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<h1><a href="index.html">All files</a> format-normaliser.js</h1>
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<span class="strong">98.21% </span>
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<span class='fraction'>55/56</span>
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<span class="strong">95.24% </span>
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<span class='fraction'>20/21</span>
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<span class="strong">100% </span>
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<span class='fraction'>4/4</span>
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<span class="strong">97.87% </span>
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<span class='fraction'>46/47</span>
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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">"use strict";
&nbsp;
function dePalette(indata, outdata, width, height, palette) {
let pxPos = 0;
// use values from palette
for (let y = 0; y &lt; height; y++) {
for (let x = 0; x &lt; width; x++) {
let color = palette[indata[pxPos]];
&nbsp;
<span class="missing-if-branch" title="if path not taken" >I</span>if (!color) {
<span class="cstat-no" title="statement not covered" > throw new Error("index " + indata[pxPos] + " not in palette");</span>
}
&nbsp;
for (let i = 0; i &lt; 4; i++) {
outdata[pxPos + i] = color[i];
}
pxPos += 4;
}
}
}
&nbsp;
function replaceTransparentColor(indata, outdata, width, height, transColor) {
let pxPos = 0;
for (let y = 0; y &lt; height; y++) {
for (let x = 0; x &lt; width; x++) {
let makeTrans = false;
&nbsp;
if (transColor.length === 1) {
if (transColor[0] === indata[pxPos]) {
makeTrans = true;
}
} else if (
transColor[0] === indata[pxPos] &amp;&amp;
transColor[1] === indata[pxPos + 1] &amp;&amp;
transColor[2] === indata[pxPos + 2]
) {
makeTrans = true;
}
if (makeTrans) {
for (let i = 0; i &lt; 4; i++) {
outdata[pxPos + i] = 0;
}
}
pxPos += 4;
}
}
}
&nbsp;
function scaleDepth(indata, outdata, width, height, depth) {
let maxOutSample = 255;
let maxInSample = Math.pow(2, depth) - 1;
let pxPos = 0;
&nbsp;
for (let y = 0; y &lt; height; y++) {
for (let x = 0; x &lt; width; x++) {
for (let i = 0; i &lt; 4; i++) {
outdata[pxPos + i] = Math.floor(
(indata[pxPos + i] * maxOutSample) / maxInSample + 0.5
);
}
pxPos += 4;
}
}
}
&nbsp;
module.exports = function (indata, imageData) {
let depth = imageData.depth;
let width = imageData.width;
let height = imageData.height;
let colorType = imageData.colorType;
let transColor = imageData.transColor;
let palette = imageData.palette;
&nbsp;
let outdata = indata; // only different for 16 bits
&nbsp;
if (colorType === 3) {
// paletted
dePalette(indata, outdata, width, height, palette);
} else {
if (transColor) {
replaceTransparentColor(indata, outdata, width, height, transColor);
}
// if it needs scaling
if (depth !== 8) {
// if we need to change the buffer size
if (depth === 16) {
outdata = Buffer.alloc(width * height * 4);
}
scaleDepth(indata, outdata, width, height, depth);
}
}
return outdata;
};
&nbsp;</pre></td></tr></table></pre>
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