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<h2><span class="refentrytitle"><a name="libgimp-gimppixelfetcher.top_of_page"></a>gimppixelfetcher</span></h2>
<p>gimppixelfetcher — Functions for operating on pixel regions.</p>
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<div class="refsynopsisdiv">
<a name="libgimp-gimppixelfetcher.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">enum <a class="link" href="libgimp-gimppixelfetcher.html#GimpPixelFetcherEdgeMode" title="enum GimpPixelFetcherEdgeMode">GimpPixelFetcherEdgeMode</a>;
<a class="link" href="libgimp-gimppixelfetcher.html#GimpPixelFetcher" title="GimpPixelFetcher">GimpPixelFetcher</a>;
<a class="link" href="libgimp-gimppixelfetcher.html#GimpPixelFetcher" title="GimpPixelFetcher"><span class="returnvalue">GimpPixelFetcher</span></a> * <a class="link" href="libgimp-gimppixelfetcher.html#gimp-pixel-fetcher-new" title="gimp_pixel_fetcher_new ()">gimp_pixel_fetcher_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><span class="type">gboolean</span> shadow</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgimp-gimppixelfetcher.html#gimp-pixel-fetcher-set-edge-mode" title="gimp_pixel_fetcher_set_edge_mode ()">gimp_pixel_fetcher_set_edge_mode</a> (<em class="parameter"><code><a class="link" href="libgimp-gimppixelfetcher.html#GimpPixelFetcher" title="GimpPixelFetcher"><span class="type">GimpPixelFetcher</span></a> *pf</code></em>,
<em class="parameter"><code><a class="link" href="libgimp-gimppixelfetcher.html#GimpPixelFetcherEdgeMode" title="enum GimpPixelFetcherEdgeMode"><span class="type">GimpPixelFetcherEdgeMode</span></a> mode</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgimp-gimppixelfetcher.html#gimp-pixel-fetcher-set-bg-color" title="gimp_pixel_fetcher_set_bg_color ()">gimp_pixel_fetcher_set_bg_color</a> (<em class="parameter"><code><a class="link" href="libgimp-gimppixelfetcher.html#GimpPixelFetcher" title="GimpPixelFetcher"><span class="type">GimpPixelFetcher</span></a> *pf</code></em>,
<em class="parameter"><code>const <a href="../libgimpcolor/libgimpcolor-GimpRGB.html#GimpRGB"><span class="type">GimpRGB</span></a> *color</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgimp-gimppixelfetcher.html#gimp-pixel-fetcher-get-pixel" title="gimp_pixel_fetcher_get_pixel ()">gimp_pixel_fetcher_get_pixel</a> (<em class="parameter"><code><a class="link" href="libgimp-gimppixelfetcher.html#GimpPixelFetcher" title="GimpPixelFetcher"><span class="type">GimpPixelFetcher</span></a> *pf</code></em>,
<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> *pixel</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgimp-gimppixelfetcher.html#gimp-pixel-fetcher-put-pixel" title="gimp_pixel_fetcher_put_pixel ()">gimp_pixel_fetcher_put_pixel</a> (<em class="parameter"><code><a class="link" href="libgimp-gimppixelfetcher.html#GimpPixelFetcher" title="GimpPixelFetcher"><span class="type">GimpPixelFetcher</span></a> *pf</code></em>,
<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> *pixel</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgimp-gimppixelfetcher.html#gimp-pixel-fetcher-destroy" title="gimp_pixel_fetcher_destroy ()">gimp_pixel_fetcher_destroy</a> (<em class="parameter"><code><a class="link" href="libgimp-gimppixelfetcher.html#GimpPixelFetcher" title="GimpPixelFetcher"><span class="type">GimpPixelFetcher</span></a> *pf</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="libgimp-gimppixelfetcher.description"></a><h2>Description</h2>
<p>
These functions provide neighbourhood-based algorithms which get
dramatically slower on region boundaries, to the point where a special
treatment for neighbourhoods which are completely inside a tile is
called for. It hides the special treatment of tile borders, making
plug-in code more readable and shorter.
</p>
</div>
<div class="refsect1">
<a name="libgimp-gimppixelfetcher.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GimpPixelFetcherEdgeMode"></a><h3>enum GimpPixelFetcherEdgeMode</h3>
<pre class="programlisting">typedef enum {
GIMP_PIXEL_FETCHER_EDGE_NONE,
GIMP_PIXEL_FETCHER_EDGE_WRAP,
GIMP_PIXEL_FETCHER_EDGE_SMEAR,
GIMP_PIXEL_FETCHER_EDGE_BLACK,
GIMP_PIXEL_FETCHER_EDGE_BACKGROUND
} GimpPixelFetcherEdgeMode;
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="GimpPixelFetcher"></a><h3>GimpPixelFetcher</h3>
<pre class="programlisting">typedef struct _GimpPixelFetcher GimpPixelFetcher;</pre>
<p>
</p>
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<hr>
<div class="refsect2">
<a name="gimp-pixel-fetcher-new"></a><h3>gimp_pixel_fetcher_new ()</h3>
<pre class="programlisting"><a class="link" href="libgimp-gimppixelfetcher.html#GimpPixelFetcher" title="GimpPixelFetcher"><span class="returnvalue">GimpPixelFetcher</span></a> * gimp_pixel_fetcher_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><span class="type">gboolean</span> shadow</code></em>);</pre>
<p>
Initialize a pixel region from the drawable.
</p>
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<td><p><span class="term"><em class="parameter"><code>drawable</code></em> :</span></p></td>
<td>the <a class="link" href="libgimp-gimpdrawable.html#GimpDrawable" title="GimpDrawable"><span class="type">GimpDrawable</span></a> the new region will be attached to.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>shadow</code></em> :</span></p></td>
<td>a <span class="type">gboolean</span> indicating whether the region is attached to
the shadow tiles or the real <code class="literal">drawable</code> tiles.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a pointer to a <a class="link" href="libgimp-gimppixelrgn.html#GimpPixelRgn" title="GimpPixelRgn"><span class="type">GimpPixelRgn</span></a> structure (or NULL).</td>
</tr>
</tbody>
</table></div>
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<hr>
<div class="refsect2">
<a name="gimp-pixel-fetcher-set-edge-mode"></a><h3>gimp_pixel_fetcher_set_edge_mode ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gimp_pixel_fetcher_set_edge_mode (<em class="parameter"><code><a class="link" href="libgimp-gimppixelfetcher.html#GimpPixelFetcher" title="GimpPixelFetcher"><span class="type">GimpPixelFetcher</span></a> *pf</code></em>,
<em class="parameter"><code><a class="link" href="libgimp-gimppixelfetcher.html#GimpPixelFetcherEdgeMode" title="enum GimpPixelFetcherEdgeMode"><span class="type">GimpPixelFetcherEdgeMode</span></a> mode</code></em>);</pre>
<p>
Change the edage mode of a previously initialized pixel region.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
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<td><p><span class="term"><em class="parameter"><code>pf</code></em> :</span></p></td>
<td>a pointer to a previously initialized <a class="link" href="libgimp-gimppixelfetcher.html#GimpPixelFetcher" title="GimpPixelFetcher"><span class="type">GimpPixelFetcher</span></a>.</td>
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<tr>
<td><p><span class="term"><em class="parameter"><code>mode</code></em> :</span></p></td>
<td>the new edge mode from <a class="link" href="libgimp-gimppixelfetcher.html#GimpPixelFetcherEdgeMode" title="enum GimpPixelFetcherEdgeMode"><span class="type">GimpPixelFetcherEdgeMode</span></a>.</td>
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<hr>
<div class="refsect2">
<a name="gimp-pixel-fetcher-set-bg-color"></a><h3>gimp_pixel_fetcher_set_bg_color ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gimp_pixel_fetcher_set_bg_color (<em class="parameter"><code><a class="link" href="libgimp-gimppixelfetcher.html#GimpPixelFetcher" title="GimpPixelFetcher"><span class="type">GimpPixelFetcher</span></a> *pf</code></em>,
<em class="parameter"><code>const <a href="../libgimpcolor/libgimpcolor-GimpRGB.html#GimpRGB"><span class="type">GimpRGB</span></a> *color</code></em>);</pre>
<p>
Change the background color of a previously initialized pixel region.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>pf</code></em> :</span></p></td>
<td>a pointer to a previously initialized <a class="link" href="libgimp-gimppixelfetcher.html#GimpPixelFetcher" title="GimpPixelFetcher"><span class="type">GimpPixelFetcher</span></a>.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
<td>the color to be used as bg color.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gimp-pixel-fetcher-get-pixel"></a><h3>gimp_pixel_fetcher_get_pixel ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gimp_pixel_fetcher_get_pixel (<em class="parameter"><code><a class="link" href="libgimp-gimppixelfetcher.html#GimpPixelFetcher" title="GimpPixelFetcher"><span class="type">GimpPixelFetcher</span></a> *pf</code></em>,
<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> *pixel</code></em>);</pre>
<p>
Get a pixel from the pixel region.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>pf</code></em> :</span></p></td>
<td>a pointer to a previously initialized <a class="link" href="libgimp-gimppixelfetcher.html#GimpPixelFetcher" title="GimpPixelFetcher"><span class="type">GimpPixelFetcher</span></a>.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em> :</span></p></td>
<td>the x coordinate of the pixel to get.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y</code></em> :</span></p></td>
<td>the y coordinate of the pixel to get.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>pixel</code></em> :</span></p></td>
<td>the memory location where to return the pixel.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gimp-pixel-fetcher-put-pixel"></a><h3>gimp_pixel_fetcher_put_pixel ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gimp_pixel_fetcher_put_pixel (<em class="parameter"><code><a class="link" href="libgimp-gimppixelfetcher.html#GimpPixelFetcher" title="GimpPixelFetcher"><span class="type">GimpPixelFetcher</span></a> *pf</code></em>,
<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> *pixel</code></em>);</pre>
<p>
Set a pixel in the pixel region.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>pf</code></em> :</span></p></td>
<td>a pointer to a previously initialized <a class="link" href="libgimp-gimppixelfetcher.html#GimpPixelFetcher" title="GimpPixelFetcher"><span class="type">GimpPixelFetcher</span></a>.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em> :</span></p></td>
<td>the x coordinate of the pixel to set.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y</code></em> :</span></p></td>
<td>the y coordinate of the pixel to set.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>pixel</code></em> :</span></p></td>
<td>the pixel to set.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gimp-pixel-fetcher-destroy"></a><h3>gimp_pixel_fetcher_destroy ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gimp_pixel_fetcher_destroy (<em class="parameter"><code><a class="link" href="libgimp-gimppixelfetcher.html#GimpPixelFetcher" title="GimpPixelFetcher"><span class="type">GimpPixelFetcher</span></a> *pf</code></em>);</pre>
<p>
Close a previously initializd pixel region.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>pf</code></em> :</span></p></td>
<td>a pointer to a previously initialized <a class="link" href="libgimp-gimppixelfetcher.html#GimpPixelFetcher" title="GimpPixelFetcher"><span class="type">GimpPixelFetcher</span></a>.</td>
</tr></tbody>
</table></div>
</div>
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