devices, including PPW and K3. PPW view (this is a screenshot from Previewer just because it's easier, but it's the same on the device) attached.
Dgatwood:
I don't know if this is a stem value issue. (I'm not yet at the point where I can adapt fonts. I'm still only halfway through
Bringhurst.) Honestly, it's a bit odd that it looks fine on all other devices (Fire, HD, etc.) but goes utterly wonk on two of the e-ink KF8 devices. We'll investigate, but..I thought that the OP might want to know that our shop has just encountered this, also, just this day. We've confirmed this on real device testing, to include the Keyboardless (the K3 replacement sans Keyboard, whatever they are calling that now).
We are testing on this now; this is the first book in which we've encountered this issue for a Baskerville font. We have seen similar things with some other fonts, but this one, on this font, is new to us.
Hitch