An analysis of a gif file and weird gif features #Graphics

The gif file format was created in 1987 by CompuServe. Back in 1987 gif was a rather compact format! It used compression, and not just any compression, but LZW compression. Many older file formats (some made by CompuServe) used RLE (Run Length Encoding) which in many cases isn’t nearly as efficient. One of the big win factors for gif was its solid compression ratio and good color gamut for the time (a full 256 colors).

Two years later an addendum to the gif file format was created (gif89a) which added many of the features we know today.

Darrien’s technical blog digs into the gif spec and shows there is a lot more to the spec and how using some of them might confuse image renderers.


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