想自己做个把图片转换为字符画的小软件，原理就是根据图片的每个像素的灰度，转成不同的字符。
所以研究起点阵字库了。
- HTML code
<html>
<head>
<title></title>
<script language="javascript" type="text/javascript">
//ASCII点阵字库.
var fontData=[
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x01,0xE0,0x01,0xE0,0x01,0xE0,0x01,0xE0,0x01,0xE0,0x01,0xE0,0x01,0xE0,0x00,0xC0,
0x00,0xC0,0x00,0xC0,0x00,0xC0,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x0F,0xE0,0x1C,0x70,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x1C,0x70,
0x0F,0xE0,0x0F,0xE0,0x3C,0x78,0x38,0x38,0x70,0x1C,0x70,0x1C,0x70,0x1C,0x70,0x1C,
0x78,0x3C,0x3C,0x78,0x1F,0xF0,0x07,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
];
//转换一个字节为线段.
function getBitLine(data){
var dots=0;
var line="";
var bit=1;
for(var i=0;i<8;i++){
if(bit&data){
line="■"+line;
dots++;
}
else{
line=" "+line;
}
bit=bit<<1;
}
return {dots:dots,line:line};
}
window.onload=function(){
var lines=[];
var dots=0;
var char=32; //字库数据太多，帖子发不了，删掉了大部分。从空格开始.
var nl=0;
for(var i=0;i<fontData.length;i+=2){
var c1=getBitLine(fontData[i])
var c2=getBitLine(fontData[i+1]);
dots+=c1.dots+c2.dots;
lines.push(c1.line+c2.line);
nl++;
if(nl==32){
var str="<font size='2'><br/>"+String.fromCharCode(char)+
"("+char+"):"+dots+"dots</font>";
lines.push(str);
nl=0;
dots=0;
char++;
}
}
var content=lines.join("<br/>");
document.getElementById("divOut").innerHTML+=content;
}
</script>
</head>
<body>
<div id="divOut" style="font-size:4px; line-height:4px;"></div>
</body>
</html>