[Feature Request] HQ2X / XBR... support

[bidinou]

Hi Rok !

I'm well aware it's probably not trivial and would require a big amount of work, but I'd like to suggest it anyway as I think it could make a huge difference :-)

The NES core for the MiST features an "HQ2X" filter which upscales the picture and tries to guess & its shapes. In combination with scanlines it can give a good result. Some people might not like it but in some cases it looks great and hurts much less one's eyes. As this is already implemented in the NES core would it be possible to port it to the Minimig core ?

More recently I had the opportunity to try tons of pixel shaders combinations on RetroArch. I figured out a combination which gave an absolutely incredible result : combining an "XBR" filter with a "scanlines" one.

Please let me show you an example ; here combining "xbr level 2" and "crt-lottes" (which is a pixel shader mimicking CRT screen -- but it would already look awesome with regular scanlines)
http://hpics.li/756dce0
http://hpics.li/b40ee3d

I have no idea what can be achieved :-) But it's quite incredible to see that games in 320x240 can look great again on modern screens.

Cheers ! And thanks again so much for your work !