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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 | Firefox | Edge | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic Support | 9 | 4.0 | 12 | 11 | 12 | 5.1 |
| Available in workers | (No) | 44.01 | (No) | (No) | (No) | (No) |
| Feature | Android | Chrome for Android | Edge mobile | Firefox for Android | IE mobile | Opera Android | iOS Safari |
|---|---|---|---|---|---|---|---|
| Basic Support | (Yes) | 25 | (Yes) | (Yes) | 11 | 12 | 8.1 |
| Available in workers | (No) | (No) | (No) | (No) | (No) | (No) | (No) |
1. From version 44.0, this feature is behind the gfx.offscreencanvas.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.