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<title>The ImagickPixelIterator constructor</title>
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<h1 class="refname">ImagickPixelIterator::__construct</h1>
<p class="verinfo">(PECL imagick 2.0.0)</p><p class="refpurpose"><span class="refname">ImagickPixelIterator::__construct</span> — <span class="dc-title">The ImagickPixelIterator constructor</span></p>
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<div class="refsect1 description" id="refsect1-imagickpixeliterator.construct-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="methodname"><strong>ImagickPixelIterator::__construct</strong></span>
( <span class="methodparam"><span class="type"><a href="class.imagick.html" class="type Imagick">Imagick</a></span> <code class="parameter">$wand</code></span>
)</div>
<div class="warning"><strong class="warning">Warning</strong><p class="simpara">This function is
currently not documented; only its argument list is available.
</p></div>
<p class="para">
The ImagickPixelIterator constructor
</p>
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<div class="refsect1 returnvalues" id="refsect1-imagickpixeliterator.construct-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> on success.
</p>
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<div class="refsect1 examples" id="refsect1-imagickpixeliterator.construct-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-4128">
<p><strong>Example #1 <span class="function"><strong>ImagickPixelIterator::construct()</strong></span></strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /></span><span style="color: #007700">function </span><span style="color: #0000BB">construct</span><span style="color: #007700">(</span><span style="color: #0000BB">$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 /> </span><span style="color: #0000BB">$imageIterator </span><span style="color: #007700">= new \</span><span style="color: #0000BB">ImagickPixelIterator</span><span style="color: #007700">(</span><span style="color: #0000BB">$imagick</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">/* 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 /> </span><span style="color: #FF8000">/** @var $pixel \ImagickPixel */<br /> </span><span style="color: #007700">if (</span><span style="color: #0000BB">$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">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>
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