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可以让无影坦克现形
目前为
// ==UserScript==
// @name 坦克现形
// @namespace blog.site.xiaobu
// @version 0.4
// @description 可以让无影坦克现形
// @author xiaobu
// @match *://*/*
// @grant none
// ==/UserScript==
(function () {
'use strict';
document.body.onmouseover = function (e) {
if (e.target.tagName === 'IMG') {
show(e.target);
}
}
/**
* 将无影坦克现形
* @param select 选择器
* */
function show(select) {
let can = document.createElement("canvas");
let con = can.getContext("2d");
let img = new Image();
img.crossOrigin = 'Anonymous';
img.src = select.src;
img.onload = function () {
can.width = img.width;
can.height = img.height;
con.drawImage(img, 0, 0);
let imgData = con.getImageData(0, 0, img.width, img.height);
let list = de(imgData.data[2] % 8, imgData);
let file = new File([list[1].buffer], utf8Decode(list[0][1]), {type: list[0][2]})
let path = URL.createObjectURL(file);
select.href = path;
select.src = path;
select.style.display = "block";
select.innerHTML = file;
}
}
/**
* 解密图像主代码
* */
function de(mode, imgdata) {
let aa = Math.ceil(3 * mode / 8);
let n = imgdata.width * imgdata.height;
let j = 0;
let k = "";
let i = 1;
let mlist = [1, 2, 4, 8, 16, 32, 64, 128];
let word = "";
let blist//=new Uint8Array();
let blength = 0;
while (i < n && (word.length === 0 || word.slice(-1).charCodeAt(0) > 0)) {
k = k + (imgdata.data[4 * i] + 256).toString(2).slice(-mode);
k = k + (imgdata.data[4 * i + 1] + 256).toString(2).slice(-mode);
k = k + (imgdata.data[4 * i + 2] + 256).toString(2).slice(-mode);
i++
for (let ii = 0; ii < aa; ii++) {
if (k.length >= 8 && (word.length === 0 || word.slice(-1).charCodeAt(0) > 0)) {
word = word + String.fromCharCode(parseInt(k.slice(0, 8), 2));
k = k.slice(8);
}
}
}
// word分隔符:","
blength = parseInt(word.split(String.fromCharCode(1))[0]);
if (!(blength > -1)) {
throw "error"
}
if (!(word.split(String.fromCharCode(1)).length > 2)) {
throw "error"
}
blist = new Uint8Array(blength);
if (k.length >= 8 && j < blength) {
blist[j] = parseInt(k.slice(0, 8), 2);
k = k.slice(8);
j++
}
while (i < n && j < blength) {
k = k + (imgdata.data[4 * i] + 256).toString(2).slice(-mode);
k = k + (imgdata.data[4 * i + 1] + 256).toString(2).slice(-mode);
k = k + (imgdata.data[4 * i + 2] + 256).toString(2).slice(-mode);
i++
for (let ii = 0; ii < aa; ii++) {
if (k.length >= 8 && j < blength) {
blist[j] = parseInt(k.slice(0, 8), 2);
k = k.slice(8);
j++
}
}
}
return [word.split(String.fromCharCode(0))[0].split(String.fromCharCode(1)), blist]
}
/* utf8 加密 */
function utf8Encode(string) {
let utftext = "";
for (let n = 0; n < string.length; n++) {
let c = string.charCodeAt(n);
if (c < 128) {
utftext += String.fromCharCode(c);
} else if ((c > 127) && (c < 2048)) {
utftext += String.fromCharCode((c >> 6) | 192);
utftext += String.fromCharCode((c & 63) | 128);
} else {
utftext += String.fromCharCode((c >> 12) | 224);
utftext += String.fromCharCode(((c >> 6) & 63) | 128);
utftext += String.fromCharCode((c & 63) | 128);
}
}
return utftext;
}
/* utf8 解密 */
function utf8Decode(inputStr) {
let outputStr = "";
let code1, code2, code3, code4;
for (let i = 0; i < inputStr.length; i++) {
code1 = inputStr.charCodeAt(i);
if (code1 < 128) {
outputStr += String.fromCharCode(code1);
} else if (code1 < 224) {
code2 = inputStr.charCodeAt(++i);
outputStr += String.fromCharCode(((code1 & 31) << 6) | (code2 & 63));
} else if (code1 < 240) {
code2 = inputStr.charCodeAt(++i);
code3 = inputStr.charCodeAt(++i);
outputStr += String.fromCharCode(((code1 & 15) << 12) | ((code2 & 63) << 6) | (code3 & 63));
} else {
code2 = inputStr.charCodeAt(++i);
code3 = inputStr.charCodeAt(++i);
code4 = inputStr.charCodeAt(++i);
outputStr += String.fromCharCode(((code1 & 7) << 18) | ((code2 & 63) << 12) | ((code3 & 63) << 6) | (code2 & 63));
}
}
return outputStr;
}
})();