This allows building the epsonscan2 software https://support.epson.net/linux/en/epsonscan2.php as a Debian package.
I wanted to run an EPSON DS-310 on my headless Raspberry PI (a scanserver for paperless-ngx).
There are no official arm64 images and the deb files require an X server installation which I really like to avoid.
There are other backends that "support" this printer.
- epson
- epson2
- epsonds
- utsushi
I'm really not sure which one to actually use, I had success with utsushi but all in all it feels that the backends (apart from utsushi) are all pretty dated.
I finally decided to go with epsonscan2 over utsushi as the build does not consume so much memory.
I found that the epsonscan2 code already contain a define to exclude the UI component and just build the command line tooling.
The patch_cmake.diff contains a patch to the cmake files that ensure that only the correct files are compiled and linked together. Further it adds cpack to allow easy packaging.
The Makefile will download epsonscan2, untar it and patch it. The Dockerfile is used by the docker-* make targets. The dockerfile contains all build requirements. I've run this from a M1 Macbook natively (i.e., also ARM64) which works fine. Should also work from a Raspberry Pi (probably slow).
More work is required to cross compile this from x86_64.
Scanning can be done with sane-compatible software or directly via epsonscan2.
To use the latter, one requires a config that is not too easy to get right (e.g., it epsonscan2 just segfaults if certain JPEG quality settings are zero).
I ended up using the UI version to create a config as the UI checks the scanner's capabilities and shows you what you can configure.
I also found that the linux version of epsonscan2 is not as powerfull on my scanner as the MacOS counterpart, e.g., that is better at cropping a picture and e.g., allows to remove punch holes. The latter is even a setting but is not functional for me.