Add separate option for smooth scaling in XRender mode.

It's slow (software scaling), so it's disabled by default.

svn path=/trunk/KDE/kdebase/workspace/; revision=715200

kcmkwin/kwincompositing/advanced.cpp

@@ -62,6 +62,7 @@ void KWinAdvancedCompositingOptions::changed()
 void KWinAdvancedCompositingOptions::compositingModeChanged()
 {
     ui.glGroup->setEnabled(ui.compositingType->currentIndex() == 0);
+    ui.xrenderGroup->setEnabled(ui.compositingType->currentIndex() == 1);
 }
 
 void KWinAdvancedCompositingOptions::showConfirmDialog()
@@ -89,11 +90,16 @@ void KWinAdvancedCompositingOptions::load()
     KConfigGroup config(mKWinConfig, "Compositing");
     QString backend = config.readEntry("Backend", "OpenGL");
     ui.compositingType->setCurrentIndex((backend == "XRender") ? 1 : 0);
+
     QString glMode = config.readEntry("GLMode", "TFP");
     ui.glMode->setCurrentIndex((glMode == "TFP") ? 0 : ((glMode == "SHM") ? 1 : 2));
     ui.glTextureFilter->setCurrentIndex(config.readEntry("GLTextureFilter", 1));
     ui.glDirect->setChecked(config.readEntry("GLDirect", mDefaultPrefs->enableDirectRendering()));
     ui.glVSync->setChecked(config.readEntry("GLVSync", mDefaultPrefs->enableVSync()));
+
+    ui.xrenderSmoothScale->setChecked(config.readEntry("XRenderSmoothScale", false));
+
+    compositingModeChanged();
 }
 
 void KWinAdvancedCompositingOptions::save()
@@ -108,11 +114,14 @@ void KWinAdvancedCompositingOptions::save()
 
     config.writeEntry("Backend", (ui.compositingType->currentIndex() == 0) ? "OpenGL" : "XRender");
     QString glModes[] = { "TFP", "SHM", "Fallback" };
+
     config.writeEntry("GLMode", glModes[ui.glMode->currentIndex()]);
     config.writeEntry("GLTextureFilter", ui.glTextureFilter->currentIndex());
     config.writeEntry("GLDirect", ui.glDirect->isChecked());
     config.writeEntry("GLVSync", ui.glVSync->isChecked());
 
+    config.writeEntry("XRenderSmoothScale", ui.xrenderSmoothScale->isChecked());
+
     enableButtonApply(false);
 
     reinitKWinCompositing();

kcmkwin/kwincompositing/advanced.ui

@@ -118,6 +118,22 @@
      </layout>
     </widget>
    </item>
+   <item>
+    <widget class="QGroupBox" name="xrenderGroup" >
+     <property name="title" >
+      <string>XRender options</string>
+     </property>
+     <layout class="QVBoxLayout" >
+      <item>
+       <widget class="QCheckBox" name="xrenderSmoothScale" >
+        <property name="text" >
+         <string>Smooth scaling (slower)</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
    <item>
     <spacer>
      <property name="orientation" >

options.cpp

@@ -226,6 +226,8 @@ void Options::reloadCompositingSettings(const CompositingPrefs& prefs)
     glDirect = config.readEntry("GLDirect", prefs.enableDirectRendering() );
     glVSync = config.readEntry("GLVSync", prefs.enableVSync() );
     smoothScale = qBound( -1, config.readEntry( "GLTextureFilter", -1 ), 2 );
+
+    xrenderSmoothScale = config.readEntry("XRenderSmoothScale", false );
     }
 
 

options.h

@@ -297,9 +297,12 @@ class Options : public KDecorationOptions
         HiddenPreviews hiddenPreviews;
         
         uint refreshRate;
+        // This is for OpenGL mode
         int smoothScale; // 0 = no, 1 = yes when transformed,
                          // 2 = try trilinear when transformed; else 1,
                          // -1 = auto
+        // This is for XRender mode
+        bool xrenderSmoothScale;
         
         enum GLMode { GLTFP, GLSHM, GLFallback };
         GLMode glMode;

scene_xrender.cpp

@@ -453,7 +453,7 @@ void SceneXrender::Window::performPaint( int mask, QRegion region, WindowPaintDa
     if( pic == None ) // The render format can be null for GL and/or Xv visuals
         return;
     // set picture filter
-    if( options->smoothScale > 0 ) // only when forced, it's slow
+    if( options->xrenderSmoothScale ) // only when forced, it's slow
         {
         if( mask & PAINT_WINDOW_TRANSFORMED )
             filter = ImageFilterGood;