Add GLSL language support

config.org

@@ -692,6 +692,49 @@
      (add-hook 'zig-mode-hook #'lsp-deferred)
    #+end_src
 
+** GLSL
+   Firstly, =glsl-mode= provides basic support:
+
+   #+begin_src emacs-lisp
+     (use-package glsl-mode)
+   #+end_src
+
+   It's a C-like language, so I want =bsd= code style and
+   =smart-tabs=. The former is easy:
+
+    #+begin_src emacs-lisp
+      (add-hook 'glsl-mode-hook
+                (lambda ()
+                  (c-set-style "bsd")
+                  (setq c-basic-offset 4)))
+    #+end_src
+
+   Since =smart-tabs= doesn't support GLSL out of the box, we need to
+   add support with [[help:smart-tabs-add-language-support][smart-tabs-add-language-support]]. There's an
+   example of how to use it on [[https://www.emacswiki.org/emacs/SmartTabs#h5o-5][Emacs Wiki]]:
+
+   #+begin_src emacs-lisp :tangle no
+     (smart-tabs-add-language-support c++ c++-mode-hook
+       ((c-indent-line . c-basic-offset)
+        (c-indent-region . c-basic-offset)))
+   #+end_src
+
+   [[help:c-indent-line][c-indent-line]] et al will do fine for GLSL too since its syntax is
+   very similar to C's, so adding support for it looks very similar to
+   that example:
+
+   #+begin_src emacs-lisp
+     (smart-tabs-add-language-support glsl glsl-mode-hook
+       ((c-indent-line . c-basic-offset)
+        (c-indent-region . c-basic-offset)))
+   #+end_src
+
+   Now that support is added, [[help:smart-tabs-insinuate][smart-tabs-insinuate]] should do its job:
+
+   #+begin_src emacs-lisp
+     (smart-tabs-insinuate 'glsl)
+   #+end_src
+
 * Tool Integrations
 ** Docker
    I use docker quite a lot, unfortunately, so it's nice to be able to