name: wumpus-core version: 0.19.0 x-revision: 1 license: BSD3 license-file: LICENSE copyright: Stephen Tetley maintainer: Stephen Tetley 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 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. . Wumpus-core includes some extra helper modules that are not really part of the \"core\", but are otherwise currently homeless. They provide lists of named colours and /safe/ fonts, plus some prototype code (Extra.PictureLanguage) for arranging pictures. . WARNING... . The modules @Core.BoundingBox@ and @Extra.PictureLanguage@ are likely to be reworked significantly in the future. . @Core.BoundingBox@ 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. . @Extra.PictureLanguage@ needs some more thought. The current set of classes is rather cumbersome, and some of the operations would benefit new names. . NOTE... . Revision 0.17.0 added affine transformations for primitives (paths, text labels, ellipses), one consequence of this is the bounding box may be tighter for a primitive under affine transformation then lifted to a picture, than a primitive lifted to picture then transformed, i.e.: . @boundary (liftToPicture (transform PRIM)) /= boundary (transform (liftToPicture PRIM))@ . Where liftToPicture is usually @frame@ from @Wumpus.Core.Picture@. . This is because the bounding box of a transformed picture is calculated by applying the transformation to the corner points of its (previous) bounding box rather than finding the bounding box union of all the composite primitives. . GENERAL DRAWBACKS... . For actually drawing pictures, diagrams, etc. Wumpus is very low level. I\'m working on a complementary package @wumpus-extra@ with higher-level stuff (polygons, arrows etc.) but it is too unstable for Hackage. Preview releases can be found at though. . 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). . Changelog: . 0.18,0 to 0.19.0: . * Added @Transform@ type class to apply a matrix transformation directly. . * Changed the ordering of picture drawing in PostScript and SVG output so the list gets drawn from tail to head with right folds. This makes the list order of pictures match their zorder. . * Renamed the function @withinBB@ (Core.BoundingBox) to @within@. . * On many type signatures with e.g. Points, I\'ve changed the parameter name on the type constructor from @a@ to @u@. This is to indicate that @u@ is some unit - almost always a Double. e.g @Point2 a@ becomes @Point2 u@ and all the class obligations change lexically as well @Floating a =>@ to @Floating u =>@. Superficially this means a lot of type signatures have diffs but haven\'t really changed. . * Added function @bezierCircle@ to generate the Bezier curve points for arcs describing a circle. . * Added new demo - MultiPic. The PostScript it generates is efficient - no extraneous use of @concat@. . * Added wumpus_default_font constant. . 0.17.0 to 0.18.0: . * Added instances of the affine operation classes (Scale, Rotate ...) for Primitives (path, text label, ellipse). . * Added some picture composition functions to Core.Picture. These are useful for testing where the type class complications of Extra.PictureLanguage are an overhead. . * Added iRGB to Core.Colour - create RGB colours with integer components [0..255] - and iHSB, iGrey. . * Added some test modules for the affine transformations. These illustrate a quirk in Wumpus where, under affine transformation, Pictures may generate a larger bounding box than composite primitives. . * Minor change - ztextlabel changed to use 24pt type rather than 12pt. . * Corrected the cabal file to include the correct files for the manual. The Haskell source file @WorldFrame.hs@ was missing with the generated file @WorldFrame.eps@ incorrectly included instead. . . build-type: Simple stability: unstable cabal-version: >= 1.2 extra-source-files: CHANGES, LICENSE, demo/AffineTest01.hs, demo/AffineTest02.hs, demo/AffineTest03.hs, demo/AffineTest04.hs, demo/AffineTestBase.hs, demo/FontPic.hs, demo/LabelPic.hs, demo/MultiPic.hs demo/Picture.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 < 0.1 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, Wumpus.Extra.SafeFonts, Wumpus.Extra.SVGColours, Wumpus.Extra.X11Colours other-modules: Wumpus.Core.PictureInternal, Wumpus.Core.PostScript, Wumpus.Core.SVG, Wumpus.Core.OneList, Wumpus.Core.TextEncodingInternal, Wumpus.Core.Utils extensions: ghc-options: includes: