Attract Mode test build with improved video rendering

[Oomek]

https://1drv.ms/u/s!Ag7uFeM0f_fzhYhwBiJOVxlXgWbZUg

Please report any issues so I can fix it before making a pull request on Github.

[Oomek]

I forgot to mention. You will see the quality improvement if your movies were recorded in their native resolutions ie. Progetto snaps for Mame

[keilmillerjr]

That gif really shows. Thank you.

[zpaolo11x]

Thank you Oomek, I just checked with my customized CRT shaders (based on Lottes), you can see how the ladder on the right is perfectly clean, aligned to the scanline, while in the previous implementation (image on the bottom) the ladder was aliased.

Great job!

[Tapper]

Quick test, works fine for me so far.

It also seems to correctly grab focus after exiting a MAME game, which was my personal biggest issue before.