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  1. Qt
  2. QTBUG-49535

Drawing a lot of glyphs instantiating QFont in a loop over unicode characters up to 0x8000 and point size eventually fails and application crashes

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Details

    • e109b8a0f3c89c595f0da689e7ee847130e2ee47

    Description

      With simple loop that draws single characters (with single font) in different sizes to QImage eventaully starts to print following warnings and eventually runs into an assert in qwindowsnativeimage.cpp or just crashes.

      <ommited pages and pages of this spam>
QWindowsFontEngine::QWindowsFontEngine: CreateFontIndirect failed for family 'Wingdings' ()
QWindowsFontEngine::QWindowsFontEngine: CreateFontIndirect failed for family 'Yu Gothic' ()
QWindowsFontEngine::QWindowsFontEngine: CreateFontIndirect failed for family 'Yu Gothic Light' ()
QWindowsFontEngine::QWindowsFontEngine: CreateFontIndirect failed for family 'Yu Gothic Medium' ()
QWindowsFontEngine::QWindowsFontEngine: CreateFontIndirect failed for family 'Yu Gothic UI' ()
QWindowsFontEngine::QWindowsFontEngine: CreateFontIndirect failed for family 'Yu Gothic UI Light' ()
QWindowsFontEngine::QWindowsFontEngine: CreateFontIndirect failed for family 'Yu Gothic UI Semibold' ()
QWindowsFontEngine::QWindowsFontEngine: CreateFontIndirect failed for family 'Yu Gothic UI Semilight' ()
QWindowsFontEngine::QWindowsFontEngine: CreateFontIndirect failed for family 'Yu Mincho' ()
QWindowsFontEngine::QWindowsFontEngine: CreateFontIndirect failed for family 'Yu Mincho Demibold' ()
QWindowsFontEngine::QWindowsFontEngine: CreateFontIndirect failed for family 'Yu Mincho Light' ()
ASSERT: "hdc" in file qwindowsnativeimage.cpp, line 66
createDIB: CreateDIBSection failed.
The program has unexpectedly finished.

      Attachments

        1. qtbug49535_font_diag.diff
          11 kB
        2. qtbug49535_fontmetrics_diag.diff
          1 kB
        3. qtbug49535.zip
          1 kB
        4. QTBUG-49535.zip
          0.9 kB
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            andysh Andy Shaw
            poikelin Joni Poikelin
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            Dates

              Created:
              Updated:
              Resolved:

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