1GLINDEXMASK(3G)                  OpenGL Manual                 GLINDEXMASK(3G)
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NAME

6       glIndexMask - control the writing of individual bits in the color index
7       buffers
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C SPECIFICATION

10       void glIndexMask(GLuint mask);
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PARAMETERS

13       mask
14           Specifies a bit mask to enable and disable the writing of
15           individual bits in the color index buffers. Initially, the mask is
16           all 1's.
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DESCRIPTION

19       glIndexMask controls the writing of individual bits in the color index
20       buffers. The least significant n bits of mask, where n is the number of
21       bits in a color index buffer, specify a mask. Where a 1 (one) appears
22       in the mask, it's possible to write to the corresponding bit in the
23       color index buffer (or buffers). Where a 0 (zero) appears, the
24       corresponding bit is write-protected.
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26       This mask is used only in color index mode, and it affects only the
27       buffers currently selected for writing (see glDrawBuffer()). Initially,
28       all bits are enabled for writing.
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ERRORS

31       GL_INVALID_OPERATION is generated if glIndexMask is executed between
32       the execution of glBegin() and the corresponding execution of glEnd().
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ASSOCIATED GETS

35       glGet() with argument GL_INDEX_WRITEMASK
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SEE ALSO

38       glColorMask(), glDepthMask(), glDrawBuffer(), glIndex(),
39       glIndexPointer(), glStencilMask()
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42       Copyright © 1991-2006 Silicon Graphics, Inc. This document is licensed
43       under the SGI Free Software B License. For details, see
44       http://oss.sgi.com/projects/FreeB/.
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AUTHORS

47       opengl.org
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51opengl.org                        07/13/2018                   GLINDEXMASK(3G)
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