242 lines
9.9 KiB
HTML
242 lines
9.9 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<tr><td colspan="5" class="shortcuts"><nobr><a href="#id2612984" class="shortcut">Top</a>
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 | 
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<a href="#id2679251" class="shortcut">Description</a></nobr></td></tr>
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</table>
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<div class="refentry" lang="en">
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<a name="libgimp-gimptile"></a><div class="titlepage"></div>
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<div class="refnamediv"><table width="100%"><tr>
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<td valign="top">
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<h2>
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<a name="id2612984"></a><span class="refentrytitle">gimptile</span>
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</h2>
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<p>gimptile — Functions for working with tiles.</p>
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</td>
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<td valign="top" align="right"></td>
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</tr></table></div>
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<div class="refsynopsisdiv">
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<h2>Synopsis</h2>
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<pre class="synopsis">
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<a class="link" href="libgimp-gimptile.html#GimpTile">GimpTile</a>;
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void <a class="link" href="libgimp-gimptile.html#gimp-tile-ref">gimp_tile_ref</a> (<a class="link" href="libgimp-gimptile.html#GimpTile">GimpTile</a> *tile);
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void <a class="link" href="libgimp-gimptile.html#gimp-tile-ref-zero">gimp_tile_ref_zero</a> (<a class="link" href="libgimp-gimptile.html#GimpTile">GimpTile</a> *tile);
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void <a class="link" href="libgimp-gimptile.html#gimp-tile-unref">gimp_tile_unref</a> (<a class="link" href="libgimp-gimptile.html#GimpTile">GimpTile</a> *tile,
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<a
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href="../glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> dirty);
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void <a class="link" href="libgimp-gimptile.html#gimp-tile-flush">gimp_tile_flush</a> (<a class="link" href="libgimp-gimptile.html#GimpTile">GimpTile</a> *tile);
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void <a class="link" href="libgimp-gimptile.html#gimp-tile-cache-size">gimp_tile_cache_size</a> (<a
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href="../glib/glib-Basic-Types.html#gulong"
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>gulong</a> kilobytes);
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void <a class="link" href="libgimp-gimptile.html#gimp-tile-cache-ntiles">gimp_tile_cache_ntiles</a> (<a
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href="../glib/glib-Basic-Types.html#gulong"
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>gulong</a> ntiles);
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</pre>
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</div>
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<div class="refsect1" lang="en">
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<a name="id2679251"></a><h2>Description</h2>
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<p>
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Functions for working with tiles.
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</p>
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</div>
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<div class="refsect1" lang="en">
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<a name="id2679266"></a><h2>Details</h2>
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<div class="refsect2" lang="en">
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<a name="id2679277"></a><h3>
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<a name="GimpTile"></a>GimpTile</h3>
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<a class="indexterm" name="id2679289"></a><pre class="programlisting">typedef struct {
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guint ewidth; /* the effective width of the tile */
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guint eheight; /* the effective height of the tile */
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guint bpp; /* the bytes per pixel (1, 2, 3 or 4 ) */
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guint tile_num; /* the number of this tile within the drawable */
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guint16 ref_count; /* reference count for the tile */
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guint dirty : 1; /* is the tile dirty? has it been modified? */
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guint shadow: 1; /* is this a shadow tile */
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guchar *data; /* the pixel data for the tile */
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GimpDrawable *drawable; /* the drawable this tile came from */
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} GimpTile;
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</pre>
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<p>
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</p>
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</div>
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<hr>
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<div class="refsect2" lang="en">
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<a name="id2679314"></a><h3>
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<a name="gimp-tile-ref"></a>gimp_tile_ref ()</h3>
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<a class="indexterm" name="id2679326"></a><pre class="programlisting">void gimp_tile_ref (<a class="link" href="libgimp-gimptile.html#GimpTile">GimpTile</a> *tile);</pre>
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<p>
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</p>
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<div class="variablelist"><table border="0">
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<col align="left" valign="top">
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<tbody><tr>
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<td><p><span class="term"><em class="parameter"><code>tile</code></em> :</span></p></td>
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<td>
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</td>
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</tr></tbody>
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</table></div>
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</div>
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<hr>
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<div class="refsect2" lang="en">
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<a name="id2686691"></a><h3>
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<a name="gimp-tile-ref-zero"></a>gimp_tile_ref_zero ()</h3>
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<a class="indexterm" name="id2686702"></a><pre class="programlisting">void gimp_tile_ref_zero (<a class="link" href="libgimp-gimptile.html#GimpTile">GimpTile</a> *tile);</pre>
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<p>
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</p>
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<div class="variablelist"><table border="0">
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<col align="left" valign="top">
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<tbody><tr>
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<td><p><span class="term"><em class="parameter"><code>tile</code></em> :</span></p></td>
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<td>
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</td>
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</tr></tbody>
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</table></div>
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</div>
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<hr>
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<div class="refsect2" lang="en">
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<a name="id2686747"></a><h3>
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<a name="gimp-tile-unref"></a>gimp_tile_unref ()</h3>
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<a class="indexterm" name="id2686758"></a><pre class="programlisting">void gimp_tile_unref (<a class="link" href="libgimp-gimptile.html#GimpTile">GimpTile</a> *tile,
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<a
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href="../glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> dirty);</pre>
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<p>
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</p>
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<div class="variablelist"><table border="0">
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<col align="left" valign="top">
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<tbody>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>tile</code></em> :</span></p></td>
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<td>
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</td>
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</tr>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>dirty</code></em> :</span></p></td>
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<td>
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</td>
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</tr>
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</tbody>
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</table></div>
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</div>
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<hr>
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<div class="refsect2" lang="en">
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<a name="id2686825"></a><h3>
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<a name="gimp-tile-flush"></a>gimp_tile_flush ()</h3>
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<a class="indexterm" name="id2686836"></a><pre class="programlisting">void gimp_tile_flush (<a class="link" href="libgimp-gimptile.html#GimpTile">GimpTile</a> *tile);</pre>
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<p>
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</p>
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<div class="variablelist"><table border="0">
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<col align="left" valign="top">
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<tbody><tr>
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<td><p><span class="term"><em class="parameter"><code>tile</code></em> :</span></p></td>
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<td>
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</td>
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</tr></tbody>
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</table></div>
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</div>
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<hr>
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<div class="refsect2" lang="en">
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<a name="id2686882"></a><h3>
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<a name="gimp-tile-cache-size"></a>gimp_tile_cache_size ()</h3>
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<a class="indexterm" name="id2686893"></a><pre class="programlisting">void gimp_tile_cache_size (<a
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href="../glib/glib-Basic-Types.html#gulong"
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>gulong</a> kilobytes);</pre>
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<p>
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Sets the size of the tile cache on the plug-in side. The tile cache
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is used to reduce the number of tiles exchanged between the GIMP core
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and the plug-in. See also <a class="link" href="libgimp-gimptile.html#gimp-tile-cache-ntiles"><code class="function">gimp_tile_cache_ntiles()</code></a>.</p>
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<p>
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</p>
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<div class="variablelist"><table border="0">
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<col align="left" valign="top">
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<tbody><tr>
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<td><p><span class="term"><em class="parameter"><code>kilobytes</code></em> :</span></p></td>
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<td> new cache size in kilobytes
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</td>
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</tr></tbody>
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</table></div>
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</div>
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<hr>
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<div class="refsect2" lang="en">
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<a name="id2685675"></a><h3>
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<a name="gimp-tile-cache-ntiles"></a>gimp_tile_cache_ntiles ()</h3>
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<a class="indexterm" name="id2685686"></a><pre class="programlisting">void gimp_tile_cache_ntiles (<a
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href="../glib/glib-Basic-Types.html#gulong"
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>gulong</a> ntiles);</pre>
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<p>
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Sets the size of the tile cache on the plug-in side. This function
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is similar to <a class="link" href="libgimp-gimptile.html#gimp-tile-cache-size"><code class="function">gimp_tile_cache_size()</code></a> but allows to specify the
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number of tiles directly.
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</p>
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<p>
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If your plug-in access pixels tile-by-tile, it doesn't need a tile
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cache at all. If however the plug-in accesses drawable pixel data
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row-by-row, it should set the tile cache large enough to hold the
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number of tiles per row. Double this size if your plug-in uses
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shadow tiles.</p>
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<p>
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</p>
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<div class="variablelist"><table border="0">
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<col align="left" valign="top">
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<tbody><tr>
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<td><p><span class="term"><em class="parameter"><code>ntiles</code></em> :</span></p></td>
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<td> number of tiles that should fit into the cache
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</td>
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</tr></tbody>
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</table></div>
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</div>
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</div>
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</body>
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