HP Workstation zx2000 OpenGL 1.1 Reference for HP-UX 11.x - Page 405

S glStencilMask glStencilMask glStencilMask: control the writing of individual bits in the stencil planes. C Specification void 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 1s. 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 Chapter 17 405