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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_UNCONFIRMED "
   title="UNCONFIRMED - Compressing PNG files with alpha channel get a black background"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=128992">128992</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Compressing PNG files with alpha channel get a black background
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>LibreOffice
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>6.3.2.2 release
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Mac OS X (All)
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>UNCONFIRMED
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Writer
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>libreoffice-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>francois.berger@gmail.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="http://bugs.documentfoundation.org/attachment.cgi?id=156072" name="attach_156072" title="png file to reproduce">attachment 156072</a> <a href="http://bugs.documentfoundation.org/attachment.cgi?id=156072&action=edit" title="png file to reproduce">[details]</a></span>
png file to reproduce

Compressing PNG files with alpha channel get a black background.

Steps to reproduce :
- insert a png file with alpha channel (see example in attachement) into
libreoffice writer (either using the insert menu or drag and drop)
- right-click "compress"
- in the compress dialog box use JPEG compression, then click OK
- image gets compressed with black background

Used to work properly (i.e. get a white background) with previous libreoffice
versions
Same issue with Draw</pre>
        </div>
      </p>


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