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  1. 

  2. <!doctype html>
    3. 

  3. <html lang="en">
    4. 

  4. 

  5. <head>
    6. 

  6.     <title>Code coverage report for packer.js</title>
    7. 

  7.     <meta charset="utf-8" />
    8. 

  8.     <link rel="stylesheet" href="prettify.css" />
    9. 

  9.     <link rel="stylesheet" href="base.css" />
    10. 

  10.     <link rel="shortcut icon" type="image/x-icon" href="favicon.png" />
    11. 

  11.     <meta name="viewport" content="width=device-width, initial-scale=1" />
    12. 

  12.     <style type='text/css'>
    13. 

  13.         .coverage-summary .sorter {
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  14.             background-image: url(sort-arrow-sprite.png);
    15. 

  15.         }
    16. 

  16.     </style>
    17. 

  17. </head>
    18. 

  18.     
    19. 

  19. <body>
    20. 

  20. <div class='wrapper'>
    21. 

  21.     <div class='pad1'>
    22. 

  22.         <h1><a href="index.html">All files</a> packer.js</h1>
    23. 

  23.         <div class='clearfix'>
    24. 

  24.             
    25. 

  25.             <div class='fl pad1y space-right2'>
    26. 

  26.                 <span class="strong">94.74% </span>
    27. 

  27.                 <span class="quiet">Statements</span>
    28. 

  28.                 <span class='fraction'>54/57</span>
    29. 

  29.             </div>
    30. 

  30.         
    31. 

  31.             
    32. 

  32.             <div class='fl pad1y space-right2'>
    33. 

  33.                 <span class="strong">67.86% </span>
    34. 

  34.                 <span class="quiet">Branches</span>
    35. 

  35.                 <span class='fraction'>19/28</span>
    36. 

  36.             </div>
    37. 

  37.         
    38. 

  38.             
    39. 

  39.             <div class='fl pad1y space-right2'>
    40. 

  40.                 <span class="strong">100% </span>
    41. 

  41.                 <span class="quiet">Functions</span>
    42. 

  42.                 <span class='fraction'>9/9</span>
    43. 

  43.             </div>
    44. 

  44.         
    45. 

  45.             
    46. 

  46.             <div class='fl pad1y space-right2'>
    47. 

  47.                 <span class="strong">94.74% </span>
    48. 

  48.                 <span class="quiet">Lines</span>
    49. 

  49.                 <span class='fraction'>54/57</span>
    50. 

  50.             </div>
    51. 

  51.         
    52. 

  52.             
    53. 

  53.         </div>
    54. 

  54.         <p class="quiet">
    55. 

  55.             Press <em>n</em> or <em>j</em> to go to the next uncovered block, <em>b</em>, <em>p</em> or <em>k</em> for the previous block.
    56. 

  56.         </p>
    57. 

  57.     </div>
    58. 

  58.     <div class='status-line high'></div>
    59. 

  59.     <pre><table class="coverage">
    60. 

  60. <tr><td class="line-count quiet"><a name='L1'></a><a href='#L1'>1</a>
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  61. <a name='L2'></a><a href='#L2'>2</a>
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    303. 

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    304. 

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    305. 

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    306. 

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    307. 

  307. <span class="cline-any cline-neutral">&nbsp;</span>
    308. 

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    309. 

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    310. 

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    311. 

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    312. 

  312. <span class="cline-any cline-yes">652x</span>
    313. 

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    318. 

  318. <span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">"use strict";
    319. 

  319. &nbsp;
    320. 

  320. let constants = require("./constants");
    321. 

  321. let CrcStream = require("./crc");
    322. 

  322. let bitPacker = require("./bitpacker");
    323. 

  323. let filter = require("./filter-pack");
    324. 

  324. let zlib = require("zlib");
    325. 

  325. &nbsp;
    326. 

  326. let Packer = (module.exports = function (options) {
    327. 

  327.   this._options = options;
    328. 

  328. &nbsp;
    329. 

  329.   options.deflateChunkSize = options.deflateChunkSize || 32 * 1024;
    330. 

  330.   options.deflateLevel =
    331. 

  331.     options.deflateLevel != null ? <span class="branch-0 cbranch-no" title="branch not covered" >options.deflateLevel </span>: 9;
    332. 

  332.   options.deflateStrategy =
    333. 

  333.     options.deflateStrategy != null ? <span class="branch-0 cbranch-no" title="branch not covered" >options.deflateStrategy </span>: 3;
    334. 

  334.   options.inputHasAlpha =
    335. 

  335.     options.inputHasAlpha != null ? <span class="branch-0 cbranch-no" title="branch not covered" >options.inputHasAlpha </span>: true;
    336. 

  336.   options.deflateFactory = options.deflateFactory || zlib.createDeflate;
    337. 

  337.   options.bitDepth = options.bitDepth || 8;
    338. 

  338.   // This is outputColorType
    339. 

  339.   options.colorType =
    340. 

  340.     typeof options.colorType === "number"
    341. 

  341.       ? <span class="branch-0 cbranch-no" title="branch not covered" >options.colorType</span>
    342. 

  342.       : constants.COLORTYPE_COLOR_ALPHA;
    343. 

  343.   options.inputColorType =
    344. 

  344.     typeof options.inputColorType === "number"
    345. 

  345.       ? <span class="branch-0 cbranch-no" title="branch not covered" >options.inputColorType</span>
    346. 

  346.       : constants.COLORTYPE_COLOR_ALPHA;
    347. 

  347. &nbsp;
    348. 

  348.   <span class="missing-if-branch" title="if path not taken" >I</span>if (
    349. 

  349.     [
    350. 

  350.       constants.COLORTYPE_GRAYSCALE,
    351. 

  351.       constants.COLORTYPE_COLOR,
    352. 

  352.       constants.COLORTYPE_COLOR_ALPHA,
    353. 

  353.       constants.COLORTYPE_ALPHA,
    354. 

  354.     ].indexOf(options.colorType) === -1
    355. 

  355.   ) {
    356. 

  356. <span class="cstat-no" title="statement not covered" >    throw new Error(</span>
    357. 

  357.       "option color type:" + options.colorType + " is not supported at present"
    358. 

  358.     );
    359. 

  359.   }
    360. 

  360.   <span class="missing-if-branch" title="if path not taken" >I</span>if (
    361. 

  361.     [
    362. 

  362.       constants.COLORTYPE_GRAYSCALE,
    363. 

  363.       constants.COLORTYPE_COLOR,
    364. 

  364.       constants.COLORTYPE_COLOR_ALPHA,
    365. 

  365.       constants.COLORTYPE_ALPHA,
    366. 

  366.     ].indexOf(options.inputColorType) === -1
    367. 

  367.   ) {
    368. 

  368. <span class="cstat-no" title="statement not covered" >    throw new Error(</span>
    369. 

  369.       "option input color type:" +
    370. 

  370.         options.inputColorType +
    371. 

  371.         " is not supported at present"
    372. 

  372.     );
    373. 

  373.   }
    374. 

  374.   <span class="missing-if-branch" title="if path not taken" >I</span>if (options.bitDepth !== 8 &amp;&amp; <span class="branch-1 cbranch-no" title="branch not covered" >options.bitDepth !== 16)</span> {
    375. 

  375. <span class="cstat-no" title="statement not covered" >    throw new Error(</span>
    376. 

  376.       "option bit depth:" + options.bitDepth + " is not supported at present"
    377. 

  377.     );
    378. 

  378.   }
    379. 

  379. });
    380. 

  380. &nbsp;
    381. 

  381. Packer.prototype.getDeflateOptions = function () {
    382. 

  382.   return {
    383. 

  383.     chunkSize: this._options.deflateChunkSize,
    384. 

  384.     level: this._options.deflateLevel,
    385. 

  385.     strategy: this._options.deflateStrategy,
    386. 

  386.   };
    387. 

  387. };
    388. 

  388. &nbsp;
    389. 

  389. Packer.prototype.createDeflate = function () {
    390. 

  390.   return this._options.deflateFactory(this.getDeflateOptions());
    391. 

  391. };
    392. 

  392. &nbsp;
    393. 

  393. Packer.prototype.filterData = function (data, width, height) {
    394. 

  394.   // convert to correct format for filtering (e.g. right bpp and bit depth)
    395. 

  395.   let packedData = bitPacker(data, width, height, this._options);
    396. 

  396. &nbsp;
    397. 

  397.   // filter pixel data
    398. 

  398.   let bpp = constants.COLORTYPE_TO_BPP_MAP[this._options.colorType];
    399. 

  399.   let filteredData = filter(packedData, width, height, this._options, bpp);
    400. 

  400.   return filteredData;
    401. 

  401. };
    402. 

  402. &nbsp;
    403. 

  403. Packer.prototype._packChunk = function (type, data) {
    404. 

  404.   let len = data ? data.length : 0;
    405. 

  405.   let buf = Buffer.alloc(len + 12);
    406. 

  406. &nbsp;
    407. 

  407.   buf.writeUInt32BE(len, 0);
    408. 

  408.   buf.writeUInt32BE(type, 4);
    409. 

  409. &nbsp;
    410. 

  410.   if (data) {
    411. 

  411.     data.copy(buf, 8);
    412. 

  412.   }
    413. 

  413. &nbsp;
    414. 

  414.   buf.writeInt32BE(
    415. 

  415.     CrcStream.crc32(buf.slice(4, buf.length - 4)),
    416. 

  416.     buf.length - 4
    417. 

  417.   );
    418. 

  418.   return buf;
    419. 

  419. };
    420. 

  420. &nbsp;
    421. 

  421. Packer.prototype.packGAMA = function (gamma) {
    422. 

  422.   let buf = Buffer.alloc(4);
    423. 

  423.   buf.writeUInt32BE(Math.floor(gamma * constants.GAMMA_DIVISION), 0);
    424. 

  424.   return this._packChunk(constants.TYPE_gAMA, buf);
    425. 

  425. };
    426. 

  426. &nbsp;
    427. 

  427. Packer.prototype.packIHDR = function (width, height) {
    428. 

  428.   let buf = Buffer.alloc(13);
    429. 

  429.   buf.writeUInt32BE(width, 0);
    430. 

  430.   buf.writeUInt32BE(height, 4);
    431. 

  431.   buf[8] = this._options.bitDepth; // Bit depth
    432. 

  432.   buf[9] = this._options.colorType; // colorType
    433. 

  433.   buf[10] = 0; // compression
    434. 

  434.   buf[11] = 0; // filter
    435. 

  435.   buf[12] = 0; // interlace
    436. 

  436. &nbsp;
    437. 

  437.   return this._packChunk(constants.TYPE_IHDR, buf);
    438. 

  438. };
    439. 

  439. &nbsp;
    440. 

  440. Packer.prototype.packIDAT = function (data) {
    441. 

  441.   return this._packChunk(constants.TYPE_IDAT, data);
    442. 

  442. };
    443. 

  443. &nbsp;
    444. 

  444. Packer.prototype.packIEND = function () {
    445. 

  445.   return this._packChunk(constants.TYPE_IEND, null);
    446. 

  446. };
    447. 

  447. &nbsp;</pre></td></tr></table></pre>
    448. 

  448. 

  449.                 <div class='push'></div><!-- for sticky footer -->
    450. 

  450.             </div><!-- /wrapper -->
    451. 

  451.             <div class='footer quiet pad2 space-top1 center small'>
    452. 

  452.                 Code coverage generated by
    453. 

  453.                 <a href="https://istanbul.js.org/" target="_blank">istanbul</a>
    454. 

  454.                 at Fri Apr 10 2020 13:53:16 GMT+0200 (Central European Summer Time)
    455. 

  455.             </div>
    456. 

  456.         </div>
    457. 

  457.         <script src="prettify.js"></script>
    458. 

  458.         <script>
    459. 

  459.             window.onload = function () {
    460. 

  460.                 prettyPrint();
    461. 

  461.             };
    462. 

  462.         </script>
    463. 

  463.         <script src="sorter.js"></script>
    464. 

  464.         <script src="block-navigation.js"></script>
    465. 

  465.     </body>
    466. 

  466. </html>
    467. 

  467.     
    468.