Web/API/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 1.0The definition of 'stencilMaskSeparate' in that specification.	Recommendation	Initial definition.
OpenGL ES 2.0The definition of 'glStencilMaskSeparate' in that specification.	Standard	Man page of the OpenGL API.

Browser compatibility

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`stencilMaskSeparate`	Chrome Full support 9	Edge Full support 12	Firefox Full support 4	IE Full support 11	Opera Full support 12	Safari Full support 5.1	WebView Android Full support Yes	Chrome Android Full support 25	Firefox Android Full support Yes	Opera Android Full support 12	Safari iOS Full support 8	Samsung Internet Android Full support 1.5

Legend

Full support: Full support