It is now possible to embed Servo using QT [1]. Servo is also written in Rust, as I'm sure you know. Would it be possible to replace the built in EPUB renderer with Servo's HTML/CSS engine? Yes, Servo is still in active development, but I believe for EPUBs which is just HTML/CSS Servo may be stable enough. This would provide access to various HTML & CSS features that are in the EPUBv3 specification that Plato's built-in renderer does not support yet.
Another option could be using mupdf-rs. I know you rejected using mupdf-rs instead of using your own wrapper due to concerns about binary size (in previous issue #257)
Edit: It has come to my attention MuPDF doesn't have a built in EPUB renderer. Perhaps Servo would suffice but stability might be a (big) issue.
It is now possible to embed Servo using QT [1]. Servo is also written in Rust, as I'm sure you know. Would it be possible to replace the built in EPUB renderer with Servo's HTML/CSS engine? Yes, Servo is still in active development, but I believe for EPUBs which is just HTML/CSS Servo may be stable enough. This would provide access to various HTML & CSS features that are in the EPUBv3 specification that Plato's built-in renderer does not support yet.
Another option could be using mupdf-rs. I know you rejected using mupdf-rs instead of using your own wrapper due to concerns about binary size (in previous issue #257)
Edit: It has come to my attention MuPDF doesn't have a built in EPUB renderer. Perhaps Servo would suffice but stability might be a (big) issue.
Here could be some ideas: