Add devicePixelRatio to QPaintedTextureImagePrivate

Cannot add new APIs in a patch release so add it only to the
already exported private class.

Task-number: QTBUG-68718
Change-Id: I01b0ceb4ad1a5a7f27c7335a91a25cd39e9a28cd
Reviewed-by: Christian Stromme <christian.stromme@qt.io>

2 files changed, 8 insertions, 1 deletions

diff --git a/src/render/texture/qpaintedtextureimage.cpp b/src/render/texture/qpaintedtextureimage.cpp
index 8d2dd1436..6e220f340 100644
--- a/src/render/texture/qpaintedtextureimage.cpp
+++ b/src/render/texture/qpaintedtextureimage.cpp
@@ -69,6 +69,7 @@ namespace Qt3DRender {
 
 QPaintedTextureImagePrivate::QPaintedTextureImagePrivate()
     : m_imageSize(256,256)
+    , m_devicePixelRatio(1.0)
     , m_generation(0)
 {
 }
@@ -80,8 +81,13 @@ QPaintedTextureImagePrivate::~QPaintedTextureImagePrivate()
 void QPaintedTextureImagePrivate::repaint()
 {
     // create or re-allocate QImage with current size
-    if (m_image.isNull() || (m_image->size() != m_imageSize))
+    if (m_image.isNull()
+            || m_image->size() != m_imageSize
+            || m_image->devicePixelRatio() != m_devicePixelRatio)
+    {
         m_image.reset(new QImage(m_imageSize, QImage::Format_RGBA8888));
+        m_image->setDevicePixelRatio(m_devicePixelRatio);
+    }
 
     QPainter painter(m_image.data());
     q_func()->paint(&painter);
diff --git a/src/render/texture/qpaintedtextureimage_p.h b/src/render/texture/qpaintedtextureimage_p.h
index 93705d96e..4e554f1c1 100644
--- a/src/render/texture/qpaintedtextureimage_p.h
+++ b/src/render/texture/qpaintedtextureimage_p.h
@@ -72,6 +72,7 @@ public:
     Q_DECLARE_PUBLIC(QPaintedTextureImage)
 
     QSize m_imageSize;
+    qreal m_devicePixelRatio;
     QScopedPointer<QImage> m_image;
     QTextureImageDataGeneratorPtr m_currentGenerator;