Resizing distortions, even with correct technique

[SolarB]

Hi all,

I'm thinking of making my game 8bit-like so I ran an experiment. My window is 320 x 240 and I have options to resize to the standard 4:3 resolutions, 640x480, 800x600 etc. using the window resize object and the WinX/YSize-ClientWidth technique to resize the frame correctly. Lo and behold distortions are noticeable, especially at 800 and 1024. Shouldn't be happening right? Aspect (1.33333) is the same, so what's the deal?

Obviously no AA is used for the 8bit look.

Example:
http://www.mediafire.com/?kzlun030q6fwgrz


Any clues?


Cheers

[Jacob]

Distortion happens because resizing from 320 to 800 means each original pixel now takes up 2.5 pixels and resizing from 320 to 1024 now takes up 3.2 pixels. With 640, each pixel takes up a clean 2 pixels which makes everything look smooth and undistorted.

[SolarB]

Is there a workaround? I want that DOSy feel and it's just not right without the standard res's. How would I find the nearest non-distorted size (that's not a 2x)?