WebGLRenderingContext: sampleCoverage() method
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Note: This feature is available in Web Workers.
The WebGLRenderingContext.sampleCoverage()
method of the
WebGL API specifies multi-sample coverage
parameters for anti-aliasing effects.
Syntax
js
sampleCoverage(value, invert)
Parameters
Return value
None (undefined
).
Examples
Multi-sampling is disabled by default. To enable or disable multi-sampling, use the
enable()
and
disable()
methods with the argument
gl.SAMPLE_COVERAGE
and gl.SAMPLE_ALPHA_TO_COVERAGE
.
js
gl.enable(gl.SAMPLE_COVERAGE);
gl.sampleCoverage(0.5, false);
To check the sample coverage values, query the SAMPLE_COVERAGE_VALUE
and
SAMPLE_COVERAGE_INVERT
constants.
js
gl.getParameter(gl.SAMPLE_COVERAGE_VALUE); // 0.5
gl.getParameter(gl.SAMPLE_COVERAGE_INVERT); // false
Specifications
Specification |
---|
WebGL Specification # 5.14.3 |
Browser compatibility
BCD tables only load in the browser
See also
-
HTMLCanvasElement.getContext()
–antialias
parameter for the context.