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资源说明：Pure Ruby analyzer of the GIF image format.
Gif Info ======== **gif-info** is analyzer of the [GIF image format][1]. It performs complete analysis of internal GIF block structure and streams it as an "object stream" with metainformations of each block. Also can *interpret* internal structure by providing the simple object-like interface to base image file informations. Works above all seekable IO streams, so allows processing of the big files too. Doesn't perform [LZW][2] decompressing, returns raw data for both color tables and images. Two different approaches are available: **sequential** and **static**. First one yields "stream" of objects which are equivalent to functional blocks in the GIF file and which contain low-level GIF data. It's equivalent of for example [SAX][3] parser although, of sure, less complex. The other one provides classical single object-like access to interpreted file informations. Examples of both are available in the `bin` directory. `git-info` command writes out content of the static information object, `git-dump` dumps content of low level blocks stream. Modifiing the file and writing changes back is possible (see [StructFx][5] library documentation). It isn't implemented directly by this library, but should be easy to implement it if you will need it -- with exception of data blocks as comments or image data -- it's necessary split them to blocks manually in your writing routine. Other structures provided by the library contains binary serialization routines implicitly. Copyright --------- Copyright © 2011 – 2016 [Martin Poljak][7]. See `LICENSE.txt` for further details. [1]: http://www.matthewflickinger.com/lab/whatsinagif/ [2]: https://en.wikipedia.org/wiki/LZW [3]: https://en.wikipedia.org/wiki/Simple_API_for_XML [4]: https://en.wikipedia.org/wiki/Document_Object_Model [5]: https://github.com/martinkozak/struct-fx [6]: https://github.com/martinkozak/gif-info/issues [7]: https://www.martinpoljak.net/
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