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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
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.