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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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