From 6f632283d022aaf9d8e2bda81a5409aa36242d4d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?M=C3=A9ven=20Car?= <meven29@gmail.com>
Date: Sat, 19 Dec 2020 07:45:52 +0100
Subject: [PATCH] Allow to have HiDpi previews

BUG: 401170
---
 src/main.cpp                                       | 3 +++
 src/panels/information/informationpanelcontent.cpp | 4 ++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index ff726401ee..ba894ec38c 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -23,6 +23,7 @@
 #include <KLocalizedString>
 #include <Kdelibs4ConfigMigrator>
 #include <KConfigGui>
+#include <KIO/PreviewJob>
 
 #include <QApplication>
 #include <QCommandLineParser>
@@ -61,6 +62,8 @@ int main(int argc, char **argv)
     QApplication app(argc, argv);
     app.setWindowIcon(QIcon::fromTheme(QStringLiteral("system-file-manager"), app.windowIcon()));
 
+    KIO::PreviewJob::setDefaultDevicePixelRatio(app.devicePixelRatio());
+
     KCrash::initialize();
 
     Kdelibs4ConfigMigrator migrate(QStringLiteral("dolphin"));
diff --git a/src/panels/information/informationpanelcontent.cpp b/src/panels/information/informationpanelcontent.cpp
index d43b9f5205..98c0122437 100644
--- a/src/panels/information/informationpanelcontent.cpp
+++ b/src/panels/information/informationpanelcontent.cpp
@@ -394,8 +394,8 @@ void InformationPanelContent::showPreview(const KFileItem& item,
         // adds a play arrow
 
         // compute relative pixel positions
-        const int zeroX = static_cast<int>(p.width() / 2 - PLAY_ARROW_SIZE / 2 / devicePixelRatio());
-        const int zeroY = static_cast<int>(p.height() / 2 - PLAY_ARROW_SIZE / 2 / devicePixelRatio());
+        const int zeroX = static_cast<int>((p.width() / 2 - PLAY_ARROW_SIZE / 2) / pixmap.devicePixelRatio());
+        const int zeroY = static_cast<int>((p.height() / 2 - PLAY_ARROW_SIZE / 2) / pixmap.devicePixelRatio());
 
         QPolygon arrow;
         arrow << QPoint(zeroX, zeroY);