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  <!DOCTYPE html>  <html> <head>   <title>THREEx.glCapability.js</title>   <meta http-equiv="content-type" content="text/html; charset=UTF-8">   <link rel="stylesheet" media="all" href="docco.css" /> </head> <body>   <div id="container">     <div id="background"></div>            <div id="jump_to">         Jump To &hellip;         <div id="jump_wrapper">           <div id="jump_page">                                           <a class="source" href="THREEx.CelShader.html">                 THREEx.CelShader.js               </a>                                           <a class="source" href="THREEx.DeviceOrientationState.html">                 THREEx.DeviceOrientationState.js               </a>                                           <a class="source" href="THREEx.FullScreen.html">                 THREEx.FullScreen.js               </a>                                           <a class="source" href="THREEx.GeometryUtils.html">                 THREEx.GeometryUtils.js               </a>                                           <a class="source" href="THREEx.GeometryWobble.html">                 THREEx.GeometryWobble.js               </a>                                           <a class="source" href="THREEx.KeyboardState.html">                 THREEx.KeyboardState.js               </a>                                           <a class="source" href="THREEx.LogoTurtle.html">                 THREEx.LogoTurtle.js               </a>                                           <a class="source" href="THREEx.PlasmaShader.html">                 THREEx.PlasmaShader.js               </a>                                           <a class="source" href="THREEx.SkyMap.html">                 THREEx.SkyMap.js               </a>                                           <a class="source" href="THREEx.WindowResize.html">                 THREEx.WindowResize.js               </a>                                           <a class="source" href="THREEx.glCapability.html">                 THREEx.glCapability.js               </a>                                           <a class="source" href="THREEx.requestAnimationFrame.html">                 THREEx.requestAnimationFrame.js               </a>                                           <a class="source" href="THREEx.screenshot.html">                 THREEx.screenshot.js               </a>                                           <a class="source" href="threex.embedded.html">                 threex.embedded.js               </a>                        </div>         </div>       </div>          <table cellpadding="0" cellspacing="0">       <thead>         <tr>           <th class="docs">             <h1>               THREEx.glCapability.js             </h1>           </th>           <th class="code">           </th>         </tr>       </thead>       <tbody>                               <tr id="section-1">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-1">&#182;</a>               </div>                            </td>             <td class="code">               <div class="highlight"><pre><span class="cm">
</span> <span class="cm"> * Define namespace</span> <span class="cm">

  </span>
  <span class="k">if</span><span class="p">(</span><span class="k">typeof</span> <span class="nx">THREEx</span> <span class="o">===</span> <span class="s2">&quot;undefined&quot;</span><span class="p">)</span>        <span class="kd">var</span> <span class="nx">THREEx</span>        <span class="o">=</span> <span class="p">{};</span>
  
  <span class="cm">
</span> <span class="cm"> * return the capability of a WebGl context</span> <span class="cm"> *</span> <span class="cm"> * TODO to rewrite</span> <span class="cm"> * - heavily wased on webglreport on sourceforge</span> <span class="cm"> * - is there other/better properties</span> <span class="cm"> * - should i get a more readable output ?</span> <span class="cm"> * - another function ?</span> <span class="cm"> *</span> <span class="cm"> *
parameter: {WebGLRenderingContext} webgl context <span class="cm"> *
returns: {Object} capabilities <span class="cm">

  </span>
  <span class="nx">THREEx</span><span class="p">.</span><span class="nx">glCapability</span>        <span class="o">=</span> <span class="kd">function</span><span class="p">(</span><span class="nx">gl</span><span class="p">)</span>
  <span class="p">{</span></pre></div>             </td>           </tr>                               <tr id="section-2">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-2">&#182;</a>               </div>               <p>sanity check - gl context MUST BE WebGLRenderingContext</p>             </td>             <td class="code">               <div class="highlight"><pre>        <span class="nx">console</span><span class="p">.</span><span class="nx">assert</span><span class="p">(</span><span class="nx">gl</span> <span class="k">instanceof</span> <span class="nx">WebGLRenderingContext</span><span class="p">)</span></pre></div>             </td>           </tr>                               <tr id="section-3">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-3">&#182;</a>               </div>               <p>TODO find better names</p>             </td>             <td class="code">               <div class="highlight"><pre>        <span class="kd">var</span> <span class="nx">prout</span>        <span class="o">=</span> <span class="p">[</span><span class="s1">&#39;VERSION&#39;</span><span class="p">,</span> <span class="s1">&#39;SHADING_LANGUAGE_VERSION&#39;</span><span class="p">,</span> <span class="s1">&#39;VENDOR&#39;</span><span class="p">,</span> <span class="s1">&#39;RENDERER&#39;</span><span class="p">];</span>
          <span class="kd">var</span> <span class="nx">pixDepth</span>        <span class="o">=</span> <span class="p">[</span><span class="s1">&#39;RED_BITS&#39;</span><span class="p">,</span> <span class="s1">&#39;GREEN_BITS&#39;</span><span class="p">,</span> <span class="s1">&#39;BLUE_BITS&#39;</span><span class="p">,</span> <span class="s1">&#39;ALPHA_BITS&#39;</span><span class="p">,</span> <span class="s1">&#39;DEPTH_BITS&#39;</span><span class="p">,</span> <span class="s1">&#39;STENCIL_BITS&#39;</span><span class="p">];</span>
          <span class="kd">var</span> <span class="nx">slota</span>        <span class="o">=</span> <span class="p">[</span><span class="s1">&#39;MAX_RENDERBUFFER_SIZE&#39;</span><span class="p">,</span> <span class="s1">&#39;MAX_COMBINED_TEXTURE_IMAGE_UNITS&#39;</span><span class="p">,</span> <span class="s1">&#39;MAX_CUBE_MAP_TEXTURE_SIZE&#39;</span>
                                  <span class="p">,</span> <span class="s1">&#39;MAX_FRAGMENT_UNIFORM_VECTORS&#39;</span><span class="p">,</span> <span class="s1">&#39;MAX_TEXTURE_IMAGE_UNITS&#39;</span>
                                  <span class="p">,</span> <span class="s1">&#39;MAX_TEXTURE_SIZE&#39;</span><span class="p">,</span> <span class="s1">&#39;MAX_VERTEX_ATTRIBS&#39;</span>
                                  <span class="p">,</span> <span class="s1">&#39;MAX_VERTEX_ATTRIBS&#39;</span><span class="p">,</span> <span class="s1">&#39;MAX_VERTEX_TEXTURE_IMAGE_UNITS&#39;</span>
                                  <span class="p">,</span> <span class="s1">&#39;MAX_VERTEX_UNIFORM_VECTORS&#39;</span><span class="p">];</span>        
          <span class="kd">var</span> <span class="nx">sloti</span>        <span class="o">=</span> <span class="p">[</span><span class="s1">&#39;ALIASED_LINE_WIDTH_RANGE&#39;</span><span class="p">,</span> <span class="s1">&#39;ALIASED_POINT_SIZE_RANGE&#39;</span><span class="p">,</span> <span class="s1">&#39;MAX_VIEWPORT_DIMS&#39;</span><span class="p">];</span>
          
          <span class="kd">var</span> <span class="nx">info</span>        <span class="o">=</span> <span class="p">{};</span>
          <span class="kd">var</span> <span class="nx">collect</span>        <span class="o">=</span> <span class="kd">function</span><span class="p">(</span><span class="nx">arr</span><span class="p">){</span>
                  <span class="nx">arr</span><span class="p">.</span><span class="nx">forEach</span><span class="p">(</span><span class="kd">function</span><span class="p">(</span><span class="nx">parameter</span><span class="p">){</span></pre></div>             </td>           </tr>                               <tr id="section-4">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-4">&#182;</a>               </div>               <p>console.log('parameter', parameter)</p>             </td>             <td class="code">               <div class="highlight"><pre>                        <span class="nx">info</span><span class="p">[</span><span class="nx">parameter</span><span class="p">]</span>        <span class="o">=</span> <span class="nx">gl</span><span class="p">.</span><span class="nx">getParameter</span><span class="p">(</span><span class="nx">gl</span><span class="p">[</span><span class="nx">parameter</span><span class="p">])</span>
                  <span class="p">})</span>
          <span class="p">}</span>
          
          <span class="nx">collect</span><span class="p">(</span><span class="nx">prout</span><span class="p">);</span>
          <span class="nx">collect</span><span class="p">(</span><span class="nx">pixDepth</span><span class="p">);</span>
          <span class="nx">collect</span><span class="p">(</span><span class="nx">slota</span><span class="p">);</span>
          <span class="nx">collect</span><span class="p">(</span><span class="nx">sloti</span><span class="p">)</span>
          </pre></div>             </td>           </tr>                               <tr id="section-5">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-5">&#182;</a>               </div>               <p>special case to get the extensions</p>             </td>             <td class="code">               <div class="highlight"><pre>        <span class="nx">info</span><span class="p">[</span><span class="s1">&#39;SUPPORTED_EXTENSIONS&#39;</span><span class="p">]</span>        <span class="o">=</span> <span class="nx">gl</span><span class="p">.</span><span class="nx">getSupportedExtensions</span><span class="p">()</span>
          </pre></div>             </td>           </tr>                               <tr id="section-6">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-6">&#182;</a>               </div>               <p>console.log("info");
  console.dir(info)</p>             </td>             <td class="code">               <div class="highlight"><pre>        <span class="k">return</span> <span class="nx">info</span><span class="p">;</span>
  <span class="p">}</span>
  
  </pre></div>             </td>           </tr>                </tbody>     </table>   </div> </body> </html> 


(C) Æliens 04/09/2009

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