<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body><span class="vcard"><a class="email" href="mailto:sixtysix@inwind.it" title="Massimo <sixtysix@inwind.it>"> <span class="fn">Massimo</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEW "
title="NEW - cairo-tor-scan-converter is off by half of a subrow."
href="https://bugs.freedesktop.org/show_bug.cgi?id=84396">bug 84396</a>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Attachment #107095 is obsolete</td>
<td>
</td>
<td>1
</td>
</tr></table>
<p>
<div>
<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - cairo-tor-scan-converter is off by half of a subrow."
href="https://bugs.freedesktop.org/show_bug.cgi?id=84396#c25">Comment # 25</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - cairo-tor-scan-converter is off by half of a subrow."
href="https://bugs.freedesktop.org/show_bug.cgi?id=84396">bug 84396</a>
from <span class="vcard"><a class="email" href="mailto:sixtysix@inwind.it" title="Massimo <sixtysix@inwind.it>"> <span class="fn">Massimo</span></a>
</span></b>
<pre>Created <span class=""><a href="attachment.cgi?id=107344" name="attach_107344" title="increase coverage area precision">attachment 107344</a> <a href="attachment.cgi?id=107344&action=edit" title="increase coverage area precision">[details]</a></span> <a href='page.cgi?id=splinter.html&bug=84396&attachment=107344'>[review]</a>
increase coverage area precision
There is a loss of precision in the last step of the analytical
coverage computation, that is, the uncovered area does not depend
on the number of subrows and can be computed to a greater accuracy,
improving the overall symmetrical behaviour:
the output images of record{,flip}-paint-alpha-clip-mask become
the 180°-rotated version of each other
and the output of a8-clear is within +-1 from its 180°-rotated
version.
If something like this is considered worth it, perhaps after playing
with GRID_Y or GRID_Y_BITS and EXTRA_Y, a specialized version
of GRID_AREA_TO_ALPHA could be added for the new value of GRID_XY.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the QA Contact for the bug.</li>
</ul>
</body>
</html>