[camiloeferrera]

GNOME Shell 51 removed Shell.GLSLEffect and Clutter.ShaderEffect.set_shader_source(), which breaks the extension on 51 (see #317):

TypeError: class heritage (intermediate value).GLSLEffect is not an object or null

This ports all three shader effects to the 51 API and declares support:

• radialShader.js — extends Clutter.ShaderEffect, builds the fragment pipeline in vfunc_get_static_snippet() with Cogl.Snippet.new(), and sets uniforms by name via set_uniform_float(name, n_components, values).
• color_effect.js / glitch_effect.js — replaces the removed set_shader_source() with vfunc_get_static_snippet() (declarations / main() body split from the existing .glsl files).
• metadata.json — shell-version: ["51"].

Credit: the approach and the color/glitch port follow the reference patch and test evidence posted by @LavaTiger99 in #318. Thanks also to @gonwe for the initial radial shader port there. Opening this as a PR because the code in #318 as it stands uses new Cogl.Snippet(...) and set_uniform_value('brightness', <number>), both of which throw on the final GNOME 51 introspected API (Cogl.Snippet.new() is the introspectable constructor, and set_uniform_float() takes exactly (name, n_components, values) — the array length is consumed automatically).

Testing

CachyOS, GNOME Shell 51.0 / Mutter 51.0, Wayland (upgraded from 50):

• Extension loads and enables with no JS errors (previously failed with the GLSLEffect TypeError above).
• Switcher opens with window previews and background shading; next/previous navigation and activation verified (Alt-Tab end-to-end).
• Radial effect construction validated in an isolated headless GNOME 51 session: vfunc_get_static_snippet() + named uniforms run clean, no GJS warnings.
• Color/glitch: not exercised end-to-end by me; the port follows the reference patch validated in Fix radial shader compatibility with GNOME Shell 51 #318.

Note: this is intentionally a GNOME 51-only port — get_static_snippet does not exist in mutter 50, and set_shader_source no longer exists in 51, so preserving 50 support would require a runtime version check with both code paths. Glad to adjust if you'd prefer that.

[Neo-29]

This works , tested on arch

[dsheeler]

Hi @camiloeferrera, @gonwe, and @LavaTiger99: thanks so much for the work on getting the gl effects sorted out for GNOME 51. I will do a bit more testing, but if all goes well, I will merge this PR which incorporates all of your efforts. Thank you!!!

[dsheeler]

This works , tested on arch

Thanks @Neo-29 for testing!

[Uchangeth]

This works , tested on Bazzite 45