glIndexMask -- control the writing of individual bits in the color
void glIndexMask(GLuint mask)
Specifies a bit mask to enable and disable the writing of individual
bits in the color index buffers. Initially, the mask is all ones.
glIndexMask 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. Wherever a one
appears in the mask, the corresponding bit in the color index buffer (or
buffers) is made writable. Where a zero appears, the bit is write-protected.
This mask is used only in color index mode, and it affects only the buffers
currently selected for writing (see
glBegin and the
corresponding call to glEnd.
glGet with argument
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© 1995 Uwe Behrens. All rights reserved.