graphics/quirc 1.0p0 OpenBSD

Quirc is a library for extracting and decoding QR codes from images. It has several features which make it a good choice for this purpose:

* It is fast enough to be used with realtime video: extracting and decoding from VGA frame takes about 50 ms on a modern x86 core.

* It has a robust and tolerant recognition algorithm. It can correctly recognise and decode QR codes which are rotated and/or oblique to the camera. It can also distinguish and decode multiple codes within the same image.

* It is easy to use, with a simple API described in a single commented header file (see below for an overview).

* It is small and easily embeddable, with no dependencies other than standard C functions.

* It has a very small memory footprint: one byte per image pixel, plus a few kB per decoder object.

* It uses no global mutable state, and is safe to use in a multithreaded application.

* BSD-licensed, with almost no restrictions regarding use and/or modification.