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| author | Morten Johan Sørvig <morten.sorvig@qt.io> | 2019-09-24 13:18:42 +0200 |
|---|---|---|
| committer | Morten Johan Sørvig <morten.sorvig@qt.io> | 2019-09-24 14:41:45 +0200 |
| commit | 3bf066bdad5b4a3cdcd7b7c79985d2eef74b598a (patch) | |
| tree | 703b14dc96767ecdca0e4bf18609c012bc3273aa | |
| parent | cdcda09055c35b8faf08588a4bba5369571ce3c5 (diff) | |
High-DPI: Document new config options
Append to the existing list.
Change-Id: I7435847e3029a607c36fb99bcef9a54f11142b65
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
| -rw-r--r-- | doc/src/highdpi.qdoc | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/doc/src/highdpi.qdoc b/doc/src/highdpi.qdoc index 7658f024f..679b2310d 100644 --- a/doc/src/highdpi.qdoc +++ b/doc/src/highdpi.qdoc @@ -203,6 +203,18 @@ actual window system coordinates, regardless of environment variables. This attribute takes priority over Qt::AA_EnableHighDpiScaling. + \li The QT_ENABLE_HIGHDPI_SCALING environment variable, introduced in Qt 5.14, + enables automatic scaling based on the pixel density of the monitor. Replaces + QT_AUTO_SCREEN_SCALE_FACTOR. + + \li The QT_SCALE_FACTOR_ROUNDING_POLICY environment variable and + QGuiApplication::highDpiScaleFactorRoundingPolicy API, introduced in Qt 5.14, + makes it possible to control if and how the device pixel ratio should be rounded + to the nearest integer. This is relevant for configurations like Windows at + 150% scale. Possible values are \c{Round}, \c{Ceil}, \c{Floor}, \c{RoundPreferFloor}, + \c{PassThrough}. See the Qt::HighDpiScaleFactorRoundingPolicy enum documentation + for a full description of the options. + \li An experimental implementation of high-DPI scaling was introduced in Qt 5.4. It was enabled by the environment variable \c QT_DEVICE_PIXEL_RATIO, which could be set to a numerical scale factor or \c "auto". This variable is |