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@cobinhood/react-native-canvas

v0.1.24

Published

<div align="center"> <img src="https://emojipedia-us.s3.amazonaws.com/thumbs/240/apple/96/fireworks_1f386.png"/> <h1>react-native-canvas</h1> </div>

Downloads

16

Readme

A Canvas component for React Native

npm install react-native-canvas

Usage

import React, { Component } from 'react';
import Canvas from 'react-native-canvas';

class App extends Component {

  handleCanvas = (canvas) => {
    const ctx = canvas.getContext('2d');
    ctx.fillStyle = 'purple';
    ctx.fillRect(0, 0, 100, 100);
  }

  render() {
    return (
      <Canvas ref={this.handleCanvas}/>
    )
  }
}

API

Canvas

Canvas#height

Reflects the height of the canvas in pixels

Canvas#width

Reflects the width of the canvas in pixels

Canvas#getContext()

Returns a canvas rendering context. Currently only supports 2d context.

Canvas#toDataURL()

Returns a Promise that resolves to DataURL.

CanvasRenderingContext2D

Standard CanvasRenderingContext2D. MDN. Only difference is await should be used to retrieve values from methods.

const ctx = canvas.getContext('2d');

Image

WebView Image constructor. Unlike in the browsers accepts canvas as first argument. MDN

const image = new Image(canvas, height, width);