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WebGLShaderPrecisionFormat

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

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 9 11.0 (11.0) 11 12 5.1
Available in workers Not supported 44 (44) [1] Not supported Not supported Not supported
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? 25 (Yes) ? 12 8.1
Available in workers Not supported Not supported 44.0 (44) [1] Not supported Not supported Not supported

[1] This feature is behind a feature preference setting. In about:config, set gfx.offscreencanvas.enabled to true.

See also

Document Tags and Contributors

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 Contributors to this page: fscholz
 Last updated by: fscholz,