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  • Committer: Package Import Robot
  • Author(s): Robert Ancell
  • Date: 2013-01-10 12:53:20 UTC
  • mfrom: (1.14.16)
  • Revision ID: package-import@ubuntu.com-20130110125320-x13bjpwtqq36izs2
Tags: 2.24.14-0ubuntu1
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docs/reference/gtk/html/gtk-Graphics-Contexts.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>Graphics Contexts</title>
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<meta name="generator" content="DocBook XSL Stylesheets V1.77.1">
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<link rel="home" href="index.html" title="GTK+ 2 Reference Manual">
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<link rel="up" href="gtkbase.html" title="Part II. GTK+ Core Reference">
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<link rel="prev" href="gtk-Standard-Enumerations.html" title="Standard Enumerations">
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<link rel="next" href="GtkStyle.html" title="Styles">
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<meta name="generator" content="GTK-Doc V1.18.1 (XML mode)">
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<link rel="stylesheet" href="style.css" type="text/css">
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</head>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
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<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2">
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<tr valign="middle">
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<td><a accesskey="p" href="gtk-Standard-Enumerations.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td>
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<td><a accesskey="u" href="gtkbase.html"><img src="up.png" width="24" height="24" border="0" alt="Up"></a></td>
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<td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td>
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<th width="100%" align="center">GTK+ 2 Reference Manual</th>
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<td><a accesskey="n" href="GtkStyle.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td>
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</tr>
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<tr><td colspan="5" class="shortcuts">
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<a href="#gtk-Graphics-Contexts.synopsis" class="shortcut">Top</a>
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                   | 
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                  <a href="#gtk-Graphics-Contexts.description" class="shortcut">Description</a>
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</td></tr>
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</table>
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<div class="refentry">
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<a name="gtk-Graphics-Contexts"></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><span class="refentrytitle"><a name="gtk-Graphics-Contexts.top_of_page"></a>Graphics Contexts</span></h2>
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<p>Graphics Contexts — A shared pool of GdkGC objects</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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<a name="gtk-Graphics-Contexts.synopsis"></a><h2>Synopsis</h2>
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<pre class="synopsis">
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#include &lt;gtk/gtk.h&gt;
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<a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGC"><span class="returnvalue">GdkGC</span></a> *             <a class="link" href="gtk-Graphics-Contexts.html#gtk-gc-get" title="gtk_gc_get ()">gtk_gc_get</a>                          (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> depth</code></em>,
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                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/gdk3/gdk-Colormaps-and-Colors.html#GdkColormap"><span class="type">GdkColormap</span></a> *colormap</code></em>,
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                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGCValues"><span class="type">GdkGCValues</span></a> *values</code></em>,
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                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGCValuesMask"><span class="type">GdkGCValuesMask</span></a> values_mask</code></em>);
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<span class="returnvalue">void</span>                <a class="link" href="gtk-Graphics-Contexts.html#gtk-gc-release" title="gtk_gc_release ()">gtk_gc_release</a>                      (<em class="parameter"><code><a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> *gc</code></em>);
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</pre>
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</div>
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<div class="refsect1">
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<a name="gtk-Graphics-Contexts.description"></a><h2>Description</h2>
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<p>
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These functions provide access to a shared pool of <a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> objects.
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When a new <a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> is needed, <a class="link" href="gtk-Graphics-Contexts.html#gtk-gc-get" title="gtk_gc_get ()"><code class="function">gtk_gc_get()</code></a> is called with the required depth,
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colormap and <a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGCValues"><span class="type">GdkGCValues</span></a>. If a <a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> with the required properties already
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exists then that is returned. If not, a new <a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> is created.
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When the <a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> is no longer needed, <a class="link" href="gtk-Graphics-Contexts.html#gtk-gc-release" title="gtk_gc_release ()"><code class="function">gtk_gc_release()</code></a> should be called.
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</p>
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</div>
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<div class="refsect1">
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<a name="gtk-Graphics-Contexts.details"></a><h2>Details</h2>
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<div class="refsect2">
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<a name="gtk-gc-get"></a><h3>gtk_gc_get ()</h3>
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<pre class="programlisting"><a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGC"><span class="returnvalue">GdkGC</span></a> *             gtk_gc_get                          (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> depth</code></em>,
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                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/gdk3/gdk-Colormaps-and-Colors.html#GdkColormap"><span class="type">GdkColormap</span></a> *colormap</code></em>,
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                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGCValues"><span class="type">GdkGCValues</span></a> *values</code></em>,
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                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGCValuesMask"><span class="type">GdkGCValuesMask</span></a> values_mask</code></em>);</pre>
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<p>
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Gets a <a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> with the given depth, colormap and <a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGCValues"><span class="type">GdkGCValues</span></a>.
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If a <a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> with the given properties already exists then it is returned,
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otherwise a new <a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> is created.
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The returned <a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> should be released with <a class="link" href="gtk-Graphics-Contexts.html#gtk-gc-release" title="gtk_gc_release ()"><code class="function">gtk_gc_release()</code></a> when it is no
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longer needed.
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</p>
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<div class="variablelist"><table border="0" class="variablelist">
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<colgroup>
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<col align="left" valign="top">
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<col>
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</colgroup>
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<tbody>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>depth</code></em> :</span></p></td>
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<td>the depth of the <a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> to create.</td>
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</tr>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>colormap</code></em> :</span></p></td>
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<td>the <a href="http://library.gnome.org/devel/gdk3/gdk-Colormaps-and-Colors.html#GdkColormap"><span class="type">GdkColormap</span></a> (FIXME: I don't know why this is needed).</td>
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</tr>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>values</code></em> :</span></p></td>
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<td>a <a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGCValues"><span class="type">GdkGCValues</span></a> struct containing settings for the <a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a>.</td>
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</tr>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>values_mask</code></em> :</span></p></td>
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<td>a set of flags indicating which of the fields in <em class="parameter"><code>values</code></em> has
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been set.</td>
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</tr>
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<tr>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
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<td>a <a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a>.</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">
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<a name="gtk-gc-release"></a><h3>gtk_gc_release ()</h3>
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<pre class="programlisting"><span class="returnvalue">void</span>                gtk_gc_release                      (<em class="parameter"><code><a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> *gc</code></em>);</pre>
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<p>
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Releases a <a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> allocated using <a class="link" href="gtk-Graphics-Contexts.html#gtk-gc-get" title="gtk_gc_get ()"><code class="function">gtk_gc_get()</code></a>.
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</p>
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<div class="variablelist"><table border="0" class="variablelist">
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<colgroup>
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<col align="left" valign="top">
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<col>
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</colgroup>
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<tbody><tr>
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<td><p><span class="term"><em class="parameter"><code>gc</code></em> :</span></p></td>
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<td>a <a href="http://library.gnome.org/devel/gdk3/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a>.</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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</div>
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<div class="footer">
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<hr>
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          Generated by GTK-Doc V1.18.1</div>
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</body>
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</html>
 
 
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