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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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