CentOS 7.0 - man page for glindexmask (centos section 3G)
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GLINDEXMASK(3G) OpenGL Manual GLINDEXMASK(3G)
glIndexMask - control the writing of individual bits in the color index buffers
void glIndexMask(GLuint 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.
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 execution of glEnd().
glGet() with argument GL_INDEX_WRITEMASK
glColorMask(), glDepthMask(), glDrawBuffer(), glIndex(), glIndexPointer(), glStencilMask()
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/.
opengl.org 06/10/2014 GLINDEXMASK(3G)
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