glSampleMaski — set the value of a sub-word of the sample mask
Specifies which 32-bit sub-word of the sample mask to update.
Specifies the new value of the mask sub-word.
glSampleMaski sets one 32-bit sub-word of the multi-word sample mask,
maskIndex specifies which 32-bit sub-word of the sample mask to update, and
the new value to use for that sub-word.
maskIndex must be less than the value of
GL_MAX_SAMPLE_MASK_WORDS. Bit B of mask word M corresponds to sample
32 x M + B.
glSampleMaski is available only if the GL version is 3.2 or greater, or if the
extension is supported.
GL_INVALID_VALUE is generated if
maskIndex is greater than or equal to the value
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