[haiku-bugs] Re: [Haiku] #8612: app_server needs to be multi-head aware
- From: "kallisti5" <trac@xxxxxxxxxxxx>
- Date: Tue, 29 May 2012 18:04:35 -0000
#8612: app_server needs to be multi-head aware
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Reporter: kallisti5 | Owner: axeld
Type: | Status: new
enhancement | Milestone: Unscheduled
Priority: low | Version: R1/Development
Component: | Keywords: multiple display, multiple crtc,
Servers/app_server | multihead, multi-head
Resolution: | Blocking:
Blocked By: | Platform: All
Has a Patch: 0 |
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Comment (by kallisti5):
Replying to [comment:2 axeld]:
> Another option would be to clone the accelerant for each head; this
would allow to implement it with minimum changes to the interface.
I'm not 100% sold on this idea... probing displays is difficult
(especially on newer cards where we have to walk down DisplayPort paths)
Hot plugging monitors sounds like *big* pain here.
> Also, there is no need to actually break compatibility: just create a
new API together with a new HWInterface implementation, and let the
app_server support both.
This is a really good idea... i'd rather not *completely* trash the old
BeOS accelerant layout as it is working. (even though we aren't abi
compatible with BeOS drivers)
> The accelerant interface needs a redesign anyway, if you want to prepare
it for drivers capable of supporting compositing. Ie. the app_server needs
to maintain the memory for the graphics card in order to allocate blocks
for textures as needed. The remaining acceleration functions need to be
able to work on blocks of memory rather than one screen, etc. Even support
for 32 bit hardware mouse cursors would be nice to have for a start :-)
>
> There is little reason to try to squeeze it all into the existing
accelerant API which isn't really adequate anymore.
All really good points. I forgot about compositing... it should be rolled
into this as multi-head changes would be a great time to lay the basework
for compositing.
--
Ticket URL: <http://dev.haiku-os.org/ticket/8612#comment:3>
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