1GLINDEXMASK(3G)                                                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

11       void glIndexMask( GLuint mask )
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PARAMETERS

15       mask  Specifies a bit mask to enable and disable the writing  of  indi‐
16             vidual  bits  in the color index buffers.  Initially, the mask is
17             all 1's.
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DESCRIPTION

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

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

36       glGet with argument GL_INDEX_WRITEMASK
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SEE ALSO

39       glColorMask(3G),   glDepthMask(3G),   glDrawBuffer(3G),    glIndex(3G),
40       glIndexPointer(3G), glStencilMask(3G)
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44                                                               GLINDEXMASK(3G)