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<title>g2: virtual device related functions</title>
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<h1>virtual device related functions<br>
<small>
[<a class="el" href="group__interface.html">g2 User Interface</a>]</small>
</h1><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__vd.html#g140fb10e1c95834e3f2380bb4103ce4b">g2_open_vd</a> (void)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__vd.html#g7b455ab14d94ad12443c7f3e7520607b">g2_attach</a> (int vd_dev, int dev)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__vd.html#g62bb52898c4319f8cac9440876608b88">g2_detach</a> (int vd_dev, int dev)</td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
Virtual device is a method to redirect g2 output to multiple devices. Here is an example:<p>
<div class="fragment"><pre class="fragment"> <span class="keywordtype">int</span> d1 = <a class="code" href="group__X11.html#gb36e635122fa975ef0f4c646a15314bb">g2_open_X11</a>(100, 100); create first X11 window
<span class="keywordtype">int</span> d2 = <a class="code" href="group__X11.html#gb36e635122fa975ef0f4c646a15314bb">g2_open_X11</a>(100, 100); create 2nd X11 window
<span class="keywordtype">int</span> vd = <a class="code" href="group__vd.html#g140fb10e1c95834e3f2380bb4103ce4b">g2_open_vd</a>(); open a <span class="keyword">new</span> <span class="keyword">virtual</span> device
<a class="code" href="group__vd.html#g7b455ab14d94ad12443c7f3e7520607b">g2_attach</a>(vd, d1); attach d1 (1st window) to <span class="keyword">virtual</span> device
<a class="code" href="group__vd.html#g7b455ab14d94ad12443c7f3e7520607b">g2_attach</a>(vd, d2); attach d2 (2nd window) to <span class="keyword">virtual</span> device
<a class="code" href="group__graphic.html#g72fe3325f5927565723b8bb655d6f9aa">g2_plot</a>(d1, 11, 11); output to the 1st X11 window
<a class="code" href="group__graphic.html#g72fe3325f5927565723b8bb655d6f9aa">g2_plot</a>(d2, 12, 12); output to the 2nd X11 window
<a class="code" href="group__graphic.html#g72fe3325f5927565723b8bb655d6f9aa">g2_plot</a>(vd, 13, 13); output to both X11 windows
</pre></div> <hr><h2>Function Documentation</h2>
<a class="anchor" name="g7b455ab14d94ad12443c7f3e7520607b"></a><!-- doxytag: member="g2_ui_virtual_device.c::g2_attach" ref="g7b455ab14d94ad12443c7f3e7520607b" args="(int vd_dev, int dev)" --><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
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<td class="md" nowrap valign="top">void g2_attach </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">int </td>
<td class="mdname" nowrap> <em>vd_dev</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>int </td>
<td class="mdname" nowrap> <em>dev</em></td>
</tr>
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<td class="md"></td>
<td class="md">) </td>
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Attach a device to virtual device <em>vd_dev</em>.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>vd_dev</em> </td><td>virtual device (create virtual device by calling <a class="el" href="group__vd.html#g140fb10e1c95834e3f2380bb4103ce4b">g2_open_vd()</a> ) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dev</em> </td><td>device </td></tr>
</table>
</dl>
</td>
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<a class="anchor" name="g62bb52898c4319f8cac9440876608b88"></a><!-- doxytag: member="g2_ui_virtual_device.c::g2_detach" ref="g62bb52898c4319f8cac9440876608b88" args="(int vd_dev, int dev)" --><p>
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<td class="md" nowrap valign="top">void g2_detach </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">int </td>
<td class="mdname" nowrap> <em>vd_dev</em>, </td>
</tr>
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<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>int </td>
<td class="mdname" nowrap> <em>dev</em></td>
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<td class="md"></td>
<td class="md">) </td>
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<p>
Dettach a device from the virtual device <em>vd_dev</em>.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>vd_dev</em> </td><td>virtual device </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dev</em> </td><td>device </td></tr>
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</dl>
</td>
</tr>
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<a class="anchor" name="g140fb10e1c95834e3f2380bb4103ce4b"></a><!-- doxytag: member="g2_ui_virtual_device.c::g2_open_vd" ref="g140fb10e1c95834e3f2380bb4103ce4b" args="(void)" --><p>
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<td class="md" nowrap valign="top">int g2_open_vd </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">void </td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap></td>
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</td>
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<p>
Create a new virtual device.<p>
<dl compact><dt><b>Returns:</b></dt><dd>virtual device ID </dd></dl>
</td>
</tr>
</table>
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