Provides various pixel art scaling algorithms used in many console emulators. It's intended for enlarging low-resolution pixel and line art; use on other images may give strange results. The original Scale2x and Scale3x algorithms were developed by Andrea Mazzoleni. The original 2xSaI, Super2xSaI and SuperEagle algorithms developed by Derek Liauw Kie Fa (aka Kreed). There are slight differences between my implementation Kreed's algorithms and the originals. I use the nearest valid pixel fo