Harfbuzz: Recognise some common text ligatures

config.org

@@ -1902,6 +1902,21 @@ into later.
     (let ((mixed-pitch-face 'variable-pitch-serif))
       (mixed-pitch-mode (or arg 'toggle)))))
 #+end_src
+
+Now, as Harfbuzz is currently used in Emacs, we'll be missing out on the
+following Alegreya ligatures:
+#+begin_center
+ff /ff/ ffi /ffi/ ffj /ffj/ ffl /ffl/
+fft /fft/ fi /fi/ fj /fj/ ft /ft/
+Th /Th/
+#+end_center
+
+Thankfully, it isn't to hard to add these to the ~composition-function-table~.
+#+begin_src emacs-lisp
+(set-char-table-range composition-function-table ?f '(["\\(?:ff?[fijlt]\\)" 0 font-shape-gstring]))
+(set-char-table-range composition-function-table ?T '(["\\(?:Th\\)" 0 font-shape-gstring]))
+#+end_src
+
 ** Org Chef
 Loading after org seems a bit premature. Let's just load it when we try to use
 it, either by command or in a capture template.