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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [Win] Tiled drawing is render context more times than it should"
href="https://bugs.webkit.org/show_bug.cgi?id=149144">149144</a>
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<th>Summary</th>
<td>[Win] Tiled drawing is render context more times than it should
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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 Nightly 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>Layout and Rendering
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>bfulgham@webkit.org
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<pre>Errors in the Windows tiled drawing implementation cause WebKit to draw the same content multiple times. Furthermore, the nested CALayers used in the tiled drawing system caused the coordinate system to be flipped twice, causing some content to render upside down.
This patch corrects both of these problems. It also has the benefit of causing the debug border drawing for accelerated compositing to work properly on Windows.</pre>
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