Add fps rate limiter

[rickgaiser]

@freshollie can you try this?

Untested but should work. @fjtrujy what do you think? Can be added for non-HIRES as well.

[freshollie]

I'll have a go this weekend :)

I'll also use this time to determine if changing the line order for 1080i helps my TV 🤔

[freshollie]

Yep works great, having this in would be really nice!

static void gfx_ps2_swap_buffers_end(void) {
    /* How SM64 expect to run at 30 PFS we need to wait for 2 vsync */
    if (use_hires) {
        gsKit_hires_flip_ext(gs_global, GSFLIP_RATE_LIMIT_2);
    } else {
        gsKit_sync(gs_global);
        gsKit_flip(gs_global);
    }

    gsKit_queue_exec(gs_global);
    gsKit_TexManager_nextFrame(gs_global);
}

I used it like this which I think is correct?

No FPS issues in levels now I have this on

[rickgaiser]

You need to use gsKit_queue_exec(gs_global); for non-hires ONLY. With HIRES the queue is executed by the HIRES thread 120x per second for 2 passes what you're using now.

What you're doing causes 1 redundant 'pass', so removing it will make the game run a little smoother.

[freshollie]

Done. Though it did run fine without it

[freshollie]

@rickgaiser I think also adding for SD will be a good idea, but otherwise good to merge IMO

[rickgaiser]

Yes, I've already implemented that partially. Will try to finish when I have time.