From e08a8fc3568730524a1d7f7104239cf0225065dc Mon Sep 17 00:00:00 2001
From: Matt Gajownik <matt@obsproject.com>
Date: Sat, 28 Nov 2020 11:08:11 +1100
Subject: [PATCH] UI: Don't round non-integer High DPI scale

This fixes an issue on Windows where loading on a
150% scale display renders OBS windows at 200%.

Reference: https://doc.qt.io/qt-5/qguiapplication.html#setHighDpiScaleFactorRoundingPolicy
---
 UI/obs-app.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/UI/obs-app.cpp b/UI/obs-app.cpp
index ab7ee45ec..5735417b9 100644
--- a/UI/obs-app.cpp
+++ b/UI/obs-app.cpp
@@ -1932,6 +1932,10 @@ static int run_program(fstream &logFile, int argc, char *argv[])
 #if (QT_VERSION >= QT_VERSION_CHECK(5, 11, 0))
 	QGuiApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
 #endif
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
+	QGuiApplication::setHighDpiScaleFactorRoundingPolicy(
+		Qt::HighDpiScaleFactorRoundingPolicy::PassThrough);
+#endif
 
 #if !defined(_WIN32) && !defined(__APPLE__) && BROWSER_AVAILABLE
 	setenv("QT_NO_GLIB", "1", true);