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json-to-canvas

v1.1.3

Published

json-to-canvas

Downloads

12

Readme

json-to-canvas

安装

npm i json-to-canvas
# or
yarn add json-to-canvas

使用

import { json2canvas, SourceItemType } from 'json-to-canvas';
import type { Json2canvasSource } from 'json-to-canvas';

// 传递数据,绘制层级根据数组下标
const sourceArray: Json2canvasSource[] = [
    {
        type: SourceItemType.Image,
        // ...imageProps
    },
    {
        type: SourceItemType.Text,
        // ...textProps
    },
    {
        type: SourceItemType.RoundRect,
        // ...roundRectProps
    },
    {
        type: SourceItemType.Extra,
        // 只有一个 callback 返回 ctx
    }
]

json2canvas({
    canvasProps: { width: 300, height: 400 },
    scale:2,
    source:sourceArray
})
    .then(url => {
        console.log(url);
    })
    .catch(err => {
        console.error(err);
    })

API

| api | 描述 | 类型 | | :---- | :---- | :---- | | json2canvas | 通过参数获得画图数据 | (props: IJson2canvasProps) => Promise | | getTextHeight | 获取多行文本的高度 | (ctx: CanvasRenderingContext2D, props: ITextAutoBreakProps) => number | | loadImage | 加载图片 | (url: string) => Promise | | drawRoundRectPath | 绘制圆角矩形路径 | (ctx: CanvasRenderingContext2D, props: Omit<IRoundRectType, 'x' | 'y' | 'backgroundColor' | 'callback' | 'type'>) => void | | fillRoundRect | 填充圆角矩形 | (ctx: CanvasRenderingContext2D, props: Omit<IRoundRectType, 'callback' | 'type'>) => void |

更新

2021年7月23日

  • 废弃了之前的object传入sourceArray的方式
  • 现在所有的 callback 返回的参数,都是通过 scale 计算过的了
  • 优化了代码结构
  • 修改了 json2canvas 的返回值, Promise<{url: string}> =>>> Promise<string>
  • 增加了 getTextHeight 方法,以获取多行文本的高度
  • 增加了 loadImage 方法

2021年7月26日

  • 更新 md 文档

2021年08月18日

  • 优化图片跨域

2021年09月03日 (v1.0.4)

  • 图片加载失败之后,继续绘制,跳过当前失败

2021年09月28日 (v1.0.7)

  • 使用 rollup 进行打包编译
  • 优化打包后的产物,减小体积

2021年09月30日 (v1.0.8)

  • 重构代码结构

2021年11月01日 (v1.0.9)

  • 导出画圆角矩形方法 drawRoundRectPath

2021年11月02日 (v1.1.1)

  • 增加画圆角图片 ImageName.RoundImage

2021年11月12日 (v1.1.2)

  • 优化 load-image cors判断

2021年12月10日 (v1.1.3)

  • 增加 MIT 证书