Flycast: Texture warping in CVSPRO+MVC2 (only on higher resolution)

[Immersion95]

Hi,

Recent commits instroduce texture warpings in some sprites on higher resolution.

Examples :
Ryu's standing pose in MVC2
Chun-Li's standing pose in CVSPRO

These bugs weren't present before, I don't don't know when exactly.

Tested it in Android+Windows (GL+Vulkan).

Thanks !

[aneronds]

I was going to post the same issue, even took a few pictures. As you said, it only happens when the internal res is higher than native, I am using 960. I play these games almost everyday and around a week ago I've updated my cores, I am pretty sure one of the last commits, which added the mipmapping and the power vr filter, is related.

[Immersion95]

Do you know if there is an option to solve this ? Maybe regarding mipmapping ?

[flyinghead]

I doubt this is due to mipmapping as these 2D games don't use mipmaps. And the power VR filter has no effect if disabled. It may be due to this change https://github.com/libretro/flycast/commit/a2137ce23b71b3d13857a770a6f13e6e68158850.

[Immersion95]

Great !

Would it be possible to revert that change ?

[Immersion95]

Any news regarding this issue ? MVC2 can't have increased resolution because of this and it's a shame :p

[flyinghead]

I checked the commit mentioned above and it's not the culprit.

I went further back in the commit history and I can't find any version that doesn't have glitch when upscaling this game.

[Immersion95]

What is the last one that you tested ? I'm almost certain that it wasn't there 1 year ago.

[flyinghead]

I can't remember where I stopped exactly. Probably late 2019/early 2020.

[Immersion95]

Hi, is there anyway to pinpoint this problem ? I would love to try the different revisions to find where it fails but I don't know how to build those. Is there any guide I could follow ? Thanks !