in int gl_SampleMaskIn ;.SH "DESCRIPTION"
gl_SampleMaskIn is a fragment language that indicates the set of samples covered by the primitive generating the fragment during multisample rasterization. It has a sample bit set if and only if the sample is considered covered for this fragment shader invocation. Bit B of mask gl_SampleMask[M] corresponds to sample 32 * M + B. The array has ceil(s / 32) elements where s is the maximum number of color samples supported by the implementation.
|OpenGL Shading Language Version|
gl_SampleMask(), gl_SampleID(), gl_SamplePosition(), gl_FragCoord()
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Copyright © 2011-2014 Khronos Group