Bug 49002

Summary:	EGL/GBM: Make it possible to share buffers from compositor to clients
Product:	Wayland	Reporter:	Darxus <darxus>
Component:	wayland	Assignee:	Wayland bug list <wayland-bugs>
Status:	RESOLVED WONTFIX	QA Contact:
Severity:	enhancement
Priority:	medium
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:
Bug Depends on:
Bug Blocks:	48976

Description Darxus 2012-04-20 12:12:44 UTC

Tricky part here is how to indicate to EGL on the server side that it should make an EGLImage available to a client.  We'll need a "create a wl_buffer for this EGLImage for this client" kind of entry point.

Comment 1 Daniel Stone 2014-10-03 17:19:30 UTC

*** Bug 49003 has been marked as a duplicate of this bug. ***

Comment 2 Daniel Stone 2014-10-03 17:20:22 UTC

EGL implementations can already send a wl_surface along to the server, but then we need a way to indicate to gbm that a particular surface is (or isn't) a scanout candidate. gbm can then arbitrate buffer allocations itself. This is quite complex, but with this simple API addition, all hidden inside the implementation:
  gbm_surface_set_scanout_candidate(struct gbm_surface *surface, bool scanout)

Comment 3 Daniel Stone 2018-06-04 06:45:50 UTC

We don't plan to generically duplicate this X11 functionality, though some compositors have been looking at doing it.

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