void GLAPIENTRY glStencilMask( GLuint mask )

PARAMETERS
       mask  Specifies a bit mask to enable and disable writing  of  individual
             bits in the stencil planes.  Initially, the mask is all 1's.

DESCRIPTION
       glStencilMask  controls  the  writing  of individual bits in the stencil
       planes.  The least significant n bits of mask, where n is the number  of
       bits  in  the  stencil buffer, specify a mask.  Where a 1 appears in the
       mask, it's possible to write to the corresponding  bit  in  the  stencil
       buffer.   Where  a  0 appears, the corresponding bit is write-protected.
       Initially, all bits are enabled for writing.

ERRORS
       GL_INVALID_OPERATION is generated if glStencilMask is  executed  between
       the execution of glBegin and the corresponding execution of glEnd.

ASSOCIATED GETS
       glGet with argument GL_STENCIL_WRITEMASK
       glGet with argument GL_STENCIL_BITS

SEE ALSO
       glColorMask, glDepthMask, glIndexMask, glStencilFunc, glStencilOp

                                                              GLSTENCILMASK(3G)