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From: Knute Johnson <nospam@rabbitbrush.frazmtn.com>
Newsgroups: comp.lang.java.programmer
Subject: Re: Can you resize with BufferedImage
Date: Thu, 13 Apr 2017 11:10:08 -0500
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On 4/12/2017 10:20, Eric Douglas wrote:
>
> I've never used an AffineTransformOp. To change the size of an image
> I just generate a new image of the width/height/transparency I want.
> Then I get the Graphics of the new image, cast it to a Graphics2D,
> create a new AffineTransform, and set the translate/scale/rotate I
> want.  Then I call .setComposite(AlphaComposite.SrcOver) on the new
> image's Graphics2D, then just .drawImage() passing in the old image,
> the AffineTransform I just created, and the observer (normally
> null).
>
> Normally you want to maintain proportions, your x and y for the scale
> are both Math.min(newWidth / originalImageWidth, newHeight /
> originalImageHeight).
>

I've done it that way too.  I don't really know which is faster.

-- 

Knute Johnson