ctx-identity
An example of a canvas transform which doesn't alter the canvas at all (it's the identity transform). Useful as boilerplate for making real canvas transforms which do alter the canvas.
Why?
To implement a form of middleware for image manipulation. The contract is simple. Every middlware is a function that accepts a canvas and calls a callback, providing it with an error or a canvas. This makes it easy to compose various image manipulations any way you want. See imaginate, which offers an API that does exactly this.
Usage
var transform = cIdentity()
- returns (function) transform - A function that accepts a canvas and returns it as-is
Examples
javascript (browser)
const cIdentity = var canvas = document canvas { var ctx = newCanvas ...}
Node.js
const cIdentity = var Canvas = var canvas = canvas { var ctx = newCanvas ...}