The wumpus-core package

[Tags:bsd3, library]

Wumpus is a low-level library for generating static 2D vector pictures, its salient feature is portability due to no FFI dependencies. It can generate PostScript (EPS) files and SVG files. The generated PostScript code is plain [1] and reasonably efficient as the use of stack operations, i.e gsave and grestore, is minimized.

Wumpus makes pictures from paths and text labels. Paths themselves are made from points. The usual affine transformations (rotations, scaling, translations) can be applied to Pictures. Unlike PostScript there is no notion of a current point, Wumpus builds pictures in a coordinate-free style.


For actually drawing pictures, diagrams, etc. Wumpus is very low-level. There is a supplemantary package wumpus-basic available that helps create certain types of diagram, but it is experimental - functionality is added and dropped between releases, it has no stable API.

Some of the design decisions made for wumpus-core are not sophisticated (e.g. how attributes like colour are handled, and how the bounding boxes of text labels are calculated), so Wumpus might be limited compared to other systems. However, the design permits a fairly simple implementation, which is a priority.

[1] Because the output is simple, straight-line PostScript code, it is possible to use GraphicsMagick or a similar tool to convert EPS files generated by Wumpus to many other formats (bitmaps).


There are two major changes between 0.35.0 and 0.36.0.

PrimElement has been removed and the grouping constructor it provided has been moved into the Primitive type. As both types are opaque, definitions in client code will work without change, but all type signatures referencing PrimElement will need to replace PrimElement with Primitive.

Rotations and scalings on Primitives have changed again. Primitives are now instances of the affine classes so support - rotate, rotateAbout, scale, translate. Primitives are now considered to be in the implicit affine frame with origin at (0,0). Previously rotatation on Primitives (via the function rotatePrim) was really a special case to allow slanted text, the rotation was about the text's baseline origin and not the affine frame. As rotation now works differently there is a special constructor for slanted text rtextlabel.


0.35.0 to 0.36.0:


Versions 0.12.0, 0.13.0, 0.13.1, 0.14.0, 0.15.0, 0.16.0, 0.17.0, 0.18.0, 0.19.0, 0.20.0, 0.21.0, 0.22.0, 0.23.0, 0.30.0, 0.31.0, 0.32.0, 0.33.0, 0.34.0, 0.35.0, 0.36.0, 0.37.0, 0.40.0, 0.41.0, 0.42.0, 0.42.1, 0.43.0, 0.50.0, 0.51.0, 0.52.0, 0.52.1
Change log CHANGES
Dependencies base (<4.5), containers (>=0.3 && <=0.4), time (>=1.1.3 && <1.2), vector-space (>=0.6 && <1.0) [details]
License BSD3
Copyright Stephen Tetley <>
Maintainer Stephen Tetley <>
Stability unstable
Category Graphics
Home page
Uploaded Wed Oct 13 19:39:00 UTC 2010 by StephenTetley
Updated Sat Nov 7 11:44:52 UTC 2015 by HerbertValerioRiedel to revision 1
Distributions NixOS:0.52.1
Downloads 5352 total (11 in the last 30 days)
0 []
Status Docs uploaded by user
Build status unknown [no reports yet]




Maintainer's Corner

For package maintainers and hackage trustees