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In any case, I think these algorithms are really good to upscale old graphics/sprites, not necessarily in real time.
Sorry the thread got sidetracked. I think they're getting good results with their algorithm but I do like the retention of the pixels with the Hq4x method - that looks really neat.
I agree, the Hqx algorithm is really good, probably the best.It'd be great to have a Photoshop plugin with these scaling filters...
@Javi: sorry to hijack the thread! Yes, hqx looks great. I wonder if that's what Gideros implements when you set filtering=true for textures.