Re: Ligature support

[Lars Ingebrigtsen]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> Sending all words to harfbuzz is probably the right solution in a
> variable-pitch font buffer anyway (to get proper kerning), but it
> probably doesn't make that much sense in a monospace-font buffer.

The space-based thing was wrong, but here's another stab at testing the
speed.

(dolist (c (append (number-sequence ?A ?Z)
                   (number-sequence ?a ?z)))
  (aset composition-function-table
        c
        (list (vector (concat (string c) "[^ \n\t]+") 0 #'font-shape-gstring))))

Without:

With:

So that fixes the kerning (this is with the proportional Deja Vu font).
And with that, scrolling through xdisp.c is 30% slower.

-- 
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   bloggy blog: http://lars.ingebrigtsen.no