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<h2><span class="refentrytitle"><a name="libgimp-gimpregioniterator.top_of_page"></a>gimpregioniterator</span></h2>
<p>gimpregioniterator — Functions to traverse a pixel regions.</p>
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<div class="refsynopsisdiv">
<a name="libgimp-gimpregioniterator.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis"> <a class="link" href="libgimp-gimpregioniterator.html#GimpRgnIterator" title="GimpRgnIterator">GimpRgnIterator</a>;
<span class="returnvalue">void</span> (<a class="link" href="libgimp-gimpregioniterator.html#GimpRgnFunc1" title="GimpRgnFunc1 ()">*GimpRgnFunc1</a>) (<em class="parameter"><code>const <span class="type">guchar</span> *src</code></em>,
<em class="parameter"><code><span class="type">gint</span> bpp</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> data</code></em>);
<span class="returnvalue">void</span> (<a class="link" href="libgimp-gimpregioniterator.html#GimpRgnFunc2" title="GimpRgnFunc2 ()">*GimpRgnFunc2</a>) (<em class="parameter"><code>const <span class="type">guchar</span> *src</code></em>,
<em class="parameter"><code><span class="type">guchar</span> *dest</code></em>,
<em class="parameter"><code><span class="type">gint</span> bpp</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> data</code></em>);
<span class="returnvalue">void</span> (<a class="link" href="libgimp-gimpregioniterator.html#GimpRgnFuncSrc" title="GimpRgnFuncSrc ()">*GimpRgnFuncSrc</a>) (<em class="parameter"><code><span class="type">gint</span> x</code></em>,
<em class="parameter"><code><span class="type">gint</span> y</code></em>,
<em class="parameter"><code>const <span class="type">guchar</span> *src</code></em>,
<em class="parameter"><code><span class="type">gint</span> bpp</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> data</code></em>);
<span class="returnvalue">void</span> (<a class="link" href="libgimp-gimpregioniterator.html#GimpRgnFuncDest" title="GimpRgnFuncDest ()">*GimpRgnFuncDest</a>) (<em class="parameter"><code><span class="type">gint</span> x</code></em>,
<em class="parameter"><code><span class="type">gint</span> y</code></em>,
<em class="parameter"><code><span class="type">guchar</span> *dest</code></em>,
<em class="parameter"><code><span class="type">gint</span> bpp</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> data</code></em>);
<span class="returnvalue">void</span> (<a class="link" href="libgimp-gimpregioniterator.html#GimpRgnFuncSrcDest" title="GimpRgnFuncSrcDest ()">*GimpRgnFuncSrcDest</a>) (<em class="parameter"><code><span class="type">gint</span> x</code></em>,
<em class="parameter"><code><span class="type">gint</span> y</code></em>,
<em class="parameter"><code>const <span class="type">guchar</span> *src</code></em>,
<em class="parameter"><code><span class="type">guchar</span> *dest</code></em>,
<em class="parameter"><code><span class="type">gint</span> bpp</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> data</code></em>);
<a class="link" href="libgimp-gimpregioniterator.html#GimpRgnIterator" title="GimpRgnIterator"><span class="returnvalue">GimpRgnIterator</span></a> * <a class="link" href="libgimp-gimpregioniterator.html#gimp-rgn-iterator-new" title="gimp_rgn_iterator_new ()">gimp_rgn_iterator_new</a> (<em class="parameter"><code><a class="link" href="libgimp-gimpdrawable.html#GimpDrawable" title="GimpDrawable"><span class="type">GimpDrawable</span></a> *drawable</code></em>,
<em class="parameter"><code><a href="/local/head/share/gtk-doc/html/libgimpbase/libgimpbase-gimpbaseenums.html#GimpRunMode"><span class="type">GimpRunMode</span></a> unused</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgimp-gimpregioniterator.html#gimp-rgn-iterator-free" title="gimp_rgn_iterator_free ()">gimp_rgn_iterator_free</a> (<em class="parameter"><code><a class="link" href="libgimp-gimpregioniterator.html#GimpRgnIterator" title="GimpRgnIterator"><span class="type">GimpRgnIterator</span></a> *iter</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgimp-gimpregioniterator.html#gimp-rgn-iterator-src" title="gimp_rgn_iterator_src ()">gimp_rgn_iterator_src</a> (<em class="parameter"><code><a class="link" href="libgimp-gimpregioniterator.html#GimpRgnIterator" title="GimpRgnIterator"><span class="type">GimpRgnIterator</span></a> *iter</code></em>,
<em class="parameter"><code><a class="link" href="libgimp-gimpregioniterator.html#GimpRgnFuncSrc" title="GimpRgnFuncSrc ()"><span class="type">GimpRgnFuncSrc</span></a> func</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> data</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgimp-gimpregioniterator.html#gimp-rgn-iterator-dest" title="gimp_rgn_iterator_dest ()">gimp_rgn_iterator_dest</a> (<em class="parameter"><code><a class="link" href="libgimp-gimpregioniterator.html#GimpRgnIterator" title="GimpRgnIterator"><span class="type">GimpRgnIterator</span></a> *iter</code></em>,
<em class="parameter"><code><a class="link" href="libgimp-gimpregioniterator.html#GimpRgnFuncDest" title="GimpRgnFuncDest ()"><span class="type">GimpRgnFuncDest</span></a> func</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> data</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgimp-gimpregioniterator.html#gimp-rgn-iterator-src-dest" title="gimp_rgn_iterator_src_dest ()">gimp_rgn_iterator_src_dest</a> (<em class="parameter"><code><a class="link" href="libgimp-gimpregioniterator.html#GimpRgnIterator" title="GimpRgnIterator"><span class="type">GimpRgnIterator</span></a> *iter</code></em>,
<em class="parameter"><code><a class="link" href="libgimp-gimpregioniterator.html#GimpRgnFuncSrcDest" title="GimpRgnFuncSrcDest ()"><span class="type">GimpRgnFuncSrcDest</span></a> func</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> data</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgimp-gimpregioniterator.html#gimp-rgn-iterate1" title="gimp_rgn_iterate1 ()">gimp_rgn_iterate1</a> (<em class="parameter"><code><a class="link" href="libgimp-gimpdrawable.html#GimpDrawable" title="GimpDrawable"><span class="type">GimpDrawable</span></a> *drawable</code></em>,
<em class="parameter"><code><a href="/local/head/share/gtk-doc/html/libgimpbase/libgimpbase-gimpbaseenums.html#GimpRunMode"><span class="type">GimpRunMode</span></a> unused</code></em>,
<em class="parameter"><code><a class="link" href="libgimp-gimpregioniterator.html#GimpRgnFunc1" title="GimpRgnFunc1 ()"><span class="type">GimpRgnFunc1</span></a> func</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> data</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgimp-gimpregioniterator.html#gimp-rgn-iterate2" title="gimp_rgn_iterate2 ()">gimp_rgn_iterate2</a> (<em class="parameter"><code><a class="link" href="libgimp-gimpdrawable.html#GimpDrawable" title="GimpDrawable"><span class="type">GimpDrawable</span></a> *drawable</code></em>,
<em class="parameter"><code><a href="/local/head/share/gtk-doc/html/libgimpbase/libgimpbase-gimpbaseenums.html#GimpRunMode"><span class="type">GimpRunMode</span></a> unused</code></em>,
<em class="parameter"><code><a class="link" href="libgimp-gimpregioniterator.html#GimpRgnFunc2" title="GimpRgnFunc2 ()"><span class="type">GimpRgnFunc2</span></a> func</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> data</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="libgimp-gimpregioniterator.description"></a><h2>Description</h2>
<p>
The GimpRgnIterator functions provide a variety of common ways to
traverse a PixelRegion, using a pre-defined function pointer per
pixel.
</p>
</div>
<div class="refsect1">
<a name="libgimp-gimpregioniterator.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GimpRgnIterator"></a><h3>GimpRgnIterator</h3>
<pre class="programlisting">typedef struct _GimpRgnIterator GimpRgnIterator;</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="GimpRgnFunc1"></a><h3>GimpRgnFunc1 ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> (*GimpRgnFunc1) (<em class="parameter"><code>const <span class="type">guchar</span> *src</code></em>,
<em class="parameter"><code><span class="type">gint</span> bpp</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> data</code></em>);</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="GimpRgnFunc2"></a><h3>GimpRgnFunc2 ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> (*GimpRgnFunc2) (<em class="parameter"><code>const <span class="type">guchar</span> *src</code></em>,
<em class="parameter"><code><span class="type">guchar</span> *dest</code></em>,
<em class="parameter"><code><span class="type">gint</span> bpp</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> data</code></em>);</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="GimpRgnFuncSrc"></a><h3>GimpRgnFuncSrc ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> (*GimpRgnFuncSrc) (<em class="parameter"><code><span class="type">gint</span> x</code></em>,
<em class="parameter"><code><span class="type">gint</span> y</code></em>,
<em class="parameter"><code>const <span class="type">guchar</span> *src</code></em>,
<em class="parameter"><code><span class="type">gint</span> bpp</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> data</code></em>);</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="GimpRgnFuncDest"></a><h3>GimpRgnFuncDest ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> (*GimpRgnFuncDest) (<em class="parameter"><code><span class="type">gint</span> x</code></em>,
<em class="parameter"><code><span class="type">gint</span> y</code></em>,
<em class="parameter"><code><span class="type">guchar</span> *dest</code></em>,
<em class="parameter"><code><span class="type">gint</span> bpp</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> data</code></em>);</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="GimpRgnFuncSrcDest"></a><h3>GimpRgnFuncSrcDest ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> (*GimpRgnFuncSrcDest) (<em class="parameter"><code><span class="type">gint</span> x</code></em>,
<em class="parameter"><code><span class="type">gint</span> y</code></em>,
<em class="parameter"><code>const <span class="type">guchar</span> *src</code></em>,
<em class="parameter"><code><span class="type">guchar</span> *dest</code></em>,
<em class="parameter"><code><span class="type">gint</span> bpp</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> data</code></em>);</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="gimp-rgn-iterator-new"></a><h3>gimp_rgn_iterator_new ()</h3>
<pre class="programlisting"><a class="link" href="libgimp-gimpregioniterator.html#GimpRgnIterator" title="GimpRgnIterator"><span class="returnvalue">GimpRgnIterator</span></a> * gimp_rgn_iterator_new (<em class="parameter"><code><a class="link" href="libgimp-gimpdrawable.html#GimpDrawable" title="GimpDrawable"><span class="type">GimpDrawable</span></a> *drawable</code></em>,
<em class="parameter"><code><a href="/local/head/share/gtk-doc/html/libgimpbase/libgimpbase-gimpbaseenums.html#GimpRunMode"><span class="type">GimpRunMode</span></a> unused</code></em>);</pre>
<p>
Creates a new <a class="link" href="libgimp-gimpregioniterator.html#GimpRgnIterator" title="GimpRgnIterator"><span class="type">GimpRgnIterator</span></a> for <em class="parameter"><code>drawable</code></em>. The <a href="/local/head/share/gtk-doc/html/libgimpbase/libgimpbase-gimpbaseenums.html#GimpRunMode"><span class="type">GimpRunMode</span></a>
parameter is ignored. Use <a class="link" href="libgimp-gimpregioniterator.html#gimp-rgn-iterator-free" title="gimp_rgn_iterator_free ()"><code class="function">gimp_rgn_iterator_free()</code></a> to free thsi
iterator.
</p>
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<td><p><span class="term"><em class="parameter"><code>drawable</code></em> :</span></p></td>
<td>a <a class="link" href="libgimp-gimpdrawable.html#GimpDrawable" title="GimpDrawable"><span class="type">GimpDrawable</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>unused</code></em> :</span></p></td>
<td>ignored</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a newly allocated <a class="link" href="libgimp-gimpregioniterator.html#GimpRgnIterator" title="GimpRgnIterator"><span class="type">GimpRgnIterator</span></a>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gimp-rgn-iterator-free"></a><h3>gimp_rgn_iterator_free ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gimp_rgn_iterator_free (<em class="parameter"><code><a class="link" href="libgimp-gimpregioniterator.html#GimpRgnIterator" title="GimpRgnIterator"><span class="type">GimpRgnIterator</span></a> *iter</code></em>);</pre>
<p>
Frees the resources allocated for <em class="parameter"><code>iter</code></em>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>iter</code></em> :</span></p></td>
<td>a <a class="link" href="libgimp-gimpregioniterator.html#GimpRgnIterator" title="GimpRgnIterator"><span class="type">GimpRgnIterator</span></a>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gimp-rgn-iterator-src"></a><h3>gimp_rgn_iterator_src ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gimp_rgn_iterator_src (<em class="parameter"><code><a class="link" href="libgimp-gimpregioniterator.html#GimpRgnIterator" title="GimpRgnIterator"><span class="type">GimpRgnIterator</span></a> *iter</code></em>,
<em class="parameter"><code><a class="link" href="libgimp-gimpregioniterator.html#GimpRgnFuncSrc" title="GimpRgnFuncSrc ()"><span class="type">GimpRgnFuncSrc</span></a> func</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> data</code></em>);</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="gimp-rgn-iterator-dest"></a><h3>gimp_rgn_iterator_dest ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gimp_rgn_iterator_dest (<em class="parameter"><code><a class="link" href="libgimp-gimpregioniterator.html#GimpRgnIterator" title="GimpRgnIterator"><span class="type">GimpRgnIterator</span></a> *iter</code></em>,
<em class="parameter"><code><a class="link" href="libgimp-gimpregioniterator.html#GimpRgnFuncDest" title="GimpRgnFuncDest ()"><span class="type">GimpRgnFuncDest</span></a> func</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> data</code></em>);</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="gimp-rgn-iterator-src-dest"></a><h3>gimp_rgn_iterator_src_dest ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gimp_rgn_iterator_src_dest (<em class="parameter"><code><a class="link" href="libgimp-gimpregioniterator.html#GimpRgnIterator" title="GimpRgnIterator"><span class="type">GimpRgnIterator</span></a> *iter</code></em>,
<em class="parameter"><code><a class="link" href="libgimp-gimpregioniterator.html#GimpRgnFuncSrcDest" title="GimpRgnFuncSrcDest ()"><span class="type">GimpRgnFuncSrcDest</span></a> func</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> data</code></em>);</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="gimp-rgn-iterate1"></a><h3>gimp_rgn_iterate1 ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gimp_rgn_iterate1 (<em class="parameter"><code><a class="link" href="libgimp-gimpdrawable.html#GimpDrawable" title="GimpDrawable"><span class="type">GimpDrawable</span></a> *drawable</code></em>,
<em class="parameter"><code><a href="/local/head/share/gtk-doc/html/libgimpbase/libgimpbase-gimpbaseenums.html#GimpRunMode"><span class="type">GimpRunMode</span></a> unused</code></em>,
<em class="parameter"><code><a class="link" href="libgimp-gimpregioniterator.html#GimpRgnFunc1" title="GimpRgnFunc1 ()"><span class="type">GimpRgnFunc1</span></a> func</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> data</code></em>);</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="gimp-rgn-iterate2"></a><h3>gimp_rgn_iterate2 ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gimp_rgn_iterate2 (<em class="parameter"><code><a class="link" href="libgimp-gimpdrawable.html#GimpDrawable" title="GimpDrawable"><span class="type">GimpDrawable</span></a> *drawable</code></em>,
<em class="parameter"><code><a href="/local/head/share/gtk-doc/html/libgimpbase/libgimpbase-gimpbaseenums.html#GimpRunMode"><span class="type">GimpRunMode</span></a> unused</code></em>,
<em class="parameter"><code><a class="link" href="libgimp-gimpregioniterator.html#GimpRgnFunc2" title="GimpRgnFunc2 ()"><span class="type">GimpRgnFunc2</span></a> func</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> data</code></em>);</pre>
<p>
</p>
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