Scandoubler scanlines fx fail on some cores when video is rotated

[dfilskov]

When you rotate the video signal in a core's OSD the scanlines fx for the Scandoubler setting stops working.

[birdybro]

I believe this is due to how ascal is handling the OSD's HQ2x/Scanlines effects. And if you use vertical scanline filters instead as an alternative, I think I remember it will look very bad if you don't use integer scaling, as even though the image is rotated it's still scaling vertically to your display as opposed to horizontally. So download the filters from the github, go to the scanlines vertical folder, and when you rotate OSD it should work. If it doesn't then something must have changed not too long ago.

https://github.com/MiSTer-devel/Filters_MiSTer

https://github.com/MiSTer-devel/Filters_MiSTer/tree/master/Filters/Scanlines%20(Vertical)

There's the vertical scanlines you should try to put in /media/fat/Filters folder. Example of vertical scanlines filter below:

[dfilskov]

Wait - it's only some cores. E.g. BombJack and Donkey Kong - custom filters seem to work on all cores but the OSD's Scandoubler fx 'scanlines' work on other cores (but not the two above) like Arkanoid and Burning Rubber.

[sorgelig]

Not all arcade cores updated to latest framework yet. Updated cores have scanlines FX working for both horizontal and vertical orientations.

[dfilskov]

Are you sure this is the case for the non-custom scandoubler FX? - the "built-in" setting in all cores (not the ones where you load an fx from storage)

[jotego]

I suppose this issue is fixed by now (2 years later) on the individual cores. I propose to close it.