CSSTUDIO-1905 Enable caching and set the property "CacheHint" to "CacheHint.SCALE" on the "Picture" widget. This prevents excessive VRAM usage when using D3D graphics for running Phoebus under Windows when zooming in.

Author: abrahamwolk

app/display/representation-javafx/src/main/java/org/csstudio/display/builder/representation/javafx/widgets/PictureRepresentation.java

@@ -11,6 +11,7 @@
 
 import java.util.logging.Level;
 
+import javafx.scene.CacheHint;
 import org.csstudio.display.builder.model.DirtyFlag;
 import org.csstudio.display.builder.model.DisplayModel;
 import org.csstudio.display.builder.model.UntypedWidgetPropertyListener;
@@ -56,6 +57,8 @@ public ImageView createJFXNode() throws Exception
     {
         final ImageView iv = new ImageView();
         iv.setSmooth(true);
+        iv.setCache(true);
+        iv.setCacheHint(CacheHint.SCALE);
         iv.getTransforms().addAll(translate, rotation);
         return iv;
     }