Use Cairo for high-quality bitmap, vector, and display output
Description
R graphics device using cairographics library that can be used to create
high-quality vector (PDF, PostScript and SVG) and bitmap output (PNG, JPEG,
TIFF), and high-quality rendering in displays (X11 and Win32). Since it uses
the same back-end for all output, copying across formats is WYSIWYG. Files are
created without the dependence on X11 or other external programs. This device
supports alpha channel (semi-transparent drawing) and resulting images can
contain transparent and semi-transparent regions. It is ideal for use in server
environments (file output) and as a replacement for other devices that don't
have Cairo's capabilities such as alpha support or anti-aliasing. Backends are
modular such that any subset of backends is supported.
