Changeset 56057 in vbox

Timestamp:

May 25, 2015 1:33:44 PM (10 years ago)

Author:

vboxsync

Message:

FE/Qt: Runtime UI: Scaling: Use the performance scaling (Qt::FastTransformation) for the cases with integer scale-factor.

File:

• trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIFrameBuffer.cpp (modified) (5 diffs)

trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIFrameBuffer.cpp

@@ -57 +57 @@
 #include <VBox/VBoxVideo3D.h>
 
+/* Other includes: */
+#include <math.h>
+
 #ifdef Q_WS_X11
 /* X11 includes: */
@@ -290 +293 @@
     void paintSeamless(QPaintEvent *pEvent);
 
-    /** Returns the transformation mode corresponding to the passed ScalingOptimizationType. */
-    static Qt::TransformationMode transformationMode(ScalingOptimizationType type);
+    /** Returns the transformation mode corresponding to the passed @a dScaleFactor and ScalingOptimizationType. */
+    static Qt::TransformationMode transformationMode(double dScaleFactor, ScalingOptimizationType type);
 
     /** Erases corresponding @a rect with @a painter. */
@@ -1343 +1346 @@
         /* And scaling the image to predefined scaled-factor: */
         scaledImage = scaledImage.scaled(m_scaledSize, Qt::IgnoreAspectRatio,
-                                         transformationMode(scalingOptimizationType()));
+                                         transformationMode(m_dScaleFactor, scalingOptimizationType()));
     }
     /* Finally we are choosing image to paint from: */
@@ -1384 +1387 @@
         /* And scaling the image to predefined scaled-factor: */
         scaledImage = scaledImage.scaled(m_scaledSize, Qt::IgnoreAspectRatio,
-                                         transformationMode(scalingOptimizationType()));
+                                         transformationMode(m_dScaleFactor, scalingOptimizationType()));
     }
     /* Finally we are choosing image to paint from: */
@@ -1440 +1443 @@
 
 /* static */
-Qt::TransformationMode UIFrameBufferPrivate::transformationMode(ScalingOptimizationType type)
+Qt::TransformationMode UIFrameBufferPrivate::transformationMode(double dScaleFactor, ScalingOptimizationType type)
 {
     switch (type)
     {
+        /* Check if optimization type is forced to be 'Performance': */
         case ScalingOptimizationType_Performance: return Qt::FastTransformation;
         default: break;
     }
-    return Qt::SmoothTransformation;
+    /* For integer-scaling we are choosing the 'Performance' optimization type ourselves: */
+    return floor(dScaleFactor) == dScaleFactor ? Qt::FastTransformation : Qt::SmoothTransformation;
 }