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>
12 lines (11 loc) • 405 B
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.Grayscale = function (imageData) {
var data = imageData.data, len = data.length, i, brightness;
for (i = 0; i < len; i += 4) {
brightness = 0.34 * data[i] + 0.5 * data[i + 1] + 0.16 * data[i + 2];
data[i] = brightness;
data[i + 1] = brightness;
data[i + 2] = brightness;
}
};