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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>gimptile</title>
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<tr><td colspan="5" class="shortcuts"><nobr><a href="#id2562486" class="shortcut">Top</a>
 | 
<a href="#id2618678" class="shortcut">Description</a></nobr></td></tr>
</table>
<div class="refentry" lang="en">
<a name="libgimp-gimptile"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2>
<a name="id2562486"></a><span class="refentrytitle">gimptile</span>
</h2>
<p>gimptile — Functions for working with tiles.</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<pre class="synopsis">
<a href="libgimp-gimptile.html#GimpTile">GimpTile</a>;
void <a href="libgimp-gimptile.html#gimp-tile-ref">gimp_tile_ref</a> (<a href="libgimp-gimptile.html#GimpTile">GimpTile</a> *tile);
void <a href="libgimp-gimptile.html#gimp-tile-ref-zero">gimp_tile_ref_zero</a> (<a href="libgimp-gimptile.html#GimpTile">GimpTile</a> *tile);
void <a href="libgimp-gimptile.html#gimp-tile-unref">gimp_tile_unref</a> (<a href="libgimp-gimptile.html#GimpTile">GimpTile</a> *tile,
gboolean dirty);
void <a href="libgimp-gimptile.html#gimp-tile-flush">gimp_tile_flush</a> (<a href="libgimp-gimptile.html#GimpTile">GimpTile</a> *tile);
void <a href="libgimp-gimptile.html#gimp-tile-cache-size">gimp_tile_cache_size</a> (gulong kilobytes);
void <a href="libgimp-gimptile.html#gimp-tile-cache-ntiles">gimp_tile_cache_ntiles</a> (gulong ntiles);
</pre>
</div>
<div class="refsect1" lang="en">
<a name="id2618678"></a><h2>Description</h2>
<p>
Functions for working with tiles.
</p>
</div>
<div class="refsect1" lang="en">
<a name="id2618694"></a><h2>Details</h2>
<div class="refsect2" lang="en">
<a name="id2618704"></a><h3>
<a name="GimpTile"></a>GimpTile</h3>
<a class="indexterm" name="id2618716"></a><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>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2536610"></a><h3>
<a name="gimp-tile-ref"></a>gimp_tile_ref ()</h3>
<a class="indexterm" name="id2526878"></a><pre class="programlisting">void gimp_tile_ref (<a href="libgimp-gimptile.html#GimpTile">GimpTile</a> *tile);</pre>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td>
<span class="term"><em class="parameter"><code>tile</code></em> :</span></td>
<td>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2623849"></a><h3>
<a name="gimp-tile-ref-zero"></a>gimp_tile_ref_zero ()</h3>
<a class="indexterm" name="id2623860"></a><pre class="programlisting">void gimp_tile_ref_zero (<a href="libgimp-gimptile.html#GimpTile">GimpTile</a> *tile);</pre>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td>
<span class="term"><em class="parameter"><code>tile</code></em> :</span></td>
<td>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2623904"></a><h3>
<a name="gimp-tile-unref"></a>gimp_tile_unref ()</h3>
<a class="indexterm" name="id2623915"></a><pre class="programlisting">void gimp_tile_unref (<a href="libgimp-gimptile.html#GimpTile">GimpTile</a> *tile,
gboolean dirty);</pre>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>tile</code></em> :</span></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>dirty</code></em> :</span></td>
<td>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2623981"></a><h3>
<a name="gimp-tile-flush"></a>gimp_tile_flush ()</h3>
<a class="indexterm" name="id2623993"></a><pre class="programlisting">void gimp_tile_flush (<a href="libgimp-gimptile.html#GimpTile">GimpTile</a> *tile);</pre>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td>
<span class="term"><em class="parameter"><code>tile</code></em> :</span></td>
<td>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2623510"></a><h3>
<a name="gimp-tile-cache-size"></a>gimp_tile_cache_size ()</h3>
<a class="indexterm" name="id2623521"></a><pre class="programlisting">void gimp_tile_cache_size (gulong kilobytes);</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 href="libgimp-gimptile.html#gimp-tile-cache-ntiles"><code class="function">gimp_tile_cache_ntiles()</code></a>.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td>
<span class="term"><em class="parameter"><code>kilobytes</code></em> :</span></td>
<td> new cache size in kilobytes
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2623580"></a><h3>
<a name="gimp-tile-cache-ntiles"></a>gimp_tile_cache_ntiles ()</h3>
<a class="indexterm" name="id2623592"></a><pre class="programlisting">void gimp_tile_cache_ntiles (gulong ntiles);</pre>
<p>
Sets the size of the tile cache on the plug-in side. This function
is similar to <a href="libgimp-gimptile.html#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>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td>
<span class="term"><em class="parameter"><code>ntiles</code></em> :</span></td>
<td> number of tiles that should fit into the cache
</td>
</tr></tbody>
</table></div>
</div>
</div>
</div>
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