Bug 49002 - EGL/GBM: Make it possible to share buffers from compositor to clients
Summary: EGL/GBM: Make it possible to share buffers from compositor to clients
Status: RESOLVED WONTFIX
Alias: None
Product: Wayland
Classification: Unclassified
Component: wayland (show other bugs)
Version: unspecified
Hardware: Other All
: medium enhancement
Assignee: Wayland bug list
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: 49003 (view as bug list)
Depends on:
Blocks: 48976
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Reported: 2012-04-20 12:12 UTC by Darxus
Modified: 2018-06-04 06:45 UTC (History)
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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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