WebAssembly port of Cairo - Multi-platform 2D graphics library with support for multiple output devices and consistent rendering.
Cairo is a 2D graphics library with support for multiple output devices. Currently supported output targets include the X Window System (via both Xlib and XCB), quartz, win32, and image buffers, as well as PDF, PostScript, and SVG file output.
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.
The primary source of information about cairo is its website:
The latest versions of cairo can always be found at:
Documentation on using cairo and frequently-asked questions:
Mailing lists for contacting cairo users and developers:
Roadmap and unscheduled things to do, (please feel free to help out):
The set of libraries needed to compile cairo depends on which backends are enabled when cairo is configured. So look at the list below to determine which dependencies are needed for the backends of interest.
For the surface backends, we have both "supported" and "experimental" backends. Further, the supported backends can be divided into the "standard" backends which can be easily built on any platform, and the "platform" backends which depend on some underlying platform-specific system, (such as the X Window System or some other window system).
As an example, for a standard Linux build similar to what's shipped by your distro, (with image, png, pdf, PostScript, svg, and xlib surface backends, and the freetype font backend), the following sample commands will install necessary dependencies:
-
Debian (and similar):
apt-get build-dep cairo
-
Fedora (and similar):
dnf builddep cairo
Technically you probably don't need pixman from the distribution since if you're manually compiling Cairo you probably want an updated pixman as well. However, if you follow the default settings and install pixman to /usr/local, your Cairo build should properly use it in preference to the system pixman.
- pixman >= 0.30.0
- none
- Xrender >= 0.6
- macOS >= 10.4 with Xcode >= 2.5
- Microsoft Windows Vista or newer.
- freetype >= 2.1.9
- fontconfig
- MacOS X >= 10.4 with Xcode >= 2.5
- Microsoft Windows Vista or newer
- Microsoft Windows 7 or newer
See the INSTALL document for build instructions.
Cairo is released under the terms of either the GNU Lesser General Public License version 2.1, or the terms of the Mozilla Public License version 1.1.
See the COPYING document for more information.
Cairo was originally developed by Carl Worth [email protected] and Keith Packard [email protected]. 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 document for as complete a list as we've been
able to compile so far.
This WebAssembly port is part of a larger effort to bring professional desktop applications to browsers with native performance.
👨💻 About the Maintainer: Isaac Johnston (@superstructor) - Building foundational browser-native computing infrastructure through systematic C/C++ to WebAssembly porting.
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