ngx-chiptan
Version:
Angular component to renders chiptan flicker code.
142 lines • 19.8 kB
JavaScript
/*
Copyright (c) 2010–2012
Lars-Dominik Braun <lars@6xq.net>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
export function flickerCode(newcode) {
let code = newcode.toUpperCase().replace(/[^a-fA-F0-9]/g, '');
const toHex = (n, minlen) => {
let s = n.toString(16).toUpperCase();
while (s.length < minlen) {
s = '0' + s;
}
return s;
};
const quersumme = (n) => {
let q = 0;
while (n != 0) {
q += n % 10;
n = Math.floor(n / 10);
}
return q;
};
const getPayload = () => {
let i = 0;
let payload = '';
let len = parseInt(code.slice(0, 2), 16);
i += 2;
while (i < code.length - 2) {
i += 1;
len = parseInt(code.slice(i, i + 1), 16);
i += 1;
payload += code.slice(i, i + len * 2);
i += len * 2;
}
return payload;
};
const checksum = () => {
const len = code.length / 2 - 1;
code = toHex(len, 2) + code.substr(2);
const luhndata = getPayload();
let luhnsum = 0;
for (let i = 0; i < luhndata.length; i += 2) {
luhnsum += (1 * parseInt(luhndata[i], 16)) + quersumme(2 * parseInt(luhndata[i + 1], 16));
}
luhnsum = (10 - (luhnsum % 10)) % 10;
code = code.substr(0, code.length - 2) + toHex(luhnsum, 1) + code.substr(code.length - 1);
let xorsum = 0;
for (let i = 0; i < code.length - 2; i++) {
xorsum ^= parseInt(code[i], 16);
}
code = code.substr(0, code.length - 1) + toHex(xorsum, 1);
};
this.getCode = () => code;
checksum();
}
export function flickerCanvas(width, height, bgColor, barColor) {
let code, halfbyteid, clock, bitarray, canvas, ctx;
this.reset = () => {
halfbyteid = 0;
clock = 1;
};
const setup = () => {
const bits = new Object();
bits['0'] = [0, 0, 0, 0, 0];
bits['1'] = [0, 1, 0, 0, 0];
bits['2'] = [0, 0, 1, 0, 0];
bits['3'] = [0, 1, 1, 0, 0];
bits['4'] = [0, 0, 0, 1, 0];
bits['5'] = [0, 1, 0, 1, 0];
bits['6'] = [0, 0, 1, 1, 0];
bits['7'] = [0, 1, 1, 1, 0];
bits['8'] = [0, 0, 0, 0, 1];
bits['9'] = [0, 1, 0, 0, 1];
bits['A'] = [0, 0, 1, 0, 1];
bits['B'] = [0, 1, 1, 0, 1];
bits['C'] = [0, 0, 0, 1, 1];
bits['D'] = [0, 1, 0, 1, 1];
bits['E'] = [0, 0, 1, 1, 1];
bits['F'] = [0, 1, 1, 1, 1];
code = '0FFF' + code;
bitarray = [];
for (let i = 0; i < code.length; i += 2) {
bitarray[i] = bits[code[i + 1]];
bitarray[i + 1] = bits[code[i]];
}
};
const createCanvas = (width, height, bgColor, barColor) => {
canvas = document.createElement('canvas');
canvas.width = width;
canvas.height = height;
if (canvas.getContext) {
ctx = canvas.getContext('2d');
}
ctx.fillStyle = bgColor;
ctx.fillRect(0, 0, canvas.width, canvas.height);
};
this.step = () => {
const margin = 7;
const barwidth = canvas.width / 5;
bitarray[halfbyteid][0] = clock;
for (let i = 0; i < 5; i++) {
if (bitarray[halfbyteid][i] == 1) {
ctx.fillStyle = barColor;
}
else {
ctx.fillStyle = bgColor;
}
ctx.fillRect(i * barwidth + margin, margin, barwidth - 2 * margin, canvas.height - 2 * margin);
}
clock--;
if (clock < 0) {
clock = 1;
halfbyteid++;
if (halfbyteid >= bitarray.length) {
halfbyteid = 0;
}
}
return 0;
};
this.getCanvas = () => canvas;
this.setCode = newcode => {
code = newcode.getCode();
setup();
this.reset();
};
createCanvas(width, height, bgColor, barColor);
}
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(c) 2010–2012\r\n    Lars-Dominik Braun <lars@6xq.net>\r\nPermission is hereby granted, free of charge, to any person obtaining a copy\r\nof this software and associated documentation files (the \"Software\"), to deal\r\nin the Software without restriction, including without limitation the rights\r\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\r\ncopies of the Software, and to permit persons to whom the Software is\r\nfurnished to do so, subject to the following conditions:\r\nThe above copyright notice and this permission notice shall be included in\r\nall copies or substantial portions of the Software.\r\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\r\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\r\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\r\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\r\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\r\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\r\nTHE SOFTWARE.\r\n*/\r\n\r\nexport function flickerCode(newcode) {\r\n  let code = newcode.toUpperCase().replace(/[^a-fA-F0-9]/g, '');\r\n\r\n  const toHex = (n, minlen) => {\r\n    let s = n.toString(16).toUpperCase();\r\n    while (s.length < minlen) {\r\n      s = '0' + s;\r\n    }\r\n\r\n    return s;\r\n  }\r\n\r\n  const quersumme = (n) => {\r\n    let q = 0;\r\n    while (n != 0) {\r\n      q += n % 10;\r\n      n = Math.floor(n / 10);\r\n    }\r\n\r\n    return q;\r\n  }\r\n\r\n  const getPayload = () => {\r\n    let i = 0;\r\n    let payload = '';\r\n\r\n    let len = parseInt(code.slice(0, 2), 16);\r\n    i += 2;\r\n    while (i < code.length - 2) {\r\n      i += 1;\r\n      len = parseInt(code.slice(i, i + 1), 16);\r\n      i += 1;\r\n      payload += code.slice(i, i+ len * 2);\r\n      i += len * 2;\r\n    }\r\n\r\n    return payload;\r\n  }\r\n\r\n  const checksum = () => {\r\n    const len = code.length / 2 - 1;\r\n    code = toHex(len, 2) + code.substr(2);\r\n\r\n    const luhndata = getPayload();\r\n    let luhnsum = 0;\r\n    for (let i = 0; i < luhndata.length; i += 2) {\r\n      luhnsum += (1 * parseInt(luhndata[i], 16)) + quersumme(2 * parseInt(luhndata[i + 1], 16));\r\n    }\r\n    luhnsum = (10 - (luhnsum % 10)) % 10;\r\n    code = code.substr(0, code.length - 2) + toHex(luhnsum, 1) + code.substr(code.length - 1);\r\n\r\n    let xorsum = 0;\r\n    for (let i = 0; i < code.length - 2; i++) {\r\n      xorsum ^= parseInt(code[i], 16);\r\n    }\r\n\r\n    code = code.substr(0, code.length-1) + toHex(xorsum, 1);\r\n  }\r\n\r\n  this.getCode = () => code;\r\n\r\n  checksum();\r\n}\r\n\r\nexport function flickerCanvas(width, height, bgColor, barColor) {\r\n  let code, halfbyteid, clock, bitarray, canvas, ctx;\r\n\r\n  this.reset = () => {\r\n    halfbyteid = 0;\r\n    clock = 1;\r\n  };\r\n\r\n  const setup = () => {\r\n    const bits = new Object();\r\n    bits['0'] = [0, 0, 0, 0, 0];\r\n    bits['1'] = [0, 1, 0, 0, 0];\r\n    bits['2'] = [0, 0, 1, 0, 0];\r\n    bits['3'] = [0, 1, 1, 0, 0];\r\n    bits['4'] = [0, 0, 0, 1, 0];\r\n    bits['5'] = [0, 1, 0, 1, 0];\r\n    bits['6'] = [0, 0, 1, 1, 0];\r\n    bits['7'] = [0, 1, 1, 1, 0];\r\n    bits['8'] = [0, 0, 0, 0, 1];\r\n    bits['9'] = [0, 1, 0, 0, 1];\r\n    bits['A'] = [0, 0, 1, 0, 1];\r\n    bits['B'] = [0, 1, 1, 0, 1];\r\n    bits['C'] = [0, 0, 0, 1, 1];\r\n    bits['D'] = [0, 1, 0, 1, 1];\r\n    bits['E'] = [0, 0, 1, 1, 1];\r\n    bits['F'] = [0, 1, 1, 1, 1];\r\n\r\n    code = '0FFF' + code;\r\n\r\n    bitarray = [];\r\n    for (let i = 0; i < code.length; i += 2) {\r\n      bitarray[i] = bits[code[i+1]];\r\n      bitarray[i+1] = bits[code[i]];\r\n    }\r\n  };\r\n\r\n  const createCanvas = (width, height, bgColor, barColor) => {\r\n    canvas = document.createElement('canvas');\r\n    canvas.width = width;\r\n    canvas.height = height;\r\n    if (canvas.getContext) {\r\n      ctx = canvas.getContext('2d');\r\n    }\r\n\r\n    ctx.fillStyle = bgColor;\r\n    ctx.fillRect(0, 0, canvas.width, canvas.height);\r\n  }\r\n\r\n  this.step = () => {\r\n    const margin = 7;\r\n    const barwidth = canvas.width / 5;\r\n\r\n    bitarray[halfbyteid][0] = clock;\r\n\r\n    for (let i = 0; i < 5; i++) {\r\n      if (bitarray[halfbyteid][i] == 1) {\r\n        ctx.fillStyle = barColor;\r\n      } else {\r\n        ctx.fillStyle = bgColor;\r\n      }\r\n      ctx.fillRect(i * barwidth + margin, margin, barwidth - 2 * margin, canvas.height - 2 * margin);\r\n    }\r\n\r\n    clock--;\r\n    if (clock < 0) {\r\n      clock = 1;\r\n\r\n      halfbyteid++;\r\n      if (halfbyteid >= bitarray.length) {\r\n        halfbyteid = 0;\r\n      }\r\n\r\n    }\r\n\r\n    return 0;\r\n  }\r\n\r\n  this.getCanvas = () => canvas;\r\n\r\n  this.setCode = newcode => {\r\n    code = newcode.getCode();\r\n    setup();\r\n    this.reset();\r\n  }\r\n\r\n  createCanvas(width, height, bgColor, barColor);\r\n}\r\n"]}