[PS2] Experimenting with native 720p support - is it possible?

[metchebe]

Hello all.

Having figured out today how to build the PS2 port with the latest SDK, I built native 480p and 720p versions of the executable by changing the following line 112 in gfx_ps2_wapi.c:

#if defined(VERSION_EU)
    vid_mode = &vid_modes[2]; // PAL
#else
    vid_mode = &vid_modes[4]; // 720p
#endif

So the 480p version seems to work OK, but the 720p version has graphical glitches. HOWEVER, the rendering that can be seen between the glitches seems OK (see image), and apparently runs at fullspeed too...

So I wonder if a fix for native 720p rendering is possible, it seems like the hardware could do it... maybe I missed a step?

Regards.

[fgsfdsfgs]

You would probably need to handle interlacing or something. I remember looking into this and not coming up with any solutions. Now I don't really remember much about it.

[metchebe]

OK thanks for the reply. For what it's worth, I can say my 480p build (with vid_modes[1]) works great having tested it for about an hour, so it being noninterlaced is not an issue here.

720p support seems close, maybe someone (fjtrujy?) could comment if this is in fact true or if the fixes are more complex.

[lucaspontoexe]

I remember trying to achieve the same thing. I encountered the same glitches after some minutes of gameplay. Too bad my PS2 broke

[lucaspontoexe]

Alright, my PS2 is now fixed, and I can finally run this in real hardware. I am getting the same problem.

Back in 2021, I tried replacing some gskit calls with their gskit_hires counterparts.
#25 (comment)
The game worked for a few minutes until all textures began disappearing and glitching out

[freshollie]

@lucaspontoexe is your fork what you are referencing here? ps2...lucaspontoexe:sm64-port:ps2

[lucaspontoexe]

@freshollie yes!
I don't have the full knowledge of the inner workings of the PS2 enough to troubleshoot this

(also the file gfx_ps2_wapi.c got significant changes)