From da446d0d1578cd7e3041fe9e3c9bf5fbb23782d7 Mon Sep 17 00:00:00 2001
From: Alessandro Portale <alessandro.portale@qt.io>
Date: Wed, 20 Jul 2022 12:25:37 +0200
Subject: [PATCH] MarketPlace: Use HighDpi resolution for thumbnails

Let's create the thumbnail in the highest possible resolution for better
visual quality.

Change-Id: I35f67829ed6232cd3a139161e5695661b3adf271
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Christian Stenger <christian.stenger@qt.io>
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
---
 src/plugins/marketplace/productlistmodel.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/plugins/marketplace/productlistmodel.cpp b/src/plugins/marketplace/productlistmodel.cpp
index 511ee65836c..9ea421395d6 100644
--- a/src/plugins/marketplace/productlistmodel.cpp
+++ b/src/plugins/marketplace/productlistmodel.cpp
@@ -32,6 +32,7 @@
 #include <utils/networkaccessmanager.h>
 #include <utils/qtcassert.h>
 
+#include <QApplication>
 #include <QDesktopServices>
 #include <QFileInfo>
 #include <QJsonArray>
@@ -353,8 +354,11 @@ void SectionedProducts::onImageDownloadFinished(QNetworkReply *reply)
         const QString imageFormat = QFileInfo(imageUrl.fileName()).suffix();
         if (pixmap.loadFromData(data, imageFormat.toLatin1())) {
             const QString url = imageUrl.toString();
-            QPixmapCache::insert(url, pixmap.scaled(ProductListModel::defaultImageSize,
-                                                    Qt::KeepAspectRatio, Qt::SmoothTransformation));
+            const int dpr = qApp->devicePixelRatio();
+            pixmap = pixmap.scaled(ProductListModel::defaultImageSize * dpr,
+                                   Qt::KeepAspectRatio, Qt::SmoothTransformation);
+            pixmap.setDevicePixelRatio(dpr);
+            QPixmapCache::insert(url, pixmap);
             for (ProductListModel *model : qAsConst(m_productModels))
                 model->updateModelIndexesForUrl(url);
         }