NAME¶
gl_SampleID - contains the index of the sample currently being processed
DECLARATION¶
in int gl_SampleID ;.SH "DESCRIPTION"
gl_SampleID is a fragment language input variable that
contains the index of the sample currently being processed. This variable is
in the range 0 to gl_NumSamples() - 1, where gl_NumSamples()
is the total number of samples in each fragment for the current framebuffer
(and thus 1 if rendering to a non-multisample buffer). Any static use of
this variable in a fragment shader causes the entire shader to be evaluated
per-sample rather than per-fragment.
When rendering to a non-multisample buffer, or if multisample
rasterization is disabled, gl_SampleID will always be zero.
gl_NumSamples() is the sample count of the framebuffer regardless of
whether multisample rasterization is enabled or not.
VERSION SUPPORT¶
|
OpenGL Shading Language
Version |
| Variable 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_SampleID |
- |
- |
- |
- |
- |
- |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
SEE ALSO¶
gl_SamplePosition(), gl_NumSamples()
COPYRIGHT¶
Copyright © 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 © 2011-2014 Khronos Group
