48 lines
1.4 KiB
Groff
48 lines
1.4 KiB
Groff
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/**
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* Part of Picozu Image Editing application.
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* Visit https://www.picozu.com for more info.
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* The code is copyrighted by Picozu <www.picozu.com>.
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*
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* @version 1.1.121413
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* @package Workers
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* @application Picozu <www.picozu.com>
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* @license www.picozu.com/license
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*/
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importScripts('quantize.js');
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self.addEventListener('message', function(e) {
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function process(data) {
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data.params.numcolors = (typeof data.params.numcolors != 'undefined') ? data.params.numcolors : 29;
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return {
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colors: loadSwatches(data.imageData, data.params.numcolors)
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};
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}
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self.postMessage(process(e.data));
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}, false);
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function loadSwatches(image, colorCount) {
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var pixels = image.data;
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var pixelCount = image.width * image.height;
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var pixelArray = [];
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for (var i = 0, offset, r, g, b, a; i < pixelCount; i++) {
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offset = i * 4;
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r = pixels[offset + 0];
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g = pixels[offset + 1];
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b = pixels[offset + 2];
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a = pixels[offset + 3];
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if (a >= 125) {
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if (!(r > 250 && g > 250 && b > 250)) {
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pixelArray.push([r, g, b]);
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}
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}
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}
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var cmap = MMCQ.quantize(pixelArray, colorCount);
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if (cmap) {
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var palette = cmap.palette();
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return palette;
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}
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else {
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return null;
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}
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}
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