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

NAME
       gl_FragDepth - establishes a depth value for the current fragment

DECLARATION
       out float gl_FragDepth ;.SH "DESCRIPTION"

       Available only in the fragment language, gl_FragDepth is an output
       variable that is used to establish the depth value for the current
       fragment. If depth buffering is enabled and no shader writes to
       gl_FragDepth, then the fixed function value for depth will be used
       (this value is contained in the z component of gl_FragCoord())
       otherwise, the value written to gl_FragDepth is used. If a shader
       statically assigns to gl_FragDepth, then the value of the fragment's
       depth may be undefined for executions of the shader that take that
       path. That is, if the set of linked fragment shaders statically contain
       a write to gl_FragDepth, then it is responsible for always writing it.

VERSION SUPPORT

       +-------------+-----------------------------------------------------------------------------------+
       |             |                          OpenGL Shading Language Version                          |
       +-------------+------+------+------+------+------+------+------+------+------+------+------+------+
       |Variable     | 1.10 | 1.20 | 1.30 | 1.40 | 1.50 | 3.30 | 4.00 | 4.10 | 4.20 | 4.30 | 4.40 | 4.50 |
       |Name         |      |      |      |      |      |      |      |      |      |      |      |      |
       +-------------+------+------+------+------+------+------+------+------+------+------+------+------+
       |gl_FragDepth | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  |
       +-------------+------+------+------+------+------+------+------+------+------+------+------+------+

SEE ALSO
       gl_FragCoord()

COPYRIGHT
       Copyright (C) 2011-2014 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) 2011-2014 Khronos Group

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