kc3-lang/angle/extensions/CHROMIUM_sync_query.txt

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• Author : Geoff Lang
  Date : 2016-04-28 13:34:50
  Hash : 2b4ce80c
  Message : Implement GL_CHROMIUM_sync_query for D3D9 and D3D11. BUG=angleproject:1366 Change-Id: Iadde61968f45b969c76578a6dd9116a25d63fb4b Reviewed-on: https://chromium-review.googlesource.com/341230 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Geoff Lang <geofflang@chromium.org>

• extensions/CHROMIUM_sync_query.txt

• Name
  
      CHROMIUM_sync_query
  
  Name Strings
  
      GL_CHROMIUM_sync_query
  
  Version
  
      Last Modifed Date: April 15, 2014
  
  Dependencies
  
      OpenGL ES 2.0 is required.
  
      EXT_occlusion_query_boolean is required.
  
  Overview
  
      This extension provides a query mechanism that allow for synchronization
      between the host CPU and the GPU, which may be accessing the same
      resources (typically memory).
  
      This extension is useful in conjunction with CHROMIUM_map_image to
      determine when it is safe to access a mapped image. Once the result of
      a COMMANDS_COMPLETED_CHROMIUM query is available, all drawing commands
      issued before the query must have finished. This ensures that the memory
      corresponding to the issued commands can be safely modified (assuming no
      other outstanding drawing commands are issued subsequent to the query).
  
  New Procedures and Functions
  
      None.
  
  Errors
  
      None.
  
  New Tokens
  
      Accepted by the <target> parameter of BeginQueryEXT, EndQueryEXT,
      and GetQueryivEXT:
  
          COMMANDS_COMPLETED_CHROMIUM                     0x84F7
  
  New State
  
      None.
  
  Revision History
  
      4/15/2014   Documented the extension