# insertGlyphs(_:length:forStartingGlyphAt:characterIndex:) Inserts the given glyphs into the glyph cache at the given index and maps them to characters beginning at the given character index. ``` func insertGlyphs(_ glyphs: UnsafePointer, length: Int, forStartingGlyphAt glyphIndex: Int, characterIndex charIndex: Int) ``` ## Parameters `glyphs` The glyphs to insert. `length` The number of glyphs to insert. `glyphIndex` The index in the glyph cache to begin inserting glyphs. `charIndex` Index of first character to be mapped. ## Discussion This method is part of the `NSGlyphStorage` protocol, for use by the glyph generator. It enables bulk insertion of glyphs into the glyph cache. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)