Signature
Parameters
| Variables | Description |
|---|---|
| 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.
|
Description
glIndexMask
controls the writing of individual bits in the color index buffers.
The least significant
bits of
mask
,
where
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.
Errors
GL_INVALID_OPERATION
is generated if
glIndexMask
is executed between the execution of
glBegin
and the corresponding execution of
glEnd
.
Associated Gets
glGet
with argument
GL_INDEX_WRITEMASK
See Also
Copyright
Copyright
1991-2006
Silicon Graphics, Inc. This document is licensed under the SGI
Free Software B License. For details, see
http://oss.sgi.com/projects/FreeB/
.
