gfx: Implement letter-spacing per CSS 2.1 § 16.4.

The ligature disabling code has been manually verified, but I was unable
to reftest it. (The only way I could think of would be to create an
Ahem-like font with a ligature table, but that would be an awful lot of
work.)

Near as I can tell, the method used to apply the spacing (manually
inserting extra advance post-shaping) matches Gecko.
This commit is contained in:
Patrick Walton 2014-12-10 14:00:12 -08:00
parent 758d79fff4
commit 07bc97e3e2
11 changed files with 246 additions and 47 deletions

View file

@ -193,3 +193,4 @@ fragment=top != ../html/acid2.html acid2_ref.html
== text_transform_capitalize_a.html text_transform_capitalize_ref.html
== outlines_simple_a.html outlines_simple_ref.html
== outlines_wrap_a.html outlines_wrap_ref.html
== letter_spacing_a.html letter_spacing_ref.html