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  1. Qt
  2. QTBUG-56806

qmltest::item-grabber::test_endresult() fails on big endian architectures

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Details

    • Bug
    • Resolution: Unresolved
    • P3: Somewhat important
    • None
    • 5.7.1, 5.9.0, 5.12.0 Beta 2
    • GUI: OpenGL, QML: Declarative and Javascript Engine
    • None
    • Debian GNU/Linux ppc64 (happens also on powerpc and s390x)

    Description

      We get this failure on big endian architectures (such as powerpc and s390x) when running the qmltest:

      FAIL!  : qmltest::item-grabber::test_endresult() 'verify()' returned FALSE. ()
   Loc: [/«PKGBUILDDIR»/tests/auto/qmltest/itemgrabber/tst_itemgrabber.qml(47)]

      Line 47 is:

      verify(image.pixel(0, 0) === Qt.rgba(1, 0, 0, 1)); // Use verify because compare doesn't support colors (QTBUG-34878)

      Adding some debug warnings shows this:

      WARNING: qmltest::item-grabber::test_endresult_cache(row 0) got: #ffffff, expected: #ff0000
   Loc: [/home/mitya57/qtdeclarative-opensource-src-5.9.0/tests/auto/qmltest/itemgrabber/tst_itemgrabber.qml(94)]
FAIL!  : qmltest::item-grabber::test_endresult_cache(row 0) 'verify()' returned FALSE. ()
   Loc: [/home/mitya57/qtdeclarative-opensource-src-5.9.0/tests/auto/qmltest/itemgrabber/tst_itemgrabber.qml(95)]
WARNING: qmltest::item-grabber::test_endresult_cache(row 1) got: #ffffff, expected: #ff0000
   Loc: [/home/mitya57/qtdeclarative-opensource-src-5.9.0/tests/auto/qmltest/itemgrabber/tst_itemgrabber.qml(94)]
FAIL!  : qmltest::item-grabber::test_endresult_cache(row 1) 'verify()' returned FALSE. ()
   Loc: [/home/mitya57/qtdeclarative-opensource-src-5.9.0/tests/auto/qmltest/itemgrabber/tst_itemgrabber.qml(95)]

      See also the attached PNG file, which represents the image being tested. This definitely looks like an endianness issue to me.

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          depends on

          User Story - Created by Jira Software - do not edit or delete. Issue type for a user story. QTQAINFRA-4340 Add Big-endian to CI

          • Not Evaluated - Not yet evaluated/prioritized
          • Withdrawn
          For Gerrit Dashboard: QTBUG-56806
          # Subject Branch Project Status CR V
          244469,3 Fix image grab when XCB is rgb-swapping 5.12 qt/qtbase Status: MERGED +2 0

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              lagocs Laszlo Agocs
              mandriver Dmitry Shachnev
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              Dates

                Created:
                Updated:

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