Import libliftoff as subproject and plumb our planes through it.
Wait for a flip to complete immediately after queuing it for now.
Also immediately wait for cursor image uploads, as we don't have to
do Vulkan rendering anymore after queuing an upload.
Cursor shows up with format hack, but is badly corrupt. We might need
to use a DRM dumb_fb rather than going through the same Vulkan image.
Alpha bits of surfaces are ignored again, need to make Steam select
an ARGB visual for overlay windows, probably.
Setting up the "alpha" plane property somehow makes overlays not
show up at all despite liftoff happily letting us go with scanout.
In order to launch the binary with for example Mesa being installed not into
the regular /usr prefix but into something like /opt the binary needs to be
launched from the install directory and not only directly from the build
directory.
So actually do install the executable.
That should help setting it up on a machine that might want to use normal
wlroots for other things. Resolve a GL symbol conflict now that we're
colocated with wlroots' dynamic loading code.
Get steamcompmgr's GL context from EGL and rip out GLX, as we need EGL to
import dma-bufs.
When new buffers are committed to surfaces, push their information to
steamcompmgr (without any feedback for now, fire-and-forget).
Can render games now.
Enable C++ for bits of the code, but nothing that includes wlroots as that
doesn't want to build as C++.
Enable SubstructureRedirectMask mode and handle MapRequest for now; this lets
us get the WL_SURFACE_ID ClientMessages.
This uses a build of wlroots that has its internal XWM ripped out.
