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  1. Qt
  2. QTBUG-68609

libqtiff image plugin does not set RowsPerStrip tag

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    • Icon: Bug Bug
    • Resolution: Done
    • Icon: P2: Important P2: Important
    • 5.11.1
    • 5.5.0
    • Image formats
    • None

      The TIFF plugin generates images without the RowsPerStrip tag defined. This causes read issues with most TIFF readers in the willd, in particular when the LZW compression is enabled: see https://issues.qgis.org/issues/18274

      A reasonable solution is to create stripped image by using the chunk height that is used to compress the data.

      The attached patch implements that

        1. new.tiff
          361 kB
        2. old.tiff
          233 kB
        3. tiff_rowsperstrip.patch
          6 kB
        For Gerrit Dashboard: QTBUG-68609
        # Subject Branch Project Status CR V
        231540,2 Fix tiffhandler: ensure saved tiffs have suitable ROWSPERSTRIP tag set 5.11 qt/qtimageformats Status: MERGED +2 0

            vgt Eirik Aavitsland
            rouault Even Rouault
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