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<?xml version="1.0" encoding="UTF-8"?>
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  <title>ImageMagick: MagickWand, C API for ImageMagick: Pixel Iterator Methods</title>
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<p class="navigation-index">[ <a href="#ClearPixelIterator">ClearPixelIterator</a> | <a href="#DestroyPixelIterator">DestroyPixelIterator</a> | <a href="#IsPixelIterator">IsPixelIterator</a> | <a href="#NewPixelIterator">NewPixelIterator</a> | <a href="#PixelClearIteratorException">PixelClearIteratorException</a> | <a href="#NewPixelRegionIterator">NewPixelRegionIterator</a> | <a href="#PixelGetIteratorException">PixelGetIteratorException</a> | <a href="#PixelGetNextIteratorRow">PixelGetNextIteratorRow</a> | <a href="#PixelGetPreviousIteratorRow">PixelGetPreviousIteratorRow</a> | <a href="#PixelResetIterator">PixelResetIterator</a> | <a href="#PixelSetFirstIteratorRow">PixelSetFirstIteratorRow</a> | <a href="#PixelSetIteratorRow">PixelSetIteratorRow</a> | <a href="#PixelSetLastIteratorRow">PixelSetLastIteratorRow</a> | <a href="#PixelSyncIterator">PixelSyncIterator</a> ]</p>

<div style="margin: auto;">
  <h2><a name="ClearPixelIterator">ClearPixelIterator</a></h2>
</div>

<p>ClearPixelIterator() clear resources associated with a PixelIterator.</p>

<p>The format of the ClearPixelIterator method is:</p>

<pre class="code">
  PixelIterator *ClearPixelIterator(PixelIterator *iterator)
</pre>

<p>A description of each parameter follows:</p>

<h4>iterator</h4>
<p>The pixel iterator.</p>


<div style="margin: auto;">
  <h2><a name="DestroyPixelIterator">DestroyPixelIterator</a></h2>
</div>

<p>DestroyPixelIterator() deallocates resources associated with a PixelIterator.</p>

<p>The format of the DestroyPixelIterator method is:</p>

<pre class="code">
  PixelIterator *DestroyPixelIterator(PixelIterator *iterator)
</pre>

<p>A description of each parameter follows:</p>

<h4>iterator</h4>
<p>The pixel iterator.</p>


<div style="margin: auto;">
  <h2><a name="IsPixelIterator">IsPixelIterator</a></h2>
</div>

<p>IsPixelIterator() returns MagickTrue if the iterator is verified as a pixel iterator.</p>

<p>The format of the IsPixelIterator method is:</p>

<pre class="code">
  MagickBooleanType IsPixelIterator(const PixelIterator *iterator)
</pre>

<p>A description of each parameter follows:</p>

<h4>iterator</h4>
<p>The magick iterator.</p>

<div style="margin: auto;">
  <h2><a name="NewPixelIterator">NewPixelIterator</a></h2>
</div>

<p>NewPixelIterator() returns a new pixel iterator.</p>

<p>The format of the NewPixelIterator method is:</p>

<pre class="code">
  PixelIterator NewPixelIterator(MagickWand *wand)
</pre>

<p>A description of each parameter follows:</p>

<h4>wand</h4>
<p>The magick wand.</p>

<div style="margin: auto;">
  <h2><a name="PixelClearIteratorException">PixelClearIteratorException</a></h2>
</div>

<p>PixelClearIteratorException() clear any exceptions associated with the iterator.</p>

<p>The format of the PixelClearIteratorException method is:</p>

<pre class="code">
  MagickBooleanType PixelClearIteratorException(PixelIterator *wand)
</pre>

<p>A description of each parameter follows:</p>

<h4>wand</h4>
<p>The pixel wand.</p>

<div style="margin: auto;">
  <h2><a name="NewPixelRegionIterator">NewPixelRegionIterator</a></h2>
</div>

<p>NewPixelRegionIterator() returns a new pixel iterator.</p>

<p>The format of the NewPixelRegionIterator method is:</p>

<pre class="code">
  PixelIterator NewPixelRegionIterator(MagickWand *wand,const long x,
    const long y,const unsigned long columns,const unsigned long rows,
    const MagickBooleanType modify)
</pre>

<p>A description of each parameter follows:</p>

<h4>wand</h4>
<p>The magick wand.</p>

<h4>x,y,columns,rows</h4>
<p>These values define the perimeter of a region of pixels.</p>

<div style="margin: auto;">
  <h2><a name="PixelGetIteratorException">PixelGetIteratorException</a></h2>
</div>

<p>PixelGetIteratorException() returns the severity, reason, and description of any error that occurs when using other methods in this API.</p>

<p>The format of the PixelGetIteratorException method is:</p>

<pre class="code">
  char *PixelGetIteratorException(const Pixeliterator *iterator,
    ExceptionType *severity)
</pre>

<p>A description of each parameter follows:</p>

<h4>iterator</h4>
<p>The pixel iterator.</p>

<h4>severity</h4>
<p>The severity of the error is returned here.</p>

<div style="margin: auto;">
  <h2><a name="PixelGetNextIteratorRow">PixelGetNextIteratorRow</a></h2>
</div>

<p>PixelGetNextIteratorRow() returns the next row as an array of pixel wands from the pixel iterator.</p>

<p>The format of the PixelGetNextRow method is:</p>

<pre class="code">
  PixelWand **PixelGetNextRow(PixelIterator *iterator,
    unsigned long *number_wands)
</pre>

<p>A description of each parameter follows:</p>

<h4>iterator</h4>
<p>The pixel iterator.</p>

<h4>number_wands</h4>
<p>The number of pixel wands.</p>

<div style="margin: auto;">
  <h2><a name="PixelGetPreviousIteratorRow">PixelGetPreviousIteratorRow</a></h2>
</div>

<p>PixelGetPreviousIteratorRow() returns the previous row as an array of pixel wands from the pixel iterator.</p>

<p>The format of the PixelGetPreviousRow method is:</p>

<pre class="code">
  PixelWand **PixelGetPreviousRow(PixelIterator *iterator,
    unsigned long *number_wands)
</pre>

<p>A description of each parameter follows:</p>

<h4>iterator</h4>
<p>The pixel iterator.</p>

<h4>number_wands</h4>
<p>The number of pixel wands.</p>

<div style="margin: auto;">
  <h2><a name="PixelResetIterator">PixelResetIterator</a></h2>
</div>

<p>PixelResetIterator() resets the pixel iterator.  Use it in conjunction with PixelGetNextPixel() to iterate over all the pixels in a pixel container.</p>

<p>The format of the PixelResetIterator method is:</p>

<pre class="code">
  void PixelResetIterator(PixelIterator *iterator)
</pre>

<p>A description of each parameter follows:</p>

<h4>iterator</h4>
<p>The pixel iterator.</p>

<div style="margin: auto;">
  <h2><a name="PixelSetFirstIteratorRow">PixelSetFirstIteratorRow</a></h2>
</div>

<p>PixelSetFirstIteratorRow() sets the pixel iterator to the first pixel row.</p>

<p>The format of the PixelSetFirstIteratorRow method is:</p>

<pre class="code">
  void PixelSetFirstIteratorRow(PixelIterator *iterator)
</pre>

<p>A description of each parameter follows:</p>

<h4>iterator</h4>
<p>The magick iterator.</p>

<div style="margin: auto;">
  <h2><a name="PixelSetIteratorRow">PixelSetIteratorRow</a></h2>
</div>

<p>PixelSetIteratorRow() set the pixel iterator row.</p>

<p>The format of the PixelSetIteratorRow method is:</p>

<pre class="code">
  MagickBooleanType PixelSetIteratorRow(PixelIterator *iterator,
    const long row)
</pre>

<p>A description of each parameter follows:</p>

<h4>iterator</h4>
<p>The pixel iterator.</p>


<div style="margin: auto;">
  <h2><a name="PixelSetLastIteratorRow">PixelSetLastIteratorRow</a></h2>
</div>

<p>PixelSetLastIteratorRow() sets the pixel iterator to the last pixel row.</p>

<p>The format of the PixelSetLastIteratorRow method is:</p>

<pre class="code">
  void PixelSetLastIteratorRow(PixelIterator *iterator)
</pre>

<p>A description of each parameter follows:</p>

<h4>iterator</h4>
<p>The magick iterator.</p>

<div style="margin: auto;">
  <h2><a name="PixelSyncIterator">PixelSyncIterator</a></h2>
</div>

<p>PixelSyncIterator() syncs the pixel iterator.</p>

<p>The format of the PixelSyncIterator method is:</p>

<pre class="code">
  MagickBooleanType PixelSyncIterator(PixelIterator *iterator)
</pre>

<p>A description of each parameter follows:</p>

<h4>iterator</h4>
<p>The pixel iterator.</p>


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