> Again. This is a thing the xorg devs have already looked at. Their conclusion? "Nope. Too much work. Just use Wayland."

My comment isn't about how much work something would need, but about how it can be done.

> Once again, every... last... one of the Xorg devs is of the opinion that you should be using Wayland instead.

Good for them, but i have my own opinions.

> Even if you had changes to propose to Xorg, they will not make it into a release.

Maybe or maybe not. AFAICT the official stance has been that nobody wanted to work on these things, not that they are against it, they just do not want to do it themselves.

But if they do not make it into a release, there is also the XLibre fork or there might be other forks in the future, it isn't like Xorg is some sort of proprietary product. I'd rather stick with Xorg as it seems more professional but ultimately whatever works.

> see if you can add a protocol to the compositor to allow "overlay" of an HDR image displayed using Wayland "on top of" an X window that wants to do HDR.

TBH this sounds like an incredibly ugly and fragile hack. There are two main uses for HDR support: embedded HDR (e.g. in a firefox window) and fullscreen HDR (e.g. for videos/games). For the latter there is no point in an overlay, just give the server the full screen. For the former such an overlay will require awful workarounds when you want more than just a self-contained rectangle, e.g. you want it clipped (partially visible image) or need it to be mixed with the underlying contents (think of a non-square HDR shape that blends into SDR text beneath or wrapped around it).

From a pragmatic perspective the best approach would be to see how toolkits, etc, use HDR support in Wayland and implement something similar under X11/Xorg to make supporting both of them easy.

> But really, consider switching to Wayland.

I've been using Window Maker for decades and have no interest in something else. Honestly i think that adding Wayland support to Window Maker or making a Window Maker-like Wayland compositor are both more of an effort and harder than adding HDR support to Xorg. Also i am sometimes trying KDE Plasma Wayland for various things and i have several programs having small but annoying issues under Wayland.

That said, from a practical perspective, one can use both. The only use for HDR i can think of right now is games and videos and i can keep using my Xorg-based setup for everything while switching to another virtual terminal running KDE Plasma Wayland for games/videos that i want to see in HDR. Pressing Ctrl+Alt+Fn to switch virtual terminal isn't any different than pressing Win+n to switch virtual desktop.