1 Pixman is a library that provides low-level pixel manipulation
2 features such as image compositing and trapezoid rasterization.
4 Questions, bug reports and patches should be directed to the pixman
7 http://lists.freedesktop.org/mailman/listinfo/pixman
9 You can also file bugs at
11 https://bugs.freedesktop.org/enter_bug.cgi?product=pixman
13 For real time discussions about pixman, feel free to join the IRC
14 channels #cairo and #xorg-devel on the FreeNode IRC network.
20 In order to contribute to pixman, you will need a working knowledge of
21 the git version control system. For a quick getting started guide,
22 there is the "Everyday Git With 20 Commands Or So guide"
24 http://www.kernel.org/pub/software/scm/git/docs/everyday.html
26 from the Git homepage. For more in depth git documentation, see the
27 resources on the Git community documentation page:
29 http://git-scm.com/documentation
31 Pixman uses the infrastructure from the freedesktop.org umbrella
32 project. For instructions about how to use the git service on
35 http://www.freedesktop.org/wiki/Infrastructure/git/Developers
37 The Pixman master repository can be found at:
39 git://anongit.freedesktop.org/git/pixman
41 and browsed on the web here:
43 http://cgit.freedesktop.org/pixman/
49 The general workflow for sending patches is to first make sure that
50 git can send mail on your system. Then,
52 - create a branch off of master in your local git repository
54 - make your changes as one or more commits
60 command to send the patch series to pixman@lists.freedesktop.org.
62 In order for your patches to be accepted, please consider the
67 http://www.kernel.org/pub/software/scm/git/docs/user-manual.html#patch-series
69 describes how what a good patch series is, and to create one with
72 - At each point in the series, pixman should compile and the test
75 The exception here is if you are changing the test suite to
76 demonstrate a bug. In this case, make one commit that makes the
77 test suite fail due to the bug, and then another commit that fixes
80 You can run the test suite with
84 It will take around two minutes to run on a modern PC.
86 - Follow the coding style described in the CODING_STYLE file
88 - For bug fixes, include an update to the test suite to make sure
89 the bug doesn't reappear.
91 - For new features, add tests of the feature to the test
92 suite. Also, add a program demonstrating the new feature to the
95 - Write descriptive commit messages. Useful information to include:
96 - Benchmark results, before and after
97 - Description of the bug that was fixed
98 - Detailed rationale for any new API
99 - Alternative approaches that were rejected (and why they
101 - If review comments were incorporated, a brief version
102 history describing what those changes were.
104 - For big patch series, send an introductory email with an overall
105 description of the patch series, including benchmarks and
106 motivation. Each commit message should still be descriptive and
107 include enough information to understand why this particular commit
110 Pixman has high standards for code quality and so almost everybody
111 should expect to have the first versions of their patches rejected.
113 If you think that the reviewers are wrong about something, or that the
114 guidelines above are wrong, feel free to discuss the issue on the
115 list. The purpose of the guidelines and code review is to ensure high
116 code quality; it is not an exercise in compliance.