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---
title: WebGLRenderingContext.isProgram()
slug: Web/API/WebGLRenderingContext/isProgram
translation_of: Web/API/WebGLRenderingContext/isProgram
---
<p>{{APIRef("WebGL")}}</p>

<p> <a href="/en-US/docs/Web/API/WebGL_API">WebGL API</a>中的<strong><code>WebGLRenderingContext.isProgram()</code></strong> 函数 将会在{{domxref("WebGLProgram")}}是一个合法的着色器程序(program)时返回 <code>true</code> , 而在其他情况返回<code>false</code></p>

<h2 id="语法">语法</h2>

<pre class="syntaxbox">GLboolean <var>gl</var>.isProgram(<var>program</var>);
</pre>

<h3 id="参数">参数</h3>

<dl>
 <dt>program</dt>
 <dd>一个要检查的 {{domxref("WebGLProgram")}}对象 .</dd>
</dl>

<h3 id="返回值">返回值</h3>

<p>一个表示program是否有效的 {{domxref("GLboolean")}} 值.</p>

<h2 id="示例">示例</h2>

<h3 id="检查一个program是否有效">检查一个program是否有效</h3>

<pre class="brush: js">var canvas = document.getElementById('canvas');
var gl = canvas.getContext('webgl');
var program = gl.createProgram();

// ...

gl.isProgram(program);
</pre>

<h2 id="Specifications">Specifications</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">Specification</th>
   <th scope="col">Status</th>
   <th scope="col">Comment</th>
  </tr>
  <tr>
   <td>{{SpecName('WebGL', "#5.14.9", "isProgram")}}</td>
   <td>{{Spec2('WebGL')}}</td>
   <td>Initial definition.</td>
  </tr>
  <tr>
   <td>{{SpecName('OpenGL ES 2.0', "glIsProgram.xml", "glIsProgram")}}</td>
   <td>{{Spec2('OpenGL ES 2.0')}}</td>
   <td>Man page of the OpenGL API.</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.WebGLRenderingContext.isProgram")}}</p>

<h2 id="另请参见">另请参见</h2>

<ul>
 <li>{{domxref("WebGLRenderingContext.createProgram()")}}</li>
 <li>{{domxref("WebGLRenderingContext.deleteProgram()")}}</li>
 <li>{{domxref("WebGLRenderingContext.linkProgram()")}}</li>
 <li>{{domxref("WebGLRenderingContext.useProgram()")}}</li>
 <li>{{domxref("WebGLRenderingContext.validateProgram()")}}</li>
 <li>{{domxref("WebGLRenderingContext.getProgramParameter()")}}</li>
 <li>{{domxref("WebGLRenderingContext.getProgramInfoLog()")}}</li>
</ul>