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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - wayland: gtk+ prevents using subsurfaces if the parent is not root"
href="https://bugzilla.gnome.org/show_bug.cgi?id=774475">774475</a>
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<th>Summary</th>
<td>wayland: gtk+ prevents using subsurfaces if the parent is not root
</td>
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<th>Classification</th>
<td>Platform
</td>
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<th>Product</th>
<td>gtk+
</td>
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<th>Version</th>
<td>3.22.x
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>Normal
</td>
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<th>Component</th>
<td>Backend: Wayland
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<th>Assignee</th>
<td>gtk-bugs@gtk.org
</td>
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<th>Reporter</th>
<td>ofourdan@redhat.com
</td>
</tr>
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<th>QA Contact</th>
<td>gtk-bugs@gtk.org
</td>
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<th>CC</th>
<td>rob@robster.org.uk, wayland-bugs@lists.freedesktop.org
</td>
</tr>
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<th>GNOME version</th>
<td>---
</td>
</tr></table>
<p>
<div>
<pre>Description:
Under Wayland, a subsurface would have another surface as parent, but gdk would
not allow native windows if the parent is not the root window:
<a href="https://git.gnome.org/browse/gtk+/tree/gdk/gdkwindow.c#n1218">https://git.gnome.org/browse/gtk+/tree/gdk/gdkwindow.c#n1218</a>
As a result, the subsurface.c example in gtk+ is not actually using a Wayland
sursurface, because the parent is not the root window:
<a href="https://git.gnome.org/browse/gtk+/tree/tests/subsurface.c?h=gtk-3-22#n49">https://git.gnome.org/browse/gtk+/tree/tests/subsurface.c?h=gtk-3-22#n49</a>
Note, the test subsurface.c has been removed from master, but that's unrelated,
a program should be able to create a subsurface with a parent and not just the
root window.</pre>
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