kc3-lang/angle/extensions/EGL_ANGLE_context_virtualization.txt

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• Hash : d2c01d2c
  Author :
  Date : 2021-09-17T12:57:14
  

  GL: Allow selecting virtualization groups at context creation
  
  Rewrite EGL_ANGLE_platform_angle_context_virtualization to
  EGL_ANGLE_context_virtualization, changing the context virtualization
  parameter to an identifier for what virtualization group the frontend
  context should be added to.
  
  This allows ANGLE's GL backend to be used by multiple threads if the
  user creates contexts with different virtualization groups.
  
  Bug: angleproject:6406
  Change-Id: I7414d4705ce10bdf63a9b824043d5dd040dad875
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3169193
  Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Commit-Queue: Geoff Lang <geofflang@chromium.org>
  

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• extensions/EGL_ANGLE_context_virtualization.txt

• Name
  
      ANGLE_context_virtualization
  
  Name Strings
  
      EGL_ANGLE_context_virtualization
  
  Contributors
  
      Geoff Lang, Google
  
  Contacts
  
      Geoff Lang, Google (geofflang 'at' chromium 'dot' org)
  
  Status
  
      Draft
  
  Version
  
      Version 2, 2021-09-17
  
  Number
  
      EGL Extension XXX
  
  Extension Type
  
      EGL display extension
  
  Dependencies
  
      None
  
  Overview
  
      This extension allows the client to create contexts that are internally
      virtualized on a single native context for performance or stability.
  
  New Types
  
      None
  
  New Procedures and Functions
  
      None
  
  New Tokens
  
      Accepted as an attribute name in the <attrib_list> argument of
      eglCreateContext:
  
          EGL_CONTEXT_VIRTUALIZATION_GROUP_ANGLE    0x3481
  
  Additions to the EGL Specification
  
      None.
  
  New Behavior
  
      To request that a context should be part of a virtualization group,
      use the attribute EGL_CONTEXT_VIRTUALIZATION_GROUP_ANGLE. EGL_DONT_CARE
      can be used to allow the implementation to decide what virtualization
      group is used. The default value of EGL_CONTEXT_VIRTUALIZATION_GROUP_ANGLE
      is EGL_DONT_CARE. It is undefined behaviour to have multiple contexts from
      the same virtualization group current different threads simultaneously.
  
  Issues
  
      None
  
  Revision History
  
      Version 1, 2018-06-11 (Geoff Lang)
        - Initial draft
      Version 2, 2021-09-17 (Geoff Lang)
        - Change to context creation attribute
  

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