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  1. Qt
  2. QTBUG-91678

Text may overlapped printing on Linux

    XMLWordPrintable

    Details

    • Type: Bug
    • Status: Reported
    • Priority: P2: Important
    • Resolution: Unresolved
    • Affects Version/s: 5.12.10, 5.15.2, 6.0.1
    • Fix Version/s: None
    • Component/s: GUI: Font handling
    • Labels:
      None
    • Platform/s:
      Linux/X11

      Description

      For some fonts with sub glyphs, the QFontEngineFT::getUnscaledGlyph may get unwanted metrics for some glyphs, this cause text overlapped when printing on Linux platform.

      See the below code for example:

       

      		QFont font("DFKai-SB", 32);
      		painter.setFont(font);
      
      		QRect rect(0, 0, dev->width(), dev->height());
      		painter.drawText(rect, Qt::AlignCenter, QString::fromUtf16(u"校園"));
      

       

      When printing or uses QPdfWriter as QPaintDevice, the 校園 overlapped.

      I have no idea how to fix the FT_Load_Glyph(face, glyph, FT_LOAD_NO_BITMAP) called in QFontEngineFT::getUnscaledGlyph.

      If you use fontforge open the pdf file, you will see the "園" position not place center compare on the origin font.

       

       

        Attachments

        1. fontforge.png
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        2. paint.png
          paint.png
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        3. pdf.png
          pdf.png
          6 kB
        4. qpdf.zip
          1 kB
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          Activity

            People

            Assignee:
            esabraha Eskil Abrahamsen Blomfeldt
            Reporter:
            timxx Weitian Leung
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            0 Vote for this issue
            Watchers:
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              Dates

              Created:
              Updated:

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