Name
gl.IndexMask -- control the writing of individual bits in the color index buffers
Synopsis
gl.IndexMask(mask)
Function
gl.IndexMask() controls the writing of individual bits in the color index buffers. The least significant n bits of mask, where n 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 (See gl.DrawBuffer for details.). Initially, all bits are enabled for writing.

Please consult an OpenGL reference manual for more information.

Inputs
mask
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.
Errors
#GL_INVALID_OPERATION is generated if gl.IndexMask() is executed between the execution of gl.Begin() and the corresponding execution of gl.End()

Associated gets
gl.Get() with argument #GL_INDEX_WRITEMASK

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