Porting to PS4

[mikolajmikolajczyk]

Hi!
I wanted to share that I started a port for PS4. It is in very early stages of development but I have small portion to show already.

https://github.com/user-attachments/assets/3b36c4b5-94b7-4aa6-b247-1efc78c197fb
https://github.com/user-attachments/assets/b473c1c8-d37d-473f-9fc5-efe34c09dc79

I will ofcourse share the code if there is any interest. I need to clean it up though as its crazily entangled right now and not maintainable.

[Try]

Hi, @mikolajmikolajczyk !

Very interesting stuff!

I will ofcourse share the code if there is any interest

There is an interest, however I'm not sure if sony's NDA allows to. From what I know they do not allow to share api-details, even indirectly by publishing code that uses it.

[mikolajmikolajczyk]

I'm using only https://github.com/openorbis toolchain + a lot of https://github.com/unemu-org/oracles + https://github.com/unemu-org/amdllpc-gfx7 to compile OpenGothic shaders.

I'm not touching NDA stuff at all 😄

[mikolajmikolajczyk]

Small update from me.

Gothic_3.mp4

Rendering seems to work fine now. Although I get 19-20 fps. Need more optimizations on renderer side. These stop motions are there because my logger is in the same thread as renderer and it scrapes at intervals you see on the video.

[mikolajmikolajczyk]

New update from me. Instead of custom graphics backend I decided to port mesa driver into ps4 (oh I was not really smart to do that :D). It works after a week of tinkering and I hope to use it to port other games too. Now I'm slowly working to publish my changes to forked repos.

First fork: Try/ZenKit@main...mikolajmikolajczyk:ZenKit:ps4-support

I will publish more next days and weeks.

[Try]

Very cool progress!

Small nitpick on ZenKit: Try/ZenKit is a fork, and upstream is: https://github.com/GothicKit/ZenKit

Instead of custom graphics backend I decided to port mesa driver into ps4

If that means that there will be vulkan driver on PS4 - this sounds great, specially for porting :)

[mikolajmikolajczyk]

Yes, I will try to upstream everything in respective repositories in the end. It is just so much code I will be doing that for months 🤕

[mikolajmikolajczyk]

New fork on my side: https://github.com/Try/Tempest/compare/master...mikolajmikolajczyk:Tempest:ps4-support?expand=1

This is not yet ready to become pull request. Just initial code that enables ps4 support.

[mikolajmikolajczyk]

Here is the port! I'm getting 40-50 fps on highest settings. Only keyboard and mouse supported for now.
https://github.com/orbis-ports/OpenGothic/releases/tag/opengothic-ps4-v0.92-r1

[Try]

That's very cool!

40-50 fps on highest settings

Do you happen to know, if game is CPU or GPU bound? Given that it's ancient non-bindless gpu, you probably hitting fallback inside fallback in rendering.

The title searches /data, /mnt/usb0 … /mnt/usb7 and, under each of them, the directory itself and
gothic2, Gothic2, GOTHIC2, GothicII, Gothic II, gothic, OpenGothic.

Maybe nitpick: there was a period when I've been searching all sorts of paths on PC, but it seem to only confuse everyone :)

[mikolajmikolajczyk]

Do you happen to know, if game is CPU or GPU bound? Given that it's ancient non-bindless gpu, you probably hitting fallback inside fallback in rendering.

PS4 GPU is bindless actually :) Game is GPU bound right now. I have to add more probes to check if I can optimize more but I also am trying multiple things on my mesa driver right now so it will take time :)

Maybe nitpick: there was a period when I've been searching all sorts of paths on PC, but it seem to only confuse everyone :)

You might be right, I wanted to support everyone's use case but it might cause more trouble than its worth.