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Fix Qt over VNC with broken VisualInfo

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It appears some VNC servers reports incorrect masks in their visuals.
This patch recognizes this unlikely set of masks and interprets it as
RGB16 which VNC expects.

Task-number: QTBUG-44147
Change-Id: Ia374edcd5f0a5ce0188157ac1d328f888cfa260c
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>
Reviewed-by: Laszlo Agocs <laszlo.agocs@theqtcompany.com>
This commit is contained in:
Allan Sandfeld Jensen 2015-01-27 16:36:10 +01:00 committed by Jani Heikkinen
parent 012a7ab912
commit 8e0f56280a
1 changed files with 12 additions and 0 deletions
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12
src/plugins/platforms/xcb/qxcbwindow.cpp
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@ -215,6 +215,18 @@ static inline QImage::Format imageFormatForVisual(int depth, quint32 red_mask, q
break;
}
qWarning("Unsupported screen format: depth: %d, red_mask: %x, blue_mask: %x", depth, red_mask, blue_mask);
switch (depth) {
case 24:
qWarning("Using RGB32 fallback, if this works your X11 server is reporting a bad screen format.");
return QImage::Format_RGB32;
case 16:
qWarning("Using RGB16 fallback, if this works your X11 server is reporting a bad screen format.");
return QImage::Format_RGB16;
default:
break;
}
return QImage::Format_Invalid;
}