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

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

See also

• WebGLRenderingContext.getShaderPrecisionFormat()