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  1. Qt
  2. QTBUG-63163

QImage.convertToFormat fails to convert from RGB888 to Mono

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P3: Somewhat important
    • Resolution: Done
    • Affects Version/s: 5.7.1
    • Fix Version/s: 5.9.2
    • Labels:
      None
    • Environment:
      I use Qt5.7.1 on 64-bit Fedora Linux.

      Description

      The method QImage::convertToFormat() fails to convert an image from RGB888 to Mono. The following code returns a Null image.

      // image is a QImage in format RGB888QVector<QRgb> colors(2);
      image.convertToFormat(QImage::Format_Mono, colors)T

      The conversion does work as expected if I do not specify a color vector. Also, the conversion does work as expected if the image is in format RGB32 rather than RGB888. I attach a minimal test case

        Attachments

        1. testcase.tbz
          490 kB
          Stefan Kebekus
        For Gerrit Dashboard: QTBUG-63163
        # Subject Branch Project Status CR V

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            People

            Assignee:
            allan.jensen Allan Sandfeld Jensen
            Reporter:
            skebekus Stefan Kebekus
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              Dates

              Created:
              Updated:
              Resolved:

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