glIndexMask(3G)glIndexMask(3G)NAMEglIndexMask - control the writing of individual bits in the color index
buffers
SYNOPSIS
void glIndexMask(
GLuint mask );
PARAMETERS
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.
DESCRIPTIONglIndexMask() 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 cor‐
responding bit is write-protected.
This mask is used only in color index mode, and it affects only the
buffers currently selected for writing (see glDrawBuffer()). Ini‐
tially, all bits are enabled for writing.
ERRORS
GL_INVALID_OPERATION is generated if glIndexMask() is executed between
the execution of glBegin() and the corresponding execution of glEnd().
ASSOCIATED GETSglGet() with argument GL_INDEX_WRITEMASK
SEE ALSOglColorMask(3), glDepthMask(3), glDrawBuffer(3), glIndex(3), glIndex‐
Pointer(3), glStencilMask(3)glIndexMask(3G)