simulateCSSBackgroundInCanvas

在canvas中模拟css的background-size、background-position、background-repeat三个属性的部分效果。单位仅支持px、%。

使用

import drawBackgroundImageToCanvas from './index.js'

let width = 500
let height = 500
let img = '/1.jpg'
let canvas = document.createElement('canvas')
canvas.width = width
canvas.height = height
drawBackgroundImageToCanvas(ctx, width, height, img, {
  backgroundRepeat: 'repeat-y',
  backgroundSize: '60%',
  backgroundPosition: 'center center'
}, (err) => {
  if (err) {
    // 失败
  } else {
    // 成功
  }
})