glstencilmask.md

title	description	ms.assetid	keywords	topic_type	api_name	api_location	api_type	ms.topic	ms.date
glStencilMask function (Gl.h)	The glStencilMask function controls the writing of individual bits in the stencil planes.	c586f9db-bad5-4f06-a194-a8d979842d0c	glStencilMask function OpenGL	apiref	glStencilMask	opengl32.dll	DllExport	reference	05/31/2018

glStencilMask function

The glStencilMask function controls the writing of individual bits in the stencil planes.

Syntax

void WINAPI glStencilMask(
   GLuint mask
);

Parameters

mask

A bit mask to enable and disable writing of individual bits in the stencil planes. Initially, the mask is all ones.

Return value

This function does not return a value.

Error codes

The following error code can be retrieved by the glGetError function.

Name	Meaning
GL_INVALID_OPERATION	The function was called between a call to glBegin and the corresponding call to glEnd.

Remarks

The glStencilMask function 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. Wherever a one appears in the mask, the corresponding bit in the stencil buffer is made writable. Where a zero appears, the bit is write-protected. Initially, all bits are enabled for writing.

The following functions retrieve information related to glStencilMask:

glGet with argument GL_STENCIL_WRITEMASK

glGet with argument GL_STENCIL_BITS

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Header	Gl.h
Library	Opengl32.lib
DLL	Opengl32.dll

See also

glBegin

glColorMask

glDepthMask

glEnd

glIndexMask

glStencilFunc

glStencilOp