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    <title>Code coverage report for bitmapper.js</title>
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        <h1><a href="index.html">All files</a> bitmapper.js</h1>
        <div class='clearfix'>
            
            <div class='fl pad1y space-right2'>
                <span class="strong">94.37% </span>
                <span class="quiet">Statements</span>
                <span class='fraction'>134/142</span>
            </div>
        
            
            <div class='fl pad1y space-right2'>
                <span class="strong">72.41% </span>
                <span class="quiet">Branches</span>
                <span class='fraction'>21/29</span>
            </div>
        
            
            <div class='fl pad1y space-right2'>
                <span class="strong">89.47% </span>
                <span class="quiet">Functions</span>
                <span class='fraction'>17/19</span>
            </div>
        
            
            <div class='fl pad1y space-right2'>
                <span class="strong">94.16% </span>
                <span class="quiet">Lines</span>
                <span class='fraction'>129/137</span>
            </div>
        
            
        </div>
        <p class="quiet">
            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.
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    <pre><table class="coverage">
<tr><td class="line-count quiet"><a name='L1'></a><a href='#L1'>1</a>
<a name='L2'></a><a href='#L2'>2</a>
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<a name='L9'></a><a href='#L9'>9</a>
<a name='L10'></a><a href='#L10'>10</a>
<a name='L11'></a><a href='#L11'>11</a>
<a name='L12'></a><a href='#L12'>12</a>
<a name='L13'></a><a href='#L13'>13</a>
<a name='L14'></a><a href='#L14'>14</a>
<a name='L15'></a><a href='#L15'>15</a>
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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">"use strict";
&nbsp;
let interlaceUtils = require("./interlace");
&nbsp;
let pixelBppMapper = [
  // 0 - dummy entry
<span class="fstat-no" title="function not covered" >  fu</span>nction () {},
&nbsp;
  // 1 - L
  // 0: 0, 1: 0, 2: 0, 3: 0xff
  function (pxData, data, pxPos, rawPos) {
    <span class="missing-if-branch" title="if path not taken" >I</span>if (rawPos === data.length) {
<span class="cstat-no" title="statement not covered" >      throw new Error("Ran out of data");</span>
    }
&nbsp;
    let pixel = data[rawPos];
    pxData[pxPos] = pixel;
    pxData[pxPos + 1] = pixel;
    pxData[pxPos + 2] = pixel;
    pxData[pxPos + 3] = 0xff;
  },
&nbsp;
  // 2 - LA
  // 0: 0, 1: 0, 2: 0, 3: 1
  function (pxData, data, pxPos, rawPos) {
    <span class="missing-if-branch" title="if path not taken" >I</span>if (rawPos + 1 &gt;= data.length) {
<span class="cstat-no" title="statement not covered" >      throw new Error("Ran out of data");</span>
    }
&nbsp;
    let pixel = data[rawPos];
    pxData[pxPos] = pixel;
    pxData[pxPos + 1] = pixel;
    pxData[pxPos + 2] = pixel;
    pxData[pxPos + 3] = data[rawPos + 1];
  },
&nbsp;
  // 3 - RGB
  // 0: 0, 1: 1, 2: 2, 3: 0xff
  function (pxData, data, pxPos, rawPos) {
    <span class="missing-if-branch" title="if path not taken" >I</span>if (rawPos + 2 &gt;= data.length) {
<span class="cstat-no" title="statement not covered" >      throw new Error("Ran out of data");</span>
    }
&nbsp;
    pxData[pxPos] = data[rawPos];
    pxData[pxPos + 1] = data[rawPos + 1];
    pxData[pxPos + 2] = data[rawPos + 2];
    pxData[pxPos + 3] = 0xff;
  },
&nbsp;
  // 4 - RGBA
  // 0: 0, 1: 1, 2: 2, 3: 3
  function (pxData, data, pxPos, rawPos) {
    <span class="missing-if-branch" title="if path not taken" >I</span>if (rawPos + 3 &gt;= data.length) {
<span class="cstat-no" title="statement not covered" >      throw new Error("Ran out of data");</span>
    }
&nbsp;
    pxData[pxPos] = data[rawPos];
    pxData[pxPos + 1] = data[rawPos + 1];
    pxData[pxPos + 2] = data[rawPos + 2];
    pxData[pxPos + 3] = data[rawPos + 3];
  },
];
&nbsp;
let pixelBppCustomMapper = [
  // 0 - dummy entry
<span class="fstat-no" title="function not covered" >  fu</span>nction () {},
&nbsp;
  // 1 - L
  // 0: 0, 1: 0, 2: 0, 3: 0xff
  function (pxData, pixelData, pxPos, maxBit) {
    let pixel = pixelData[0];
    pxData[pxPos] = pixel;
    pxData[pxPos + 1] = pixel;
    pxData[pxPos + 2] = pixel;
    pxData[pxPos + 3] = maxBit;
  },
&nbsp;
  // 2 - LA
  // 0: 0, 1: 0, 2: 0, 3: 1
  function (pxData, pixelData, pxPos) {
    let pixel = pixelData[0];
    pxData[pxPos] = pixel;
    pxData[pxPos + 1] = pixel;
    pxData[pxPos + 2] = pixel;
    pxData[pxPos + 3] = pixelData[1];
  },
&nbsp;
  // 3 - RGB
  // 0: 0, 1: 1, 2: 2, 3: 0xff
  function (pxData, pixelData, pxPos, maxBit) {
    pxData[pxPos] = pixelData[0];
    pxData[pxPos + 1] = pixelData[1];
    pxData[pxPos + 2] = pixelData[2];
    pxData[pxPos + 3] = maxBit;
  },
&nbsp;
  // 4 - RGBA
  // 0: 0, 1: 1, 2: 2, 3: 3
  function (pxData, pixelData, pxPos) {
    pxData[pxPos] = pixelData[0];
    pxData[pxPos + 1] = pixelData[1];
    pxData[pxPos + 2] = pixelData[2];
    pxData[pxPos + 3] = pixelData[3];
  },
];
&nbsp;
function bitRetriever(data, depth) {
  let leftOver = [];
  let i = 0;
&nbsp;
  function split() {
    <span class="missing-if-branch" title="if path not taken" >I</span>if (i === data.length) {
<span class="cstat-no" title="statement not covered" >      throw new Error("Ran out of data");</span>
    }
    let byte = data[i];
    i++;
    let byte8, byte7, byte6, byte5, byte4, byte3, byte2, byte1;
    switch (depth) {
<span class="branch-0 cbranch-no" title="branch not covered" >      default:</span>
<span class="cstat-no" title="statement not covered" >        throw new Error("unrecognised depth");</span>
      case 16:
        byte2 = data[i];
        i++;
        leftOver.push((byte &lt;&lt; 8) + byte2);
        break;
      case 4:
        byte2 = byte &amp; 0x0f;
        byte1 = byte &gt;&gt; 4;
        leftOver.push(byte1, byte2);
        break;
      case 2:
        byte4 = byte &amp; 3;
        byte3 = (byte &gt;&gt; 2) &amp; 3;
        byte2 = (byte &gt;&gt; 4) &amp; 3;
        byte1 = (byte &gt;&gt; 6) &amp; 3;
        leftOver.push(byte1, byte2, byte3, byte4);
        break;
      case 1:
        byte8 = byte &amp; 1;
        byte7 = (byte &gt;&gt; 1) &amp; 1;
        byte6 = (byte &gt;&gt; 2) &amp; 1;
        byte5 = (byte &gt;&gt; 3) &amp; 1;
        byte4 = (byte &gt;&gt; 4) &amp; 1;
        byte3 = (byte &gt;&gt; 5) &amp; 1;
        byte2 = (byte &gt;&gt; 6) &amp; 1;
        byte1 = (byte &gt;&gt; 7) &amp; 1;
        leftOver.push(byte1, byte2, byte3, byte4, byte5, byte6, byte7, byte8);
        break;
    }
  }
&nbsp;
  return {
    get: function (count) {
      while (leftOver.length &lt; count) {
        split();
      }
      let returner = leftOver.slice(0, count);
      leftOver = leftOver.slice(count);
      return returner;
    },
    resetAfterLine: function () {
      leftOver.length = 0;
    },
    end: function () {
      <span class="missing-if-branch" title="if path not taken" >I</span>if (i !== data.length) {
<span class="cstat-no" title="statement not covered" >        throw new Error("extra data found");</span>
      }
    },
  };
}
&nbsp;
function mapImage8Bit(image, pxData, getPxPos, bpp, data, rawPos) {
  // eslint-disable-line max-params
  let imageWidth = image.width;
  let imageHeight = image.height;
  let imagePass = image.index;
  for (let y = 0; y &lt; imageHeight; y++) {
    for (let x = 0; x &lt; imageWidth; x++) {
      let pxPos = getPxPos(x, y, imagePass);
      pixelBppMapper[bpp](pxData, data, pxPos, rawPos);
      rawPos += bpp; //eslint-disable-line no-param-reassign
    }
  }
  return rawPos;
}
&nbsp;
function mapImageCustomBit(image, pxData, getPxPos, bpp, bits, maxBit) {
  // eslint-disable-line max-params
  let imageWidth = image.width;
  let imageHeight = image.height;
  let imagePass = image.index;
  for (let y = 0; y &lt; imageHeight; y++) {
    for (let x = 0; x &lt; imageWidth; x++) {
      let pixelData = bits.get(bpp);
      let pxPos = getPxPos(x, y, imagePass);
      pixelBppCustomMapper[bpp](pxData, pixelData, pxPos, maxBit);
    }
    bits.resetAfterLine();
  }
}
&nbsp;
exports.dataToBitMap = function (data, bitmapInfo) {
  let width = bitmapInfo.width;
  let height = bitmapInfo.height;
  let depth = bitmapInfo.depth;
  let bpp = bitmapInfo.bpp;
  let interlace = bitmapInfo.interlace;
  let bits;
&nbsp;
  if (depth !== 8) {
    bits = bitRetriever(data, depth);
  }
  let pxData;
  if (depth &lt;= 8) {
    pxData = Buffer.alloc(width * height * 4);
  } else {
    pxData = new Uint16Array(width * height * 4);
  }
  let maxBit = Math.pow(2, depth) - 1;
  let rawPos = 0;
  let images;
  let getPxPos;
&nbsp;
  if (interlace) {
    images = interlaceUtils.getImagePasses(width, height);
    getPxPos = interlaceUtils.getInterlaceIterator(width, height);
  } else {
    let nonInterlacedPxPos = 0;
    getPxPos = function () {
      let returner = nonInterlacedPxPos;
      nonInterlacedPxPos += 4;
      return returner;
    };
    images = [{ width: width, height: height }];
  }
&nbsp;
  for (let imageIndex = 0; imageIndex &lt; images.length; imageIndex++) {
    if (depth === 8) {
      rawPos = mapImage8Bit(
        images[imageIndex],
        pxData,
        getPxPos,
        bpp,
        data,
        rawPos
      );
    } else {
      mapImageCustomBit(
        images[imageIndex],
        pxData,
        getPxPos,
        bpp,
        bits,
        maxBit
      );
    }
  }
  if (depth === 8) {
    <span class="missing-if-branch" title="if path not taken" >I</span>if (rawPos !== data.length) {
<span class="cstat-no" title="statement not covered" >      throw new Error("extra data found");</span>
    }
  } else {
    bits.end();
  }
&nbsp;
  return pxData;
};
&nbsp;</pre></td></tr></table></pre>

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                Code coverage generated by
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