44 lines
1.9 KiB
Diff
44 lines
1.9 KiB
Diff
diff -up firefox-71.0/widget/gtk/nsWindow.cpp.1568569 firefox-71.0/widget/gtk/nsWindow.cpp
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--- firefox-71.0/widget/gtk/nsWindow.cpp.1568569 2019-11-26 10:51:08.303063138 +0100
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+++ firefox-71.0/widget/gtk/nsWindow.cpp 2019-11-26 10:54:28.428994823 +0100
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@@ -3348,6 +3348,8 @@ void nsWindow::OnWindowStateEvent(GtkWid
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return;
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}
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+ nsSizeMode lastSizeState = mSizeState;
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+
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if (aEvent->new_window_state & GDK_WINDOW_STATE_ICONIFIED) {
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LOG(("\tIconified\n"));
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mSizeState = nsSizeMode_Minimized;
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@@ -3379,6 +3381,18 @@ void nsWindow::OnWindowStateEvent(GtkWid
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mIsTiled = false;
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}
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+ // Fullscreen video playback may generate bogus alpha values which blends
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+ // with desktop background in fullscreen video playback (Bug 1568569).
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+ // As a workaround enable to draw mShell background in fullscreen mode
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+ // if we draw to mContainer.
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+ if (gtk_widget_get_has_window(GTK_WIDGET(mContainer))) {
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+ if (mSizeState == nsSizeMode_Fullscreen) {
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+ gtk_widget_set_app_paintable(mShell, FALSE);
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+ } else if (lastSizeState == nsSizeMode_Fullscreen) {
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+ gtk_widget_set_app_paintable(mShell, TRUE);
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+ }
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+ }
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+
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if (mWidgetListener) {
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mWidgetListener->SizeModeChanged(mSizeState);
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if (aEvent->changed_mask & GDK_WINDOW_STATE_FULLSCREEN) {
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@@ -3930,6 +3944,11 @@ nsresult nsWindow::Create(nsIWidget* aPa
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gtk_widget_add_events(eventWidget, kEvents);
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if (drawToContainer) {
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gtk_widget_add_events(mShell, GDK_PROPERTY_CHANGE_MASK);
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+ // Don't paint mShell background when we draw to mContainer.
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+ // Otherwise we see mShell backround to shine through
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+ // mContainer (Bug 1507608).
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+ // But it may also lead to various bugs where mContainer has unintended
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+ // transparent parts which blend with underlying desktop (Bug 1516224).
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gtk_widget_set_app_paintable(mShell, TRUE);
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}
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if (mTransparencyBitmapForTitlebar) {
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