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 it is
experimental - functionality is added an dropped between
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.
\[1\] 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).
23.0 to 0.30.0:
Substantial changes - the output machinery has been heavily modified, the intention was to reduce the use of matrix transformations in SVG output. Though this goal has not been achieved, some code-size improvements in the SVG output have been made.
The code generation monads have been changed - Wumpus no longer uses a writer monad for code generation, but it will keep the Wumpus name.
Added support for hyperlinks in the SVG output.
Improved internal pretty printing and added the function
Core.Colourmodule has been simplified to support just one (new) type - RGBi, and the conversion type class
PSColourhas been eliminated.
Core.Picture- the type of the
framefunction has been changed to take a list of Primitives rather than a single Primitive. The function
frameMultiwhich previously provided this functionality has been removed. SVG hyperlinks are now supported for Primitives.
The default font size has been changed to 14 pt.
The Path datatype has been renamed PrimPath, likewise Ellipse is now PrimEllispe and Label becomes PrimLabel.
Core.Geometrynow longer defines an affine frame datatype.
Core.BoundingBoxmodule changed significantly. The corner functions (
boundaryBottomLeft, etc.) have been removed, along with the plane functions (
leftPlane, etc.). Some functions have been given more verbose names -
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 (>=0.0.0.1 && <0.1), base (<5), containers (>=0.3 && <=0.4), time (>=1.1.3 && <1.2), vector-space (>=0.6 && <1.0) [details]|
|Copyright||Stephen Tetley <firstname.lastname@example.org>|
|Maintainer||Stephen Tetley <email@example.com>|
|Revised||Revision 1 made by HerbertValerioRiedel at Sat Nov 7 12:24:13 UTC 2015|
|Uploaded||by StephenTetley at Thu Sep 2 20:29:45 UTC 2010|
|Downloads||17398 total (435 in the last 30 days)|
|Rating||(no votes yet) [estimated by rule of succession]|
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