Monthly Downloads: 40
Programming language: Haskell
License: BSD 3-clause "New" or "Revised" License
Tags: Graphics     Diagrams    
Latest version: v1.4.1

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PGF diagrams backend

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

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
  \pgfusepath{use as bounding box}


pgf-diagrams allows typesetting TeX commands and can calculate the corresponding envelope. See the [hbox example] to see how get envelopes of text:


Missing features

The following features are not currently supported:

  • selecting fonts (italic and bold work)
  • gradients