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  1. Qt
  2. QTBUG-59207

Cant display large images with > 15 MP with the GL paint engine

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Details

    • 800cd53c7e7c34571582d463c3f40de4df908818

    Description

      QGraphicsView is not able to display large images with more than 15 mega pixels when OpenGL is set as its Viewport:

      setViewport(new QOpenGLWidget);

      In case i set the pixmap of the Graphicsview using a large image, the resulting area appears just black.

      I used 23MP RGB image with dimensions of 7786x3000 pixels.

      http://4k.com/wp-content/uploads/2014/06/4k-image-santiago.jpg

      When i remove the setViewport(new QOpenGLWidget) part, then the image is correctly displayed.

      Attachments

        1. 13MP.jpg
          13MP.jpg
          6.96 MB
        2. 15MP.jpg
          15MP.jpg
          7.58 MB
        3. 17MP.jpg
          17MP.jpg
          8.39 MB
        4. 23MP.jpg
          23MP.jpg
          9.83 MB
        5. FHD.jpg
          FHD.jpg
          1.25 MB
        6. LargeImagesBug.zip
          4 kB
        7. qtdiag.txt
          6 kB

        Issue Links

          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-69254 Using QGraphicsView::render() and QPainter to render the graphicsview's viewport onto a QOpenGLPaintDevice fails if the scene consists of a large image

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Closed
          For Gerrit Dashboard: QTBUG-59207
          # Subject Branch Project Status CR V
          187328,3 Avoid losing large textures in GL texture cache 5.9 qt/qtbase Status: DEFERRED 0 0
          244738,2 Increase QOpenGLTextureCache max size 5.12 qt/qtbase Status: MERGED +2 0

          Activity

            People

              lagocs Laszlo Agocs
              tompollok Thomas Pollok
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              Dates

                Created:
                Updated:
                Resolved:

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