* This package has been released under an X Consortium-like open-source license. * The util directory includes programs to clip, rotate, scale, and position GIF images. These are no replacement for an interactive graphics editor, but they can be very useful for scripted image generation or transformation. * The library includes program-callable entry points for reading and writing GIF files, an 8x8 utility font for embedding text in GIFs, and an error handler. GIF manipulation can be done at a relatively low level by sequential I/O (which automatically does/undoes image compression) or at a higher level by slurping an entire GIF into allocated core. * This library speaks both GIF87a and GIF89. The differences between GIF87 and GIF89 are minor: in the latter, the interpretation of some extension block types is defined. * The library never needs to actually interpret these, but giftext notices them and there are functions in the API to read and modify them.

• Converting Bézier paths into vector paths. • Sorting vector paths into svp's. • Antialiased rendering of svp's. • Computation of stroke paths (with line cap and join options). • Intersection, union, and difference of svp's. • Finding covering uta's for rectangles, vector paths, and svp's. • Union of uta's. • Decomposition of uta's into minimal set of rectangles. • Alpha-compositing. • Affine transformation of paths and images.