[Land_Outcast]

Thanks for the detailed response, Tex.

These are books which are being digitalized for sale through the major distributors.

I mentioned SVG because some of the books have simple, or not so simple, vector graphics. Most of those which present this issue, though, have bitmap images with transparencies, not vectors.

It also sounds like you want to have "one file to rule them all", but for this particular problem, you can't.

Yes, I'm well aware. And I'd love one format to rule them all, but I know most of the time that is being naïve, heh.

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

For the time being I've been using GIFs, the result is not hideous, but it is the lowest common denominator, with the usual drawbacks that implies. By the way, I belive they do work ok in most formats, but I'm something of a newcomer in this, so please correct me if I'm wrong in my belief.

I could, realistically, call it a day and just leave it at centered jpg images with white background, no float, no transpanecy… but I like to do things the best they can be done with my current skills (or learn a thing o two and do them better), and the allotment of time for the task in question.

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).

I thought about using queries (to use a PNG when adequately rendered, otherwise use a GIF), but it would imply a lot of work, and I don't know how well supported they (queries) are across the board.