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GianlucaGuarini / jQuery.BlackAndWhite

Clientside grayscale images on any browser
http://gianlucaguarini.github.io/jQuery.BlackAndWhite/
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BnWWorker.js:4 Uncaught TypeError: Cannot read property 'data' of undefined at onmessage #69

Open maschad96 opened 7 years ago

maschad96 commented 7 years ago 

    var imagedata = event.data.imgData,
        intensity = event.data.intensity,
        px = imagedata.data, // The line throwing the error. Could you help address this?
        grey = null,
        length = px.length;

    for (var i = 0; i < length; i += 4) {
        var k = px[i] * 0.3 + px[i + 1] * 0.59 + px[i + 2] * 0.11;
        px[i] = ~~ (k * intensity + px[i] * (1 - intensity));
        px[i + 1] = ~~ (k * intensity + px[i + 1] * (1 - intensity));
        px[i + 2] = ~~ (k * intensity + px[i + 2] * (1 - intensity));
    }

    postMessage(imagedata);

};