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Diffstat (limited to 'src/gui/kernel/qplatformscreen.cpp')
| -rw-r--r-- | src/gui/kernel/qplatformscreen.cpp | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/gui/kernel/qplatformscreen.cpp b/src/gui/kernel/qplatformscreen.cpp index 9c5876550a..f3213bf5ea 100644 --- a/src/gui/kernel/qplatformscreen.cpp +++ b/src/gui/kernel/qplatformscreen.cpp @@ -193,6 +193,28 @@ QDpi QPlatformScreen::logicalDpi() const 25.4 * s.height() / ps.height()); } +// Helper function for accessing the platform screen logical dpi +// which accounts for QT_FONT_DPI. +QPair<qreal, qreal> QPlatformScreen::overrideDpi(const QPair<qreal, qreal> &in) +{ + static const int overrideDpi = qEnvironmentVariableIntValue("QT_FONT_DPI"); + return overrideDpi > 0 ? QDpi(overrideDpi, overrideDpi) : in; +} + +/*! + Reimplement to return the base logical DPI for the platform. This + DPI value should correspond to a standard-DPI (1x) display. The + default implementation returns 96. + + QtGui will use this value (together with logicalDpi) to compute + the scale factor when high-DPI scaling is enabled: + factor = logicalDPI / baseDPI +*/ +QDpi QPlatformScreen::logicalBaseDpi() const +{ + return QDpi(96, 96); +} + /*! Reimplement this function in subclass to return the device pixel ratio for the screen. This is the ratio between physical pixels and the |