GLINDEXMASK(3G) UNIX Programmer's Manual GLINDEXMASK(3G)
glIndexMask - control the writing of individual bits in the
color index buffers
void glIndexMask( GLuint mask )
mask Specifies a bit mask to enable and disable the writing
of individual bits in the color index buffers. Ini-
tially, the mask is all 1's.
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.
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.
GL_INVALID_OPERATION is generated if glIndexMask is executed
between the execution of glBegin and the corresponding exe-
cution of glEnd.
glGet with argument GL_INDEX_WRITEMASK
glColorMask(3G), glDepthMask(3G), glDrawBuffer(3G),
glIndex(3G), glIndexPointer(3G), glStencilMask(3G)
MirOS BSD #10-current Printed 20.2.2012 1
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