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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Whether to use the "subsurfaces"?"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94312">94312</a>
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<th>Summary</th>
<td>Whether to use the "subsurfaces"?
</td>
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<th>Product</th>
<td>Wayland
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>wayland
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<th>Assignee</th>
<td>wayland-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>belnd@grr.la
</td>
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<p>
<div>
<pre>So, consider a button with text. In the shm file are:
* three button states: normal, pressed and hovered pointer,
* the rendered text.
A total of 4 bitmaps.
How best to organize the rendering of the button?
1. To use the "subsurfaces" for the text and for the button, changing its 3
state when needed.
2. To draw directly in "shellsurface". The text and the button state is
stored in memory, but each time the update button will be copied into a
separate memory area "wl_buffer" for "shellsurface".
At the end of the article concludes that the surface is better not to use when
building widgets. <a href="http://ppaalanen.blogspot.ru/2013/11/sub-surfaces-now.html">http://ppaalanen.blogspot.ru/2013/11/sub-surfaces-now.html</a>
It turns out that you need to use method #2, but then each time you hover the
cursor, the client will copy the button state and text. You can make a crutch:
cutting text bitmap from the bitmaps of the button states, then when you hover
the cursor would to copy _only_ the button state. But still not effective..
Stop, handling the pointer-hover is possible because only in the presence of
the surface.. of a button.</pre>
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</p>
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