diagrams-canvas

HTML5 canvas backend for diagrams drawing EDSL

http://projects.haskell.org/diagrams/

Version on this page:	1.4.1
LTS Haskell 24.0:	1.4.2@rev:2
Stackage Nightly 2025-07-15:	1.4.2@rev:2
Latest on Hackage:	1.4.2@rev:2

See all snapshots diagrams-canvas appears in

BSD-3-Clause licensed by Jeffrey Rosenbluth, Ryan Yates, Brent Yorgey, Andy Gill, Daniel Bergey

Maintained by [email protected]

This version can be pinned in stack with:diagrams-canvas-1.4.1@sha256:bb4707ade5d7c79f93c34c959cce57ced9fa582ff7e1f28698afe915c57b318d,1840

Module documentation for 1.4.1

Diagrams
- Diagrams.Backend
  - Diagrams.Backend.Canvas
    - Diagrams.Backend.Canvas.CmdLine

Depends on 13 packages(full list with versions):

base, blank-canvas, cmdargs, containers, data-default-class, diagrams-core, diagrams-lib, lens, mtl, NumInstances, optparse-applicative, statestack, text

diagrams-canvas

diagrams-canvas is a canvas backend for diagrams based on the blank-canvas https://github.com/ku-fpg/blank-canvas package. Diagrams is a powerful, flexible, declarative domain-specific language for creating vector graphics, using the Haskell programming language. It supports most features defined in diagrams-lib.

Installation

cabal update && cabal install diagrams-canvas

Usage

A simple example that uses diagrams-canvas to draw a square.

import Diagrams.Prelude
import Diagrams.Backend.Canvas.CmdLine

b1 = (square 20 :: Diagram B) # lw 0.002

main = mainWith (pad 1.1 b1)

Save this to file named Square.hs and compile this program:

ghc --make -threaded Square.hs

This will generate an executable which, when run dispays the resulting diagrams to http://localhost:3000/

$ ./Square -w 750

Changes

v1.4.1 (2018-05-09)

allow base-4.11
allow lens-4.16
Add Semigroup (Render Canvas V2 Double) instance

v1.4r1 (Hackage revision)

allow base-4.10
allow optparse-applicative-0.14

v1.4 (2016-10-26)

allow lens-4.15
allow diagrams-core-1.4
allow diagrams-lib-1.4

v1.3.0.7 (2016-08-22)

require optparse-applicative-0.13 and fix compilation error

v1.3.0.6 (2016-08-16)

allow optparse-applicative-0.13

v1.3.0.5(2016-06-16)

allow base-4.9
allow data-default-class-0.1
drop support for GHC 7.6
test on GHC 8.0.1

v1.3.0.4(2016-05-01)

allow lens-4.14

v1.3.0.3 (2016-01-14)

Allow blank-canvas-0.6

v1.3.0.2 (2015-07-19)

Full Changelog

v1.3.0.1 (2015-05-26)

Full Changelog

1.3 (19 April 2015)

release to coincide with 1.3

v0.3.0.4 (2015-04-03)

Full Changelog

v0.3.0.3 (2015-01-13)

Full Changelog

v0.3.0.2 (2014-11-17)

Full Changelog

Closed issues:

Building with HEAD gives the error “local access only” at localhost:3000 #10

Merged pull requests:

typos in comments #14 (ggreif)
Bump lens upper version bounds #13 (RyanGlScott)
New Stuff x #12 (jeffreyrosenbluth)
Diagram B #11 (jeffreyrosenbluth)

v0.3.0.1 (2014-10-08)

Full Changelog

Closed issues:

API blank canvas change #7

Merged pull requests:

Bump NumInstances upper version bounds #9 (RyanGlScott)
port to linear #6 (jeffreyrosenbluth)

v0.3 (2014-09-19)

Full Changelog

Closed issues:

Does not support optparse-applicative-0.10 #4

Merged pull requests:

Using new version of blank canvas #8 (andygill)

v0.2.0.3 (2014-09-11)

Full Changelog

Merged pull requests:

Bump text upper version bounds #5 (RyanGlScott)

v0.2.0.2 (2014-09-07)

Full Changelog

v0.2.0.1 (2014-08-22)

Full Changelog

v0.2 (2014-07-08)

Closed issues:

Text with Local font size has incorrect vertical alignment. #1

Merged pull requests:

Apply accumulated uniform scaling to text size #3 (bergey)
Update .cabal version bounds #2 (bergey)

* This Change Log was automatically generated by github_changelog_generator