could not determine a default font for sans-serif

[ivan-jli]

Hi folks,
I try to test a slint project on my arch linux dev machine, cross-compiling for Raspbian. Got "could not determine a default font for sans-serif". It seems like a bug, any idea for a fix / workaround?

[tronical]

Hi :). Is that an error you get during compilation or when running the cross-compiled binary on the raspberry pi?

[ivan-jli]

Hi, it's a (cross) compilation error. Forgot to mention that I have installed ttf-dejavu and fontconfig. Here the check:

fc-match sans-serif
DejaVuSans.ttf: "DejaVu Sans" "Book"

[tronical]

Thanks for the quick response. Setup wise this looks also good. Are you by any chance configuring the slint compiler to embed resources for the software renderer?

[ivan-jli]

I see now the problem I wrote about is manifesting when I use cross utility. cargo build gives linker issues. As cross uses containers, it seems I have to configure the fonts there..
“Are you by any chance configuring the slint compiler to embed resources for the software renderer?” -> can’t tell, I’m experimenting with slint since yesterday. I’ll give a clean example tomorrow.

[tronical]

Right, you need that in your container. You can also use our containers for building, that has everything you need: https://github.com/slint-ui/slint/blob/master/Cross.toml . That said, it's a little odd: The data from fontconfig should only be needed if compiling a slint file for use on micro-controllers, specifically when trying to embed glyphs.

[ivan-jli]

Many thanks tronical, it works now! https://github.com/ivan-jli/slint_demo .
Is there an easy way to get all the docs as .pdf btw?

[tronical]

Cool :)

Apologies, the docs are only online at the moment.