[chalkboard] Annotations not showing up on PDF printout

[SapinMalin]

When loading a presentation with a saved 'chalkboard.json' file, I can see the annotations in presentation mode, but not in PDF-Export mode (adding ?print-pdf to the URL)...

Originally posted by @SapinMalin in #95 (comment)

[rajgoel]

Thanks for reporting this issue. Apparently, there was a bigger problem with compatibility to reveal.js 4. I just pushed a fix 8127033 that hopefully resolves this issue. Would be nice if you can check whether it works for you as well. Note that only drawings on the chalkboard are added to the printout, drawings on the slides are ignored.

[SapinMalin]

Hi. Yes, your fix seems to work in my setting: the chalkboard slides are added to the printout! As you mention, the drawings on the slides are still absent, but I assume that fixing this is your next goal...

[rajgoel]

Thanks for testing.

Actually, ignoring drawings on slides is an intended behaviour for me and I have no plans of including them.

However, I would be open to pull requests implementing such a feature. Implementation could be very similar to printouts for chalkboard drawings, however, the canvas needs to be put on top of the slides with the correct scaling. Also this should be made an optional behaviour.

[SapinMalin]

Then you can update this thread into a feature request, please. Being able to print the drawings on the slides without relying on print screens would be the most useful for me, since I use fillable slides for teaching. Thanks a lot!