From 33058f2b292b3a581333bdfb21b8f671898c5060 Mon Sep 17 00:00:00 2001
From: Peter Bengtsson <mail@peterbe.com>
Date: Tue, 8 Dec 2020 14:40:17 -0500
Subject: initial commit

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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>
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