- Document the antialising functions and how they work

Feel free to "fix" my english or grammar, or make it even more clear


git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@195682 c90b9560-bf6c-de11-be94-00142212c4b1

reference/image/functions/imageantialias.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.4 $ -->
+<!-- $Revision: 1.5 $ -->
  <refentry id="function.imageantialias">
   <refnamediv>
    <refname>imageantialias</refname>
@@ -14,9 +14,17 @@
      <methodparam><type>resource</type><parameter>im</parameter></methodparam>
      <methodparam><type>bool</type><parameter>on</parameter></methodparam>
     </methodsynopsis>
-    
-    &warn.undocumented.func;
-    &note.bundled.gd;
+   <para>
+   Activate the fast drawing antialiased methods for lines and polygons.
+   It does not support alpha components. It works using a direct blend 
+   operation. It works only with truecolor images.
+   </para>    
+   <para>
+   Using antialiased primitives with transparent background color can end with
+   some unexpected results. The blend method uses the background color as any
+   other colors. The lack of alpha component support does not allow an alpha
+   based antialiasing method.
+   </para>
    <para>
     See also <function>imagecreatetruecolor</function>.
    </para>