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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [ThreadedCompositor] Scrolling artifacts on accelerated subframes"
href="https://bugs.webkit.org/show_bug.cgi?id=149060">149060</a>
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<th>Summary</th>
<td>[ThreadedCompositor] Scrolling artifacts on accelerated subframes
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<th>Classification</th>
<td>Unclassified
</td>
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<th>Product</th>
<td>WebKit
</td>
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<th>Version</th>
<td>WebKit Local Build
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<th>Hardware</th>
<td>Unspecified
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<th>OS</th>
<td>Unspecified
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>Normal
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<th>Priority</th>
<td>P2
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<th>Component</th>
<td>WebKit Gtk
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>emanuele.aina@collabora.com
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<th>CC</th>
<td>yoon@igalia.com
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<pre>Created <span class=""><a href="attachment.cgi?id=261000" name="attach_261000" title="Accelerated subframe testcase">attachment 261000</a> <a href="attachment.cgi?id=261000&action=edit" title="Accelerated subframe testcase">[details]</a></span>
Accelerated subframe testcase
When scrolling an accelerated subframe (eg. an <iframe> containing a transformed element, see the attached scroll.html file) the main frame is scrolled temporarily producing ugly glitches.
This seems to due to excessive scroll notifications where the lower layers notify the upper layers again.
I guess an automated testcase would be appropriate, but I don't know where to start, any suggestion would be appropriate.</pre>
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