Cairo 1.18.0 (release) The first stable cairo release in five years should be cause for celebration. All the API added in the 1.17 development cycle is now considered stable, and will not change. Many thanks to all the contributors for this release. The cairo-sphinx tool has been removed; we could not find any instruction on how to use it, and no user answered our call for help. If you were using cairo-sphinx, please reach out to the cairo maintainers. Cairo now implements Type 3 color fonts for PDF. Thanks to Adrian Johnson for his work on this feature. Khaled Hosny contributed multiple documentation fixes, to ensure that the cairo API reference is up to date. Khaled also fixed multiple compiler warnings generated when building cairo. The XML surface has been removed; it was disabled by default when building cairo, and we could not find any downstream distributor that would enable it. The Tee surface is now automatically enabled. Downstream distributors of cairo have been enabling for years it in order to build Firefox. Fujii Hironori and Adrian Johnson fixed multiple issues with the DWrite font backend. John Ralls improved the Quartz surface; mainly, Quartz surfaces now use the main display ColorSpace, speeding up rendering operations. Cairo now hides all private symbols by default on every platform; the old "slim" symbols hack to alias internally used symbols has been dropped, in favor of using `-Bsymbolic-functions` with toolchains that support it. Uli Schlachter fixed multiple memory leaks in the code base and test suite, and helped with many reviews and general maintenance. Marc Jeanmougin added new API to expose the Pixman dithering filter to cairo patterns; this is currently implemented only for image surfaces.