From 4a6f7e12d89f6b228d1fdcde9bbcfd12be9c2775 Mon Sep 17 00:00:00 2001
From: Hannes Magnusson <bjori@php.net>
Date: Sat, 13 Oct 2007 17:52:19 +0000
Subject: [PATCH] Intergrade 3years old user note by ttoohey at php dot net

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@244152 c90b9560-bf6c-de11-be94-00142212c4b1
---
 .../image/functions/imagelayereffect.xml      | 45 ++++++++++++++++++-
 1 file changed, 43 insertions(+), 2 deletions(-)

diff --git a/reference/image/functions/imagelayereffect.xml b/reference/image/functions/imagelayereffect.xml
index bb1132737c..b18c4a04f8 100755
--- a/reference/image/functions/imagelayereffect.xml
+++ b/reference/image/functions/imagelayereffect.xml
@@ -1,5 +1,5 @@
 <?xml version='1.0' encoding='iso-8859-1'?>
-<!-- $Revision: 1.7 $ -->
+<!-- $Revision: 1.8 $ -->
 <refentry xml:id="function.imagelayereffect" xmlns="http://docbook.org/ns/docbook">
  <refnamediv>
   <refname>imagelayereffect</refname>
@@ -12,7 +12,9 @@
    <methodparam><type>resource</type><parameter>image</parameter></methodparam>
    <methodparam><type>int</type><parameter>effect</parameter></methodparam>
   </methodsynopsis>
-  &warn.undocumented.func;
+  <para>
+   Set the alpha blending flag to use the bundled libgd layering effects.
+  </para>
  </refsect1>
  <refsect1 role="parameters">
   &reftitle.parameters;
@@ -23,6 +25,45 @@
      <term><parameter>effect</parameter></term>
      <listitem>
       <para>
+       One of the following constants:
+       <variablelist>
+        <varlistentry>
+         <term><constant>IMG_EFFECT_REPLACE</constant></term>
+         <listitem>
+          <simpara>
+           Use pixel replacement (equivalent of passing &true; to
+           <function>imagealphablending</function>)
+          </simpara>
+         </listitem>
+        </varlistentry>
+        <varlistentry>
+         <term><constant>IMG_EFFECT_ALPHABLEND</constant></term>
+         <listitem>
+          <simpara>
+           Use normal pixel blending (equivalent of passing &false; to
+           <function>imagealphablending</function>)
+          </simpara>
+         </listitem>
+        </varlistentry>
+        <varlistentry>
+         <term><constant>IMG_EFFECT_NORMAL</constant></term>
+         <listitem>
+          <simpara>
+           Same as <constant>IMG_EFFECT_ALPHABLEND</constant>.
+          </simpara>
+         </listitem>
+        </varlistentry>
+        <varlistentry>
+         <term><constant>IMG_EFFECT_OVERLAY</constant></term>
+         <listitem>
+          <simpara>
+           Overlay has the effect that black background pixels will remain
+           black, white background pixels will remain white, but grey
+           background pixels will take the colour of the foreground pixel.
+          </simpara>
+         </listitem>
+        </varlistentry>
+       </variablelist>
       </para>
      </listitem>
     </varlistentry>