diagrams-pgf is a PGF backend for diagrams. Diagrams is a powerful, flexible, declarative domain-specific language for creating vector graphics, using the Haskell programming language.
PGF is a TeX macro package for generating graphics. It is platform- and format-independent and works together with the most important TeX backend drivers, including pdftex and dvips.
diagrams-pgf is a work in progress, it supports the basic features of diagrams with the following features:
- LaTeX, ConTeXt and plain TeX support
- direct PDF generation using a TeX distribution (e.g. texlive) via texrunner.
A simple example that uses diagrams-pgf to draw a square.
import Diagrams.Prelude
import Diagrams.Backend.PGF.CmdLine
b1 = square 20 # lwG 0.05
main = defaultMain (pad 1.1 b1)Save this to file named square.hs and compile this program:
ghc --make square.hs
This will generate an executable which, when run produces a TeX (or PDF) file. Run the
executable with the --help option to find out more about how to call it.
$ ./square --help
square
Usage: square [-?|--help] [-w|--width WIDTH] [-h|--height HEIGHT]
[-o|--output OUTPUT] [-f|--format FORMAT] [-a|--standalone]
[-r|--readable] [-l|--loop] [-s|--src ARG]
[-i|--interval INTERVAL]
Command-line diagram generation.
Available options:
-?,--help Show this help text
-w,--width WIDTH Desired WIDTH of the output image
-h,--height HEIGHT Desired HEIGHT of the output image
-o,--output OUTPUT OUTPUT file
-f,--format FORMAT l for LaTeX, c for ConTeXt, p for plain
TeX (default: LaTeX)
-a,--standalone Produce standalone .tex output
-r,--readable Indent lines
-l,--loop Run in a self-recompiling loop
-s,--src ARG Source file to watch
-i,--interval INTERVAL When running in a loop, check for changes every
INTERVAL seconds.
If no output file is given, output is send to stdout. Supported outputs are .tex and .pdf. PDF generation is done using texrunner.
$ ./Square -o square.tex
$ cat ./square.tex
\begin{pgfpicture}
\pgfpathrectangle{\pgfpointorigin}{\pgfqpoint{22.0000px}{22.0000px}}
\pgfusepath{use as bounding box}
\begin{pgfscope}
\begin{pgfscope}
\pgfpathmoveto{\pgfqpoint{21.0000px}{1.0000px}}
\pgfpathlineto{\pgfqpoint{21.0000px}{21.0000px}}
\pgfpathlineto{\pgfqpoint{1.0000px}{21.0000px}}
\pgfpathlineto{\pgfqpoint{1.0000px}{1.0000px}}
\pgfpathlineto{\pgfqpoint{21.0000px}{1.0000px}}
\pgfpathclose
\definecolor{sc}{rgb}{0.0000,0.0000,0.0000}
\pgfsetstrokecolor{sc}
\pgfsetlinewidth{0.0132mm}
\pgfusepath{stroke}
\end{pgfscope}
\end{pgfscope}
\end{pgfpicture}
pgf-diagrams allows typesetting TeX commands and can calculate the corresponding envelope. See the hbox example to see how get envelopes of text:
The following features are not currently supported:
- selecting fonts (italic and bold work)
- gradients
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