The WebGLShaderPrecisionFormat interface is part of the WebGL API and represents the information returned by calling the WebGLRenderingContext.getShaderPrecisionFormat() method.
Properties
WebGLShaderPrecisionFormat.rangeMin- The base 2 log of the absolute value of the minimum value that can be represented.
WebGLShaderPrecisionFormat.rangeMax- The base 2 log of the absolute value of the maximum value that can be represented.
WebGLShaderPrecisionFormat.precision- 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.
var canvas = document.getElementById('canvas');
var gl = canvas.getContext('webgl');
gl.getShaderPrecisionFormat(gl.VERTEX_SHADER, gl.MEDIUM_FLOAT);
// WebGLShaderPrecisionFormat { rangeMin: 127, rangeMax: 127, precision: 23 }
Specifications
| Specification | Status | Comment |
|---|---|---|
| WebGL 1.0 The definition of 'WebGLShaderPrecisionFormat' in that specification. |
Recommendation | Initial definition. |
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.
| Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | 9 | 12 | 4 | 11 | 12 | 5.1 |
| Available in workers | No | No | 441 | No | No | No |
rangeMin | 9 | 12 | 4 | 11 | 12 | 5.1 |
rangeMax | 9 | 12 | 4 | 11 | 12 | 5.1 |
precision | 9 | 12 | 4 | 11 | 12 | 5.1 |
| Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | Opera Android | iOS Safari | Samsung Internet |
|---|---|---|---|---|---|---|---|
| Basic support | Yes | 25 | Yes | Yes | 12 | 8.1 | ? |
| Available in workers | No | No | No | No | No | No | ? |
rangeMin | Yes | 25 | Yes | Yes | 12 | 8.1 | ? |
rangeMax | Yes | 25 | Yes | Yes | 12 | 8.1 | ? |
precision | Yes | 25 | Yes | Yes | 12 | 8.1 | ? |
1. From version 44: this feature is behind the gfx.offscreencanvas.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.