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WebGLRenderingContext.stencilMask

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

The WebGLRenderingContext.stencilMaskSeparate() method can set front and back stencil writemasks to different values.

Syntax

void gl.stencilMask(mask);

Parameters

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.stencilMask(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 'stencilMask' in that specification.	Recommendation	Initial definition.
OpenGL ES 2.0 The definition of 'glStencilMask' in that specification.	Standard	Man page of the OpenGL API.

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	9	12	4	11	12	5.1

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	Yes	25	Yes	Yes	12	8.1	Yes