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 © 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