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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.
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11 changed files with 246 additions and 47 deletions
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@ -64,7 +64,7 @@ pub enum PagePx {}
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// See https://bugzilla.mozilla.org/show_bug.cgi?id=177805 for more info.
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//
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// FIXME: Implement Au using Length and ScaleFactor instead of a custom type.
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#[deriving(Clone, PartialEq, PartialOrd, Eq, Ord, Zero)]
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#[deriving(Clone, Hash, PartialEq, PartialOrd, Eq, Ord, Zero)]
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pub struct Au(pub i32);
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impl Default for Au {
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