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<refentry id="libgnomeui-GnomeThumbnail">
<refmeta>
<refentrytitle role="top_of_page">GnomeThumbnail</refentrytitle>
<manvolnum>3</manvolnum>
<refmiscinfo>LIBGNOMEUI Library</refmiscinfo>
</refmeta>
<refnamediv>
<refname>GnomeThumbnail</refname>
<refpurpose></refpurpose>
<!--[<xref linkend="desc" endterm="desc.title"/>]-->
</refnamediv>
<refsynopsisdiv role="synopsis">
<title role="synopsis.title">Synopsis</title>
<synopsis>
#include <libgnomeui/libgnomeui.h>
<link linkend="GnomeThumbnailFactory">GnomeThumbnailFactory</link>;
enum <link linkend="GnomeThumbnailSize">GnomeThumbnailSize</link>;
<link linkend="GnomeThumbnailFactoryClass">GnomeThumbnailFactoryClass</link>;
<link linkend="GnomeThumbnailFactory">GnomeThumbnailFactory</link>* <link linkend="gnome-thumbnail-factory-new">gnome_thumbnail_factory_new</link> (<link linkend="GnomeThumbnailSize">GnomeThumbnailSize</link> size);
<link linkend="char">char</link>* <link linkend="gnome-thumbnail-factory-lookup">gnome_thumbnail_factory_lookup</link> (<link linkend="GnomeThumbnailFactory">GnomeThumbnailFactory</link> *factory,
const <link linkend="char">char</link> *uri,
<link linkend="time-t">time_t</link> mtime);
<link linkend="gboolean">gboolean</link> <link linkend="gnome-thumbnail-factory-has-valid-failed-thumbnail">gnome_thumbnail_factory_has_valid_failed_thumbnail</link>
(<link linkend="GnomeThumbnailFactory">GnomeThumbnailFactory</link> *factory,
const <link linkend="char">char</link> *uri,
<link linkend="time-t">time_t</link> mtime);
<link linkend="gboolean">gboolean</link> <link linkend="gnome-thumbnail-factory-can-thumbnail">gnome_thumbnail_factory_can_thumbnail</link>
(<link linkend="GnomeThumbnailFactory">GnomeThumbnailFactory</link> *factory,
const <link linkend="char">char</link> *uri,
const <link linkend="char">char</link> *mime_type,
<link linkend="time-t">time_t</link> mtime);
<link linkend="GdkPixbuf">GdkPixbuf</link>* <link linkend="gnome-thumbnail-factory-generate-thumbnail">gnome_thumbnail_factory_generate_thumbnail</link>
(<link linkend="GnomeThumbnailFactory">GnomeThumbnailFactory</link> *factory,
const <link linkend="char">char</link> *uri,
const <link linkend="char">char</link> *mime_type);
<link linkend="void">void</link> <link linkend="gnome-thumbnail-factory-save-thumbnail">gnome_thumbnail_factory_save_thumbnail</link>
(<link linkend="GnomeThumbnailFactory">GnomeThumbnailFactory</link> *factory,
<link linkend="GdkPixbuf">GdkPixbuf</link> *thumbnail,
const <link linkend="char">char</link> *uri,
<link linkend="time-t">time_t</link> original_mtime);
<link linkend="void">void</link> <link linkend="gnome-thumbnail-factory-create-failed-thumbnail">gnome_thumbnail_factory_create_failed_thumbnail</link>
(<link linkend="GnomeThumbnailFactory">GnomeThumbnailFactory</link> *factory,
const <link linkend="char">char</link> *uri,
<link linkend="time-t">time_t</link> mtime);
<link linkend="GdkPixbuf">GdkPixbuf</link>* <link linkend="gnome-thumbnail-scale-down-pixbuf">gnome_thumbnail_scale_down_pixbuf</link> (<link linkend="GdkPixbuf">GdkPixbuf</link> *pixbuf,
<link linkend="int">int</link> dest_width,
<link linkend="int">int</link> dest_height);
<link linkend="gboolean">gboolean</link> <link linkend="gnome-thumbnail-has-uri">gnome_thumbnail_has_uri</link> (<link linkend="GdkPixbuf">GdkPixbuf</link> *pixbuf,
const <link linkend="char">char</link> *uri);
<link linkend="gboolean">gboolean</link> <link linkend="gnome-thumbnail-is-valid">gnome_thumbnail_is_valid</link> (<link linkend="GdkPixbuf">GdkPixbuf</link> *pixbuf,
const <link linkend="char">char</link> *uri,
<link linkend="time-t">time_t</link> mtime);
<link linkend="char">char</link>* <link linkend="gnome-thumbnail-md5">gnome_thumbnail_md5</link> (const <link linkend="char">char</link> *uri);
<link linkend="char">char</link>* <link linkend="gnome-thumbnail-path-for-uri">gnome_thumbnail_path_for_uri</link> (const <link linkend="char">char</link> *uri,
<link linkend="GnomeThumbnailSize">GnomeThumbnailSize</link> size);
</synopsis>
</refsynopsisdiv>
<refsect1 role="desc">
<title role="desc.title">Description</title>
<para>
</para>
</refsect1>
<refsect1 role="details">
<title role="details.title">Details</title>
<refsect2>
<title><anchor id="GnomeThumbnailFactory" role="struct"/>GnomeThumbnailFactory</title>
<indexterm><primary>GnomeThumbnailFactory</primary></indexterm><programlisting>typedef struct {
GObject parent;
GnomeThumbnailFactoryPrivate *priv;
} GnomeThumbnailFactory;
</programlisting>
<para>
</para></refsect2>
<refsect2>
<title><anchor id="GnomeThumbnailSize" role="enum"/>enum GnomeThumbnailSize</title>
<indexterm><primary>GnomeThumbnailSize</primary></indexterm><programlisting>typedef enum {
GNOME_THUMBNAIL_SIZE_NORMAL,
GNOME_THUMBNAIL_SIZE_LARGE
} GnomeThumbnailSize;
</programlisting>
<para>
</para></refsect2>
<refsect2>
<title><anchor id="GnomeThumbnailFactoryClass" role="struct"/>GnomeThumbnailFactoryClass</title>
<indexterm><primary>GnomeThumbnailFactoryClass</primary></indexterm><programlisting>typedef struct {
GObjectClass parent;
} GnomeThumbnailFactoryClass;
</programlisting>
<para>
</para></refsect2>
<refsect2>
<title><anchor id="gnome-thumbnail-factory-new" role="function" condition="since:2.2"/>gnome_thumbnail_factory_new ()</title>
<indexterm role="2.2"><primary>gnome_thumbnail_factory_new</primary></indexterm><programlisting><link linkend="GnomeThumbnailFactory">GnomeThumbnailFactory</link>* gnome_thumbnail_factory_new (<link linkend="GnomeThumbnailSize">GnomeThumbnailSize</link> size);</programlisting>
<para>
Creates a new <link linkend="GnomeThumbnailFactory"><type>GnomeThumbnailFactory</type></link>.
</para>
<para>
This function must be called on the main thread.</para>
<para>
</para><variablelist role="params">
<varlistentry><term><parameter>size</parameter> :</term>
<listitem><simpara> The thumbnail size to use
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis> :</term><listitem><simpara> a new <link linkend="GnomeThumbnailFactory"><type>GnomeThumbnailFactory</type></link>
</simpara></listitem></varlistentry>
</variablelist><para role="since">Since 2.2
</para></refsect2>
<refsect2>
<title><anchor id="gnome-thumbnail-factory-lookup" role="function" condition="since:2.2"/>gnome_thumbnail_factory_lookup ()</title>
<indexterm role="2.2"><primary>gnome_thumbnail_factory_lookup</primary></indexterm><programlisting><link linkend="char">char</link>* gnome_thumbnail_factory_lookup (<link linkend="GnomeThumbnailFactory">GnomeThumbnailFactory</link> *factory,
const <link linkend="char">char</link> *uri,
<link linkend="time-t">time_t</link> mtime);</programlisting>
<para>
Tries to locate an existing thumbnail for the file specified.
</para>
<para>
Usage of this function is threadsafe.</para>
<para>
</para><variablelist role="params">
<varlistentry><term><parameter>factory</parameter> :</term>
<listitem><simpara> a <link linkend="GnomeThumbnailFactory"><type>GnomeThumbnailFactory</type></link>
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>uri</parameter> :</term>
<listitem><simpara> the uri of a file
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>mtime</parameter> :</term>
<listitem><simpara> the mtime of the file
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis> :</term><listitem><simpara> The absolute path of the thumbnail, or <link linkend="NULL:CAPS"><literal>NULL</literal></link> if none exist.
</simpara></listitem></varlistentry>
</variablelist><para role="since">Since 2.2
</para></refsect2>
<refsect2>
<title><anchor id="gnome-thumbnail-factory-has-valid-failed-thumbnail" role="function" condition="since:2.2"/>gnome_thumbnail_factory_has_valid_failed_thumbnail ()</title>
<indexterm role="2.2"><primary>gnome_thumbnail_factory_has_valid_failed_thumbnail</primary></indexterm><programlisting><link linkend="gboolean">gboolean</link> gnome_thumbnail_factory_has_valid_failed_thumbnail
(<link linkend="GnomeThumbnailFactory">GnomeThumbnailFactory</link> *factory,
const <link linkend="char">char</link> *uri,
<link linkend="time-t">time_t</link> mtime);</programlisting>
<para>
Tries to locate an failed thumbnail for the file specified. Writing
and looking for failed thumbnails is important to avoid to try to
thumbnail e.g. broken images several times.
</para>
<para>
Usage of this function is threadsafe.</para>
<para>
</para><variablelist role="params">
<varlistentry><term><parameter>factory</parameter> :</term>
<listitem><simpara> a <link linkend="GnomeThumbnailFactory"><type>GnomeThumbnailFactory</type></link>
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>uri</parameter> :</term>
<listitem><simpara> the uri of a file
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>mtime</parameter> :</term>
<listitem><simpara> the mtime of the file
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis> :</term><listitem><simpara> TRUE if there is a failed thumbnail for the file.
</simpara></listitem></varlistentry>
</variablelist><para role="since">Since 2.2
</para></refsect2>
<refsect2>
<title><anchor id="gnome-thumbnail-factory-can-thumbnail" role="function" condition="since:2.2"/>gnome_thumbnail_factory_can_thumbnail ()</title>
<indexterm role="2.2"><primary>gnome_thumbnail_factory_can_thumbnail</primary></indexterm><programlisting><link linkend="gboolean">gboolean</link> gnome_thumbnail_factory_can_thumbnail
(<link linkend="GnomeThumbnailFactory">GnomeThumbnailFactory</link> *factory,
const <link linkend="char">char</link> *uri,
const <link linkend="char">char</link> *mime_type,
<link linkend="time-t">time_t</link> mtime);</programlisting>
<para>
Returns TRUE if this GnomeIconFactory can (at least try) to thumbnail
this file. Thumbnails or files with failed thumbnails won't be thumbnailed.
</para>
<para>
Usage of this function is threadsafe.</para>
<para>
</para><variablelist role="params">
<varlistentry><term><parameter>factory</parameter> :</term>
<listitem><simpara> a <link linkend="GnomeThumbnailFactory"><type>GnomeThumbnailFactory</type></link>
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>uri</parameter> :</term>
<listitem><simpara> the uri of a file
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>mime_type</parameter> :</term>
<listitem><simpara> the mime type of the file
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>mtime</parameter> :</term>
<listitem><simpara> the mtime of the file
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis> :</term><listitem><simpara> TRUE if the file can be thumbnailed.
</simpara></listitem></varlistentry>
</variablelist><para role="since">Since 2.2
</para></refsect2>
<refsect2>
<title><anchor id="gnome-thumbnail-factory-generate-thumbnail" role="function" condition="since:2.2"/>gnome_thumbnail_factory_generate_thumbnail ()</title>
<indexterm role="2.2"><primary>gnome_thumbnail_factory_generate_thumbnail</primary></indexterm><programlisting><link linkend="GdkPixbuf">GdkPixbuf</link>* gnome_thumbnail_factory_generate_thumbnail
(<link linkend="GnomeThumbnailFactory">GnomeThumbnailFactory</link> *factory,
const <link linkend="char">char</link> *uri,
const <link linkend="char">char</link> *mime_type);</programlisting>
<para>
Tries to generate a thumbnail for the specified file. If it succeeds
it returns a pixbuf that can be used as a thumbnail.
</para>
<para>
Usage of this function is threadsafe.</para>
<para>
</para><variablelist role="params">
<varlistentry><term><parameter>factory</parameter> :</term>
<listitem><simpara> a <link linkend="GnomeThumbnailFactory"><type>GnomeThumbnailFactory</type></link>
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>uri</parameter> :</term>
<listitem><simpara> the uri of a file
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>mime_type</parameter> :</term>
<listitem><simpara> the mime type of the file
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis> :</term><listitem><simpara> thumbnail pixbuf if thumbnailing succeeded, <link linkend="NULL:CAPS"><literal>NULL</literal></link> otherwise.
</simpara></listitem></varlistentry>
</variablelist><para role="since">Since 2.2
</para></refsect2>
<refsect2>
<title><anchor id="gnome-thumbnail-factory-save-thumbnail" role="function" condition="since:2.2"/>gnome_thumbnail_factory_save_thumbnail ()</title>
<indexterm role="2.2"><primary>gnome_thumbnail_factory_save_thumbnail</primary></indexterm><programlisting><link linkend="void">void</link> gnome_thumbnail_factory_save_thumbnail
(<link linkend="GnomeThumbnailFactory">GnomeThumbnailFactory</link> *factory,
<link linkend="GdkPixbuf">GdkPixbuf</link> *thumbnail,
const <link linkend="char">char</link> *uri,
<link linkend="time-t">time_t</link> original_mtime);</programlisting>
<para>
Saves <parameter>thumbnail</parameter> at the right place. If the save fails a
failed thumbnail is written.
</para>
<para>
Usage of this function is threadsafe.</para>
<para>
</para><variablelist role="params">
<varlistentry><term><parameter>factory</parameter> :</term>
<listitem><simpara> a <link linkend="GnomeThumbnailFactory"><type>GnomeThumbnailFactory</type></link>
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>thumbnail</parameter> :</term>
<listitem><simpara> the thumbnail as a pixbuf
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>uri</parameter> :</term>
<listitem><simpara> the uri of a file
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>original_mtime</parameter> :</term>
<listitem><simpara> the modification time of the original file
</simpara></listitem></varlistentry>
</variablelist><para role="since">Since 2.2
</para></refsect2>
<refsect2>
<title><anchor id="gnome-thumbnail-factory-create-failed-thumbnail" role="function" condition="since:2.2"/>gnome_thumbnail_factory_create_failed_thumbnail ()</title>
<indexterm role="2.2"><primary>gnome_thumbnail_factory_create_failed_thumbnail</primary></indexterm><programlisting><link linkend="void">void</link> gnome_thumbnail_factory_create_failed_thumbnail
(<link linkend="GnomeThumbnailFactory">GnomeThumbnailFactory</link> *factory,
const <link linkend="char">char</link> *uri,
<link linkend="time-t">time_t</link> mtime);</programlisting>
<para>
Creates a failed thumbnail for the file so that we don't try
to re-thumbnail the file later.
</para>
<para>
Usage of this function is threadsafe.</para>
<para>
</para><variablelist role="params">
<varlistentry><term><parameter>factory</parameter> :</term>
<listitem><simpara> a <link linkend="GnomeThumbnailFactory"><type>GnomeThumbnailFactory</type></link>
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>uri</parameter> :</term>
<listitem><simpara> the uri of a file
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>mtime</parameter> :</term>
<listitem><simpara> the modification time of the file
</simpara></listitem></varlistentry>
</variablelist><para role="since">Since 2.2
</para></refsect2>
<refsect2>
<title><anchor id="gnome-thumbnail-scale-down-pixbuf" role="function" condition="since:2.2"/>gnome_thumbnail_scale_down_pixbuf ()</title>
<indexterm role="2.2"><primary>gnome_thumbnail_scale_down_pixbuf</primary></indexterm><programlisting><link linkend="GdkPixbuf">GdkPixbuf</link>* gnome_thumbnail_scale_down_pixbuf (<link linkend="GdkPixbuf">GdkPixbuf</link> *pixbuf,
<link linkend="int">int</link> dest_width,
<link linkend="int">int</link> dest_height);</programlisting>
<para>
Scales the pixbuf to the desired size. This function
is a lot faster than gdk-pixbuf when scaling down by
large amounts.</para>
<para>
</para><variablelist role="params">
<varlistentry><term><parameter>pixbuf</parameter> :</term>
<listitem><simpara> a <link linkend="GdkPixbuf"><type>GdkPixbuf</type></link>
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>dest_width</parameter> :</term>
<listitem><simpara> the desired new width
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>dest_height</parameter> :</term>
<listitem><simpara> the desired new height
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis> :</term><listitem><simpara> a scaled pixbuf
</simpara></listitem></varlistentry>
</variablelist><para role="since">Since 2.2
</para></refsect2>
<refsect2>
<title><anchor id="gnome-thumbnail-has-uri" role="function" condition="since:2.2"/>gnome_thumbnail_has_uri ()</title>
<indexterm role="2.2"><primary>gnome_thumbnail_has_uri</primary></indexterm><programlisting><link linkend="gboolean">gboolean</link> gnome_thumbnail_has_uri (<link linkend="GdkPixbuf">GdkPixbuf</link> *pixbuf,
const <link linkend="char">char</link> *uri);</programlisting>
<para>
Returns whether the thumbnail has the correct uri embedded in the
Thumb::URI option in the png.</para>
<para>
</para><variablelist role="params">
<varlistentry><term><parameter>pixbuf</parameter> :</term>
<listitem><simpara> an loaded thumbnail pixbuf
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>uri</parameter> :</term>
<listitem><simpara> a uri
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis> :</term><listitem><simpara> TRUE if the thumbnail is for <parameter>uri</parameter>
</simpara></listitem></varlistentry>
</variablelist><para role="since">Since 2.2
</para></refsect2>
<refsect2>
<title><anchor id="gnome-thumbnail-is-valid" role="function" condition="since:2.2"/>gnome_thumbnail_is_valid ()</title>
<indexterm role="2.2"><primary>gnome_thumbnail_is_valid</primary></indexterm><programlisting><link linkend="gboolean">gboolean</link> gnome_thumbnail_is_valid (<link linkend="GdkPixbuf">GdkPixbuf</link> *pixbuf,
const <link linkend="char">char</link> *uri,
<link linkend="time-t">time_t</link> mtime);</programlisting>
<para>
Returns whether the thumbnail has the correct uri and mtime embedded in the
png options.</para>
<para>
</para><variablelist role="params">
<varlistentry><term><parameter>pixbuf</parameter> :</term>
<listitem><simpara> an loaded thumbnail <link linkend="GdkPixbuf"><type>GdkPixbuf</type></link>
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>uri</parameter> :</term>
<listitem><simpara> a uri
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>mtime</parameter> :</term>
<listitem><simpara> the mtime
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis> :</term><listitem><simpara> TRUE if the thumbnail has the right <parameter>uri</parameter> and <parameter>mtime</parameter>
</simpara></listitem></varlistentry>
</variablelist><para role="since">Since 2.2
</para></refsect2>
<refsect2>
<title><anchor id="gnome-thumbnail-md5" role="function" condition="since:2.2"/>gnome_thumbnail_md5 ()</title>
<indexterm role="2.2"><primary>gnome_thumbnail_md5</primary></indexterm><programlisting><link linkend="char">char</link>* gnome_thumbnail_md5 (const <link linkend="char">char</link> *uri);</programlisting>
<para>
Calculates the MD5 checksum of the uri. This can be useful
if you want to manually handle thumbnail files.</para>
<para>
</para><variablelist role="params">
<varlistentry><term><parameter>uri</parameter> :</term>
<listitem><simpara> an uri
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis> :</term><listitem><simpara> A string with the MD5 digest of the uri string.
</simpara></listitem></varlistentry>
</variablelist><para role="since">Since 2.2
</para></refsect2>
<refsect2>
<title><anchor id="gnome-thumbnail-path-for-uri" role="function" condition="since:2.2"/>gnome_thumbnail_path_for_uri ()</title>
<indexterm role="2.2"><primary>gnome_thumbnail_path_for_uri</primary></indexterm><programlisting><link linkend="char">char</link>* gnome_thumbnail_path_for_uri (const <link linkend="char">char</link> *uri,
<link linkend="GnomeThumbnailSize">GnomeThumbnailSize</link> size);</programlisting>
<para>
Returns the filename that a thumbnail of size <parameter>size</parameter> for <parameter>uri</parameter> would have.</para>
<para>
</para><variablelist role="params">
<varlistentry><term><parameter>uri</parameter> :</term>
<listitem><simpara> an uri
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>size</parameter> :</term>
<listitem><simpara> a thumbnail size
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis> :</term><listitem><simpara> an absolute filename
</simpara></listitem></varlistentry>
</variablelist><para role="since">Since 2.2
</para></refsect2>
</refsect1>
</refentry>
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