bionic (3) glTextureBarrier.3G.gz

Provided by: opengl-4-man-doc_1.0~svn33624-1_all bug

NAME
       glTextureBarrier - controls the ordering of reads and writes to rendered fragments across drawing
       commands


C SPECIFICATION
       void glTextureBarrier(void);


DESCRIPTION
       The values of rendered fragments are undefined when a shader stage fetches texels and the same texels are
       written via fragment shader outputs, even if the reads and writes are not in the same drawing command. To
       safely read the result of a written texel via a texel fetch in a subsequent drawing command, call
       glTextureBarrier between the two drawing commands to guarantee that writes have completed and caches have
       been invalidated before subsequent drawing commands are executed.


NOTES
       The situation described above is referred to as a rendering feedback loop and is discussed in more detail
       in section 9.3 of the OpenGL 4.5 Specification.


ERRORS
       None.


VERSION SUPPORT
       ┌─────────────────┬───────────────────────────────────────────────────────────────────────┐
       │                 │                OpenGL Version                                         │
       ├─────────────────┼─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┤
       │Function         │ 2.0 │ 2.1 │ 3.0 │ 3.1 │ 3.2 │ 3.3 │ 4.0 │ 4.1 │ 4.2 │ 4.3 │ 4.4 │ 4.5 │
       │/                │     │     │     │     │     │     │     │     │     │     │     │     │
       │Feature          │     │     │     │     │     │     │     │     │     │     │     │     │
       │Name             │     │     │     │     │     │     │     │     │     │     │     │     │
       ├─────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
       │glTextureBarrier │  -  │  -  │  -  │  -  │  -  │  -  │  -  │  -  │  -  │  -  │  -  │  ✔  │
       └─────────────────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘


SEE ALSO
       glMemoryBarrier()


       Copyright © 2014 Khronos Group. This material may be distributed subject to the terms and conditions set
       forth in the Open Publication License, v 1.0, 8 June 1999.  http://opencontent.org/openpub/.


       Copyright © 2014 Khronos Group

[FIXME: source]                                    01/03/2018                               GLTEXTUREBARRIER(3G)