From 83470288715e925334cb24292630c7ff13a038da Mon Sep 17 00:00:00 2001
From: Gary Wang <wzc782970009@gmail.com>
Date: Thu, 6 Oct 2022 14:24:11 +0800
Subject: [PATCH] fix: blurry when raster image scaled down

---
 app/graphicsscene.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/app/graphicsscene.cpp b/app/graphicsscene.cpp
index 01e5686..bc1064a 100644
--- a/app/graphicsscene.cpp
+++ b/app/graphicsscene.cpp
@@ -29,8 +29,9 @@ public:
         if (qFuzzyCompare(scaleHint, m_cachedScaleHint)) return m_cachedPixmap;
         QSizeF resizedScale(boundingRect().size());
         resizedScale *= scaleHint;
-        m_cachedPixmap = pixmap().scaled(
-             resizedScale.toSize(),
+        QPixmap && sourcePixmap = pixmap();
+        m_cachedPixmap = sourcePixmap.scaled(
+             resizedScale.toSize() * sourcePixmap.devicePixelRatioF(),
              Qt::KeepAspectRatio,
              Qt::SmoothTransformation);
         m_cachedScaleHint = scaleHint;