document GLSL 1.20 status

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@@ -28,6 +28,7 @@ Contents
 <li><a href="#standalone">Stand-alone GLSL Compiler</a>
 <li><a href="#implementation">Compiler Implementation</a>
 <li><a href="#validation">Compiler Validation</a>
+<li><a href="#120">GLSL 1.20 support</a>
 </ul>
 
 
@@ -318,5 +319,39 @@ should be added.
 </p>
 
 
+
+<a name="120">
+<h2>GLSL 1.20 support</h2>
+
+<p>
+Support for GLSL version 1.20 is underway.  Status as follows.
+</p>
+
+<h3>Supported</h3>
+<ul>
+<li><code>mat2x3, mat2x4</code>, etc. types and functions
+<li><code>transpose(), outerProduct(), matrixCompMult()</code> functions
+(but untested)
+<li>precision qualifiers (lowp, mediump, highp)
+</ul>
+
+<h3>Partially Complete</h3>
+<ul>
+<li><code>invariant</code> qualifier
+</ul>
+
+<h3>Not Completed</h3>
+<ul>
+<li><code>array.length()</code> method
+<li><code>float[5] a;</code> array syntax
+<li><code>centroid</code> qualifier
+<li>unsized array constructors
+<li>initializers for uniforms
+<li>const initializers calling built-in functions
+</ul>
+
+
+
+
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