How does copy() sample?

I'm smashing a 640x480 image down to 32x24. Then I try to display the smashed image at a large size to show the effect.
When it's making the large image smaller I'd like it to average the pixels, maybe even weighted by distance. When it's making a small image larger I'd like it to sample absolutely (crisp edges between color boundaries). Is there a setting I didn't see to enable this behavior?

I'm using it for this: 2mx1.5m RGB LEDs. Trying to preview the output before I connect to the DIY jumbotron.


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