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 Edge Firefox Internet Explorer Opera Safari Servo
Basic Support91211.011125.1No support
Available in workersNo supportNo supportNo support1No supportNo supportNo supportNo support
Feature Android Chrome for Android Edge Mobile Firefox for Android IE Mobile Opera Mobile Safari Mobile
Basic Support(Yes)25No support(Yes)11128.1
Available in workersNo supportNo supportNo supportNo supportNo supportNo supportNo support

1. This feature is experimentally implemented since Firefox 44; to activate it, in about:config, set gfx.offscreencanvas.enabled to true

See also

Document Tags and Contributors

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