penguin would shrink the result to fit its screen. >I declared A5 and Letter paper, media type stationery, and an output bin called face-up.

You can (and should!) define exact dimensions of your screen in `media-size-supported`. It will probably be a non-standard IPP name, that's why you should define that in `media-supported` as `om_NNNmmxYYYmm` or `oe_NNNinxYYYin`

That way you don't need to scale the incoming data, the PC will format it exactly to the dimensions of the screen.

Both PWG Raster and Apple Raster support 1-bit-per-pixel mode (instead of 8-bit-per-pixel you use), that's why the input could be 8 times less in size. Use `print-color-mode-{supported,default}=bi-level` instead of `monochrome` for that. And also tune `urf-supported`'s `W` option, use `W1` for this case.

The screen/dithering could be ass in 1-bit mode, see https://github.com/OpenPrinting/libcupsfilters/pull/160 where I added more dithering options (Linux-only though, Apple seems to abandon their CUPS).

One of the great things about having an open platform like the Xteink is that it should uncover loads of novel and unsatisfied use cases. Eg, this could be paired with a mobile phone to act as a secondary display much better suited to outdoor applications in bright sunlight.

[1] https://github.com/cristobaltapia/dpt-rp1-cups

Regarding the size of the page being sent to the printer, I remember reading that printers used to be postscript interpreters and the result of that program would be the page.

Perhaps that would trade ram for compute, but might be more complex in the end.

https://djvu.sourceforge.net/

If you like e-ink device reviews this is an artsy channel think small leather notebooks https://www.youtube.com/watch?v=-oOqFUuULOk

For me my favorite is the RM2 but I keep selling/buying it back due to poor financial decisions but I love how it writes and long battery, plus hackable, never paid for a subscription. It is an extra device too so unfortunately not used that often I spend most of my time in front of a desktop but have multiple laptops too/drawing tablets.

Just open pdf on mac, hit print, grab a kindle and there it is (yes, I know, we can do send to kindle, and some time later, when Jeff Bezos allows so, the doc might appear).

The author "prints" to the eink display. Why not load say the pdf directly?