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GLINDEXMASK(3G)                                                                              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  signifi-cant significant
       cant  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(3G), glDepthMask(3G), glDrawBuffer(3G), glIndex(3G), glIndexPointer(3G), glStencilMask(3G)




                                                                                             GLINDEXMASK(3G)