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From: Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups: comp.lang.c
Subject: Re: Which code style do you prefer the most?
Date: Tue, 4 Mar 2025 03:16:24 -0000 (UTC)
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On Mon, 3 Mar 2025 12:29:22 +0000, bart wrote:

> It depends on the aspect ratio of the pixels. But from I remember, in
> 640x480 mode, they were square ...

This is just shorthand for saying the pixel density is uniform, i.e. the 
same horizontally and vertically.

Remember, pixels have no shape. In ideal sampling, they are dimensionless 
points.

Those “pixels” you see on your screen are shaped by what’s called the 
“reconstruction function”. This takes the set of sample values to generate 
an analog image which is some approximation of the original input image 
(if the input came from an image of the real world).