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

<p><strong>WebGLRenderingContext.getProgramInfoLog</strong>  返回参数中指定的{{domxref("WebGLProgram")}} object 的信息. 这些信息包括在linking过程中的错误以及 <code>WebGLProgram</code> objects 合法性检查的错误.</p>

<h2 id="Syntax">Syntax</h2>

<pre class="syntaxbox">gl.getProgramInfoLog(program);</pre>

<h3 id="Parameters">Parameters</h3>

<dl>
 <dt>program</dt>
 <dd>A {{domxref("WebGLProgram")}} to query.</dd>
</dl>

<h3 id="Return_value">Return value</h3>

<p>返回 {{domxref("DOMString")}} 包含 diagnostic , warning ...等等关于上一次linking和valiadation操作的信息. 对于刚刚创建的{{domxref("WebGLProgram")}} object , 返回一个空字符串.</p>

<h2 id="Examples">Examples</h2>

<h3 id="Checking_program_errors">Checking program errors</h3>

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

//vsSource is the source-code-string of vertex-shader
//fsSource is the source-code-string of fragment-shader
var vertexShader = loadShader(gl, gl.VERTEX_SHADER, vsSource);
var fragmentShader = loadShader(gl, gl.FRAGMENT_SHADER, fsSource);

// Attach pre-existing shaders
gl.attachShader(program, vertexShader);
gl.attachShader(program, fragmentShader);

gl.linkProgram(program);

gl.getProgramInfoLog(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", "getProgramInfoLog")}}</td>
   <td>{{Spec2('WebGL')}}</td>
   <td>Initial definition.</td>
  </tr>
  <tr>
   <td>{{SpecName('OpenGL ES 2.0', "glGetProgramInfoLog.xml", "glGetProgramInfoLog")}}</td>
   <td>{{Spec2('OpenGL ES 2.0')}}</td>
   <td>Man page of the OpenGL API.</td>
  </tr>
 </tbody>
</table>

<h2 id="Browser_compatibility">Browser compatibility</h2>

<p>{{Compat("api.WebGLRenderingContext.getProgramInfoLog")}}</p>

<h2 id="See_also">See also</h2>

<ul>
 <li>{{domxref("WebGLRenderingContext.getShaderInfoLog()")}}</li>
 <li>{{domxref("WebGLRenderingContext.getError()")}}</li>
</ul>