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  1. Qt
  2. QTBUG-44063

Fuzzy text on OS X with QGraphicsView and QOpenGLWidget viewport

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    Details

    • Type: Bug
    • Status: Need More Info
    • Priority: P2: Important
    • Resolution: Incomplete
    • Affects Version/s: 5.4.0
    • Fix Version/s: None
    • Component/s: GUI: OpenGL, GUI: Painting
    • Labels:
      None
    • Environment:
      Mac OSX
    • Platform/s:
      macOS

      Description

      With QT 5.4.0 it is no longer possible to set an OpenGL Widget as viewport of QGraphicsView and receiving good results.
      Text becomes very fuzzy when scaling GraphicsItems. Thin Lines are no longer fully visible.
      This effect also takes place with Qt Quick (see QTBUG-42861).
      This is a Mac OSX only issue. On Windows everything looks good.

      It seems that with Qt 5.4.0 rendering OpenGL Content has changed.
      There is no difference using QOpenGLWidget or QGLWidget.

      I've attached an example Project where the differences can be seen.
      When compiling it with Qt 5.3.2 everything looks good.

        Attachments

        1. Qt_5_4_0.png
          Qt_5_4_0.png
          216 kB
        2. Qt_5_3_2.png
          Qt_5_3_2.png
          208 kB
        3. OpenGL.zip
          10 kB

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              Assignee:
              lagocs Laszlo Agocs
              Reporter:
              phenze Pascal Henze
              Votes:
              1 Vote for this issue
              Watchers:
              6 Start watching this issue

                Dates

                Created:
                Updated:
                Resolved:

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