<!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>Clear resources associated with a PixelIterator</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="class.imagickpixeliterator.html">ImagickPixelIterator</a></div> <div class="next" style="text-align: right; float: right;"><a href="imagickpixeliterator.construct.html">ImagickPixelIterator::__construct</a></div> <div class="up"><a href="class.imagickpixeliterator.html">ImagickPixelIterator</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="imagickpixeliterator.clear" class="refentry"> <div class="refnamediv"> <h1 class="refname">ImagickPixelIterator::clear</h1> <p class="verinfo">(PECL imagick 2.0.0)</p><p class="refpurpose"><span class="refname">ImagickPixelIterator::clear</span> — <span class="dc-title">Clear resources associated with a PixelIterator</span></p> </div> <div class="refsect1 description" id="refsect1-imagickpixeliterator.clear-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><strong>ImagickPixelIterator::clear</strong></span> ( <span class="methodparam">void</span> )</div> <div class="warning"><strong class="warning">Warning</strong><p class="simpara">This function is currently not documented; only its argument list is available. </p></div> <p class="para"> Clear resources associated with a PixelIterator. </p> </div> <div class="refsect1 returnvalues" id="refsect1-imagickpixeliterator.clear-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <strong><code>TRUE</code></strong> on success. </p> </div> <div class="refsect1 examples" id="refsect1-imagickpixeliterator.clear-examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example" id="example-4127"> <p><strong>Example #1 <span class="function"><strong>ImagickPixelIterator::clear()</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">clear</span><span style="color: #007700">(</span><span style="color: #0000BB">$imagePath</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">$imagick </span><span style="color: #007700">= new \</span><span style="color: #0000BB">Imagick</span><span style="color: #007700">(</span><span style="color: #0000BB">realpath</span><span style="color: #007700">(</span><span style="color: #0000BB">$imagePath</span><span style="color: #007700">));<br /><br /> </span><span style="color: #0000BB">$imageIterator </span><span style="color: #007700">= </span><span style="color: #0000BB">$imagick</span><span style="color: #007700">-></span><span style="color: #0000BB">getPixelRegionIterator</span><span style="color: #007700">(</span><span style="color: #0000BB">100</span><span style="color: #007700">, </span><span style="color: #0000BB">100</span><span style="color: #007700">, </span><span style="color: #0000BB">250</span><span style="color: #007700">, </span><span style="color: #0000BB">200</span><span style="color: #007700">);<br /><br /> </span><span style="color: #FF8000">/* Loop through pixel rows */<br /> </span><span style="color: #007700">foreach (</span><span style="color: #0000BB">$imageIterator </span><span style="color: #007700">as </span><span style="color: #0000BB">$pixels</span><span style="color: #007700">) { <br /> </span><span style="color: #FF8000">/** @var $pixel \ImagickPixel */<br /> /* Loop through the pixels in the row (columns) */<br /> </span><span style="color: #007700">foreach (</span><span style="color: #0000BB">$pixels </span><span style="color: #007700">as </span><span style="color: #0000BB">$column </span><span style="color: #007700">=> </span><span style="color: #0000BB">$pixel</span><span style="color: #007700">) { <br /> if (</span><span style="color: #0000BB">$column </span><span style="color: #007700">% </span><span style="color: #0000BB">2</span><span style="color: #007700">) {<br /> </span><span style="color: #FF8000">/* Paint every second pixel black*/<br /> </span><span style="color: #0000BB">$pixel</span><span style="color: #007700">-></span><span style="color: #0000BB">setColor</span><span style="color: #007700">(</span><span style="color: #DD0000">"rgba(0, 0, 0, 0)"</span><span style="color: #007700">); <br /> }<br /> }<br /> </span><span style="color: #FF8000">/* Sync the iterator, this is important to do on each iteration */<br /> </span><span style="color: #0000BB">$imageIterator</span><span style="color: #007700">-></span><span style="color: #0000BB">syncIterator</span><span style="color: #007700">();<br /> }<br /><br /> </span><span style="color: #0000BB">$imageIterator</span><span style="color: #007700">-></span><span style="color: #0000BB">clear</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/jpg"</span><span style="color: #007700">);<br /> echo </span><span style="color: #0000BB">$imagick</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; 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