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

NAME
       gl_SamplePosition - contains the location of the current sample within
       the current fragment

DECLARATION
       in vec2 gl_SamplePosition ;.SH "DESCRIPTION"

       gl_SamplePosition is a fragment language input variable that contains
       the location within a fragment of the sample currently being processed.
       The x and y components of gl_SamplePosition contain the sub-pixel
       coordinate of the current sample and will have values in the range 0.0
       to 1.0. The sub-pixel coordinates of the center of the pixel are always
       (0.5, 0.5). Any static use of gl_SamplePosition causes the entire
       fragment shader to be evaluated per-sample rather than per-fragment.
       When rendering to a non-multisample buffer, or if multisample
       rasterization is disabled, gl_SamplePosition will be (0.5, 0.5).

VERSION SUPPORT

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

SEE ALSO
       gl_SampleID(), gl_SampleMask(), 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_SAMPLEPOSITION(3G)