Merge "Merge remote-tracking branch 'origin/5.7' into 5.8" into refs/staging/5.8

1 files changed, 10 insertions, 2 deletions

diff --git a/src/quick/items/context2d/qquickcontext2dtexture.cpp b/src/quick/items/context2d/qquickcontext2dtexture.cpp
index ddecf7c3d4..4435c0c37b 100644
--- a/src/quick/items/context2d/qquickcontext2dtexture.cpp
+++ b/src/quick/items/context2d/qquickcontext2dtexture.cpp
@@ -548,6 +548,9 @@ QPaintDevice* QQuickContext2DFBOTexture::beginPainting()
 {
     QQuickContext2DTexture::beginPainting();
 
+    const qreal devicePixelRatio = (m_item && m_item->window()) ?
+        m_item->window()->effectiveDevicePixelRatio() : qApp->devicePixelRatio();
+
     if (m_canvasWindow.size().isEmpty()) {
         delete m_fbo;
         delete m_multisampledFbo;
@@ -562,7 +565,7 @@ QPaintDevice* QQuickContext2DFBOTexture::beginPainting()
         delete m_paint_device;
         m_paint_device = 0;
 
-        m_fboSize = npotAdjustedSize(m_canvasWindow.size());
+        m_fboSize = npotAdjustedSize(m_canvasWindow.size() * devicePixelRatio);
         m_canvasWindowChanged = false;
 
         if (doMultisampling()) {
@@ -600,6 +603,7 @@ QPaintDevice* QQuickContext2DFBOTexture::beginPainting()
         QOpenGLPaintDevice *gl_device = new QOpenGLPaintDevice(m_fbo->size());
         gl_device->setPaintFlipped(true);
         gl_device->setSize(m_fbo->size());
+        gl_device->setDevicePixelRatio(devicePixelRatio);
         m_paint_device = gl_device;
     }
 
@@ -705,8 +709,12 @@ QPaintDevice* QQuickContext2DImageTexture::beginPainting()
     if (m_canvasWindow.size().isEmpty())
         return 0;
 
+    const qreal devicePixelRatio = (m_item && m_item->window()) ?
+        m_item->window()->effectiveDevicePixelRatio() : qApp->devicePixelRatio();
+
     if (m_canvasWindowChanged) {
-        m_image = QImage(m_canvasWindow.size(), QImage::Format_ARGB32_Premultiplied);
+        m_image = QImage(m_canvasWindow.size() * devicePixelRatio, QImage::Format_ARGB32_Premultiplied);
+        m_image.setDevicePixelRatio(devicePixelRatio);
         m_image.fill(0x00000000);
         m_canvasWindowChanged = false;
     }