#433 Video artifacts rendering

[Chrom]

Just like the audio leak emulation that is already implemented, I suggest implementing some common VIC-II and related video hardware artifacts in VICE. This would add great realism to the end user experience. In particular I suggest some or all of the following:

VIC-II related

• jailbars

Video output circuits related

• chroma leak on luminance output
• dot crawl (https://www.avartifactatlas.com/artifacts/dot_crawl.html)

CRT related

• vignette
• bloom ( https://www.youtube.com/watch?v=wgHQVowZBm4)
• barrel distortion
• border smoothing (namely, outward smoothing of the pixels close to the 4 edges of the rendered screen)

It would also be great if the strenght of the rendering was configurable for each of the effects. In my opinion the CRT related effects are the most important and should be considered first

Attaching some real world HW pics, just for reference