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Old 05-27-2020, 10:08 PM   #2
Tex2002ans
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Posts: 2,306
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Join Date: Jul 2012
Device: Kobo Forma, Nook
What sorts of images are you working with? I assume these are purely vector drawings since you mentioned SVG as well.

And are you trying to have this as little symbols inline scaling with text? Or are they completely separate large graphics?

Back in 2013, inline SVGs were written about in "Apple symbol and other special characters in ePub".

Quote:
Originally Posted by Land_Outcast View Post
But now I see a really poor rendering of PNGs on ADE,
What's the rendering issues you're getting on ADE? I know their image scaling algorithm is garbage, but that's across the board.

In Amazon's ecosystem, transparent PNGs aren't well supported. Last I recall, they're automatically converted into JPGs. (And back in 2013, KindleGen had other transparent PNG issues.)

Quote:
Originally Posted by Land_Outcast View Post
so I thought to use SVGs (but they aren't allowed by Amazon's lastest format).
It also sounds like you want to have "one file to rule them all", but for this particular problem, you can't.

Similar to equations, there are ways to finagle SVG (with PNG fallback) into the ebook with a lot of elbow grease... but it's usually not worth it. And that comes with its own quirks/bugs (potential duplicate images).

Usually, you just go with the easiest + lowest common denominator, and make sure it works across a wide swathe of devices instead.

If you want to put in the extra work, you'd most likely have to create completely separate books:

- one for EPUB with SVGs and/or transparent PNGs
- one for MOBI with non-transparent bitmap images

Quote:
Originally Posted by Land_Outcast View Post
Does anyone have a suggestion on what to do about it?
And is this for personal use? Or are you trying to sell this ebook?

If you're designing this for something like the MR Library, then no problems. Go with SVG and/or Transparent PNGs in your EPUB. I believe Calibre even converts transparent PNGs to Kindle formats fine.

If going for sale though.... probably strongly recommend against it.

Last edited by Tex2002ans; 05-27-2020 at 10:10 PM.
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