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