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117 lines
3.7 KiB
Plaintext
117 lines
3.7 KiB
Plaintext
Pixman is a library that provides low-level pixel manipulation
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features such as image compositing and trapezoid rasterization.
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Questions, bug reports and patches should be directed to the pixman
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mailing list:
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http://lists.freedesktop.org/mailman/listinfo/pixman
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You can also file bugs at
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https://bugs.freedesktop.org/enter_bug.cgi?product=pixman
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For real time discussions about pixman, feel free to join the IRC
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channels #cairo and #xorg-devel on the FreeNode IRC network.
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Contributing
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------------
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In order to contribute to pixman, you will need a working knowledge of
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the git version control system. For a quick getting started guide,
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there is the "Everyday Git With 20 Commands Or So guide"
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http://www.kernel.org/pub/software/scm/git/docs/everyday.html
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from the Git homepage. For more in depth git documentation, see the
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resources on the Git community documentation page:
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http://git-scm.com/documentation
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Pixman uses the infrastructure from the freedesktop.org umbrella
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project. For instructions about how to use the git service on
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freedesktop.org, see:
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http://www.freedesktop.org/wiki/Infrastructure/git/Developers
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The Pixman master repository can be found at:
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git://anongit.freedesktop.org/git/pixman
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and browsed on the web here:
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http://cgit.freedesktop.org/pixman/
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Sending patches
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---------------
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The general workflow for sending patches is to first make sure that
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git can send mail on your system. Then,
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- create a branch off of master in your local git repository
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- make your changes as one or more commits
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- use the
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git send-email
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command to send the patch series to pixman@lists.freedesktop.org.
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In order for your patches to be accepted, please consider the
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following guidelines:
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- This link:
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http://www.kernel.org/pub/software/scm/git/docs/user-manual.html#patch-series
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describes how what a good patch series is, and to create one with
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git.
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- At each point in the series, pixman should compile and the test
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suite should pass.
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The exception here is if you are changing the test suite to
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demonstrate a bug. In this case, make one commit that makes the
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test suite fail due to the bug, and then another commit that fixes
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the bug.
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You can run the test suite with
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make check
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It will take around two minutes to run on a modern PC.
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- Follow the coding style described in the CODING_STYLE file
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- For bug fixes, include an update to the test suite to make sure
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the bug doesn't reappear.
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- For new features, add tests of the feature to the test
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suite. Also, add a program demonstrating the new feature to the
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demos/ directory.
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- Write descriptive commit messages. Useful information to include:
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- Benchmark results, before and after
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- Description of the bug that was fixed
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- Detailed rationale for any new API
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- Alternative approaches that were rejected (and why they
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don't work)
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- If review comments were incorporated, a brief version
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history describing what those changes were.
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- For big patch series, send an introductory email with an overall
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description of the patch series, including benchmarks and
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motivation. Each commit message should still be descriptive and
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include enough information to understand why this particular commit
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was necessary.
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Pixman has high standards for code quality and so almost everybody
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should expect to have the first versions of their patches rejected.
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If you think that the reviewers are wrong about something, or that the
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guidelines above are wrong, feel free to discuss the issue on the
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list. The purpose of the guidelines and code review is to ensure high
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code quality; it is not an exercise in compliance.
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