Fix handling of combined ligatures and kerning.

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Remove hasGlyph helper and ligature tracking array.
Use single call to:
 - CFAttributedStringCreate
 - CTLineCreateWithAttributedString
and a call per bi-di/layout run to:
 - CTRunGetGlyphs for glyphs
 - CTFontGetAdvancesForGlyphs for advances
 - CTRunGetStringIndices for indices of ligatures
And an efficient loop over the substituted characters of ligatures,
to make glyph context calls for incrementing the attribute indices.

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This commit is contained in:

Mikael Sand

2018-01-02 23:17:04 +02:00

parent 17a66f3c2c

commit 4a8808b0fb

1 changed files with 469 additions and 530 deletions

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ios/Text/RNSVGTSpan.m

+469 -530

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