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Cairo - Multi-platform 2D graphics library
http://cairographics.org
What is cairo
=============
Cairo is a 2D graphics library with support for multiple output
devices. Currently supported output targets include the X Window
System, win32, and image buffers, as well as PDF, PostScript, and SVG
file output. Experimental backends include OpenGL (through glitz),
Quartz, XCB, BeOS, OS/2, and DirectFB.
Cairo is designed to produce consistent output on all output media
while taking advantage of display hardware acceleration when available
(for example, through the X Render Extension).
The cairo API provides operations similar to the drawing operators of
PostScript and PDF. Operations in cairo include stroking and filling
cubic Bézier splines, transforming and compositing translucent images,
and antialiased text rendering. All drawing operations can be
transformed by any affine transformation (scale, rotation, shear,
etc.).
Cairo has been designed to let you draw anything you want in a modern
2D graphical user interface. At the same time, the cairo API has been
designed to be as fun and easy to learn as possible. If you're not
having fun while programming with cairo, then we have failed
somewhere---let us know and we'll try to fix it next time around.
Cairo is free software and is available to be redistributed and/or
modified under the terms of either the GNU Lesser General Public
License (LGPL) version 2.1 or the Mozilla Public License (MPL) version
1.1.
Where to get more information about cairo
=========================================
The primary source of information about cairo is:
http://cairographics.org/
The latest versions of cairo can always be found at:
http://cairographics.org/download
Documentation on using cairo and frequently-asked questions:
http://cairographics.org/documentation
http://cairographics.org/FAQ
Mailing lists for contacting cairo users and developers:
http://cairographics.org/lists
Roadmap and unscheduled things to do, (please feel free to help out):
http://cairographics.org/roadmap
http://cairographics.org/todo
Dependencies
============
The set of libraries needed to compile cairo depends on which backends
are enabled when cairo is configured. Here are the dependencies for
each backend:
Surface backends:
image backend (required)
------------------------
pixman http://cairographics.org/releases
or: git://git.cairographics.org/git/pixman
glitz backend
-------------
glitz >= 0.4.4 http://freedesktop.org/Software/glitz
pdf backend
-----------
freetype >= 2.1.4 http://freetype.org
zlib http://www.gzip.org/zlib
postscript backend
------------------
freetype >= 2.1.4 http://freetype.org
zlib http://www.gzip.org/zlib
quartz backend
--------------
[*]
win32 backend
-------------
[*]
xcb backend
-----------
XCB http://xcb.freedesktop.org
xlib backend
------------
Xrender >= 0.6 http://freedesktop.org/Software/xlibs
beos backend
------------
No dependencies in itself other than an installed BeOS system, but cairo
requires a font backend. See the freetype dependency list.
os2 backend
-----------
Cairo should run on any recent version of OS/2 or eComStation, but it
requires a font backend. See the freetype dependency list. Ready to use
packages and developer dependencies are available at Netlabs:
ftp://ftp.netlabs.org/pub/cairo
Font backends:
freetype font backend
---------------------
freetype >= 2.1.4 http://freetype.org
fontconfig http://fontconfig.org
win32 font backend
------------------
[*]
atsui font backend
------------------
[*]
[*] I don't know specifically what packages might need to be
installed on a Mac OS X system to use the Quartz and ATSUI
backends. As far as win32, the situation is rather complex:
The Win32 backend should work on Windows 2000 and newer
(excluding Windows Me.) Most testing has been done on
Windows XP. While some portions of the code have been
adapted to work on older versions of Windows, considerable
work still needs to be done to get cairo running in these
environments.
Cairo can be compiled on Windows either with the GCC
toolchain (see http://www.mingw.org) or with Microsoft
Visual C++. Makefiles or project files for compiling with
MSVC are however not provided as of this release. We have
received reports that MSVC 6.0 compiles parts of cairo
incorrectly, (leading to incorrect color). MSVC 7.0 is
known to work.
Compiling
=========
See the INSTALL document for build instructions.
History
=======
Cairo was originally developed by Carl Worth <cworth@cworth.org> and
Keith Packard <keithp@keithp.com>. Many thanks are due to Lyle Ramshaw
without whose patient help our ignorance would be much more apparent.
Since the original development, many more people have contributed to
cairo. See the AUTHORS files for as complete a list as we've been able
to compile so far.
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