From 8533c94a244b7ed14dcfaac69b512901fe10737e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tor=20Arne=20Vestb=C3=B8?= <tor.arne.vestbo@qt.io>
Date: Tue, 20 Dec 2016 14:28:23 +0100
Subject: [PATCH] macOS: Take DPR into account when creating CGContexts for a
 QPixmap

Missing logic when refactoring image manipulation methods into QtGui
in c52bb030907.

Task-number: QTBUG-57723
Change-Id: I7b55d4451d35faf5fd794daa0b80acbd712f30cd
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@qt.io>
---
 src/gui/painting/qcoregraphics.mm | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/gui/painting/qcoregraphics.mm b/src/gui/painting/qcoregraphics.mm
index 466b18d59be..804c40ecbb8 100644
--- a/src/gui/painting/qcoregraphics.mm
+++ b/src/gui/painting/qcoregraphics.mm
@@ -495,6 +495,8 @@ QMacCGContext::QMacCGContext(QPaintDevice *paintDevice) : context(0)
     context = CGBitmapContextCreate(image->bits(), image->width(), image->height(),
                                 8, image->bytesPerLine(), colorspace, flags);
     CGContextTranslateCTM(context, 0, image->height());
+    qreal devicePixelRatio = paintDevice->devicePixelRatioF();
+    CGContextScaleCTM(context, devicePixelRatio, devicePixelRatio);
     CGContextScaleCTM(context, 1, -1);
 }