Change font size in Yaft

[wtraylor]

It seems that Yaft currently has its glyphs hardcoded in glyph.h, with a pixel size of 16×32 per glyph.

For the sake of legibility and accessibility a larger font size would be great.

Would it be possible to create generate different glyph sets (larger ones) and switch between them with a configuration parameter?

[shawnh-git]

Config options would be ideal but I'd be happy with just instructions on how to recompile it with a larger font if options aren't possible.

[timower]

I agree, I won't have time to implement this soon though. For compiling with your own fonts, it's been a while, but this guide from the original upstream yaft should still work: https://uobikiemukot.github.io/yaft/#how-to-use-your-favorite-fonts

[mimuki]

I was able to confirm that recompiling with fonts generated as per the above link works great :)

Here's a walkthrough of the steps I took since I had some troubles (and maybe other people will as well), but keep in mind I'm a hobbyist who doesn't know what they're doing, so some of these steps may be bad form.

• make sure you're using cmake >= version 3.19. debian 12's is too old, for example.
• run which cmake and take note of what it says for later
• install the right version of the remarkable toolchain for your device version ( https://remarkable.guide/devel/toolchains.html#installer )
• once installed, source it (at the end of the installer it'll tell you the command you need)
• clone the non-remarkable yaft repo ( https://github.com/uobikiemukot/yaft )
• generate your font with a command like ./mkfont_bdf table/alias path/to/your/bdf > glyph.h
• clone the repo with remarkable yaft in it ( https://github.com/timower/rM2-stuff )
• copy your glyph.h you generated to vendor/libYaft/glyph.h [ you might not need to do this next step, but I did! ]
• edit the CMakePresets.json so that under the dev preset, CMAKE_BUILD_WITH_INSTALL_RPATH is set to true
• the version of cmake in the remarkable toolchain is too old, so for all of these commands, replace cmake with the path to cmake you wrote down before:

  cmake --preset dev cmake --build build/dev --target yaft

• if all went well, copy the build/dev/apps/yaft/yaft file to your remarkable (e.g. scp build/dev/apps/yaft/yaft root@10.11.99.1:/home/root/, or however you like to copy your files)
• for testing, see if it works by running env LD_PRELOAD=/opt/lib/librm2fb_client.so.1.0.1; path/to/yaft- if you see your terminal with the font you picked, it probably works!
• i have yet to learn the "proper" way to install it so it appears in your launcher, but do that (i bodged it by editing /etc/draft/yaft.draft to point to my yaft instead)
• hopefully, success?