Make sure all generated pixmaps are show at the proper pixel ratio

openlp/core/__init__.py

@@ -341,6 +341,7 @@ def main(args=None):
     application = OpenLP(qt_args)
     application.setOrganizationName('OpenLP')
     application.setOrganizationDomain('openlp.org')
+    application.setAttribute(QtCore.Qt.AA_UseHighDpiPixmaps, True)
     if args and args.portable:
         application.setApplicationName('OpenLPPortable')
         Settings.setDefaultFormat(Settings.IniFormat)

openlp/core/ui/listpreviewwidget.py

@@ -131,10 +131,14 @@ class ListPreviewWidget(QtWidgets.QTableWidget, RegistryProperties):
                 else:
                     label.setScaledContents(True)
                 if self.service_item.is_command():
-                    label.setPixmap(QtGui.QPixmap(frame['image']))
+                    pixmap = QtGui.QPixmap(frame['image'])
+                    pixmap.setDevicePixelRatio(label.devicePixelRatio())
+                    label.setPixmap(pixmap)
                 else:
                     image = self.image_manager.get_image(frame['path'], ImageSource.ImagePlugin)
-                    label.setPixmap(QtGui.QPixmap.fromImage(image))
+                    pixmap = QtGui.QPixmap.fromImage(image)
+                    pixmap.setDevicePixelRatio(label.devicePixelRatio())
+                    label.setPixmap(pixmap)
                 self.setCellWidget(frame_number, 0, label)
                 slide_height = width // self.screen_ratio
                 row += 1

openlp/core/ui/slidecontroller.py

@@ -1129,6 +1129,7 @@ class SlideController(DisplayController, RegistryProperties):
             QtCore.QTimer.singleShot(2.5, self.grab_maindisplay)
         else:
             self.slide_image = self.display.preview()
+            self.slide_image.setDevicePixelRatio(self.main_window.devicePixelRatio())
             self.slide_preview.setPixmap(self.slide_image)
         self.slide_count += 1
 
@@ -1139,6 +1140,7 @@ class SlideController(DisplayController, RegistryProperties):
         win_id = QtWidgets.QApplication.desktop().winId()
         rect = self.screens.current['size']
         win_image = QtGui.QScreen.grabWindow(win_id, rect.x(), rect.y(), rect.width(), rect.height())
+        win_image.setDevicePixelRatio(self.slide_preview.devicePixelRatio())
         self.slide_preview.setPixmap(win_image)
         self.slide_image = win_image
 

openlp/core/ui/themeform.py

@@ -193,6 +193,7 @@ class ThemeForm(QtWidgets.QWizard, Ui_ThemeWizard, RegistryProperties):
         if self.page(page_id) == self.preview_page:
             self.update_theme()
             frame = self.theme_manager.generate_image(self.theme)
+            frame.setDevicePixelRatio(self.devicePixelRatio())
             self.preview_box_label.setPixmap(frame)
             self.display_aspect_ratio = float(frame.width()) / frame.height()
             self.resizeEvent()

openlp/core/ui/themelayoutform.py

@@ -43,6 +43,7 @@ class ThemeLayoutForm(QtWidgets.QDialog, Ui_ThemeLayoutDialog):
         Run the Dialog with correct heading.
         """
         pixmap = image.scaledToHeight(400, QtCore.Qt.SmoothTransformation)
+        pixmap.setDevicePixelRatio(self.theme_display_label.devicePixelRatio())
         self.theme_display_label.setPixmap(pixmap)
         display_aspect_ratio = float(image.width()) / image.height()
         self.theme_display_label.setFixedSize(400, 400 / display_aspect_ratio)