The cairo:font-options-t structure is an opaque structure holding all options that are used when rendering fonts. Individual features of a cairo:font-options-t instance can be set or accessed using accessor functions named cairo:font-options-feature-name, like the cairo:font-options-antialias function.

New features may be added to a cairo:font-options-t structure in the future. For this reason, the cairo:font-options-copy, cairo:font-options-equal, cairo:font-options-merge, and cairo:font-options-hash functions should be used to copy, check for equality, merge, or compute a hash value of cairo:font-options-t instances.