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Monthly Downloads: 657
Programming language: Haskell
License: BSD 3-clause "New" or "Revised" License
Tags: Graphics    
Latest version: v0.7.1

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README

blank-canvas Hackage version Build Status

Background

blank-canvas is a Haskell binding to the complete HTML5 Canvas API. blank-canvas allows Haskell users to write, in Haskell, interactive images onto their web browsers. blank-canvas gives the user a single full-window canvas, and provides many well-documented functions for rendering images.

First Example

{-# LANGUAGE OverloadedStrings #-}
module Main where

import Graphics.Blank                     -- import the blank canvas

main = blankCanvas 3000 $ \ context -> do -- start blank canvas on port 3000
        send context $ do                 -- send commands to this specific context
                moveTo(50,50)
                lineTo(200,100)
                lineWidth 10
                strokeStyle "red"
                stroke()                  -- this draws the ink into the canvas

Running this program, and going to http://localhost:3000/ gives

images/Red_Line.png

For more details about this example, see Red Line.

Documentation

Link Notes
Examples Various complete examples of using blank-canvas
Installation How to install blank-canvas
Hackage Current release is 0.5
API Discussion of API, compared with the original JavaScript API
Canvas Examples Transliterated from http://www.html5canvastutorials.com/ into Haskell and blank-canvas, with kind permission of Eric Rowell, author of the JavaScript HTML5 Canvas Tutorial.
FAQ F.A.Q.

Credits

Thank you to Eric Rowell, for allowing blank-canvas to base our Canvas examples on his JavaScript Canvas examples.

The "Haskell" picture is taken by Mandy Lackey, from link <http://www.flickr.com/photos/77649176@N00/3776224595/.> This picture allows sharing, under the creative commons license.


*Note that all licence references and agreements mentioned in the blank-canvas README section above are relevant to that project's source code only.