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Editorial Team
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Asked: 2026-06-15T13:09:29+00:00

I’d like to be able to make an empty PixelArray to compare with output

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I’d like to be able to make an empty PixelArray to compare with output from node-canvas from within JavaScript.

For example:

var cleanData = new PixelArray ( 20 );

Is this possible? Am I on the wrong version of Node.js? (0.8.3)

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1 Answer

  1. Editorial Team

    Uint8ClampedArray works.

    var cleanData = new Uint8ClampedArray( width * height * 4 );

    Some background:

    http://www.khronos.org/registry/typedarray/specs/latest/#7.1  Uint8ClampedArray is defined in order to replace CanvasPixelArray. It behaves identically to the other typed array views, except that the setters and constructor use clamping [WEBIDL] rather than modulo arithmetic when converting incoming number values.

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