Re: [pygame] hq3x magnification algorithm

[Pete Shinners <pete@shinners.org>]

Eric Burgess wrote:
> "hq3x" is the name of a very cool algorithm for enlarging low-color 
> (cartoonish) low-resolution images.
Yes, I've checked this out. Currently pygame has a builtin version of 
the "AdvanceMAME Scale2x". I think these hq scaling algorithms are 
better because they work on 'similar' colors. The AdvanceMAME only does 
its magic on exact matching colors, which means gradients make it work 
like a regular pixel doubler.

I've been thinking about replacing the current scale2x with the one 
found at hiend3d. There is also a 3x and 4x scaler which wouldn't be bad 
to add if it happens.

Anyways, you can experiment with pygame.transform.scale2x. I have a few 
example images online. My game entry for the recent 48 hour contest made 
good use of the scale2x algorithm.

http://www.pygame.org/ftp/contrib/scalecompare.png
http://www.pygame.org/ftp/contrib/scalecompare2.png