| ################################################# |
| otlLib: Routines for working with OpenType Layout |
| ################################################# |
| |
| The ``fontTools.otlLib`` library provides routines to help you create the |
| subtables and other data structures you need when you are editing a font's |
| ``GSUB`` and ``GPOS`` tables: substitution and positioning rules, anchors, |
| lookups, coverage tables and so on. |
| |
| ------------------------------------------ |
| High-level OpenType Layout Lookup Builders |
| ------------------------------------------ |
| |
| .. currentmodule:: fontTools.otlLib.builder |
| |
| .. autoclass:: AlternateSubstBuilder |
| .. autoclass:: ChainContextPosBuilder |
| .. autoclass:: ChainContextSubstBuilder |
| .. autoclass:: LigatureSubstBuilder |
| .. autoclass:: MultipleSubstBuilder |
| .. autoclass:: CursivePosBuilder |
| .. autoclass:: MarkBasePosBuilder |
| .. autoclass:: MarkLigPosBuilder |
| .. autoclass:: MarkMarkPosBuilder |
| .. autoclass:: ReverseChainSingleSubstBuilder |
| .. autoclass:: SingleSubstBuilder |
| .. autoclass:: ClassPairPosSubtableBuilder |
| .. autoclass:: PairPosBuilder |
| .. autoclass:: SinglePosBuilder |
| |
| -------------------------------------- |
| Common OpenType Layout Data Structures |
| -------------------------------------- |
| |
| .. currentmodule:: fontTools.otlLib.builder |
| |
| .. autofunction:: buildCoverage |
| .. autofunction:: buildLookup |
| |
| ------------------------------------ |
| Low-level GSUB Table Lookup Builders |
| ------------------------------------ |
| |
| These functions deal with the "simple" lookup types. See above for classes to |
| help build more complex lookups (contextual and chaining lookups). |
| |
| .. currentmodule:: fontTools.otlLib.builder |
| |
| .. autofunction:: buildSingleSubstSubtable |
| .. autofunction:: buildMultipleSubstSubtable |
| .. autofunction:: buildAlternateSubstSubtable |
| .. autofunction:: buildLigatureSubstSubtable |
| |
| -------------------------- |
| GPOS Shared Table Builders |
| -------------------------- |
| |
| The functions help build the `GPOS shared tables <https://docs.microsoft.com/en-us/typography/opentype/spec/gpos#shared-tables-value-record-anchor-table-and-mark-array-table>`_ |
| as defined in the OpenType spec: value records, anchors, mark arrays and |
| mark record tables. |
| |
| .. currentmodule:: fontTools.otlLib.builder |
| .. autofunction:: buildValue |
| .. autofunction:: buildAnchor |
| .. autofunction:: buildMarkArray |
| .. autofunction:: buildDevice |
| .. autofunction:: buildBaseArray |
| .. autofunction:: buildComponentRecord |
| |
| ------------------------------------ |
| Low-level GPOS Table Lookup Builders |
| ------------------------------------ |
| |
| These functions deal with the "simple" lookup types. See above for classes to |
| help build more complex lookups (contextual and chaining lookups). |
| |
| .. currentmodule:: fontTools.otlLib.builder |
| |
| .. autofunction:: buildCursivePosSubtable |
| .. autofunction:: buildLigatureArray |
| .. autofunction:: buildMarkBasePos |
| .. autofunction:: buildMarkBasePosSubtable |
| .. autofunction:: buildMarkLigPos |
| .. autofunction:: buildMarkLigPosSubtable |
| .. autofunction:: buildPairPosClassesSubtable |
| .. autofunction:: buildPairPosGlyphs |
| .. autofunction:: buildPairPosGlyphsSubtable |
| .. autofunction:: buildSinglePos |
| .. autofunction:: buildSinglePosSubtable |
| |
| ---------------------------- |
| GDEF Table Subtable Builders |
| ---------------------------- |
| |
| These functions build subtables for elements of the ``GDEF`` table. |
| |
| .. currentmodule:: fontTools.otlLib.builder |
| |
| .. autofunction:: buildAttachList |
| .. autofunction:: buildLigCaretList |
| .. autofunction:: buildMarkGlyphSetsDef |
| |
| ------------------ |
| STAT Table Builder |
| ------------------ |
| |
| .. currentmodule:: fontTools.otlLib.builder |
| |
| .. autofunction:: buildStatTable |