lens-filter-gamma
Version:
Small library to apply a gamma filter to a image
169 lines (168 loc) • 6.46 kB
HTML
<html lang="en">
<head>
<title>Code coverage report for index.js</title>
<meta charset="utf-8" />
<link rel="stylesheet" href="prettify.css" />
<link rel="stylesheet" href="base.css" />
<meta name="viewport" content="width=device-width, initial-scale=1">
<style type='text/css'>
.coverage-summary .sorter {
background-image: url(sort-arrow-sprite.png);
}
</style>
</head>
<body>
<div class='wrapper'>
<div class='pad1'>
<h1>
<a href="index.html">All files</a> index.js
</h1>
<div class='clearfix'>
<div class='fl pad1y space-right2'>
<span class="strong">100% </span>
<span class="quiet">Statements</span>
<span class='fraction'>9/9</span>
</div>
<div class='fl pad1y space-right2'>
<span class="strong">100% </span>
<span class="quiet">Branches</span>
<span class='fraction'>6/6</span>
</div>
<div class='fl pad1y space-right2'>
<span class="strong">100% </span>
<span class="quiet">Functions</span>
<span class='fraction'>2/2</span>
</div>
<div class='fl pad1y space-right2'>
<span class="strong">100% </span>
<span class="quiet">Lines</span>
<span class='fraction'>9/9</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.
</p>
</div>
<div class='status-line high'></div>
<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>
<a name='L3'></a><a href='#L3'>3</a>
<a name='L4'></a><a href='#L4'>4</a>
<a name='L5'></a><a href='#L5'>5</a>
<a name='L6'></a><a href='#L6'>6</a>
<a name='L7'></a><a href='#L7'>7</a>
<a name='L8'></a><a href='#L8'>8</a>
<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>
<a name='L16'></a><a href='#L16'>16</a>
<a name='L17'></a><a href='#L17'>17</a>
<a name='L18'></a><a href='#L18'>18</a>
<a name='L19'></a><a href='#L19'>19</a>
<a name='L20'></a><a href='#L20'>20</a>
<a name='L21'></a><a href='#L21'>21</a>
<a name='L22'></a><a href='#L22'>22</a>
<a name='L23'></a><a href='#L23'>23</a>
<a name='L24'></a><a href='#L24'>24</a>
<a name='L25'></a><a href='#L25'>25</a>
<a name='L26'></a><a href='#L26'>26</a>
<a name='L27'></a><a href='#L27'>27</a>
<a name='L28'></a><a href='#L28'>28</a>
<a name='L29'></a><a href='#L29'>29</a>
<a name='L30'></a><a href='#L30'>30</a>
<a name='L31'></a><a href='#L31'>31</a>
<a name='L32'></a><a href='#L32'>32</a>
<a name='L33'></a><a href='#L33'>33</a>
<a name='L34'></a><a href='#L34'>34</a></td><td class="line-coverage quiet"><span class="cline-any cline-neutral"> </span>
<span class="cline-any cline-neutral"> </span>
<span class="cline-any cline-neutral"> </span>
<span class="cline-any cline-neutral"> </span>
<span class="cline-any cline-neutral"> </span>
<span class="cline-any cline-neutral"> </span>
<span class="cline-any cline-neutral"> </span>
<span class="cline-any cline-neutral"> </span>
<span class="cline-any cline-neutral"> </span>
<span class="cline-any cline-yes">1x</span>
<span class="cline-any cline-yes">1x</span>
<span class="cline-any cline-yes">1x</span>
<span class="cline-any cline-yes">1x</span>
<span class="cline-any cline-yes">1x</span>
<span class="cline-any cline-neutral"> </span>
<span class="cline-any cline-neutral"> </span>
<span class="cline-any cline-yes">1x</span>
<span class="cline-any cline-neutral"> </span>
<span class="cline-any cline-neutral"> </span>
<span class="cline-any cline-neutral"> </span>
<span class="cline-any cline-neutral"> </span>
<span class="cline-any cline-neutral"> </span>
<span class="cline-any cline-neutral"> </span>
<span class="cline-any cline-neutral"> </span>
<span class="cline-any cline-neutral"> </span>
<span class="cline-any cline-neutral"> </span>
<span class="cline-any cline-neutral"> </span>
<span class="cline-any cline-yes">4x</span>
<span class="cline-any cline-yes">3x</span>
<span class="cline-any cline-neutral"> </span>
<span class="cline-any cline-neutral"> </span>
<span class="cline-any cline-yes">1x</span>
<span class="cline-any cline-neutral"> </span>
<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">import { applyFilter } from 'lens-core';
/**
* Iterate over the array applying the gamma transformation
* @param {Object} data
* @param {Number} length
* @param {Object} options
* @param {Number} [options.level]
*/
export const transform = ({ data, length, options }) => {
for (let i = 0; i < length; i += 4) {
data[i] = Math.pow(data[i] / 255, options.level) * 255;
data[i + 1] = Math.pow(data[i + 1] / 255, options.level) * 255;
data[i + 2] = Math.pow(data[i + 2] / 255, options.level) * 255;
}
return data;
};
/**
* @param {ImageData} data - data of a image extracted from a canvas
* @param {Object} options - options to pass to the transformation function
* @param {Number} [options.level] - level to apply in the transformation
* @param {Number} nWorkers - number of workers
* @returns {Promise}
*/
export default function gamma({ data, options, nWorkers } = {}) {
if (!data || !options || !options.level) {
throw new Error('lens-filter-gamma:: invalid options provided');
}
return applyFilter({ data, transform, options, nWorkers });
}
</pre></td></tr>
</table></pre>
<div class='push'></div><!-- for sticky footer -->
</div><!-- /wrapper -->
<div class='footer quiet pad2 space-top1 center small'>
Code coverage
generated by <a href="https://istanbul.js.org/" target="_blank">istanbul</a> at Sat Jun 09 2018 21:45:56 GMT+0100 (WEST)
</div>
</div>
<script src="prettify.js"></script>
<script>
window.onload = function () {
if (typeof prettyPrint === 'function') {
prettyPrint();
}
};
</script>
<script src="sorter.js"></script>
<script src="block-navigation.js"></script>
</body>
</html>