Log calls made to HTML Canvas context (only works with 2D)

canvas-logger.js

function hookCanvasGetContext () {
    var ctxFns = [
        'fillRect',
        'save',
        'restore',
        'scale',
        'rotate',
        'translate',
        'transform',
        'setTransform',
        'resetTransform',
        'createLinearGradient',
        'createRadialGradient',
        'createPattern',
        'clearRect',
        'strokeRect',
        'beginPath',
        'fill',
        'stroke',
        'drawFocusIfNeeded',
        'clip',
        'isPointInPath',
        'isPointInStroke',
        'fillText',
        'strokeText',
        'measureText',
        'drawImage',
        'createImageData',
        'getImageData',
        'putImageData',
        'getContextAttributes',
        'setLineDash',
        'getLineDash',
        'setAlpha',
        'setCompositeOperation',
        'setLineWidth',
        'setLineCap',
        'setLineJoin',
        'setMiterLimit',
        'clearShadow',
        'setStrokeColor',
        'setFillColor',
        'drawImageFromRect',
        'setShadow',
        'closePath',
        'moveTo',
        'lineTo',
        'quadraticCurveTo',
        'bezierCurveTo',
        'arcTo',
        'rect',
        'arc',
        'ellipse',
        'scrollPathIntoView',
        'addHitRegion',
        'removeHitRegion',
        'clearHitRegions',
        'isContextLost'
    ];

    var origGetContext = HTMLCanvasElement.prototype.getContext;
    var callsMade = [];

    function hookFunc (ctx, name) {
        var origFn = ctx[name];
        ctx[name] = function () {
            callsMade.push([name, arguments]);
            return origFn.apply(this, arguments);
        };
    }

    window.printCanvasCalls = function () {
        callsMade.forEach(function (c) {
            console.log(c[0], c[1]);
        })
    };

    HTMLCanvasElement.prototype.getContext = function () {
        var ctx = origGetContext.apply(this, arguments);
        ctxFns.forEach(function (fnName) {
            hookFunc(ctx, fnName);
        });
        
        return ctx;
    }
}