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web-canvas-poster

v1.0.2

Published

通过 canvas 组合文字,图片,并转换 canvas 到图片, 图片特性:支持圆角直角,并行下载,生成速度更快 文字特性:支持颜色字体大小等设置

Downloads

3

Readme

简介

通过 canvas 组合文字,图片,并转换 canvas 到图片, 图片特性:支持圆角直角,并行下载,生成速度更快 文字特性:支持颜色字体大小等设置

demo

样例

安装

npm install web-canvas-poster

or

yarn add web-canvas-poster

用法

const options={}
const element={}
const elements=[]
new CanvasPoster(options).render(elements).then( (base64,ctx,canvas) => {} )

options

| 参数名 | 类型 | 释义 | 默认值 | | ------- | ---- | -------- | ------ | | canvasW | int | 画布宽度 | 无 | | canvasH | int | 画布高度 | 无 | | scale | int | 缩放系数 | 1 |

例如海报类,UI 一般按照 750/375 尺寸设计,canvasW 和 canvasH 可以直接填写标注的尺寸 有时候会遇到生成图片不清晰问题,这里可以试着加大 scale

element

| 参数名 | 类型 | 释义 | 备注 | | ------- | --------------------------------------- | ----------------------------- | ---------- | | type | CanvasPoster.Image | CanvasPoster.Text | 元素类型 | 无 | | x | int | x 坐标 | 无 | | y | int | y 坐标 | 无 | | height | int | 高度 | Image 仅有 | | width | int | 宽度 | Image 仅有 | | content | string|url | 图片为 url,文字为文字 string | 无 | | config | object | 各自配置 | 无 |

type=CanvasPoster.Image

config={
    radius
}

type=CanvasPoster.Text

config={
    color,
    fontStyle,
    fontVariant,
    fontWeight,
    fontSize,
    fontFamily
}

base64

合成图的 base64 格式,可以直接用于 img 标签

ctx

合成图的 canvas context

canvas

合成图的 canvas 对象