Changes

These are shaders designed to detect and smooth [[dithering]]. [https://github.com/libretro/common-shaders/tree/master/dithering mdapt] is a popular one.There is also newer gdapt.

This shader is supposed to appear the same as nearest neighbor (aka "unfiltered"), except with minor corrections when using a non-integer scale that are increasingly less noticeable the higher it is scaled. This shader is very useful to anyone who wants to keep things as sharp as possible without worrying about scale factors. Available in [httphttps://gitoriousgithub.orgcom/bsneshizzlekizzle/xmlquark-shaders/blobstree/master/shaders/OpenGL/v1.0/Pixellate.shader XMLQuark] and [https://github.com/libretro/common-shaders/blob/master/retro/shaders/pixellate.cg Cg] shader formats.