GL_SAMPLEPOSITION - Online Linux Manual PageSection : 3G
Updated : 01/20/2022
Source : [FIXME: source]
Note : [FIXME: manual]
NAMEgl_SamplePosition − contains the location of the current sample within the current fragment
DECLARATIONin 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 none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'> 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 ALSOgl_SampleID(), gl_SampleMask(), gl_FragCoord()
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