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  1. Qt
  2. QTBUG-135867

[REG 6.9] Linux/XCB: Possible holes in transparent windows on HiDPI

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Details

    • Bug
    • Resolution: Fixed
    • P1: Critical
    • 6.9.1, 6.10.0 Beta3
    • 6.9.0
    • QPA: X11/XCB
    • None
    • Linux/X11
    • 11c171553 (dev), e4e88d913 (6.9)

    Description

      Attached TransparencyTest_v2.tar.gz program to reproduce the issue. Run this program on X11 with DPR > 1.0. See video: TransparencyTest.mp4

      Attached TransparencyTest_v3.tar.gz - easy way to reproduce the issue:

      Reverting this: https://codereview.qt-project.org/c/qt/qtbase/+/575758 fixes the issue.

      Attachments

        1. Zrzut ekranu_20250415_174050.png
          Zrzut ekranu_20250415_174050.png
          32 kB
        2. TransparencyTest.tar.gz
          0.9 kB
        3. TransparencyTest.mp4
          15 kB
        4. TransparencyTest_v3.tar.gz
          0.7 kB
        5. TransparencyTest_v2.tar.gz
          0.9 kB
        For Gerrit Dashboard: QTBUG-135867
        # Subject Branch Project Status CR V
        641155,3 Revert "XCB: set devicePixelRatio on backing store QImages" dev qt/qtbase Status: MERGED +2 0
        643082,2 Revert "XCB: set devicePixelRatio on backing store QImages" 6.9 qt/qtbase Status: MERGED +2 0

        Activity

          People

            mitch_curtis Mitch Curtis
            zaps166 Błażej Szczygieł
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            Dates

              Created:
              Updated:
              Resolved:

              Gerrit Reviews

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