kc3-lang/angle/extensions/EGL_ANGLE_platform_angle_context_virtualization.txt

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  Commit

• Author : Geoff Lang
  Date : 2018-06-11 14:56:34
  Hash : 24ddc7a8
  Message : WGL: Support unvirtualized contexts and unsafe multithreading. When using unvirtualized contexts, DisplayWGL still creates a Renderer for managing any internal GL resources such as emulated back buffers for DXGISwapChainWindowSurfaceWGL or D3DTextureSurfaceWGL but also creates a new Renderer for each GL context. All created contexts share resources. BUG=angleproject:2464 Change-Id: I945502514079368e062beef70bed49c61ed44403 Reviewed-on: https://chromium-review.googlesource.com/1097459 Commit-Queue: Geoff Lang <geofflang@chromium.org> Reviewed-by: Yuly Novikov <ynovikov@chromium.org>

• extensions/EGL_ANGLE_platform_angle_context_virtualization.txt

• Name
  
      ANGLE_platform_angle_context_virtualization
  
  Name Strings
  
      EGL_ANGLE_platform_angle_context_virtualization
  
  Contributors
  
      Geoff Lang, Google
  
  Contacts
  
      Geoff Lang, Google (geofflang 'at' chromium 'dot' org)
  
  Status
  
      Draft
  
  Version
  
      Version 1, 2018-06-11
  
  Number
  
      EGL Extension XXX
  
  Extension Type
  
      EGL client extension
  
  Dependencies
  
      Requires ANGLE_platform_angle.
  
  Overview
  
      This extension allows the client to request a Display that internally
      virtualizes contexts. Requesting virtualized contexts may impact
      performance or ability to render from multiple threads simultaneously.
  
  New Types
  
      None
  
  New Procedures and Functions
  
      None
  
  New Tokens
  
      Accepted as an attribute name in the <attrib_list> argument of
      eglGetPlatformDisplayEXT:
  
          EGL_PLATFORM_ANGLE_CONTEXT_VIRTUALIZATION_ANGLE    0x3481
  
  Additions to the EGL Specification
  
      None.
  
  New Behavior
  
      To request a display that internally utilizes context virtualization,
      use the attribute EGL_PLATFORM_ANGLE_CONTEXT_VIRTUALIZATION_ANGLE.
      EGL_TRUE enables context virtualization and EGL false disables it.
      If it is set to EGL_DONT_CARE, the default setting depends on the
      implementation. Any value other than these will result in an error.
      The default value for EGL_PLATFORM_ANGLE_CONTEXT_VIRTUALIZATION_ANGLE
      is EGL_DONT_CARE. Display creation may fail if hardware limitations
      prohibit the requested setting.
  
  Issues
  
      None
  
  Revision History
  
      Version 1, 2018-06-11 (Geoff Lang)
        - Initial draft