<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Evaluate expression for each pixel in the image</title>
</head>
<body><div class="manualnavbar" style="text-align: center;">
<div class="prev" style="text-align: left; float: left;"><a href="imagick.functionimage.html">Imagick::functionImage</a></div>
<div class="next" style="text-align: right; float: right;"><a href="imagick.gammaimage.html">Imagick::gammaImage</a></div>
<div class="up"><a href="class.imagick.html">Imagick</a></div>
<div class="home"><a href="index.html">PHP Manual</a></div>
</div><hr /><div id="imagick.fximage" class="refentry">
<div class="refnamediv">
<h1 class="refname">Imagick::fxImage</h1>
<p class="verinfo">(PECL imagick 2.0.0)</p><p class="refpurpose"><span class="refname">Imagick::fxImage</span> — <span class="dc-title">Evaluate expression for each pixel in the image</span></p>
</div>
<div class="refsect1 description" id="refsect1-imagick.fximage-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type"><a href="class.imagick.html" class="type Imagick">Imagick</a></span> <span class="methodname"><strong>Imagick::fxImage</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$expression</code></span>
[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$channel</code><span class="initializer"> = Imagick::CHANNEL_DEFAULT</span></span>
] )</div>
<p class="para rdfs-comment">
Evaluate expression for each pixel in the image. Consult <a href="http://www.imagemagick.org/script/fx.php" class="link external">» The Fx Special Effects Image
Operator</a> for more information.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-imagick.fximage-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<code class="parameter">expression</code></dt>
<dd>
<p class="para">
The expression.
</p>
</dd>
<dt>
<code class="parameter">channel</code></dt>
<dd>
<p class="para">
Provide any channel constant that is valid for your channel mode. To
apply to more than one channel, combine channeltype constants using
bitwise operators. Refer to this
list of <a href="imagick.constants.html#imagick.constants.channel" class="link">channel constants</a>.
</p>
</dd>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-imagick.fximage-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> on success.
</p>
</div>
<div class="refsect1 errors" id="refsect1-imagick.fximage-errors">
<h3 class="title">Errors/Exceptions</h3>
<p class="para">
Throws ImagickException on error.
</p>
</div>
<div class="refsect1 examples" id="refsect1-imagick.fximage-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-3921">
<p><strong>Example #1 <span class="function"><strong>Imagick::fxImage()</strong></span></strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /></span><span style="color: #007700">function </span><span style="color: #0000BB">fxImage</span><span style="color: #007700">() {<br /> </span><span style="color: #0000BB">$imagick </span><span style="color: #007700">= new \</span><span style="color: #0000BB">Imagick</span><span style="color: #007700">();<br /> </span><span style="color: #0000BB">$imagick</span><span style="color: #007700">-></span><span style="color: #0000BB">newPseudoImage</span><span style="color: #007700">(</span><span style="color: #0000BB">200</span><span style="color: #007700">, </span><span style="color: #0000BB">200</span><span style="color: #007700">, </span><span style="color: #DD0000">"xc:white"</span><span style="color: #007700">);<br /><br /> </span><span style="color: #0000BB">$fx </span><span style="color: #007700">= </span><span style="color: #DD0000">'xx=i-w/2; yy=j-h/2; rr=hypot(xx,yy); (.5-rr/140)*1.2+.5'</span><span style="color: #007700">;<br /> </span><span style="color: #0000BB">$fxImage </span><span style="color: #007700">= </span><span style="color: #0000BB">$imagick</span><span style="color: #007700">-></span><span style="color: #0000BB">fxImage</span><span style="color: #007700">(</span><span style="color: #0000BB">$fx</span><span style="color: #007700">);<br /><br /> </span><span style="color: #0000BB">header</span><span style="color: #007700">(</span><span style="color: #DD0000">"Content-Type: image/png"</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">$fxImage</span><span style="color: #007700">-></span><span style="color: #0000BB">setimageformat</span><span style="color: #007700">(</span><span style="color: #DD0000">'png'</span><span style="color: #007700">);<br /> echo </span><span style="color: #0000BB">$fxImage</span><span style="color: #007700">-></span><span style="color: #0000BB">getImageBlob</span><span style="color: #007700">();<br />}<br /><br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
</div>
</div><hr /><div class="manualnavbar" style="text-align: center;">
<div class="prev" style="text-align: left; float: left;"><a href="imagick.functionimage.html">Imagick::functionImage</a></div>
<div class="next" style="text-align: right; float: right;"><a href="imagick.gammaimage.html">Imagick::gammaImage</a></div>
<div class="up"><a href="class.imagick.html">Imagick</a></div>
<div class="home"><a href="index.html">PHP Manual</a></div>
</div></body></html>
