<html>
    <head>
      <base href="https://bugs.documentfoundation.org/">
    </head>
    <body><span class="vcard"><a class="email" href="mailto:thb@libreoffice.org" title="Thorsten Behrens (CIB) <thb@libreoffice.org>"> <span class="fn">Thorsten Behrens (CIB)</span></a>
</span> changed
          <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED NOTOURBUG - "1-bit colormap" PNG images print as solid black boxes"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=75285">bug 75285</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;">Resolution</td>
           <td>---
           </td>
           <td>NOTOURBUG
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Status</td>
           <td>NEW
           </td>
           <td>RESOLVED
           </td>
         </tr></table>
      <p>
        <div>
            <b><a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED NOTOURBUG - "1-bit colormap" PNG images print as solid black boxes"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=75285#c27">Comment # 27</a>
              on <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED NOTOURBUG - "1-bit colormap" PNG images print as solid black boxes"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=75285">bug 75285</a>
              from <span class="vcard"><a class="email" href="mailto:thb@libreoffice.org" title="Thorsten Behrens (CIB) <thb@libreoffice.org>"> <span class="fn">Thorsten Behrens (CIB)</span></a>
</span></b>
        <pre>So after much testing (Linux & Windows), I now believe this is NOTOURBUG.

While in 2018, on an opensuse Leap, I was able to repro, by now (using versions
as old as 5.2.7), I don't see it anymore (neither print to PDF, nor export as
PDF, nor print to CUPS-connected printer and intercepting the spool file shows
the prob).

Versions:
* opensuse Tumbleweed - 20200108
* cups-filters-1.25.0-2.2.x86_64
* libcups2-2.3b6-1.3.x86_64
* libcupsimage2-2.3b6-1.3.x86_64
* cups-2.3b6-1.3.x86_64

This was very likely some bits in the CUPS filter chain meddling with the image
- LibreOffice is passing down:

4 0 obj
<</Type/XObject/Subtype/Image/Width 1230/Height 1230/BitsPerComponent 1/Length
5 0 R
/Filter/CCITTFaxDecode/DecodeParms<</K -1/BlackIs1 true/Columns 1230>>
/ColorSpace/DeviceGray
/Mask 6 0 R

Whereas earlier CUPS output then converted that into:

8 0 obj
<</Subtype/Image
/ColorSpace/DeviceRGB
/Width 1230
/Height 1230
/BitsPerComponent 8
/Filter/DCTDecode/Length 42130>></pre>
        </div>
      </p>


      <hr>
      <span>You are receiving this mail because:</span>

      <ul>
          <li>You are the assignee for the bug.</li>
      </ul>
    </body>
</html>