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  1. Qt
  2. QTBUG-67601

[REG 5.9.4 -> 5.9.5] Rendering of transparent QML items broken on i.MX6

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Details

    • Bug
    • Resolution: Done
    • P1: Critical
    • 5.9.7, 5.12.0 Alpha
    • 5.9.5, 5.9.6, 5.11.0, 5.11.1
    • QPA: Wayland, Quick: Widget
    • None
    • i.MX6 using Linux / Wayland

      meta-qt5 (latest 5.9 branch and latest update to 5.11.1)

    Description

      Image, QQuickPaintedItem and maybe others are drawn opaque when they should be transparent.

      When testing the 5.9.5 RC from the meta-qt5 repository, we notice broken rendering of our QQuickWidget based application. It seems that, while z-order is preserved, Items are not transparent any more. For example, rendering a QML Image with a transparent PNG file as source will draw the background colour over previous items, instead of showing through.

      Qt 5.9.4 and before are working without issues.

      Attachments

        1. qtbug-67601-demo.tar.gz
          2 kB
        2. QuickView.jpg
          QuickView.jpg
          229 kB
        3. QuickWidget.jpg
          QuickWidget.jpg
          212 kB

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-68605 QtWayland client shows compositor background instead of a grey shadow

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-70242 Wayland rendering issues regression

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
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              johanhelsing Johan Helsing
              seek Bernhard Hartleb
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              Dates

                Created:
                Updated:
                Resolved:

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