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libretro / common-shaders

Collection of commonly used Cg shaders. These shaders are usable by either HLSL and/or Cg runtime compilers. The cg2glsl script will translate most of these into GLSL shaders.
http://www.libretro.com
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4x internal and up = lag #106

Closed Mickevincent closed 7 years ago

Mickevincent commented 7 years ago

Hello, I just have a question about mednafen in retroarch. I try to run games in 4 times internal but it causes lag no matter what I do. I have tried with threaded video on and it makes it better, but not enough. (I also have to turn that off in the config before restarting retroarch, because otherwise it crashes.) It wont let me chose hardware rendering as a video option, only software. I dont know if that would fix it anyway. My cpu is a i7 4790k and gpu a gtx 980ti and no other game is causing trouble, so it has nothing to do with drivers I suppose. I have also tried different versions on retroarch without succes. I also emulated ps1 in 1999 on my Pentium 2 without much trouble so this does not make any sense. What am I doing wrong?

TheOligopolist commented 7 years ago

Are you using the PSX HW core? The PSX core runs in software and scaling the resolution is going to result in a very large performance hit. The PSX HW core is not as accurate but you should be able to bump up the resolution with no significant performance impact.

hizzlekizzle commented 7 years ago

This isn't really the right repo for that question, but I'll answer it anyway :)

If you're using the non-HW core, the resolution increases are happening in software, which taxes the CPU exponentially for each increase (it's software rendering). With the *-HW core, it should handle resolution increases with your GPU via either OpenGL or Vulkan, depending on the video driver you've selected in settings > driver and the core option.

FAKEDIT: ninja'ed :)

Mickevincent commented 7 years ago

Thanx guys. But it doesnt do any difference and still says "software" as renderer. I cannot change it to hardware. I would really need some help with why "threaded video" wont work either. Every single time I start retroarch if that one is checked, I get an error about "win 32 exception occured" etc in "retroarch.exe [1632]. Extremely annoying. Also I wonder, is it possible to make Retroarch change the resolution to 4k automaticly when I start it so I don't have to change it in windows display settings? Sorry If this is alot but I would be glad if someone could help me out here. Its ok if someone delets this since this was not the correct place to ask.

hizzlekizzle commented 7 years ago

Make sure you load the beetle-psx-hw core.

Threaded video isn't typically something you would want. I wouldn't worry about it if I were you.

In your retroarch.cfg, there are settings for video_fullscreen_x/y. If you set those to the 4K resolution (that is, 3840 and 2160, respectively), RetroArch will try to set the mode to 4K when you enter exclusive fullscreen (that is, make sure 'windowed fullscreen' isn't enabled).

Mickevincent commented 7 years ago

I do load the hw - core, but it wont work. Maybe I would not need threaded video if it would work with hardware mode, but as it wont work.. well then I kinda have to use the threaded video mode. I will check out that in the config. Thanx for your help.

*edit - Ok, fullscreen 4k works nice. And somehow it makes the games run better aswell. Thanx alot!