glStencilMask

glStencilMask controls the writing of individual bits in the stencil planes. The least significant $\mathit{n}$ bits of mask , where $\mathit{n}$ 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.

There can be two separate mask writemasks; one affects back-facing polygons, and the other affects front-facing polygons as well as other non-polygon primitives. glStencilMask sets both front and back stencil writemasks to the same values. Use glStencilMaskSeparate to set front and back stencil writemasks to different values.

glStencilMask is the same as calling glStencilMaskSeparate with face set to GL_FRONT_AND_BACK .

glGet with argument GL_STENCIL_WRITEMASK , GL_STENCIL_BACK_WRITEMASK , or GL_STENCIL_BITS

glColorMask , glDepthMask , glStencilFunc , glStencilFuncSeparate , glStencilMaskSeparate , glStencilOp , glStencilOpSeparate

Copyright 1991-2006 Silicon Graphics, Inc. Copyright 2010-2014 Khronos Group. This document is licensed under the SGI Free Software B License. For details, see .