https://bugs.documentfoundation.org/show_bug.cgi?id=149943

            Bug ID: 149943
           Summary: Pixelated PDF export and print for a rotated image
           Product: LibreOffice
           Version: 6.4.0.3 release
          Hardware: All
               URL: https://ask.libreoffice.org/t/pixelated-images-in-prin
                    t-export-to-pdf/79392/
                OS: All
            Status: UNCONFIRMED
          Keywords: bibisectRequest, regression
          Severity: normal
          Priority: medium
         Component: Writer
          Assignee: [email protected]
          Reporter: [email protected]

Created attachment 181221
  --> https://bugs.documentfoundation.org/attachment.cgi?id=181221&action=edit
Same image rotated and unrotated

Open the attachment (which has the same image, top rotated, bottom unrotated),
and export to PDF (choose no downsampling and lossless compression of images in
the export-to-PDF dialog).

The top image exports awfully, having 14 pixels high image in the PDF. The
bottom (unrotated) image exports perfectly, creating barcode with sharp strips
(no blurring/antialiasing).

The problem appeared in today's form since v.6.4; in vv. 6.1 - 6.3, the top
image was exported much better, but there it was a bit blurry - so it had a bit
worse quality than the bottom one. In 6.0, the top image was rotated
incorrectly (so that the strips were not horizontal, but diagonal). In 5.0, the
rotation ot the top image was lost completely.

Additional observed problem: it's impossible to move the top (rotated) image
closer to the top.

Ref:
https://ask.libreoffice.org/t/pixelated-images-in-print-export-to-pdf/79392/

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