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  <span class="target" id="module-cairocffi.xcb"></span><div class="section" id="using-xcb-surfaces-with-xcffib">
<h1>Using XCB surfaces with xcffib<a class="headerlink" href="#using-xcb-surfaces-with-xcffib" title="Permalink to this headline"></a></h1>
<p>The <a class="reference internal" href="#module-cairocffi.xcb" title="cairocffi.xcb"><code class="xref py py-mod docutils literal"><span class="pre">cairocffi.xcb</span></code></a> module uses <a class="reference external" href="https://github.com/tych0/xcffib/">xcffib</a> as the XCB library to create
graphics for X windows and pixmaps.</p>
<dl class="class">
<dt id="cairocffi.xcb.XCBSurface">
<em class="property">class </em><code class="descclassname">cairocffi.xcb.</code><code class="descname">XCBSurface</code><span class="sig-paren">(</span><em>conn</em>, <em>drawable</em>, <em>visual</em>, <em>width</em>, <em>height</em><span class="sig-paren">)</span><a class="headerlink" href="#cairocffi.xcb.XCBSurface" title="Permalink to this definition"></a></dt>
<dd><p>The XCB surface is used to render cairo graphics to X Window System
windows and pixmaps using the XCB library.</p>
<p>Creates a cairo surface that targets the given drawable (pixmap or window).</p>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">This class works using objects and libraries in <code class="xref py py-mod docutils literal"><span class="pre">xcffib</span></code></p>
</div>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
<li><strong>conn</strong> &#8211; The <code class="xref py py-class docutils literal"><span class="pre">xcffib.Connection</span></code> for an open XCB connection</li>
<li><strong>drawable</strong> &#8211; An XID corresponding to an XCB drawable (a pixmap or a window)</li>
<li><strong>visual</strong> &#8211; An <code class="xref py py-class docutils literal"><span class="pre">xcffib.xproto.VISUALTYPE</span></code> object.</li>
<li><strong>width</strong> &#8211; integer</li>
<li><strong>height</strong> &#8211; integer</li>
</ul>
</td>
</tr>
</tbody>
</table>
<dl class="method">
<dt id="cairocffi.xcb.XCBSurface.set_size">
<code class="descname">set_size</code><span class="sig-paren">(</span><em>width</em>, <em>height</em><span class="sig-paren">)</span><a class="headerlink" href="#cairocffi.xcb.XCBSurface.set_size" title="Permalink to this definition"></a></dt>
<dd><p>Informs cairo of the new size of the X Drawable underlying the surface.
For a surface created for a Window (rather than a Pixmap), this
function must be called each time the size of the window changes (for
a subwindow, you are normally resizing the window yourself, but for a
toplevel window, it is necessary to listen for
<code class="xref py py-class docutils literal"><span class="pre">xcffib.xproto.ConfigureNotifyEvent</span></code>&#8216;s).</p>
<p>A Pixmap can never change size, so it is never necessary to call this
function on a surface created for a Pixmap.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
<li><strong>width</strong> &#8211; integer</li>
<li><strong>height</strong> &#8211; integer</li>
</ul>
</td>
</tr>
</tbody>
</table>
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