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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [Cairo] Improve image quality when using newer versions of cairo/pixman"
href="https://bugs.webkit.org/show_bug.cgi?id=147826">147826</a>
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<th>Summary</th>
<td>[Cairo] Improve image quality when using newer versions of cairo/pixman
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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>528+ (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
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<th>Keywords</th>
<td>Cairo
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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>Platform
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>cgarcia@igalia.com
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<p>
<div>
<pre>Since cairo 1.14 the image filters changed a bit:
- CAIRO_FILTER_GOOD uses a box filter when downscaling if the scale factor is less than 0.75, otherwise it uses a filter equivalent to CAIRO_FILTER_BILINEAR.
- CAIRO_FILTER_BEST uses always a Catmull-Rom filter.
We are currently using CAIRO_FILTER_BILINEAR for medium, high and default interpolation levels. We could use CAIRO_FILTER_GOOD for medium and default, and CAIRO_FILTER_BEST for high. This will not have any effect in previous versions of cairo because before 1.14 CAIRO_FILTER_GOOD, CAIRO_FILTER_BILINEAR and CAIRO_FILTER_BEST had the same implementation in pixman.</pre>
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