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Editorial Team
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Asked: 2026-05-27T10:16:01+00:00

Is there an easy way to shift canvas contents to the left, dropping the

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Is there an easy way to shift canvas contents to the left, dropping the leftmost pixels and moving all others to the left?

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  1. Editorial Team

    Using getImageData and putImageData you could easily implement a pixel-by-pixel shift. For instance:

    // shift everything to the left:
var imageData = context.getImageData(1, 0, context.canvas.width-1, context.canvas.height);
context.putImageData(imageData, 0, 0);
// now clear the right-most pixels:
context.clearRect(context.canvas.width-1, 0, 1, context.canvas.height);
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