obelisk.js/src/utils/CanvasTool.js

JavaScript Library for Building Pixel Isometric Element with HTML5 Canvas

/*jslint node: true*/

'use strict';

var CanvasTool, p;

CanvasTool = function () {
    throw new Error('CanvasTool is a static Class, cannot be instanced.');
};
p = CanvasTool;

// public methods
p.getPixel = function (imageData, x, y) {
    var data, index, r, g, b;

    data = imageData.data;
    index = (y * imageData.width + x) * 4;
    r = data[index];
    g = data[index + 1];
    b = data[index + 2];

    return ((r << 16) | (g << 8) | b);
};

p.toString = function () {
    return '[CanvasTool]';
};

module.exports = CanvasTool;