js实现文字转gif动画代码-html代码-BFW代码库

js实现文字转gif动画代码

代码语言：html

所属分类：动画

代码描述：js实现文字转gif动画代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开


<!DOCTYPE html>
<html lang="en" >

<head>

  <meta charset="UTF-8">

  
  
<style>
body {background: #333}
</style>



</head>

<body >
  <center>
<canvas style="visibility:hidden;position:absolute" width="421" height="150"></canvas>
<textarea cols="50" rows="5">
Tutorial Blog for Stylish Blogger
</textarea><br />
<input type="button" onclick="kaki()"  value="Create GIF" />
<div id="tes"></div>
<img></img><br />
</center>
  
  
      <script>
//Original source: https://jsdo.it/jagarikin/UGE2

var canvas,ctx,nowbit,nowpin,ho,stp;

canvas = document.getElementsByTagName('canvas')[0];
ctx = canvas.getContext('2d');
    canvas.style.width = width + 'px';
    canvas.style.height = height + 'px';
ctx.fillRect(0,0,canvas.width,canvas.height);

function kaki(){
    var a,b,c;
    ctx.font="140px Beben Koben";
    ho=[];
    a=document.getElementsByTagName('textarea')[0].value;
    for(b=0;b<a.length;b++){
        if(a.charCodeAt(b)==10)continue;
        ctx.fillStyle="rgb(0,0,0)";
        ctx.fillRect(0,0,canvas.width,canvas.height);
        ctx.fillStyle="rgb(255,255,255)";
        c=ctx.measureText(a[b]).width/2;
        ctx.fillText(a[b],canvas.width/2-c,canvas.height/2+50);
        ho.push(ctx.getImageData(0,0,canvas.width,canvas.height));
    }
    stp=ho.length;
    a=a.split(/\r\n|\r|\n/);
    
    for(c=0;c<4;c++){
        ctx.fillStyle="rgb(0,0,0)";
        ctx.fillRect(0,0,canvas.width,canvas.height);
        ctx.fillStyle="rgb(255,255,255)";
        d=40-c*5;
        ctx.font=d+"px Beben Koben";
        for(b=0;b<a.length;b++){
            e=ctx.measureText(a[b]).width/2;
            ctx.fillText(a[b],canvas.width/2-e,canvas.height/2+d-a.length/2*d+b*d);
        }
        ho.push(ctx.getImageData(0,0,canvas.width,canvas.height));
    }
    cgif();
}

function cgif(){
    var a,b,c,d,e,im;
    im=ho[0];
    nowbit=0;
    a=[];
    b=[71,73,70,56,57,97];
    for(c=0;c<6;c++)putbit(a,b[c],8);
    b=im.width;
    putbit(a,b>>0 & 0xFF,8);
    putbit(a,b>>8 & 0xFF,8);
    b=im.height;
    putbit(a,b>>0 & 0xFF,8);
    putbit(a,b>>8 & 0xFF,8);
    
    putbit(a,1,1); //Common Palais
    putbit(a,7,3); //Pixel 1 dot
    putbit(a,0,1); //sort
    putbit(a,7,3); //The value obtained by adding 1 as the n in the value (0-7), the number 2 n of the common palette
    putbit(a,0,8); //Background color
    putbit(a,0,8); //Aspect ratio?
    
    for(b=0;b<256;b++){
        putbit(a,b,8);
        putbit(a,b,8);
        putbit(a,b,8);
    }
    
    //Application Extension
    putbit(a,33,8);
    putbit(a,255,8);
    putbit(a,11,8);
    b="NETSCAPE2.0";
    for(c=0;c<11;c++)putbit(a,b.charCodeAt(c),8);
    putbit(a,3,8);
    putbit(a,1,8);
    b=0; //Number of times
    putbit(a,b>>0 & 0xFF,8);
    putbit(a,b>>8 & 0xFF,8);
    putbit(a,0,8);
    
    for(b=0;b<ho.length;b++)dset(a,ho[b],b);
    putbit(a,59,8); //end
    
    b=new Uint8Array(Math.ceil(a.length/8));
    d=0;
    for(c=0;c<b.length;c++){
        for(e=0;e<8;e++){
 .........完整代码请登录后点击上方下载按钮下载查看