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libqt5-qtbase.16533
0002-xcb-Use-the-screen-s-physical-DPI-as-logic...
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File 0002-xcb-Use-the-screen-s-physical-DPI-as-logical-DPI-unl.patch of Package libqt5-qtbase.16533
From 267ab09b87dd7e2ae7dd3e85a76398506e7f1ae9 Mon Sep 17 00:00:00 2001 From: Fabian Vogt <fabian@ritter-vogt.de> Date: Wed, 25 Apr 2018 18:34:01 +0200 Subject: [PATCH 2/2] xcb: Use the screen's physical DPI as logical DPI, unless overwritten The size of the virtual screen is most of the time meaningless, as X fakes it to result in 96 DPI, irregardless of the actual monitor DPI. This results in wrong font rendering on non-96 DPI monitors. Task-number: QTBUG-67928 --- src/plugins/platforms/xcb/qxcbscreen.cpp | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) Index: qtbase-opensource-src-5.9.6/src/plugins/platforms/xcb/qxcbscreen.cpp =================================================================== --- qtbase-opensource-src-5.9.6.orig/src/plugins/platforms/xcb/qxcbscreen.cpp +++ qtbase-opensource-src-5.9.6/src/plugins/platforms/xcb/qxcbscreen.cpp @@ -471,7 +471,15 @@ QDpi QXcbScreen::logicalDpi() const if (m_forcedDpi > 0) { return QDpi(m_forcedDpi, m_forcedDpi); } - return virtualDpi(); + + // By default, X fakes the virtual size to be 96 dpi (+-rounding), + // so if it's different the user overwrote it. + if (qRound(virtualDpi().first) != 96 || + qRound(virtualDpi().second) != 96) { + return virtualDpi(); + } + + return QDpi(m_pixelDensity * 96, m_pixelDensity * 96); } qreal QXcbScreen::pixelDensity() const
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