497 lines
21 KiB
HTML
497 lines
21 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>gimpthumb-utils</title>
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<tr><td colspan="5" class="shortcuts"><nobr><a href="#id2593898" class="shortcut">Top</a>
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 | 
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<a href="#id2581316" 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="libgimpthumb-gimpthumb-utils"></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="id2593898"></a><span class="refentrytitle">gimpthumb-utils</span>
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</h2>
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<p>gimpthumb-utils — Utility functions provided and used by libgimpthumb</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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gboolean <a href="libgimpthumb-gimpthumb-utils.html#gimp-thumb-init">gimp_thumb_init</a> (const gchar *creator,
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const gchar *thumb_basedir);
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gchar* <a href="libgimpthumb-gimpthumb-utils.html#gimp-thumb-find-thumb">gimp_thumb_find_thumb</a> (const gchar *uri,
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<a href="libgimpthumb-gimpthumb-enums.html#GimpThumbSize">GimpThumbSize</a> *size);
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<a href="libgimpthumb-gimpthumb-enums.html#GimpThumbFileType">GimpThumbFileType</a> <a href="libgimpthumb-gimpthumb-utils.html#gimp-thumb-file-test">gimp_thumb_file_test</a> (const gchar *filename,
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gint64 *mtime,
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gint64 *size,
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gint *err_no);
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gchar* <a href="libgimpthumb-gimpthumb-utils.html#gimp-thumb-name-from-uri">gimp_thumb_name_from_uri</a> (const gchar *uri,
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<a href="libgimpthumb-gimpthumb-enums.html#GimpThumbSize">GimpThumbSize</a> size);
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gboolean <a href="libgimpthumb-gimpthumb-utils.html#gimp-thumb-ensure-thumb-dir">gimp_thumb_ensure_thumb_dir</a> (<a href="libgimpthumb-gimpthumb-enums.html#GimpThumbSize">GimpThumbSize</a> size,
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GError **error);
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const gchar* <a href="libgimpthumb-gimpthumb-utils.html#gimp-thumb-get-thumb-dir">gimp_thumb_get_thumb_dir</a> (<a href="libgimpthumb-gimpthumb-enums.html#GimpThumbSize">GimpThumbSize</a> size);
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void <a href="libgimpthumb-gimpthumb-utils.html#gimp-thumbs-delete-for-uri">gimp_thumbs_delete_for_uri</a> (const gchar *uri);
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gchar* <a href="libgimpthumb-gimpthumb-utils.html#gimp-thumb-name-from-uri-local">gimp_thumb_name_from_uri_local</a> (const gchar *uri,
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<a href="libgimpthumb-gimpthumb-enums.html#GimpThumbSize">GimpThumbSize</a> size);
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gboolean <a href="libgimpthumb-gimpthumb-utils.html#gimp-thumb-ensure-thumb-dir-local">gimp_thumb_ensure_thumb_dir_local</a> (const gchar *dirname,
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<a href="libgimpthumb-gimpthumb-enums.html#GimpThumbSize">GimpThumbSize</a> size,
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GError **error);
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gchar* <a href="libgimpthumb-gimpthumb-utils.html#gimp-thumb-get-thumb-dir-local">gimp_thumb_get_thumb_dir_local</a> (const gchar *dirname,
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<a href="libgimpthumb-gimpthumb-enums.html#GimpThumbSize">GimpThumbSize</a> size);
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void <a href="libgimpthumb-gimpthumb-utils.html#gimp-thumbs-delete-for-uri-local">gimp_thumbs_delete_for_uri_local</a> (const gchar *uri);
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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="id2581316"></a><h2>Description</h2>
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<p>
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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="id2581332"></a><h2>Details</h2>
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<div class="refsect2" lang="en">
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<a name="id2581342"></a><h3>
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<a name="gimp-thumb-init"></a>gimp_thumb_init ()</h3>
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<a class="indexterm" name="id2581355"></a><pre class="programlisting">gboolean gimp_thumb_init (const gchar *creator,
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const gchar *thumb_basedir);</pre>
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<p>
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This function initializes the thumbnail system. It must be called
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before any other functions from libgimpthumb are used. You may call
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it more than once if you want to change the <em class="parameter"><code>thumb_basedir</code></em> but if
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you do that, you should make sure that no thread is still using the
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library. Apart from this function, libgimpthumb is multi-thread
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safe.
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</p>
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<p>
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The <em class="parameter"><code>creator</code></em> string must be 7bit ASCII and should contain the name
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of the software that creates the thumbnails. It is used to handle
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thumbnail creation failures. See the spec for more details.
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</p>
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<p>
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Usually you will pass <code class="literal">NULL</code> for <em class="parameter"><code>thumb_basedir</code></em>. Thumbnails will
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then be stored in the user's personal thumbnail directory as
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defined in the spec. If you wish to use libgimpthumb to store
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application-specific thumbnails, you can specify a different base
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directory here.</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>
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<tr>
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<td><span class="term"><em class="parameter"><code>creator</code></em> :</span></td>
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<td> an ASCII string that identifies the thumbnail creator
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</td>
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</tr>
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<tr>
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<td><span class="term"><em class="parameter"><code>thumb_basedir</code></em> :</span></td>
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<td> an absolute path or <code class="literal">NULL</code> to use the default
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</td>
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</tr>
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<tr>
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<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
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<td> <code class="literal">TRUE</code> if the library was successfully initialized.
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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="id2577360"></a><h3>
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<a name="gimp-thumb-find-thumb"></a>gimp_thumb_find_thumb ()</h3>
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<a class="indexterm" name="id2577371"></a><pre class="programlisting">gchar* gimp_thumb_find_thumb (const gchar *uri,
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<a href="libgimpthumb-gimpthumb-enums.html#GimpThumbSize">GimpThumbSize</a> *size);</pre>
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<p>
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This function attempts to locate a thumbnail for the given
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<em class="parameter"><code>uri</code></em>. First it tries the size that is stored at <em class="parameter"><code>size</code></em>. If no
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thumbnail of that size is found, it will look for a larger
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thumbnail, then falling back to a smaller size.
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</p>
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<p>
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If the user's thumbnail repository doesn't provide a thumbnail but
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a local thumbnail repository exists for the folder the image is
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located in, the same search is done among the local thumbnails (if
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there are any).
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</p>
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<p>
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If a thumbnail is found, it's size is written to the variable
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pointer to by <em class="parameter"><code>size</code></em> and the file location is returned.</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>
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<tr>
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<td><span class="term"><em class="parameter"><code>uri</code></em> :</span></td>
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<td> an escaped URI
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</td>
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</tr>
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<tr>
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<td><span class="term"><em class="parameter"><code>size</code></em> :</span></td>
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<td> pointer to a <a href="libgimpthumb-gimpthumb-enums.html#GimpThumbSize"><span class="type">GimpThumbSize</span></a>
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</td>
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</tr>
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<tr>
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<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
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<td> a newly allocated string in the encoding of the
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filesystem or <code class="literal">NULL</code> if no thumbnail for <em class="parameter"><code>uri</code></em> was found
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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="id2566923"></a><h3>
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<a name="gimp-thumb-file-test"></a>gimp_thumb_file_test ()</h3>
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<a class="indexterm" name="id2566934"></a><pre class="programlisting"><a href="libgimpthumb-gimpthumb-enums.html#GimpThumbFileType">GimpThumbFileType</a> gimp_thumb_file_test (const gchar *filename,
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gint64 *mtime,
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gint64 *size,
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gint *err_no);</pre>
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<p>
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This is a convenience and portability wrapper around <code class="function">stat()</code>. It
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checks if the given <em class="parameter"><code>filename</code></em> exists and returns modification time
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and file size in 64bit integer values.</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>
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<tr>
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<td><span class="term"><em class="parameter"><code>filename</code></em> :</span></td>
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<td> a filename in the encoding of the filesystem
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</td>
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</tr>
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<tr>
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<td><span class="term"><em class="parameter"><code>mtime</code></em> :</span></td>
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<td> return location for modification time
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</td>
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</tr>
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<tr>
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<td><span class="term"><em class="parameter"><code>size</code></em> :</span></td>
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<td> return location for file size
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</td>
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</tr>
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<tr>
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<td><span class="term"><em class="parameter"><code>err_no</code></em> :</span></td>
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<td> return location for system "errno"
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</td>
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</tr>
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<tr>
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<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
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<td> The type of the file, or <a href="libgimpthumb-gimpthumb-enums.html#GIMP-THUMB-FILE-TYPE-NONE:CAPS"><span class="type">GIMP_THUMB_FILE_TYPE_NONE</span></a> if
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the file doesn't exist.
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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="id2567082"></a><h3>
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<a name="gimp-thumb-name-from-uri"></a>gimp_thumb_name_from_uri ()</h3>
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<a class="indexterm" name="id2567093"></a><pre class="programlisting">gchar* gimp_thumb_name_from_uri (const gchar *uri,
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<a href="libgimpthumb-gimpthumb-enums.html#GimpThumbSize">GimpThumbSize</a> size);</pre>
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<p>
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Creates the name of the thumbnail file of the specified <em class="parameter"><code>size</code></em> that
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belongs to an image file located at the given <em class="parameter"><code>uri</code></em>.</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>
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<tr>
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<td><span class="term"><em class="parameter"><code>uri</code></em> :</span></td>
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<td> an escaped URI
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</td>
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</tr>
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<tr>
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<td><span class="term"><em class="parameter"><code>size</code></em> :</span></td>
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<td> a <a href="libgimpthumb-gimpthumb-enums.html#GimpThumbSize"><span class="type">GimpThumbSize</span></a>
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</td>
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</tr>
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<tr>
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<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
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<td> a newly allocated filename in the encoding of the
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filesystem or <code class="literal">NULL</code> if <em class="parameter"><code>uri</code></em> points to the user's
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thumbnail repository.
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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="id2561093"></a><h3>
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<a name="gimp-thumb-ensure-thumb-dir"></a>gimp_thumb_ensure_thumb_dir ()</h3>
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<a class="indexterm" name="id2561105"></a><pre class="programlisting">gboolean gimp_thumb_ensure_thumb_dir (<a href="libgimpthumb-gimpthumb-enums.html#GimpThumbSize">GimpThumbSize</a> size,
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GError **error);</pre>
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<p>
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This function checks if the directory that is required to store
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thumbnails for a particular <em class="parameter"><code>size</code></em> exist and attempts to create it
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if necessary.
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</p>
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<p>
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You shouldn't have to call this function directly since
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<a href="GimpThumbnail.html#gimp-thumbnail-save-thumb"><code class="function">gimp_thumbnail_save_thumb()</code></a> and <a href="GimpThumbnail.html#gimp-thumbnail-save-failure"><code class="function">gimp_thumbnail_save_failure()</code></a> will
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do this for you.</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>
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<tr>
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<td><span class="term"><em class="parameter"><code>size</code></em> :</span></td>
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<td> a GimpThumbSize
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</td>
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</tr>
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<tr>
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<td><span class="term"><em class="parameter"><code>error</code></em> :</span></td>
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<td> return location for possible errors
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</td>
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</tr>
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<tr>
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<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
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<td> <code class="literal">TRUE</code> is the directory exists, <code class="literal">FALSE</code> if it could not
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be created
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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="id2561236"></a><h3>
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<a name="gimp-thumb-get-thumb-dir"></a>gimp_thumb_get_thumb_dir ()</h3>
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<a class="indexterm" name="id2561248"></a><pre class="programlisting">const gchar* gimp_thumb_get_thumb_dir (<a href="libgimpthumb-gimpthumb-enums.html#GimpThumbSize">GimpThumbSize</a> size);</pre>
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<p>
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Retrieve the name of the thumbnail folder for a specific size. The
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returned pointer will become invalid if <a href="libgimpthumb-gimpthumb-utils.html#gimp-thumb-init"><code class="function">gimp_thumb_init()</code></a> is used
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again. It must not be changed or freed.</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>
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<tr>
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<td><span class="term"><em class="parameter"><code>size</code></em> :</span></td>
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<td> a GimpThumbSize
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</td>
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</tr>
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<tr>
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<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
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<td> the thumbnail directory in the encoding of the filesystem
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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="id2561322"></a><h3>
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<a name="gimp-thumbs-delete-for-uri"></a>gimp_thumbs_delete_for_uri ()</h3>
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<a class="indexterm" name="id2561336"></a><pre class="programlisting">void gimp_thumbs_delete_for_uri (const gchar *uri);</pre>
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<p>
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Deletes all thumbnails for the image file specified by <em class="parameter"><code>uri</code></em> from the
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user's thumbnail repository.</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><span class="term"><em class="parameter"><code>uri</code></em> :</span></td>
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<td> an escaped URI
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</td>
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</tr></tbody>
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</table></div>
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<p class="since">Since GIMP 2.2
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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="id2601719"></a><h3>
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<a name="gimp-thumb-name-from-uri-local"></a>gimp_thumb_name_from_uri_local ()</h3>
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<a class="indexterm" name="id2601733"></a><pre class="programlisting">gchar* gimp_thumb_name_from_uri_local (const gchar *uri,
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<a href="libgimpthumb-gimpthumb-enums.html#GimpThumbSize">GimpThumbSize</a> size);</pre>
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<p>
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Creates the name of a local thumbnail file of the specified <em class="parameter"><code>size</code></em>
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that belongs to an image file located at the given <em class="parameter"><code>uri</code></em>. Local
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thumbnails have been introduced with version 0.7 of the spec.</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>
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<tr>
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<td><span class="term"><em class="parameter"><code>uri</code></em> :</span></td>
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<td> an escaped URI
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</td>
|
|
</tr>
|
|
<tr>
|
|
<td><span class="term"><em class="parameter"><code>size</code></em> :</span></td>
|
|
<td> a <a href="libgimpthumb-gimpthumb-enums.html#GimpThumbSize"><span class="type">GimpThumbSize</span></a>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
|
|
<td> a newly allocated filename in the encoding of the
|
|
filesystem or <code class="literal">NULL</code> if <em class="parameter"><code>uri</code></em> is a remote file or
|
|
points to the user's thumbnail repository.
|
|
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table></div>
|
|
<p class="since">Since GIMP 2.2
|
|
</p>
|
|
</div>
|
|
<hr>
|
|
<div class="refsect2" lang="en">
|
|
<a name="id2601850"></a><h3>
|
|
<a name="gimp-thumb-ensure-thumb-dir-local"></a>gimp_thumb_ensure_thumb_dir_local ()</h3>
|
|
<a class="indexterm" name="id2601866"></a><pre class="programlisting">gboolean gimp_thumb_ensure_thumb_dir_local (const gchar *dirname,
|
|
<a href="libgimpthumb-gimpthumb-enums.html#GimpThumbSize">GimpThumbSize</a> size,
|
|
GError **error);</pre>
|
|
<p>
|
|
This function checks if the directory that is required to store
|
|
local thumbnails for a particular <em class="parameter"><code>size</code></em> exist and attempts to
|
|
create it if necessary.
|
|
</p>
|
|
<p>
|
|
You shouldn't have to call this function directly since
|
|
<a href="GimpThumbnail.html#gimp-thumbnail-save-thumb-local"><code class="function">gimp_thumbnail_save_thumb_local()</code></a> will do this for you.</p>
|
|
<p>
|
|
|
|
</p>
|
|
<div class="variablelist"><table border="0">
|
|
<col align="left" valign="top">
|
|
<tbody>
|
|
<tr>
|
|
<td><span class="term"><em class="parameter"><code>dirname</code></em> :</span></td>
|
|
<td>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><span class="term"><em class="parameter"><code>size</code></em> :</span></td>
|
|
<td> a GimpThumbSize
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><span class="term"><em class="parameter"><code>error</code></em> :</span></td>
|
|
<td> return location for possible errors
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
|
|
<td> <code class="literal">TRUE</code> is the directory exists, <code class="literal">FALSE</code> if it could not
|
|
be created
|
|
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table></div>
|
|
<p class="since">Since GIMP 2.2
|
|
</p>
|
|
</div>
|
|
<hr>
|
|
<div class="refsect2" lang="en">
|
|
<a name="id2602018"></a><h3>
|
|
<a name="gimp-thumb-get-thumb-dir-local"></a>gimp_thumb_get_thumb_dir_local ()</h3>
|
|
<a class="indexterm" name="id2602034"></a><pre class="programlisting">gchar* gimp_thumb_get_thumb_dir_local (const gchar *dirname,
|
|
<a href="libgimpthumb-gimpthumb-enums.html#GimpThumbSize">GimpThumbSize</a> size);</pre>
|
|
<p>
|
|
Retrieve the name of the local thumbnail folder for a specific
|
|
size. Unlike <a href="libgimpthumb-gimpthumb-utils.html#gimp-thumb-get-thumb-dir"><code class="function">gimp_thumb_get_thumb_dir()</code></a> the returned string is not
|
|
constant and should be free'd when it is not any longer needed.</p>
|
|
<p>
|
|
|
|
</p>
|
|
<div class="variablelist"><table border="0">
|
|
<col align="left" valign="top">
|
|
<tbody>
|
|
<tr>
|
|
<td><span class="term"><em class="parameter"><code>dirname</code></em> :</span></td>
|
|
<td>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><span class="term"><em class="parameter"><code>size</code></em> :</span></td>
|
|
<td> a GimpThumbSize
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
|
|
<td> the thumbnail directory in the encoding of the filesystem
|
|
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table></div>
|
|
<p class="since">Since GIMP 2.2
|
|
</p>
|
|
</div>
|
|
<hr>
|
|
<div class="refsect2" lang="en">
|
|
<a name="id2602136"></a><h3>
|
|
<a name="gimp-thumbs-delete-for-uri-local"></a>gimp_thumbs_delete_for_uri_local ()</h3>
|
|
<a class="indexterm" name="id2602151"></a><pre class="programlisting">void gimp_thumbs_delete_for_uri_local (const gchar *uri);</pre>
|
|
<p>
|
|
Deletes all thumbnails for the image file specified by <em class="parameter"><code>uri</code></em> from
|
|
the local thumbnail repository.</p>
|
|
<p>
|
|
|
|
</p>
|
|
<div class="variablelist"><table border="0">
|
|
<col align="left" valign="top">
|
|
<tbody><tr>
|
|
<td><span class="term"><em class="parameter"><code>uri</code></em> :</span></td>
|
|
<td> an escaped URI
|
|
</td>
|
|
</tr></tbody>
|
|
</table></div>
|
|
<p class="since">Since GIMP 2.2
|
|
</p>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html>
|