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## org.apache.fop.complexscripts.fonts
Interface GlyphSubstitution

All Known Implementing Classes:
  GlyphSubstitutionSubtable

    public interface GlyphSubstitution

The `GlyphSubstitution` interface is implemented by a glyph substitution subtable that supports the determination of glyph substitution information based on script and language of the corresponding character content.

This work was originally authored by Glenn Adams (gadams@apache.org).

Method Summary
`boolean` | `substitute(GlyphSubstitutionState ss)` Perform glyph substitution at the current index, mutating the substitution state object as required.

Method Detail

### substitute

    boolean substitute(GlyphSubstitutionState ss)

  Perform glyph substitution at the current index, mutating the substitution state object as required. Only the context associated with the current index is processed.

  Parameters:
    `ss` - glyph substitution state object
  Returns:
    true if the glyph subtable was applied, meaning that the current context matches the associated input context glyph coverage table

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