Pixman is a low-level software library for pixel manipulation, providing features such as image compositing and trapezoid rasterization. Important users of pixman are the cairo graphics library and the X server.
Pixman is implemented as a library in the C programming language. It runs on many platforms, including Linux, BSD Derivatives, MacOS X, and Windows.
Pixman is free and open source software. It is available to be redistributed and/or modified under the terms of the MIT license.
There is a mailing list at http://lists.freedesktop.org/mailman/listinfo/pixman
Please send bug reports and patches here.
Stable releases are available from http://cairographics.org/releases/
Development snapshots are available at http://cairographics.org/snapshots/
The git development repository of pixman is available at https://gitlab.freedesktop.org/pixman/pixman.
There is currently no documentation besides the source code itself. Questions about using pixman are welcome on the mailing list as well as on the #cairo IRC channel on FreeNode.