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	-	-	-	-	-	-	✔	✔	✔	✔	✔	✔

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. m[blue]http://opencontent.org/openpub/m[].

COPYRIGHT

Copyright © 2011-2014 Khronos Group