[haiku-bugs] Re: [Haiku] #8612: app_server needs to be multi-head aware

  • From: "axeld" <trac@xxxxxxxxxxxx>
  • Date: Tue, 29 May 2012 17:54:01 -0000

#8612: app_server needs to be multi-head aware
   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          |

Comment (by axeld):

 Another option would be to clone the accelerant for each head; this would
 allow to implement it with minimum changes to the interface.

 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.

 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.

Ticket URL: <http://dev.haiku-os.org/ticket/8612#comment:2>
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