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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"><title>GtkPreview</title><meta name="generator" content="DocBook XSL Stylesheets V1.73.2"><link rel="start" href="index.html" title="GTK+ Reference Manual"><link rel="up" href="DeprecatedObjects.html" title="Deprecated"><link rel="prev" href="GtkPixmap.html" title="GtkPixmap"><link rel="next" href="GtkProgress.html" title="GtkProgress"><meta name="generator" content="GTK-Doc V1.9 (XML mode)"><link rel="stylesheet" href="style.css" type="text/css"><link rel="part" href="gtk.html" title="Part I. GTK+ Overview"><link rel="part" href="gtkbase.html" title="Part II. GTK+ Core Reference"><link rel="part" href="gtkobjects.html" title="Part III. GTK+ Widgets and Objects"><link rel="chapter" href="ch01.html" title="Object Hierarchy"><link rel="chapter" href="ch02.html" title="Widget Gallery"><link rel="chapter" href="WindowWidgets.html" 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href="glossary.html" title="Glossary"><link rel="index" href="ix01.html" title="Index"><link rel="index" href="ix02.html" title="Index of deprecated symbols"><link rel="index" href="ix03.html" title="Index of new symbols in 2.2"><link rel="index" href="ix04.html" title="Index of new symbols in 2.4"><link rel="index" href="ix05.html" title="Index of new symbols in 2.6"><link rel="index" href="ix06.html" title="Index of new symbols in 2.8"><link rel="index" href="ix07.html" title="Index of new symbols in 2.10"><link rel="index" href="ix08.html" title="Index of new symbols in 2.12"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2"><tr valign="middle"><td><a accesskey="p" href="GtkPixmap.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td><td><a accesskey="u" href="DeprecatedObjects.html"><img src="up.png" width="24" height="24" border="0" alt="Up"></a></td><td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td><th width="100%" align="center">GTK+ Reference Manual</th><td><a accesskey="n" href="GtkProgress.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td></tr><tr><td colspan="5" class="shortcuts"><nobr><a href="#id4570572" class="shortcut">Top</a>  |  <a href="#id4571185" class="shortcut">Description</a>  |  <a href="#id4571074" class="shortcut">Object Hierarchy</a>  |  <a href="#id4571121" class="shortcut">Implemented Interfaces</a>  |  <a href="#id4571151" class="shortcut">Properties</a></nobr></td></tr></table><div class="refentry" lang="en"><a name="GtkPreview"></a><div class="titlepage"></div><div class="refnamediv"><table width="100%"><tr><td valign="top"><h2><a name="id4570572"></a><span class="refentrytitle">GtkPreview</span></h2><p>GtkPreview — A widget to display RGB or grayscale data</p></td><td valign="top" align="right"></td></tr></table></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="synopsis">#include <gtk/gtk.h> <a class="link" href="GtkPreview.html#GtkPreview-struct">GtkPreview</a>; <a class="link" href="GtkPreview.html#GtkPreviewInfo">GtkPreviewInfo</a>;union <a class="link" href="GtkPreview.html#GtkDitherInfo">GtkDitherInfo</a>;void <a class="link" href="GtkPreview.html#gtk-preview-uninit">gtk_preview_uninit</a> (void);<a class="link" href="GtkWidget.html" title="GtkWidget">GtkWidget</a>* <a class="link" href="GtkPreview.html#gtk-preview-new">gtk_preview_new</a> (<a class="link" href="gtk-Standard-Enumerations.html#GtkPreviewType">GtkPreviewType</a> type);void <a class="link" href="GtkPreview.html#gtk-preview-size">gtk_preview_size</a> (<a class="link" href="GtkPreview.html" title="GtkPreview">GtkPreview</a> *preview, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint">gint</a> width, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint">gint</a> height);void <a class="link" href="GtkPreview.html#gtk-preview-put">gtk_preview_put</a> (<a class="link" href="GtkPreview.html" title="GtkPreview">GtkPreview</a> *preview, <ahref="/usr/share/gtk-doc/html/gdk/gdk-Windows.html#GdkWindow">GdkWindow</a> *window, <ahref="/usr/share/gtk-doc/html/gdk/gdk-Graphics-Contexts.html#GdkGC">GdkGC</a> *gc, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint">gint</a> srcx, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint">gint</a> srcy, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint">gint</a> destx, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint">gint</a> desty, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint">gint</a> width, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint">gint</a> height);void <a class="link" href="GtkPreview.html#gtk-preview-draw-row">gtk_preview_draw_row</a> (<a class="link" href="GtkPreview.html" title="GtkPreview">GtkPreview</a> *preview, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guchar">guchar</a> *data, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint">gint</a> x, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint">gint</a> y, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint">gint</a> w);void <a class="link" href="GtkPreview.html#gtk-preview-set-expand">gtk_preview_set_expand</a> (<a class="link" href="GtkPreview.html" title="GtkPreview">GtkPreview</a> *preview, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean">gboolean</a> expand);void <a class="link" href="GtkPreview.html#gtk-preview-set-gamma">gtk_preview_set_gamma</a> (double gamma_);void <a class="link" href="GtkPreview.html#gtk-preview-set-color-cube">gtk_preview_set_color_cube</a> (<ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint">guint</a> nred_shades, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint">guint</a> ngreen_shades, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint">guint</a> nblue_shades, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint">guint</a> ngray_shades);void <a class="link" href="GtkPreview.html#gtk-preview-set-install-cmap">gtk_preview_set_install_cmap</a> (<ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint">gint</a> install_cmap);void <a class="link" href="GtkPreview.html#gtk-preview-set-reserved">gtk_preview_set_reserved</a> (<ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint">gint</a> nreserved);void <a class="link" href="GtkPreview.html#gtk-preview-set-dither">gtk_preview_set_dither</a> (<a class="link" href="GtkPreview.html" title="GtkPreview">GtkPreview</a> *preview, <ahref="/usr/share/gtk-doc/html/gdk/gdk-GdkRGB.html#GdkRgbDither">GdkRgbDither</a> dither);<ahref="/usr/share/gtk-doc/html/gdk/gdk-Visuals.html#GdkVisual">GdkVisual</a>* <a class="link" href="GtkPreview.html#gtk-preview-get-visual">gtk_preview_get_visual</a> (void);<ahref="/usr/share/gtk-doc/html/gdk/gdk-Colormaps-and-Colors.html#GdkColormap">GdkColormap</a>* <a class="link" href="GtkPreview.html#gtk-preview-get-cmap">gtk_preview_get_cmap</a> (void);<a class="link" href="GtkPreview.html#GtkPreviewInfo">GtkPreviewInfo</a>* <a class="link" href="GtkPreview.html#gtk-preview-get-info">gtk_preview_get_info</a> (void);void <a class="link" href="GtkPreview.html#gtk-preview-reset">gtk_preview_reset</a> (void);</pre></div><div class="refsect1" lang="en"><a name="id4571074"></a><h2>Object Hierarchy</h2><pre class="synopsis"> <ahref="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a> +----<ahref="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a> +----<a class="link" href="GtkObject.html" title="GtkObject">GtkObject</a> +----<a class="link" href="GtkWidget.html" title="GtkWidget">GtkWidget</a> +----GtkPreview</pre></div><div class="refsect1" lang="en"><a name="id4571121"></a><h2>Implemented Interfaces</h2><p>GtkPreview implements AtkImplementorIface and <a class="link" href="gtk-gtkbuildable.html#GtkBuildable">GtkBuildable</a>.</p></div><div class="refsect1" lang="en"><a name="id4571151"></a><h2>Properties</h2><pre class="synopsis"> "<a class="link" href="GtkPreview.html#GtkPreview--expand">expand</a>" <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean">gboolean</a> : Read / Write</pre></div><div class="refsect1" lang="en"><a name="id4571185"></a><h2>Description</h2><p>The <a class="link" href="GtkPreview.html" title="GtkPreview"><span class="type">GtkPreview</span></a> widget provides a simple interface used to display images as RGB or grayscale data.It's deprecated; just use a <ahref="/usr/share/gtk-doc/html/gdk-pixbuf/gdk-pixbuf-gdk-pixbuf.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a> displayed by a <a class="link" href="GtkImage.html" title="GtkImage"><span class="type">GtkImage</span></a>, orperhaps a <a class="link" href="GtkDrawingArea.html" title="GtkDrawingArea"><span class="type">GtkDrawingArea</span></a>. <a class="link" href="GtkPreview.html" title="GtkPreview"><span class="type">GtkPreview</span></a> has no advantage over those approaches.</p></div><div class="refsect1" lang="en"><a name="id4571242"></a><h2>Details</h2><div class="refsect2" lang="en"><a name="id4571252"></a><h3><a name="GtkPreview-struct"></a>GtkPreview</h3><a class="indexterm" name="id4571265"></a><pre class="programlisting">typedef struct _GtkPreview GtkPreview;</pre><div class="warning" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Warning</h3><p><code class="literal">GtkPreview</code> is deprecated and should not be used in newly-written code.</p></div><p>The <a class="link" href="GtkPreview.html#GtkPreview-struct"><span class="type">GtkPreview</span></a> struct contains private data only, andshould be accessed using the functions below.</p></div><hr><div class="refsect2" lang="en"><a name="id4571303"></a><h3><a name="GtkPreviewInfo"></a>GtkPreviewInfo</h3><a class="indexterm" name="id4571318"></a><pre class="programlisting">typedef struct { guchar *lookup; gdouble gamma;} GtkPreviewInfo;</pre><div class="warning" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Warning</h3><p><code class="literal">GtkPreviewInfo</code> is deprecated and should not be used in newly-written code.</p></div><p>Contains information about global propertiesof preview widgets.The <a class="link" href="GtkPreview.html#GtkPreviewInfo"><span class="type">GtkPreviewInfo</span></a> struct contains the following fields.(These fields should be considered read-only. They should never be set byan application.)</p><div class="informaltable"><table width="100%" border="0"><colgroup><col><col></colgroup><tbody><tr><td><ahref="/usr/share/gtk-doc/html/gdk/gdk-Visuals.html#GdkVisual"><span class="type">GdkVisual</span></a> *visual;</td><td>the visual used by all previews.</td></tr><tr><td><ahref="/usr/share/gtk-doc/html/gdk/gdk-Colormaps-and-Colors.html#GdkColormap"><span class="type">GdkColormap</span></a> *cmap;</td><td>the colormap used by all previews.</td></tr><tr><td>gdouble gamma;</td><td>the gamma correction value used by all previews (See <a class="link" href="GtkPreview.html#gtk-preview-set-gamma"><code class="function">gtk_preview_set_gamma()</code></a>).</td></tr></tbody></table></div><p></p></div><hr><div class="refsect2" lang="en"><a name="id4571443"></a><h3><a name="GtkDitherInfo"></a>union GtkDitherInfo</h3><a class="indexterm" name="id4571458"></a><pre class="programlisting">union GtkDitherInfo{⌨️ 快捷键说明
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