konva
Version:
<p align="center"> <img src="https://raw.githubusercontent.com/konvajs/konvajs.github.io/master/apple-touch-icon-180x180.png" alt="Konva logo" height="180" /> </p>
25 lines (23 loc) • 548 B
JavaScript
(function() {
'use strict';
/**
* Invert Filter
* @function
* @memberof Konva.Filters
* @param {Object} imageData
* @example
* node.cache();
* node.filters([Konva.Filters.Invert]);
*/
Konva.Filters.Invert = function(imageData) {
var data = imageData.data, len = data.length, i;
for (i = 0; i < len; i += 4) {
// red
data[i] = 255 - data[i];
// green
data[i + 1] = 255 - data[i + 1];
// blue
data[i + 2] = 255 - data[i + 2];
}
};
})();