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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 (C) 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				    06/10/2014				  GLINDEXMASK(3G)
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