konva
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<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>
13 lines (12 loc) • 589 B
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
var Factory_1 = require("../Factory");
var Node_1 = require("../Node");
var Validators_1 = require("../Validators");
exports.Posterize = function (imageData) {
var levels = Math.round(this.levels() * 254) + 1, data = imageData.data, len = data.length, scale = 255 / levels, i;
for (i = 0; i < len; i += 1) {
data[i] = Math.floor(data[i] / scale) * scale;
}
};
Factory_1.Factory.addGetterSetter(Node_1.Node, 'levels', 0.5, Validators_1.getNumberValidator(), Factory_1.Factory.afterSetFilter);