wumpus-core: Pure Haskell PostScript and SVG generation.
Wumpus - (W)riter (M)onad (P)ost (S)cript.
Wumpus is a kernel library for generating 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  and reasonably
efficient as the use of stack operations, i.e
grestore, is minimized.
Pictures in Wumpus are made from paths and text labels. Paths themselves are made from points. The usual affine transformations (rotations, scaling, translations) can be applied to geometric objects. 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
available that helps create certain types of diagram, but even
this lacks the higher-level stuff (polygons, arrows etc.) that
would make creating general drawings easy.
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. Text encoding an exception - I'm not sure how reasonable the design is. The current implementation appears okay for Latin 1 but may be inadequate for other character sets, so I may have to revise it significantly.
Core.BoundingBox is likely to be reworked
significantly in the future. It has too many functions that do
not offer distinct functionality. Some functions were removed in
revision 0.17.0 and some more are likely to follow.
\[1\] Because the output is simple, straight-line PostScript code, it is possible to use GraphicsMagick or a similar tool to convert Wumpus's EPS files to many other formats (bitmaps).
22.0 TO 0.23.0:
Basic.GraphicsState- extracted the font face fields from
FontAttrdatatype into a separate datatype
PtSizea numeric type wrapping Double. This is specifically for text size calculations, vis the
Changed all functions in
PtSizeinstead of a polymorphic type
uis an instance of Fractional). To get to another unit type rather than FontSize use an explicit conversion that scales the value accordingly.
Added FromPtSize class constraints to various functions in
|Versions [faq]||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|
|Dependencies||algebra (<0.1), base (<5), containers, monadLib, time (>=1.1.3 && <1.2), vector-space, wl-pprint, xml [details]|
|Copyright||Stephen Tetley <email@example.com>|
|Maintainer||Stephen Tetley <firstname.lastname@example.org>|
|Revised||Revision 1 made by HerbertValerioRiedel at Sat Nov 7 12:23:12 UTC 2015|
|Uploaded||by StephenTetley at Tue Aug 17 19:45:12 UTC 2010|
|Downloads||16512 total (214 in the last 30 days)|
|Rating||(no votes yet) [estimated by rule of succession]|
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