Revision 1032092 of WebGLUniformLocation

<div>{{APIRef("WebGL")}}</div>

<p>The <strong>WebGLUniformLocation</strong> interface is part of the <a href="/en-US/docs/Web/API/WebGL_API">WebGL API</a> and represents the location of a uniform variable in a shader program.</p>

<h2 id="Description">Description</h2>

<p>The <code>WebGLUniformLocation</code> object does not define any methods or properties of its own and its content is not directly accessible. When working with <code>WebGLUniformLocation</code> objects, the following methods of the {{domxref("WebGLRenderingContext")}} are useful:</p>

<ul>
 <li>{{domxref("WebGLRenderingContext.getUniformLocation()")}}</li>
 <li>{{domxref("WebGLRenderingContext.uniform()")}}</li>
</ul>

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

<h3 id="Getting_an_uniform_location">Getting an uniform location</h3>

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

var location = gl.getUniformLocation(WebGLProgram, "uniformName");</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', "#5.10", "WebGLUniformLocation")}}</td>
   <td>{{Spec2('WebGL')}}</td>
   <td>Initial definition.</td>
  </tr>
 </tbody>
</table>

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

<div>{{CompatibilityTable}}</div>

<div id="compat-desktop">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Chrome</th>
   <th>Firefox (Gecko)</th>
   <th>Internet Explorer</th>
   <th>Opera</th>
   <th>Safari</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>{{CompatChrome("9")}}</td>
   <td>{{CompatGeckoDesktop("2.0")}}</td>
   <td>{{CompatIE("11")}}</td>
   <td>{{CompatOpera("12")}}</td>
   <td>{{CompatSafari("5.1")}}</td>
  </tr>
  <tr>
   <td>Available in workers</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatGeckoDesktop(44)}} [1]</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
  </tr>
 </tbody>
</table>
</div>

<div id="compat-mobile">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Android</th>
   <th>Chrome for Android</th>
   <th>Firefox Mobile (Gecko)</th>
   <th>IE Mobile</th>
   <th>Opera Mobile</th>
   <th>Safari Mobile</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>{{CompatUnknown}}</td>
   <td>25</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>12</td>
   <td>8.1</td>
  </tr>
  <tr>
   <td>Available in workers</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatGeckomobile(44)}} [1]</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
  </tr>
 </tbody>
</table>
</div>

<p>[1] This feature is behind a feature preference setting. In about:config, set <code>gfx.offscreencanvas.enabled</code> to <code>true</code>.</p>

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

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