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<title>GIMP Library Reference Manual: gimptile</title>
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<h2><span class="refentrytitle"><a name="libgimp-gimptile.top_of_page"></a>gimptile</span></h2>
<p>gimptile — Functions for working with tiles.</p>
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<div class="refsect1">
<a name="libgimp-gimptile.functions"></a><h2>Functions</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="libgimp-gimptile.html#gimp-tile-ref" title="gimp_tile_ref ()">gimp_tile_ref</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="libgimp-gimptile.html#gimp-tile-ref-zero" title="gimp_tile_ref_zero ()">gimp_tile_ref_zero</a> <span class="c_punctuation">()</span>
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</tr>
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<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="libgimp-gimptile.html#gimp-tile-unref" title="gimp_tile_unref ()">gimp_tile_unref</a> <span class="c_punctuation">()</span>
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<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="libgimp-gimptile.html#gimp-tile-flush" title="gimp_tile_flush ()">gimp_tile_flush</a> <span class="c_punctuation">()</span>
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<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="libgimp-gimptile.html#gimp-tile-cache-size" title="gimp_tile_cache_size ()">gimp_tile_cache_size</a> <span class="c_punctuation">()</span>
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</tr>
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<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="libgimp-gimptile.html#gimp-tile-cache-ntiles" title="gimp_tile_cache_ntiles ()">gimp_tile_cache_ntiles</a> <span class="c_punctuation">()</span>
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<div class="refsect1">
<a name="libgimp-gimptile.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody><tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="libgimp-gimptile.html#GimpTile" title="GimpTile">GimpTile</a></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="libgimp-gimptile.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">
</pre>
</div>
<div class="refsect1">
<a name="libgimp-gimptile.description"></a><h2>Description</h2>
<p>Functions for working with tiles.</p>
</div>
<div class="refsect1">
<a name="libgimp-gimptile.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="gimp-tile-ref"></a><h3>gimp_tile_ref ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gimp_tile_ref (<em class="parameter"><code><a class="link" href="libgimp-gimptile.html#GimpTile" title="GimpTile"><span class="type">GimpTile</span></a> *tile</code></em>);</pre>
<p>
</p>
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<hr>
<div class="refsect2">
<a name="gimp-tile-ref-zero"></a><h3>gimp_tile_ref_zero ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gimp_tile_ref_zero (<em class="parameter"><code><a class="link" href="libgimp-gimptile.html#GimpTile" title="GimpTile"><span class="type">GimpTile</span></a> *tile</code></em>);</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="gimp-tile-unref"></a><h3>gimp_tile_unref ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gimp_tile_unref (<em class="parameter"><code><a class="link" href="libgimp-gimptile.html#GimpTile" title="GimpTile"><span class="type">GimpTile</span></a> *tile</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> dirty</code></em>);</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="gimp-tile-flush"></a><h3>gimp_tile_flush ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gimp_tile_flush (<em class="parameter"><code><a class="link" href="libgimp-gimptile.html#GimpTile" title="GimpTile"><span class="type">GimpTile</span></a> *tile</code></em>);</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="gimp-tile-cache-size"></a><h3>gimp_tile_cache_size ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gimp_tile_cache_size (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gulong"><span class="type">gulong</span></a> kilobytes</code></em>);</pre>
<p>Sets the size of the tile cache on the plug-in side. The tile cache
is used to reduce the number of tiles exchanged between the GIMP core
and the plug-in. See also <a class="link" href="libgimp-gimptile.html#gimp-tile-cache-ntiles" title="gimp_tile_cache_ntiles ()"><code class="function">gimp_tile_cache_ntiles()</code></a>.</p>
<div class="refsect3">
<a name="id-1.2.4.26.7.6.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>kilobytes</p></td>
<td class="parameter_description"><p>new cache size in kilobytes</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gimp-tile-cache-ntiles"></a><h3>gimp_tile_cache_ntiles ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gimp_tile_cache_ntiles (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gulong"><span class="type">gulong</span></a> ntiles</code></em>);</pre>
<p>Sets the size of the tile cache on the plug-in side. This function
is similar to <a class="link" href="libgimp-gimptile.html#gimp-tile-cache-size" title="gimp_tile_cache_size ()"><code class="function">gimp_tile_cache_size()</code></a> but allows to specify the
number of tiles directly.</p>
<p>If your plug-in access pixels tile-by-tile, it doesn't need a tile
cache at all. If however the plug-in accesses drawable pixel data
row-by-row, it should set the tile cache large enough to hold the
number of tiles per row. Double this size if your plug-in uses
shadow tiles.</p>
<div class="refsect3">
<a name="id-1.2.4.26.7.7.6"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>ntiles</p></td>
<td class="parameter_description"><p>number of tiles that should fit into the cache</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="libgimp-gimptile.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GimpTile"></a><h3>GimpTile</h3>
<pre class="programlisting">typedef struct {
guint ewidth; /* the effective width of the tile */
guint eheight; /* the effective height of the tile */
guint bpp; /* the bytes per pixel (1, 2, 3 or 4 ) */
guint tile_num; /* the number of this tile within the drawable */
guint16 ref_count; /* reference count for the tile */
guint dirty : 1; /* is the tile dirty? has it been modified? */
guint shadow: 1; /* is this a shadow tile */
guchar *data; /* the pixel data for the tile */
GimpDrawable *drawable; /* the drawable this tile came from */
} GimpTile;
</pre>
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