WebGLRenderingContext.colorMask()

The WebGLRenderingContext.colorMask() method of the WebGL API sets which color components to enable or to disable when drawing or rendering to a WebGLFramebuffer.

Syntax

JavaScript
void <var>gl</var>.colorMask(<var>red, green, blue, alpha</var>);

Parameters

red
A GLboolean specifying whether or not the red color component can be written into the frame buffer. Default value: true.
green
A GLboolean specifying whether or not the green color component can be written into the frame buffer. Default value: true.
blue
A GLboolean specifying whether or not the blue color component can be written into the frame buffer. Default value: true.
alpha
A GLboolean specifying whether or not the alpha (transparency) component can be written into the frame buffer. Default value: true.

Return value

None.

Examples

JavaScript
gl.colorMask(true, true, true, false);

To get the current color mask, query the COLOR_WRITEMASK constant which returns an Array.

JavaScript
gl.getParameter(gl.COLOR_WRITEMASK);
// [true, true, true, false]

Specifications

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

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 9 4.0 (2.0) 11 12 5.1
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? 25 (Yes) ? 12 8.1

See also

License

© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/api/webglrenderingcontext/colormask

API Method Reference WebGL WebGLRenderingContext