WebGLShaderPrecisionFormat

我們的志工尚未將本文翻譯為 正體中文 (繁體) 版本。加入我們,幫忙翻譯!
您也可以閱讀本文的 English (US) 版本。

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

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support912411125.1
Available in workers No No441 No No No
rangeMin912411125.1
rangeMax912411125.1
precision912411125.1
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support Yes25 Yes Yes128.1 Yes
Available in workers No No No No No No No
rangeMin Yes25 Yes Yes128.1 Yes
rangeMax Yes25 Yes Yes128.1 Yes
precision Yes25 Yes Yes128.1 Yes

1. From version 44: this feature is behind the gfx.offscreencanvas.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.

See also

文件標籤與貢獻者

標籤: 
 此頁面的貢獻者: fscholz, nmve, teoli
 最近更新: fscholz,