gl_SamplePosition — contains the location of the current sample within the current fragment
in vec2 gl_SamplePosition;
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).
Variable | Version 1.10 | Version 1.20 | Version 1.30 | Version 1.40 | Version 1.50 | Version 3.30 | Version 4.00 | Version 4.10 |
---|---|---|---|---|---|---|---|---|
gl_SamplePosition | - | - | - | - | - | - | Y | Y |
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