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Cairo - Multi-platform 2D graphics library
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2003-05-14 18:30:57 +00:00
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Compiling
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---------
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See the INSTALL document for build instructions.
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2002-10-26 08:00:39 +00:00
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Description
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-----------
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Cairo provides anti-aliased vector-based rendering for X. Paths consist
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of line segments and cubic splines and can be rendered at any width
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with various join and cap styles. All colors may be specified with
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optional translucence (opacity/alpha) and combined using the extended
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Porter/Duff compositing algebra as found in the X Render Extension.
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Cairo exports a stateful rendering API similar in spirit to the path
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construction, text, and painting operators of PostScript, (with the
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significant addition of translucence in the imaging model). When
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complete, the API is intended to support the complete imaging model of
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PDF 1.4.
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Cairo relies on the Xc library for backend rendering. Xc provides an
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abstract interface for rendering to multiple target types. As of this
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writing, Xc allows Cairo to target X drawables as well as generic image
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buffers. Future backends such as PostScript, PDF, and perhaps OpenGL
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are currently being planned.
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Dependencies
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------------
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Cairo currently requires the following supporting libraries:
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Xc
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Xft
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fontconfig
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libic
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libpixregion
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Documentation
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-------------
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There's not much documentation yet apart from the cairo.h header
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file. We'll be correcting that shortly.
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In the meantime, the xrtest module in CVS provides a few example
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programs using Cairo. These may be helpful to a programmer just beginning
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with Cairo. Also, familiarity with the PostScript imaging model will
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help in understanding Cairo.
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History
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-------
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Cairo was developed by Carl Worth <cworth@isi.edu> and Keith Packard
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<keithp@keithp.com>. Many thanks are due to Lyle Ramshaw without whose
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patient help our ignorance would be much more apparent.
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Mailing List
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------------
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If you have trouble with Cairo or you have some ideas for how it could be
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improved, please feel free to send a message to cairo@cairographics.org
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Cairo is still under active development and all discussion happens on
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that list. So if you want to lurk or, (even better), take part in the
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development, take a look. Subscription information and archives are
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available:
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2003-07-18 11:34:19 +00:00
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http://cairographics.org/cgi-bin/mailman/listinfo/cairo
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