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xcb: fix coordinates of touch points

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Fix conversion from FP1616 to qreal.
Use 16-bit mask 0xFFFF instead of 8-bit mask 0xFF.

Change-Id: I0ee39b2e298b7ff7d7a67981925374d6a18f1474
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>
This commit is contained in:
Alexander Volkov 2014-09-01 17:35:35 +04:00 committed by Shawn Rutledge
parent eac2876d55
commit f721a85b1e
1 changed files with 1 additions and 1 deletions
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src/plugins/platforms/xcb/qxcbconnection_xi2.cpp
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@ -413,7 +413,7 @@ XInput2TouchDeviceData *QXcbConnection::touchDeviceForId(int id)
#if defined(XCB_USE_XINPUT21) || !defined(QT_NO_TABLETEVENT)
static qreal fixed1616ToReal(FP1616 val)
{
return (qreal(val >> 16)) + (val & 0xFF) / (qreal)0xFF;
return (qreal(val >> 16)) + (val & 0xFFFF) / (qreal)0xFFFF;
}
#endif // defined(XCB_USE_XINPUT21) || !defined(QT_NO_TABLETEVENT)