WebGLShaderPrecisionFormat

Baseline Widely available *

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

* Some parts of this feature may have varying levels of support.

WebGLShaderPrecisionFormat 接口是WebGL API 的一部分,它表示通过调用WebGLRenderingContext.getShaderPrecisionFormat()返回信息的信息。

属性

WebGLShaderPrecisionFormat.rangeMin

以 2 为底的最小值的绝对值的对数。

WebGLShaderPrecisionFormat.rangeMax

可以表示的最大值的绝对值的底数为 2 的对数。

WebGLShaderPrecisionFormat.precision

可以表示的精度位的数目。对于整数类型,这个值总是 0。

示例

WebGLShaderPrecisionFormat 对象通过WebGLRenderingContext.getShaderPrecisionFormat() 方法来返回。

js
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 }

规格

Specification
WebGL Specification
# 5.12

浏览器兼容性

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
WebGLShaderPrecisionFormat
precision
rangeMax
rangeMin
Available in workers
Experimental

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
No support
No support
Experimental. Expect behavior to change in the future.

参见