GLTEXTUREBARRIER(3G)            [FIXME: manual]           GLTEXTUREBARRIER(3G)

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
       Copyright (C) 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
       Copyright (C) 2014 Khronos Group

[FIXME: source]                   05/21/2022              GLTEXTUREBARRIER(3G)