kc3-lang/angle/extensions/ANGLE_program_binary_readiness_query.txt

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• Hash : d9943e44
  Author :
  Date : 2024-04-09T23:53:48
  

  Remove Program::syncState
  
  The last bit of responsibility still left in Program::syncState was to
  wait for post-link tasks for the sake of EGLBlobCacheTest tests.  A new
  extension, GL_ANGLE_program_binary_readiness_query is created so that
  the wait can be done in the test itself.
  
  This extension is ultimately useful for applications as well, so they
  can avoid blocking the CPU by calling glGetProgramBinary prematurely.
  
  Bug: angleproject:8297
  Change-Id: Ied6b755cb9b060198f82c7948bfd03441435a578
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5440302
  Auto-Submit: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: mohan maiya <m.maiya@samsung.com>
  Reviewed-by: Charlie Lao <cclao@google.com>
  Commit-Queue: Charlie Lao <cclao@google.com>
  

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• extensions/ANGLE_program_binary_readiness_query.txt

• Name
  
      ANGLE_program_binary_readiness_query
  
  Name Strings
  
      GL_ANGLE_program_binary_readiness_query
  
  Contributors
  
      Shahbaz Youssefi, Google
  
  Contact
  
      Shahbaz Youssefi (syoussefi 'at' google.com)
  
  Notice
  
      Copyright (c) 2024 The Khronos Group Inc. Copyright terms at
          http://www.khronos.org/registry/speccopyright.html
  
  Status
  
      Draft
  
  Version
  
      Version 1, April 9, 2024
  
  Number
  
      OpenGL ES Extension #??
  
  Dependencies
  
      Requires OpenGL ES 2.0
  
      Written against the OpenGL ES 2.0 specification.
  
  Overview
  
      After a program is linked, its binary can be queried by a call to
      GetProgramBinary.  In ANGLE, binary data may not necessarily be readily
      available after link, for example because post-link tasks are filling in
      caches that make the binary more useful.  Calling GetProgramBinary in
      such cases can lead to a CPU wait.
  
      Ideally, applications should query the program binary after having used the
      program with all graphics states it may be used in during the lifetime of
      the application (often, that is after one frame).  In that case, any binary
      that may be generated and cached due to the state combinations is
      associated with program's binary, making the next run of the application
      fully hit the caches.
  
      Nevertheless, this extension provides a query for the application to know
      when ANGLE's best-guess binaries are cached and the program binary is ready
      for retrieval.  As long as this query returns FALSE, the application should
      defer calling GetProgramBinary, or GetProgramiv with PROGRAM_BINARY_LENGTH
      to avoid getting blocked on the CPU.
  
  New Procedures and Functions
  
      None
  
  New Tokens
  
      Accepted by the <pname> parameters of GetProgramiv:
  
      PROGRAM_BINARY_READY_ANGLE            0x96BE
  
  Additions to the OpenGL ES Specification
  
      Append to paragraph 8 of section 6.1.8 "Shader and Program Queries"
      (description of GetProgramiv):
  
      If pname is PROGRAM_BINARY_READY_ANGLE, TRUE is returned if a call to
      GetProgramBinary will not block, and FALSE is returned otherwise.
  
  New State
  
      None
  
  Conformance Tests
  
      TBD
  
  Issues
  
      None
  
  Revision History
  
      Rev.    Date         Author                 Changes
      ----  -------------  ---------              ----------------------------------------
        1   Apr 09, 2024   syoussefi              Initial version
  

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