CODEWITHSUNDEEP
javascripthtmlcanvas
Tom
Tom

Reputation: 2661

difference between clear and fill a rectangle with background color in canvas

I have a canvas with white background. So when I want to clear it, is there a difference between using

clearRect();
fillStyle="#FFFFFF";
fillRect();

and

fillStyle="#FFFFFF";
fillRect();

Is using any of them considered a better practice or has an effect on the outcome of getImageData()?

Upvotes: 3

Views: 1522

Answers (1)

Brady Cartmell
Brady Cartmell

Reputation: 607

If you don't clear it first, you'll be drawing on top of what was previously there. If you not using any transparencies, maybe this is OK.

Another difference is that clearRect() doesn't use a white background. it uses a transparent one.

Upvotes: 2

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