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authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
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+---
+title: WebGLShaderPrecisionFormat
+slug: Web/API/WebGLShaderPrecisionFormat
+translation_of: Web/API/WebGLShaderPrecisionFormat
+---
+<div><strong>WebGLShaderPrecisionFormat</strong> 接口是<a href="/en-US/docs/Web/API/WebGL_API">WebGL API</a> 的一部分,它表示通过调用{{domxref("WebGLRenderingContext.getShaderPrecisionFormat()")}}返回信息的信息。</div>
+
+<h2 id="属性">属性</h2>
+
+<dl>
+ <dt>{{domxref("WebGLShaderPrecisionFormat.rangeMin")}}</dt>
+ <dd>以2为底的最小值的绝对值的对数。</dd>
+ <dt>{{domxref("WebGLShaderPrecisionFormat.rangeMax")}}</dt>
+ <dd>可以表示的最大值的绝对值的底数为2的对数。</dd>
+ <dt>{{domxref("WebGLShaderPrecisionFormat.precision")}}</dt>
+ <dd>可以表示的精度位的数目。对于整数类型,这个值总是0。</dd>
+</dl>
+
+<h2 id="示例">示例</h2>
+
+<p><code>WebGLShaderPrecisionFormat</code> 对象通过{{domxref("WebGLRenderingContext.getShaderPrecisionFormat()")}} 方法来返回。</p>
+
+<pre class="brush: 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 }
+</pre>
+
+<h2 id="规格">规格</h2>
+
+<table class="standard-table">
+ <tbody>
+ <tr>
+ <th scope="col">规格</th>
+ <th scope="col">状态</th>
+ <th scope="col">注释</th>
+ </tr>
+ <tr>
+ <td>{{SpecName('WebGL', "#5.12", "WebGLShaderPrecisionFormat")}}</td>
+ <td>{{Spec2('WebGL')}}</td>
+ <td>Initial definition.</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<p class="hidden">The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> and send us a pull request.</p>
+
+<p>{{Compat("api.WebGLShaderPrecisionFormat")}}</p>
+
+<h2 id="另请参阅">另请参阅</h2>
+
+<ul>
+ <li>{{domxref("WebGLRenderingContext.getShaderPrecisionFormat()")}}</li>
+</ul>