Emulator

Related to issue 4140

Now that Dolphin supports arbitrary internal resolutions via GameINI settings, a user can sort of simulate SSAA by raising the internal resolution to extreme levels. Unfortunately, this produces a pretty nasty picture with a weird mixture of smooth and jagged lines, thanks to a lack of any kind of downsampling filtration.

A downsampling filter would allow D3D to have SSAA-like functionality without any of the hassles of keeping track of an SSAA resolution. Users could just turn it on, set 4x MSAA, and set the internal resolution for twice their monitor's display, and tada, 4x SSAA! (though inevitably users are going to be confused by the whole 4x isn't 4x horizontal thing, a guide or something would probably be needed)