wumpus-core-0.21.0: wumpus-core.cabal
name: wumpus-core
version: 0.21.0
license: BSD3
license-file: LICENSE
copyright: Stephen Tetley <stephen.tetley@gmail.com>
maintainer: Stephen Tetley <stephen.tetley@gmail.com>
homepage: http://code.google.com/p/copperbox/
category: Graphics
synopsis: Pure Haskell PostScript and SVG generation.
description:
.
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 [1] and reasonably
efficient as the use of stack operations, i.e @gsave@ and
@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.
.
GENERAL DRAWBACKS...
.
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 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.
.
WARNING...
.
The module @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.
.
The module @Extra.PictureLanguage@ is deprecated. At some point
it will be superceded by @wumpus-basic@ but this will not be soon.
.
.
\[1\] 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).
.
Changelog:
.
0.20.0 to 0.21.0:
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* Removed the instances of the Affine transformation. They have
been replaced with special transformation functions:
@rotatePrimitive@, @scalePrimitive@, @translatePrimitive@.
As Primitives are not in an affine frame until they are lifted
to Pictures the affine instances had ill-conceived semantics.
.
* Due to changes to accommodate the new non-affine
transformations, many of the class obligations have changed
on the @unit@ of Pictures, Primitives, Bounding Boxes etc.
Generally many class contexts that previously required
Fractional and Ord on the unit have changed to Real and
Floating.
.
* Removed demo/AffineTest04.hs - there is no longer a
@rotateAbout@ operation on Primitives as they do not exist
in an affine frame until they they are lifted to Pictures.
Added - Scaled.hs, Rotated.hs, Translated,hs.
.
* Removed the UndecidableInstances pragma from
Core.PictureInternal. It looks like Core.Geometry will always
need UndecidableInstances though.
.
* Removed the Ord superclass constriant from the @Stroke@ and
@Fill@ classes and derived operations (e.g. @zostroke@).
.
.
build-type: Simple
stability: unstable
cabal-version: >= 1.2
extra-source-files:
CHANGES,
LICENSE,
demo/AffineTest01.hs,
demo/AffineTest02.hs,
demo/AffineTest03.hs,
demo/AffineTestBase.hs,
demo/LabelPic.hs,
demo/MultiPic.hs
demo/Picture.hs,
demo/Rotated.hs
demo/Scaled.hs
demo/Translated.hs
doc/Guide.pdf,
doc-src/Guide.lhs,
doc-src/Makefile,
doc-src/WorldFrame.hs
library
hs-source-dirs: src
build-depends: base < 5, containers,
time >= 1.1.3 && < 1.2,
wl-pprint, vector-space,
monadLib, xml, algebra
exposed-modules:
Wumpus.Core,
Wumpus.Core.AffineTrans,
Wumpus.Core.BoundingBox,
Wumpus.Core.Colour,
Wumpus.Core.FontSize,
Wumpus.Core.Geometry,
Wumpus.Core.GraphicsState,
Wumpus.Core.OutputPostScript,
Wumpus.Core.OutputSVG,
Wumpus.Core.Picture,
Wumpus.Core.TextEncoder,
Wumpus.Core.TextLatin1,
Wumpus.Core.VersionNumber,
Wumpus.Core.WumpusTypes,
Wumpus.Extra.PictureLanguage
other-modules:
Wumpus.Core.PictureInternal,
Wumpus.Core.PostScript,
Wumpus.Core.SVG,
Wumpus.Core.OneList,
Wumpus.Core.TextEncodingInternal,
Wumpus.Core.Utils
extensions:
ghc-options:
includes: