jpeg

This is a node.js module, writen in C++, that uses libjpeg to produce a JPEG image (in memory) from a buffer of RGBA or RGB values. Since JPEG has no notion of A (alpha), the module always uses just RGB values.

It was written by Peteris Krumins ([e-mail]). His blog is at http://www.catonmat.net -- good coders code, great reuse.

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The module exports Jpeg object that takes 5 arguments in its constructor:

var png = new Jpeg(buffer, width, height, quality, buffer_type);

The first argument, buffer, is a nodee.js Buffer filled with RGBA or RGB values. The second argument is integer width of the image. The third argument is integer height of the image. The fourth argument is the quality of output image. The fifth argument is buffer type, either 'rgb' or 'rgba'.

See examples/ directory for examples.

To get it compiled, you need to have libjpeg and node installed. Then just run

node-waf configure build

to build the Jpeg module. It will produce a jpeg.node file as the module.

See also http://github.com/pkrumins/node-png module that produces PNG images.

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Have fun!

Sincerely, Peteris Krumins http://www.catonmat.net