glIndexMask: control the writing of individual bits in the color
C Specification |
Associated Gets |
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. 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.
- Specifies a bit mask to enable and disable the writing of individual bits
in the color index buffers. Initially, the mask is all 1s.
This mask is used only in color index mode, and it affects only the buffers
currently selected for writing (see glDrawBuffer). Initially, all bits are
enabled for writing.
glGet with argument
- GL_INVALID_OPERATION is generated if glIndexMask is executed between the
execution of glBegin and the
corresponding execution of glEnd.