Thanks a lot, i will try with that library, for png images i use libpng. Next i would consider the gamma factor in scaling operations, in games, is it necessary???

yes but, i get different results using both. Look these. This is from your ScalerTest (observe the yellow letters) http://imgur.com/GUGTDin And this is my result http://imgur.com/C64PRXR Did you make another step with the nearestNeighborScale() or equalColor() function?

jimbo1qaz, me too. I'm trying to make a wrapper for this code, but, between your Scaler and the ZenJu Scaler, generates diferent images, Zenju, Can you help us showing your ScalerTest source code? I'm coding it in MinGW