From 32a93b483dba6435d514d820c151ad0325e3854d Mon Sep 17 00:00:00 2001 From: Eskil Abrahamsen Blomfeldt Date: Tue, 9 Nov 2021 13:23:41 +0100 Subject: Fix missing update when toggling client-side decorations When CSD is toggled while a window is showing, it would change the size and recreate the buffers, but since the widget area remained the same size, we would not trigger a redraw. The result was that when you got any update to the window, it would redraw the widgets that had changed, and the rest would be transparent. Since this is a fairly specialized case, we fix it the simple way, by just issuing an extra update when it happens. This also required an update to the surface test, since there is an additional buffer commit in the beginning of the sequence now. Fixes: QTBUG-95032 Change-Id: Ic4bdb9c66a2ea76546926dd622f2d2dac5dce10c Reviewed-by: Qt CI Bot Reviewed-by: Liang Qi (cherry picked from commit af7b60ade5c4be81cbc58eb18307c017d5594071) Reviewed-by: Qt Cherry-pick Bot --- src/client/qwaylandwindow.cpp | 7 +++++++ tests/auto/client/surface/tst_surface.cpp | 4 ++++ 2 files changed, 11 insertions(+) diff --git a/src/client/qwaylandwindow.cpp b/src/client/qwaylandwindow.cpp index 6033f6129..14fbe9951 100644 --- a/src/client/qwaylandwindow.cpp +++ b/src/client/qwaylandwindow.cpp @@ -868,6 +868,13 @@ bool QWaylandWindow::createDecoration() subsurf->set_position(pos.x() + m.left(), pos.y() + m.top()); } sendExposeEvent(QRect(QPoint(), geometry().size())); + + // This is a special case where the buffer is recreated, but since + // the content rect remains the same, the widgets remain the same + // size and are not redrawn, leaving the new buffer empty. As a simple + // work-around, we trigger a full extra update whenever the client-side + // window decorations are toggled while the window is showing. + window()->requestUpdate(); } return mWindowDecoration; diff --git a/tests/auto/client/surface/tst_surface.cpp b/tests/auto/client/surface/tst_surface.cpp index 95e4e6098..60c672ce7 100644 --- a/tests/auto/client/surface/tst_surface.cpp +++ b/tests/auto/client/surface/tst_surface.cpp @@ -129,6 +129,10 @@ void tst_surface::waitForFrameCallbackGl() // Make sure we follow frame callbacks for some frames for (int i = 0; i < 5; ++i) { xdgPingAndWaitForPong(); // Make sure things have happened on the client + if (!qEnvironmentVariableIntValue("QT_WAYLAND_DISABLE_WINDOWDECORATION") && i == 0) { + QCOMPARE(bufferSpy.count(), 1); + bufferSpy.removeFirst(); + } exec([&] { QVERIFY(bufferSpy.empty()); // Make sure no extra buffers have arrived QVERIFY(!xdgToplevel()->surface()->m_waitingFrameCallbacks.empty()); -- cgit v1.2.3