New ruby cairo binding landed in CVS

ruby-talk
1

Announcing a re spawned rcairo

rcairo.rb (1.75 KB)

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rcairo[1] is a cairo[2] extension for ruby.

Cairo is a resolution and device independent vector graphics drawing
library, which provides a postscript like drawing model. The release
contains some simple tests, and some not so simple tests utilizing
cairo through ruby (samples/canvas contains a small windowing system.

Features

  • PNG writing
  • interactive applications using gtk+ and hardware acceleration.

Download

The extension is available as a tarball[3] or from cairo CVS[4] see
the cairo cvs instructions[5] for information on how to get rcairo and
some of its dependencies from cvs. See the README[6] for spartan build
instructions, rcairo uses setup.rb and is hopefully easy to wrap up
for gems and RPA.

To be done

  • Review API/conventions.
  • patterns (for gradients, and repeating images).
  • binding of cairo-svg for svg rendering support.
  • integration with sdl extension, for easy platform independent
    (albeit not hardware accelerated) use.
  • PDF writing.
  • integration with pango extension, for unicode based text layout capabilities.
  • integration with the native support in gtk+
  • integration with other toolkits?
  • documentation

Feedback and patches are appreciated, especially regarding how cairo
code should be used from ruby. Most of the fancy things can be added
as syntactic sugar, but I am uncertain how to handle for instance
enumerated values in a good way.

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[1] - http://cairographics.org/rcairo
[2] - http://cairographics.org/ - “introduction - cairo”
[3] - http://cairographics.org/~pippin/cairo/ruby/ - “download
location for tarball”
[4] - http://cvs.cairographics.org/rcairo/ - “cairo CVS - directory
/cvs/cairo : rcairo”
[5] - http://cairographics.org/download - “download - cairo”
[6] - http://cvs.cairographics.org/rcairo/README?view=auto - “README for rcairo”

Attachments: a png file, and the ruby script used to generate it, just
to give a taste of the API, more samples exist in the release.

Happy drawing.

/Øyvind K./pippin

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