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| author | Morten Johan Sørvig <morten.sorvig@theqtcompany.com> | 2015-06-19 16:40:39 +0200 |
|---|---|---|
| committer | Simon Hausmann <simon.hausmann@theqtcompany.com> | 2015-07-30 04:04:01 +0000 |
| commit | dcd2debe625841ee8cba6d13a56cde7613c40358 (patch) | |
| tree | d1d1e6c98d9cc5d81f29a389721acca6a9f7d150 /src/gui/painting/qpaintdevice.qdoc | |
| parent | 0167ace5f0a7e5ad80ce95efc99c86235bcf8c0d (diff) | |
Enable non-integer device pixel ratio
Work around QPaintDevice::metric's int return type
by adding a new metric that returns a scaled devicePixelRatio.
Choose a scale factor that gives us more than enough
range.
The QPaintDevice::devicePixelRatio() convenience accessor
is public API and can unfortunately not be changed
to return a qreal. Add devicePixelRatioF() which
returns the (unscaled) devicePixelRatio.
Change all call sites of QPaintDevice::devicePixelRatio()
to use QPainDevice::devicePixelRatioF().
Task-number: QTBUG-46615
Change-Id: I97ec4000fe379b7ff5e1624a871ae2512790aad9
Reviewed-by: Paul Olav Tvete <paul.tvete@theqtcompany.com>
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
Diffstat (limited to 'src/gui/painting/qpaintdevice.qdoc')
| -rw-r--r-- | src/gui/painting/qpaintdevice.qdoc | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/gui/painting/qpaintdevice.qdoc b/src/gui/painting/qpaintdevice.qdoc index 8db65af18e..a83acdd21a 100644 --- a/src/gui/painting/qpaintdevice.qdoc +++ b/src/gui/painting/qpaintdevice.qdoc @@ -286,3 +286,24 @@ Common values are 1 for normal-dpi displays and 2 for high-dpi "retina" displays. */ + +/*! + \fn qreal QPaintDevice::devicePixelRatioF() const + + Returns the device pixel ratio for the device as a floating point number. + + \since 5.6 +*/ + +/*! + \fn qreal QPaintDevice::devicePixelRatioFScale() + + \internal + + Returns the scaling factor used for \c PdmDevicePixelRatioScaled. Classes + that are not QPaintDevice subclasses are implementing metric(), and need to + access this constant. Since it's a qreal, it cannot be an enum, and an inline + function is more efficient than a static member variable. + + \since 5.6 +*/ |