setBidiLevels(_:forGlyphRange:)

Declaration

func setBidiLevels(_ levels: UnsafePointer<UInt8>!, forGlyphRange glyphRange: NSRange)

Parameters

• levels:

  Values in levels can range from 0 to 61 as defined by Unicode Standard Annex #9.

• glyphRange:

  The range of glyphs for which the bidirectional text levels are desired.

Discussion

A subclass can override this method to interact with custom glyph storage.

See Also

Interfacing with Glyph Storage

• characterRange(forGlyphRange:actualGlyphRange:)
• glyphRange(forCharacterRange:actualCharacterRange:)
• setAttachmentSize(_:forGlyphRange:)
• setDrawsOutsideLineFragment(_:forGlyphRange:)
• setLineFragmentRect(_:forGlyphRange:usedRect:baselineOffset:)
• setLocation(_:withAdvancements:forStartOfGlyphRange:)
• setNotShownAttribute(_:forGlyphRange:)