4 This is a high-level guide to how the cairo distribution is organized
5 and how to get started hacking on it. Make sure you read through the
6 file README before continuing.
12 The easiest way to write code in the cairo style is to follow code close
13 to the place you are hacking, but if you want a written down set of
14 rules, see file CODING_STYLE.
16 Files for backends that depend on languages other than C (C++ or
17 Objective C for example) may use features specific to those languages.
18 For example, "//" comments are allowed, though discouraged, in those files.
24 Various ways to get in touch with other cairo developers and maintainers
25 have been enumerated at:
27 http://cairographics.org/contact/
29 Most of that information is also reflected in the following sections.
35 There are various mailing lists that are useful when developing cairo
36 code. A complete list is always available at:
38 http://cairographics.org/lists/
40 It is recommended that cairo developers subscribe to all those lists.
41 The cairo list by itself generates much more traffic than the others
42 combined, so developers and contributors should not be intimidated by
43 the -commit and -bugs lists.
49 We use a standard bugzilla bug tracking system available at:
51 http://bugs.freedesktop.org/
53 See file named BUGS for detailed information on reporting bugs. In short,
54 for straight bug reports, it's best to report them there such that they
55 are not lost or forgotten. For discussion of new features or
56 complicated issues, use the mailing list.
62 It's a great idea to hang around the cairo IRC channel if you have any
63 interest in cairo. We use the #cairo channel on irc.freenode.net.
65 Make sure you introduce yourself if your nick is not easy to match to
66 the name you use on the mailing list.
69 Version Control System
70 ----------------------
72 We use /git/ for version control. See:
74 http://cairographics.org/download/
77 Add links to some git tutorials or better, right a few paragraphs
78 about how to use git to efficiently hack on cairo.
84 We use the autotools build system with cairo, but with various
85 customizations and advanced features. Reading configure.in is your
86 best bet to understanding it, or just ask on IRC.
88 To bootstrap the build system run ./autogen.sh. After that the
89 regular "./configure; make; make install" sequence can be used.
90 See file named INSTALL for more details.
92 There is limited support for a win32 build system.
93 See README.win32 and Makefile.win32 files in various directories.
99 We generate ChangeLog files automatically from the git commit log.
100 No manual ChangeLog writing is necessary.
103 Copyrights and Licensing
104 ------------------------
106 The cairo library is dual-licensed under LGPL and MPL. See file named
107 COPYING for details. The test suites are more liberal. For example,
108 GPL code is allowed in the test suites, though it's always better to
111 When writing new code, update the file headers to add your (or your
112 employers) copyright line and contributor line. If adding new files
113 or splitting a file, copy the file header from other files.
119 The library source code and headers live in the src/ directory.
120 See src/README for more information.
123 Regression Test Suite
124 ---------------------
126 Cairo has a fairly extensive regression-testing suite. Indeed, without
127 these tests it would be impossible to make a cairo release without
128 introducing tens of regressions. We still manage to introduce
129 regressions with each release even with the hundreds of tests we already
132 The regression test suite is located under the test/ directory.
133 See test/README for more information.
136 Performance Test Suite
137 ----------------------
139 There is a small performance-testing suite for cairo.
141 The performance test suite is located under the perf/ directory.
142 See perf/README for more information.
148 The cairo-boilerplate is a small private library used by the regression
149 and performance test suites. It includes the boilerplace code needed
150 to initialize various backends for the test suites, as well as allow
151 tweaking some of the internal workings of the backends for more testing.
153 The boilerplate code is localted under the boilerplate/ directory.
154 See boilerplate/README for more information.
160 Cairo uses the gtk-doc system for reference API documentation.
162 The reference documentation is located under doc/public.
163 See doc/public/README for more information.
165 For more documentation including frequently asked questions, tutorials,
166 samples, roadmap, todo list, etc visit:
168 http://cairographics.org/documentation/
170 Some of those should gradually be moved to doc/.
176 There are a few useful utilities we have developed that are either
177 useful when writing code using cairo, or writing cairo, or useful in
178 general. These tools can be found under the util/ directory.
179 See util/README for more information.
185 Now you are a cairo maintainer, so what? See file named RELEASING.