glIndexMask man page on RedHat
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GLINDEXMASK(3G) OpenGL Manual GLINDEXMASK(3G)
NAME
glIndexMask - control the writing of individual bits in the color index
buffers
C SPECIFICATION
void glIndexMask(GLuint mask);
PARAMETERS
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 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.
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
glColorMask(), glDepthMask(), glDrawBuffer(), glIndex(),
glIndexPointer(), glStencilMask()
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/.
AUTHORS
opengl.org
opengl.org 03/16/2013 GLINDEXMASK(3G)
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