zhangjy
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FKJ-HHArome


			
				
					
						
						
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    <title>Code coverage report for png.js</title>
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        <h1><a href="index.html">All files</a> png.js</h1>
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            <div class='fl pad1y space-right2'>
                <span class="strong">54.17% </span>
                <span class="quiet">Statements</span>
                <span class='fraction'>52/96</span>
            </div>
        
            
            <div class='fl pad1y space-right2'>
                <span class="strong">41.18% </span>
                <span class="quiet">Branches</span>
                <span class='fraction'>14/34</span>
            </div>
        
            
            <div class='fl pad1y space-right2'>
                <span class="strong">56.25% </span>
                <span class="quiet">Functions</span>
                <span class='fraction'>9/16</span>
            </div>
        
            
            <div class='fl pad1y space-right2'>
                <span class="strong">56.52% </span>
                <span class="quiet">Lines</span>
                <span class='fraction'>52/92</span>
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            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>
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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 util = require("util");
let Stream = require("stream");
let Parser = require("./parser-async");
let Packer = require("./packer-async");
let PNGSync = require("./png-sync");
&nbsp;
let PNG = (exports.PNG = function (options) {
  Stream.call(this);
&nbsp;
  options = options || {}; // eslint-disable-line no-param-reassign
&nbsp;
  // coerce pixel dimensions to integers (also coerces undefined -&gt; 0):
  this.width = options.width | 0;
  this.height = options.height | 0;
&nbsp;
  this.data =
    this.width &gt; 0 &amp;&amp; this.height &gt; 0
      ? Buffer.alloc(4 * this.width * this.height)
      : null;
&nbsp;
  <span class="missing-if-branch" title="if path not taken" >I</span>if (options.fill &amp;&amp; <span class="branch-1 cbranch-no" title="branch not covered" >this.data)</span> {
<span class="cstat-no" title="statement not covered" >    this.data.fill(0);</span>
  }
&nbsp;
  this.gamma = 0;
  this.readable = this.writable = true;
&nbsp;
  this._parser = new Parser(options);
&nbsp;
  this._parser.on("error", this.emit.bind(this, "error"));
  this._parser.on("close", this._handleClose.bind(this));
  this._parser.on("metadata", this._metadata.bind(this));
  this._parser.on("gamma", this._gamma.bind(this));
  this._parser.on(
    "parsed",
    function (data) {
      this.data = data;
      this.emit("parsed", data);
    }.bind(this)
  );
&nbsp;
  this._packer = new Packer(options);
  this._packer.on("data", this.emit.bind(this, "data"));
  this._packer.on("end", this.emit.bind(this, "end"));
  this._parser.on("close", this._handleClose.bind(this));
  this._packer.on("error", this.emit.bind(this, "error"));
});
util.inherits(PNG, Stream);
&nbsp;
PNG.sync = PNGSync;
&nbsp;
PNG.prototype.pack = function () {
  <span class="missing-if-branch" title="if path not taken" >I</span>if (!this.data || !this.data.length) {
<span class="cstat-no" title="statement not covered" >    this.emit("error", "No data provided");</span>
<span class="cstat-no" title="statement not covered" >    return this;</span>
  }
&nbsp;
  process.nextTick(
    function () {
      this._packer.pack(this.data, this.width, this.height, this.gamma);
    }.bind(this)
  );
&nbsp;
  return this;
};
&nbsp;
PNG.prototype.parse = <span class="fstat-no" title="function not covered" >fu</span>nction (data, callback) {
<span class="cstat-no" title="statement not covered" >  if (callback) {</span>
    let onParsed, onError;
&nbsp;
<span class="cstat-no" title="statement not covered" >    onParsed = <span class="fstat-no" title="function not covered" >fu</span>nction (parsedData) {</span>
<span class="cstat-no" title="statement not covered" >      this.removeListener("error", onError);</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >      this.data = parsedData;</span>
<span class="cstat-no" title="statement not covered" >      callback(null, this);</span>
    }.bind(this);
&nbsp;
<span class="cstat-no" title="statement not covered" >    onError = <span class="fstat-no" title="function not covered" >fu</span>nction (err) {</span>
<span class="cstat-no" title="statement not covered" >      this.removeListener("parsed", onParsed);</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >      callback(err, null);</span>
    }.bind(this);
&nbsp;
<span class="cstat-no" title="statement not covered" >    this.once("parsed", onParsed);</span>
<span class="cstat-no" title="statement not covered" >    this.once("error", onError);</span>
  }
&nbsp;
<span class="cstat-no" title="statement not covered" >  this.end(data);</span>
<span class="cstat-no" title="statement not covered" >  return this;</span>
};
&nbsp;
PNG.prototype.write = function (data) {
  this._parser.write(data);
  return true;
};
&nbsp;
PNG.prototype.end = function (data) {
  this._parser.end(data);
};
&nbsp;
PNG.prototype._metadata = function (metadata) {
  this.width = metadata.width;
  this.height = metadata.height;
&nbsp;
  this.emit("metadata", metadata);
};
&nbsp;
PNG.prototype._gamma = function (gamma) {
  this.gamma = gamma;
};
&nbsp;
PNG.prototype._handleClose = function () {
  <span class="missing-if-branch" title="if path not taken" >I</span>if (!this._parser.writable &amp;&amp; !this._packer.readable) {
<span class="cstat-no" title="statement not covered" >    this.emit("close");</span>
  }
};
&nbsp;
PNG.bitblt = <span class="fstat-no" title="function not covered" >fu</span>nction (src, dst, srcX, srcY, width, height, deltaX, deltaY) {
  // eslint-disable-line max-params
  // coerce pixel dimensions to integers (also coerces undefined -&gt; 0):
  /* eslint-disable no-param-reassign */
<span class="cstat-no" title="statement not covered" >  srcX |= 0;</span>
<span class="cstat-no" title="statement not covered" >  srcY |= 0;</span>
<span class="cstat-no" title="statement not covered" >  width |= 0;</span>
<span class="cstat-no" title="statement not covered" >  height |= 0;</span>
<span class="cstat-no" title="statement not covered" >  deltaX |= 0;</span>
<span class="cstat-no" title="statement not covered" >  deltaY |= 0;</span>
  /* eslint-enable no-param-reassign */
&nbsp;
<span class="cstat-no" title="statement not covered" >  if (</span>
    srcX &gt; src.width ||
    srcY &gt; src.height ||
    srcX + width &gt; src.width ||
    srcY + height &gt; src.height
  ) {
<span class="cstat-no" title="statement not covered" >    throw new Error("bitblt reading outside image");</span>
  }
&nbsp;
<span class="cstat-no" title="statement not covered" >  if (</span>
    deltaX &gt; dst.width ||
    deltaY &gt; dst.height ||
    deltaX + width &gt; dst.width ||
    deltaY + height &gt; dst.height
  ) {
<span class="cstat-no" title="statement not covered" >    throw new Error("bitblt writing outside image");</span>
  }
&nbsp;
<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>
<span class="cstat-no" title="statement not covered" >    src.data.copy(</span>
      dst.data,
      ((deltaY + y) * dst.width + deltaX) &lt;&lt; 2,
      ((srcY + y) * src.width + srcX) &lt;&lt; 2,
      ((srcY + y) * src.width + srcX + width) &lt;&lt; 2
    );
  }
};
&nbsp;
PNG.prototype.bitblt = <span class="fstat-no" title="function not covered" >fu</span>nction (
  dst,
  srcX,
  srcY,
  width,
  height,
  deltaX,
  deltaY
) {
  // eslint-disable-line max-params
&nbsp;
<span class="cstat-no" title="statement not covered" >  PNG.bitblt(this, dst, srcX, srcY, width, height, deltaX, deltaY);</span>
<span class="cstat-no" title="statement not covered" >  return this;</span>
};
&nbsp;
PNG.adjustGamma = <span class="fstat-no" title="function not covered" >fu</span>nction (src) {
<span class="cstat-no" title="statement not covered" >  if (src.gamma) {</span>
<span class="cstat-no" title="statement not covered" >    for (let y = <span class="cstat-no" title="statement not covered" >0;</span> y &lt; src.height; y++) {</span>
<span class="cstat-no" title="statement not covered" >      for (let x = <span class="cstat-no" title="statement not covered" >0;</span> x &lt; src.width; x++) {</span>
        let idx = <span class="cstat-no" title="statement not covered" >(src.width * y + x) &lt;&lt; 2;</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >        for (let i = <span class="cstat-no" title="statement not covered" >0;</span> i &lt; 3; i++) {</span>
          let sample = <span class="cstat-no" title="statement not covered" >src.data[idx + i] / 255;</span>
<span class="cstat-no" title="statement not covered" >          sample = Math.pow(sample, 1 / 2.2 / src.gamma);</span>
<span class="cstat-no" title="statement not covered" >          src.data[idx + i] = Math.round(sample * 255);</span>
        }
      }
    }
<span class="cstat-no" title="statement not covered" >    src.gamma = 0;</span>
  }
};
&nbsp;
PNG.prototype.adjustGamma = <span class="fstat-no" title="function not covered" >fu</span>nction () {
<span class="cstat-no" title="statement not covered" >  PNG.adjustGamma(this);</span>
};
&nbsp;</pre></td></tr></table></pre>

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