[Docs] Update Debian installation guide for Debian 13 (Trixie) & SwayFX 0.5.3

[reazndev]

Description

The current Debian installation instructions (INSTALL-deb.md) are outdated for users running Debian 13 (Trixie/Sid). Following the current guide leads to multiple failures regarding package names, missing dependencies for the newer wlroots backend, and version mismatches.

Issues Encountered

1. Package Name Changes: Debian Trixie uses stricter naming conventions (e.g., libgdk-pixbuf-2.0-dev instead of libgdk-pixbuf2.0-dev).
2. Missing Dependencies: The wlroots 0.19 backend requires additional libraries not currently listed, specifically liblcms2-dev, libliftoff-dev, and libdisplay-info-dev.
3. Build Method: The manual download method for dependencies is prone to version mismatch errors. The Meson Subprojects method is significantly more reliable for ensuring SwayFX 0.5.3 builds against the correct versions of SceneFX (0.4.1) and Wlroots (0.19.0).
4. Runtime Linking: The guide lacks a sudo ldconfig step, which causes the binary to fail immediately after installation with error while loading shared libraries: libscenefx.so.1.

Proposed Solution

I have successfully built and verified SwayFX 0.5.3 on a fresh Debian 13 environment using the subprojects method.

I will submit the PR shortly!

[BlockListed]

This helped me a lot. Thanks!
Just FYI, for my Debian install I also needed libgles-dev and hwdata.
Without hwdata, sway builds, but the wlroots build lacks a renderer.

[auroJimen]

Hey, I was trying to install using the updated version and kept getting dependency error on wlroots (even though it was correctly downloaded into the subprojects folder).

The thing is meson didn't fail, it just disabled wlroots and thus ninja built the project without any apparent errors and i could install. This obviously lead to being unable to boot into swayfx.

I didn't notice the meson error until then (my bad)

Anyway looking at the output of meson I saw that it was compiling scenefx before wlroots, leading to the conflict on dependencies since scenefx depends on it. I edited the meson.build file changing the compiling order and now it works. I could submit a pull request but I don't know if it makes sense for such a simple change.

I'm not sure either wether this was some weird edge case since I saw no one else asking about getting a Tried to override dependency 'wlroots-0.19' which has already been resolved or overridden at /home/auro/build/swayfx/subprojects/scenefx/meson.build:83: error

[drewgrif]

This helped me a lot. Thanks! Just FYI, for my Debian install I also needed libgles-dev and hwdata. Without hwdata, sway builds, but the wlroots build lacks a renderer.

Agreed, I had to add libegl-dev as well.

https://codeberg.org/justaguylinux/swayfx-setup in case interested