<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Attachment #107095 is obsolete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>