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WebGLShaderPrecisionFormat

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.

* Some parts of this feature may have varying levels of support.

Note: This feature is available in Web Workers.

The WebGLShaderPrecisionFormat interface is part of the WebGL API and represents the information returned by calling the WebGLRenderingContext.getShaderPrecisionFormat() method.

Instance properties

WebGLShaderPrecisionFormat.rangeMin Read only

The base 2 log of the absolute value of the minimum value that can be represented.

WebGLShaderPrecisionFormat.rangeMax Read only

The base 2 log of the absolute value of the maximum value that can be represented.

WebGLShaderPrecisionFormat.precision Read only

The number of bits of precision that can be represented. For integer formats this value is always 0.

Examples

A WebGLShaderPrecisionFormat object is returned by the WebGLRenderingContext.getShaderPrecisionFormat() method.

const canvas = document.getElementById("canvas");
const gl = canvas.getContext("webgl");
gl.getShaderPrecisionFormat(gl.VERTEX_SHADER, gl.MEDIUM_FLOAT);
// WebGLShaderPrecisionFormat { rangeMin: 127, rangeMax: 127, precision: 23 }

Specifications

Specification
WebGL Specification>
# 5.12>

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Opera Safari Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet WebView Android WebView on iOS
WebGLShaderPrecisionFormat 9 12 4 12 5.1 25 4 12 8 1.5 4.4 8
precision 9 12 4 12 5.1 25 4 12 8 1.5 4.4 8
rangeMax 9 12 4 12 5.1 25 4 12 8 1.5 4.4 8
rangeMin 9 12 4 12 5.1 25 4 12 8 1.5 4.4 8
worker_support No No 105 No No No 105 No No No No No

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/WebGLShaderPrecisionFormat