WebGLRenderingContext.stencilMaskSeparate()

The WebGLRenderingContext.stencilMaskSeparate() method of the WebGL API controls enabling and disabling of front and/or back writing of individual bits in the stencil planes.

The WebGLRenderingContext.stencilMask() method can set both, the front and back stencil writemasks to one value at the same time.

Syntax

void gl.stencilMaskSeparate(face, mask);

Parameters

face
A GLenum specifying whether the front and/or back stencil writemask is updated. The possible values are:
  • gl.FRONT
  • gl.BACK
  • gl.FRONT_AND_BACK
mask
A GLuint specifying a bit mask to enable or disable writing of individual bits in the stencil planes. By default, the mask is all 1.

Return value

None.

Examples

gl.stencilMaskSeparate(gl.FRONT, 110101);

To get the current stencil masks, query the STENCIL_WRITEMASK, STENCIL_BACK_WRITEMASK, or STENCIL_BITS constants.

gl.getParameter(gl.STENCIL_WRITEMASK);
// 110101
gl.getParameter(gl.STENCIL_BACK_WRITEMASK);
// 110101
gl.getParameter(gl.STENCIL_BITS);
// 0

Specifications

Specification Status Comment
WebGL 1.0
The definition of 'stencilMaskSeparate' in that specification.
Recommendation Initial definition.
OpenGL ES 2.0
The definition of 'glStencilMaskSeparate' in that specification.
Standard Man page of the OpenGL API.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic supportChrome Full support 9Edge Full support 12Firefox Full support 4IE Full support 11Opera Full support 12Safari Full support 5.1WebView Android Full support YesChrome Android Full support 25Edge Mobile Full support YesFirefox Android Full support YesOpera Android Full support 12Safari iOS Full support 8.1Samsung Internet Android Full support Yes

Legend

Full support  
Full support

See also

Document Tags and Contributors

Contributors to this page: fscholz, teoli
Last updated by: fscholz,