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Static Sub IndexMask ( Mask As Integer )
the writing of individual bits in the color index buffers.
Specifies a bit mask to enable and disable the writing of individual bits
in the color index buffers.
Initially, the mask is all 1's.
controls the writing of individual bits in the color index buffers.
The least significant
bits of mask
is the number of bits in a color index buffer,
specify a mask.
Where a 1 (one) appears in the mask,
it's possible to write to the corresponding bit in the color index
buffer (or buffers).
Where a 0 (zero) appears,
the corresponding bit is write-protected.
This mask is used only in color index mode,
and it affects only the buffers currently selected for writing
Initially, all bits are enabled for writing.
Gl.INVALID_OPERATION is generated if Gl.IndexMask
is executed between the execution of Gl.Begin
and the corresponding execution of Gl.End.
with argument Gl.INDEX_WRITEMASK
See original documentation on OpenGL website