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mot-plugin-apng

v0.2.0

Published

该插件可以单独使用也可搭配 mot 库使用 需要浏览器支持以下四种能力

Downloads

5

Readme

说明

该插件可以单独使用也可搭配 mot 库使用 需要浏览器支持以下四种能力

单独使用

import APNG from "mot-plugin-apng";
let apng = new APNG();

集成在 mot 库中使用

正在开发 💦

API

isSupport

用途:浏览器是否支持 apng 参数:无 返回:promise

apng
  .isSupport()
  .then(() => {
    console.log("not support");
  })
  .catch(() => {
    console.log("support");
  });

animateImage(img,autoplay,independent)

用途:将 apng 解析成 canvas 提供控制器

  • 参数 1 img :HTMLImgElement 需要解析的 img dom 元素
  • 参数 2 autoplay :boolean 是否自动播放
  • 参数 3 independent :boolean 是否需要独立控制器 >> 当检测到相同 url 地址时 为了性能 默认会共用一个控制器增加 canvas 上下文,当设置为 true 是 会为当前项独立新增一个控制器

返回:promise anim

var image1 = document.querySelector(".apng-image1");
apng.animateImage(image1, false).then((anim) => {
  anim.play([50, 70]);
  anim.before((ctx, f) => {
    ctx.fillStyle = "red";
    ctx.fillRect(0, 0, 100 + f * 3, 100 + f * 3);
  });
  anim.after((ctx, f) => {
    ctx.fillStyle = "blue";
    ctx.fillRect(200, 200, 100 + f * 3, 100 + f * 3);
  });
});

anim 控制器-属性

| 参数名 | 数据类型 | 用途 | | ------ | -------- | ------------------- | | width | number | 当前 canvas 宽度 px | | height | number | 当前 canvas 高度 px |

anim 控制器-方法

anim.play(frameArray)

用途:控制播放

  • 参数 1 frameArray: [start,end]数组 表示播放的帧数范围,只有 start 的时候播放至结尾

anim.stop()

用途:停止播放

anim.clear()

用途:清除内容

anim.start()

用途:搭配 pause 暂停使用,重新开始播放

anim.pause(frame)

用途:暂停播放

  • 参数 1 frame:当 frame 存在时,到达 frame 帧数时暂停播放

anim.setOptions({playNum,rate})

用途:设置选项

| 参数名 | 数据类型 | 用途 | 默认值 | | ------- | -------- | -------- | --------------- | | playNum | number | 播放次数 | 0:表示循环播放 | | rate | number | 播放速率 | 1 |

anim.before(func)

用途:表示在 apng 之前渲染

  • 参数 1 func: 要执行的函数 暴露两个参数 context:canvas 上下文 f:当前帧数

anim.after()

用途:表示在 apng 之后渲染

  • 参数 1 func: 要执行的函数 暴露两个参数 context:canvas 上下文 f:当前帧数

anim.on(hook,callback)

用途:状态监听

| 参数名 | 数据类型 | 用途 | 默认值 | | -------- | -------- | --------------------------------------- | ------ | | hook | string | 监听的状态 目前只开放了'stop','allStop' | | | callback | function | 回调函数 stop 时触发回调 | |

anim.once(hook,callback)

用途:一次性状态监听

| 参数名 | 数据类型 | 用途 | 默认值 | | -------- | -------- | --------------------------------------- | ------ | | hook | string | 监听的状态 目前只开放了'stop','allStop' | | | callback | function | 回调函数 stop 时触发回调 | |