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  1. 

  2. <!doctype html>
    3. 

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

  4. 

  5. <head>
    6. 

  6.     <title>Code coverage report for bitpacker.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 {
    14. 

  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> bitpacker.js</h1>
    23. 

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

  24.             
    25. 

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

  26.                 <span class="strong">11.36% </span>
    27. 

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

  28.                 <span class='fraction'>10/88</span>
    29. 

  29.             </div>
    30. 

  30.         
    31. 

  31.             
    32. 

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

  33.                 <span class="strong">6.12% </span>
    34. 

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

  35.                 <span class='fraction'>3/49</span>
    36. 

  36.             </div>
    37. 

  37.         
    38. 

  38.             
    39. 

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

  40.                 <span class="strong">66.67% </span>
    41. 

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

  42.                 <span class='fraction'>2/3</span>
    43. 

  43.             </div>
    44. 

  44.         
    45. 

  45.             
    46. 

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

  47.                 <span class="strong">11.63% </span>
    48. 

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

  49.                 <span class='fraction'>10/86</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 low'></div>
    59. 

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

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

  61. <a name='L2'></a><a href='#L2'>2</a>
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  62. <a name='L3'></a><a href='#L3'>3</a>
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  68. <a name='L9'></a><a href='#L9'>9</a>
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  69. <a name='L10'></a><a href='#L10'>10</a>
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  70. <a name='L11'></a><a href='#L11'>11</a>
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  71. <a name='L12'></a><a href='#L12'>12</a>
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  72. <a name='L13'></a><a href='#L13'>13</a>
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  73. <a name='L14'></a><a href='#L14'>14</a>
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  81. <a name='L22'></a><a href='#L22'>22</a>
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  82. <a name='L23'></a><a href='#L23'>23</a>
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  83. <a name='L24'></a><a href='#L24'>24</a>
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  90. <a name='L31'></a><a href='#L31'>31</a>
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  92. <a name='L33'></a><a href='#L33'>33</a>
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  93. <a name='L34'></a><a href='#L34'>34</a>
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  95. <a name='L36'></a><a href='#L36'>36</a>
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  376. <span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">"use strict";
    377. 

  377. &nbsp;
    378. 

  378. let constants = require("./constants");
    379. 

  379. &nbsp;
    380. 

  380. module.exports = function (dataIn, width, height, options) {
    381. 

  381.   let outHasAlpha =
    382. 

  382.     [constants.COLORTYPE_COLOR_ALPHA, constants.COLORTYPE_ALPHA].indexOf(
    383. 

  383.       options.colorType
    384. 

  384.     ) !== -1;
    385. 

  385.   <span class="missing-if-branch" title="else path not taken" >E</span>if (options.colorType === options.inputColorType) {
    386. 

  386.     let bigEndian = (function () {
    387. 

  387.       let buffer = new ArrayBuffer(2);
    388. 

  388.       new DataView(buffer).setInt16(0, 256, true /* littleEndian */);
    389. 

  389.       // Int16Array uses the platform's endianness.
    390. 

  390.       return new Int16Array(buffer)[0] !== 256;
    391. 

  391.     })();
    392. 

  392.     // If no need to convert to grayscale and alpha is present/absent in both, take a fast route
    393. 

  393.     <span class="missing-if-branch" title="else path not taken" >E</span>if (options.bitDepth === 8 || (<span class="branch-1 cbranch-no" title="branch not covered" >options.bitDepth === 16 </span>&amp;&amp; <span class="branch-2 cbranch-no" title="branch not covered" >bigEndian)</span>) {
    394. 

  394.       return dataIn;
    395. 

  395.     }
    396. 

  396.   }
    397. 

  397. &nbsp;
    398. 

  398.   // map to a UInt16 array if data is 16bit, fix endianness below
    399. 

  399.   let data = <span class="cstat-no" title="statement not covered" >options.bitDepth !== 16 ? dataIn : new Uint16Array(dataIn.buffer);</span>
    400. 

  400. &nbsp;
    401. 

  401.   let maxValue = <span class="cstat-no" title="statement not covered" >255;</span>
    402. 

  402.   let inBpp = <span class="cstat-no" title="statement not covered" >constants.COLORTYPE_TO_BPP_MAP[options.inputColorType];</span>
    403. 

  403. <span class="cstat-no" title="statement not covered" >  if (inBpp === 4 &amp;&amp; !options.inputHasAlpha) {</span>
    404. 

  404. <span class="cstat-no" title="statement not covered" >    inBpp = 3;</span>
    405. 

  405.   }
    406. 

  406.   let outBpp = <span class="cstat-no" title="statement not covered" >constants.COLORTYPE_TO_BPP_MAP[options.colorType];</span>
    407. 

  407. <span class="cstat-no" title="statement not covered" >  if (options.bitDepth === 16) {</span>
    408. 

  408. <span class="cstat-no" title="statement not covered" >    maxValue = 65535;</span>
    409. 

  409. <span class="cstat-no" title="statement not covered" >    outBpp *= 2;</span>
    410. 

  410.   }
    411. 

  411.   let outData = <span class="cstat-no" title="statement not covered" >Buffer.alloc(width * height * outBpp);</span>
    412. 

  412. &nbsp;
    413. 

  413.   let inIndex = <span class="cstat-no" title="statement not covered" >0;</span>
    414. 

  414.   let outIndex = <span class="cstat-no" title="statement not covered" >0;</span>
    415. 

  415. &nbsp;
    416. 

  416.   let bgColor = <span class="cstat-no" title="statement not covered" >options.bgColor || {};</span>
    417. 

  417. <span class="cstat-no" title="statement not covered" >  if (bgColor.red === undefined) {</span>
    418. 

  418. <span class="cstat-no" title="statement not covered" >    bgColor.red = maxValue;</span>
    419. 

  419.   }
    420. 

  420. <span class="cstat-no" title="statement not covered" >  if (bgColor.green === undefined) {</span>
    421. 

  421. <span class="cstat-no" title="statement not covered" >    bgColor.green = maxValue;</span>
    422. 

  422.   }
    423. 

  423. <span class="cstat-no" title="statement not covered" >  if (bgColor.blue === undefined) {</span>
    424. 

  424. <span class="cstat-no" title="statement not covered" >    bgColor.blue = maxValue;</span>
    425. 

  425.   }
    426. 

  426. &nbsp;
    427. 

  427.   function <span class="fstat-no" title="function not covered" >getRGBA(</span>) {
    428. 

  428.     let red;
    429. 

  429.     let green;
    430. 

  430.     let blue;
    431. 

  431.     let alpha = <span class="cstat-no" title="statement not covered" >maxValue;</span>
    432. 

  432. <span class="cstat-no" title="statement not covered" >    switch (options.inputColorType) {</span>
    433. 

  433.       case constants.COLORTYPE_COLOR_ALPHA:
    434. 

  434. <span class="cstat-no" title="statement not covered" >        alpha = data[inIndex + 3];</span>
    435. 

  435. <span class="cstat-no" title="statement not covered" >        red = data[inIndex];</span>
    436. 

  436. <span class="cstat-no" title="statement not covered" >        green = data[inIndex + 1];</span>
    437. 

  437. <span class="cstat-no" title="statement not covered" >        blue = data[inIndex + 2];</span>
    438. 

  438. <span class="cstat-no" title="statement not covered" >        break;</span>
    439. 

  439.       case constants.COLORTYPE_COLOR:
    440. 

  440. <span class="cstat-no" title="statement not covered" >        red = data[inIndex];</span>
    441. 

  441. <span class="cstat-no" title="statement not covered" >        green = data[inIndex + 1];</span>
    442. 

  442. <span class="cstat-no" title="statement not covered" >        blue = data[inIndex + 2];</span>
    443. 

  443. <span class="cstat-no" title="statement not covered" >        break;</span>
    444. 

  444.       case constants.COLORTYPE_ALPHA:
    445. 

  445. <span class="cstat-no" title="statement not covered" >        alpha = data[inIndex + 1];</span>
    446. 

  446. <span class="cstat-no" title="statement not covered" >        red = data[inIndex];</span>
    447. 

  447. <span class="cstat-no" title="statement not covered" >        green = red;</span>
    448. 

  448. <span class="cstat-no" title="statement not covered" >        blue = red;</span>
    449. 

  449. <span class="cstat-no" title="statement not covered" >        break;</span>
    450. 

  450.       case constants.COLORTYPE_GRAYSCALE:
    451. 

  451. <span class="cstat-no" title="statement not covered" >        red = data[inIndex];</span>
    452. 

  452. <span class="cstat-no" title="statement not covered" >        green = red;</span>
    453. 

  453. <span class="cstat-no" title="statement not covered" >        blue = red;</span>
    454. 

  454. <span class="cstat-no" title="statement not covered" >        break;</span>
    455. 

  455.       default:
    456. 

  456. <span class="cstat-no" title="statement not covered" >        throw new Error(</span>
    457. 

  457.           "input color type:" +
    458. 

  458.             options.inputColorType +
    459. 

  459.             " is not supported at present"
    460. 

  460.         );
    461. 

  461.     }
    462. 

  462. &nbsp;
    463. 

  463. <span class="cstat-no" title="statement not covered" >    if (options.inputHasAlpha) {</span>
    464. 

  464. <span class="cstat-no" title="statement not covered" >      if (!outHasAlpha) {</span>
    465. 

  465. <span class="cstat-no" title="statement not covered" >        alpha /= maxValue;</span>
    466. 

  466. <span class="cstat-no" title="statement not covered" >        red = Math.min(</span>
    467. 

  467.           Math.max(Math.round((1 - alpha) * bgColor.red + alpha * red), 0),
    468. 

  468.           maxValue
    469. 

  469.         );
    470. 

  470. <span class="cstat-no" title="statement not covered" >        green = Math.min(</span>
    471. 

  471.           Math.max(Math.round((1 - alpha) * bgColor.green + alpha * green), 0),
    472. 

  472.           maxValue
    473. 

  473.         );
    474. 

  474. <span class="cstat-no" title="statement not covered" >        blue = Math.min(</span>
    475. 

  475.           Math.max(Math.round((1 - alpha) * bgColor.blue + alpha * blue), 0),
    476. 

  476.           maxValue
    477. 

  477.         );
    478. 

  478.       }
    479. 

  479.     }
    480. 

  480. <span class="cstat-no" title="statement not covered" >    return { red: red, green: green, blue: blue, alpha: alpha };</span>
    481. 

  481.   }
    482. 

  482. &nbsp;
    483. 

  483. <span class="cstat-no" title="statement not covered" >  for (let y = <span class="cstat-no" title="statement not covered" >0;</span> y &lt; height; y++) {</span>
    484. 

  484. <span class="cstat-no" title="statement not covered" >    for (let x = <span class="cstat-no" title="statement not covered" >0;</span> x &lt; width; x++) {</span>
    485. 

  485.       let rgba = <span class="cstat-no" title="statement not covered" >getRGBA(data, inIndex);</span>
    486. 

  486. &nbsp;
    487. 

  487. <span class="cstat-no" title="statement not covered" >      switch (options.colorType) {</span>
    488. 

  488.         case constants.COLORTYPE_COLOR_ALPHA:
    489. 

  489.         case constants.COLORTYPE_COLOR:
    490. 

  490. <span class="cstat-no" title="statement not covered" >          if (options.bitDepth === 8) {</span>
    491. 

  491. <span class="cstat-no" title="statement not covered" >            outData[outIndex] = rgba.red;</span>
    492. 

  492. <span class="cstat-no" title="statement not covered" >            outData[outIndex + 1] = rgba.green;</span>
    493. 

  493. <span class="cstat-no" title="statement not covered" >            outData[outIndex + 2] = rgba.blue;</span>
    494. 

  494. <span class="cstat-no" title="statement not covered" >            if (outHasAlpha) {</span>
    495. 

  495. <span class="cstat-no" title="statement not covered" >              outData[outIndex + 3] = rgba.alpha;</span>
    496. 

  496.             }
    497. 

  497.           } else {
    498. 

  498. <span class="cstat-no" title="statement not covered" >            outData.writeUInt16BE(rgba.red, outIndex);</span>
    499. 

  499. <span class="cstat-no" title="statement not covered" >            outData.writeUInt16BE(rgba.green, outIndex + 2);</span>
    500. 

  500. <span class="cstat-no" title="statement not covered" >            outData.writeUInt16BE(rgba.blue, outIndex + 4);</span>
    501. 

  501. <span class="cstat-no" title="statement not covered" >            if (outHasAlpha) {</span>
    502. 

  502. <span class="cstat-no" title="statement not covered" >              outData.writeUInt16BE(rgba.alpha, outIndex + 6);</span>
    503. 

  503.             }
    504. 

  504.           }
    505. 

  505. <span class="cstat-no" title="statement not covered" >          break;</span>
    506. 

  506.         case constants.COLORTYPE_ALPHA:
    507. 

  507.         case constants.COLORTYPE_GRAYSCALE: {
    508. 

  508.           // Convert to grayscale and alpha
    509. 

  509.           let grayscale = <span class="cstat-no" title="statement not covered" >(rgba.red + rgba.green + rgba.blue) / 3;</span>
    510. 

  510. <span class="cstat-no" title="statement not covered" >          if (options.bitDepth === 8) {</span>
    511. 

  511. <span class="cstat-no" title="statement not covered" >            outData[outIndex] = grayscale;</span>
    512. 

  512. <span class="cstat-no" title="statement not covered" >            if (outHasAlpha) {</span>
    513. 

  513. <span class="cstat-no" title="statement not covered" >              outData[outIndex + 1] = rgba.alpha;</span>
    514. 

  514.             }
    515. 

  515.           } else {
    516. 

  516. <span class="cstat-no" title="statement not covered" >            outData.writeUInt16BE(grayscale, outIndex);</span>
    517. 

  517. <span class="cstat-no" title="statement not covered" >            if (outHasAlpha) {</span>
    518. 

  518. <span class="cstat-no" title="statement not covered" >              outData.writeUInt16BE(rgba.alpha, outIndex + 2);</span>
    519. 

  519.             }
    520. 

  520.           }
    521. 

  521. <span class="cstat-no" title="statement not covered" >          break;</span>
    522. 

  522.         }
    523. 

  523.         default:
    524. 

  524. <span class="cstat-no" title="statement not covered" >          throw new Error("unrecognised color Type " + options.colorType);</span>
    525. 

  525.       }
    526. 

  526. &nbsp;
    527. 

  527. <span class="cstat-no" title="statement not covered" >      inIndex += inBpp;</span>
    528. 

  528. <span class="cstat-no" title="statement not covered" >      outIndex += outBpp;</span>
    529. 

  529.     }
    530. 

  530.   }
    531. 

  531. &nbsp;
    532. 

  532. <span class="cstat-no" title="statement not covered" >  return outData;</span>
    533. 

  533. };
    534. 

  534. &nbsp;</pre></td></tr></table></pre>
    535. 

  535. 

  536.                 <div class='push'></div><!-- for sticky footer -->
    537. 

  537.             </div><!-- /wrapper -->
    538. 

  538.             <div class='footer quiet pad2 space-top1 center small'>
    539. 

  539.                 Code coverage generated by
    540. 

  540.                 <a href="https://istanbul.js.org/" target="_blank">istanbul</a>
    541. 

  541.                 at Fri Apr 10 2020 13:53:16 GMT+0200 (Central European Summer Time)
    542. 

  542.             </div>
    543. 

  543.         </div>
    544. 

  544.         <script src="prettify.js"></script>
    545. 

  545.         <script>
    546. 

  546.             window.onload = function () {
    547. 

  547.                 prettyPrint();
    548. 

  548.             };
    549. 

  549.         </script>
    550. 

  550.         <script src="sorter.js"></script>
    551. 

  551.         <script src="block-navigation.js"></script>
    552. 

  552.     </body>
    553. 

  553. </html>
    554. 

  554.     
    555.