Allow the Amarok OSD to use true transparency if it is available

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/amarok@1247185 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

amarok/src/Options5.ui

@@ -517,6 +517,7 @@
 <Q_SLOTS>
     <slot access="protected">slotPositionChanged()</slot>
     <slot access="protected">useCustomColorsToggled( bool on )</slot>
+    <slot access="protected">useFakeTransparencyToggled( bool on )</slot>
 </Q_SLOTS>
 <functions>
     <function access="private" specifier="non virtual">init()</function>

amarok/src/Options5.ui.h

@@ -25,6 +25,7 @@ email                : fh@ez.no
 
 #include "amarokconfig.h"
 #include <klocale.h>
+#include <kapplication.h>
 #include "qstringx.h"
 #include <tqtooltip.h>
 
@@ -47,6 +48,8 @@ void Options5::init()
              m_pOSDPreview,               TQT_SLOT( setTextColor(const TQColor&) ) );
     connect( kcfg_OsdUseCustomColors,     TQT_SIGNAL( toggled(bool) ),
              this,                        TQT_SLOT( useCustomColorsToggled(bool) ) );
+    connect( kcfg_OsdUseFakeTranslucency, TQT_SIGNAL( toggled(bool) ),
+             this,                        TQT_SLOT( useFakeTransparencyToggled(bool) ) );
     connect( kcfg_OsdBackgroundColor,     TQT_SIGNAL( changed(const TQColor&) ),
              m_pOSDPreview,               TQT_SLOT( setBackgroundColor(const TQColor&) ) );
     connect( kcfg_OsdFont,                TQT_SIGNAL( fontSelected(const TQFont&) ),
@@ -113,6 +116,7 @@ void
 Options5::showEvent( TQShowEvent* )
 {
     useCustomColorsToggled( kcfg_OsdUseCustomColors->isChecked() );
+    useFakeTransparencyToggled( kcfg_OsdUseFakeTranslucency->isChecked() );
 
     m_pOSDPreview->setFont( kcfg_OsdFont->font() );
     m_pOSDPreview->setScreen( kcfg_OsdScreen->currentItem() );
@@ -124,3 +128,12 @@ Options5::useCustomColorsToggled( bool on )
 {
     m_pOSDPreview->setUseCustomColors( on, kcfg_OsdTextColor->color(), kcfg_OsdBackgroundColor->color() );
 }
+
+void
+Options5::useFakeTransparencyToggled( bool on )
+{
+    if (kapp->isX11CompositionAvailable())
+        m_pOSDPreview->setTranslucency( on );
+    else
+        m_pOSDPreview->setTranslucency( false );
+}

amarok/src/app.cpp

@@ -120,12 +120,12 @@ appleEventProcessor(const AppleEvent *ae, AppleEvent *, long /*handlerRefCon*/)
 LIBAMAROK_EXPORT KAboutData aboutData( "amarok",
     I18N_NOOP( "Amarok" ), APP_VERSION,
     I18N_NOOP( "The audio player for KDE" ), KAboutData::License_GPL,
-    I18N_NOOP( "(C) 2002-2003, Mark Kretschmann\n(C) 2003-2007, The Amarok Development Squad" ),
+    I18N_NOOP( "(C) 2002-2003, Mark Kretschmann\n(C) 2003-2007, The Amarok Development Squad\n(C) 2007-2011, The Trinity Desktop Project" ),
     I18N_NOOP( "IRC:\nirc.freenode.net - #amarok, #amarok.de, #amarok.es\n\nFeedback:\namarok@kde.org\n\n(Build Date: " __DATE__ ")" ),
              ( "http://amarok.kde.org" ) );
 
 App::App()
-        : KApplication()
+        : KApplication(KApplication::openX11RGBADisplay())
         , m_pPlayerWindow( 0 ) //will be created in applySettings()
 {
     DEBUG_BLOCK

amarok/src/osd.cpp

@@ -139,7 +139,7 @@ OSDWidget::show() //virtual
                 newGeometry.width(), newGeometry.height() ));
 
 
-    else if( m_translucency )
+    else if (( m_translucency ) && (!kapp->isX11CompositionAvailable()))
     {
         const TQRect unite = oldGeometry.unite( newGeometry );
         KPixmap pix = TQPixmap(TQPixmap::grabWindow( qt_xrootwin(), unite.x(), unite.y(), unite.width(), unite.height() ));
@@ -158,7 +158,7 @@ OSDWidget::show() //virtual
         render( M, newGeometry.size() );
         setGeometry( newGeometry );
         TQWidget::show();
-        bitBlt( this, 0, 0, &m_buffer );
+        paintMe();
 
         if( m_duration ) //duration 0 -> stay forever
             m_timer->start( m_duration, true ); //calls hide()
@@ -308,7 +308,7 @@ OSDWidget::render( const uint M, const TQSize &size )
     m_buffer.resize( rect.size() );
     TQPainter p( &m_buffer );
 
-    if( m_translucency )
+    if (( m_translucency ) && (!kapp->isX11CompositionAvailable()))
     {
         KPixmap background( m_screenshot );
         KPixmapEffect::fade( background, 0.80, backgroundColor() );
@@ -386,7 +386,7 @@ OSDWidget::render( const uint M, const TQSize &size )
             pixmapGradient.setMask( mask );
         }
 
-        if( m_translucency )
+        if (( m_translucency ) && (!kapp->isX11CompositionAvailable()))
         {
             KPixmap background( m_screenshot );
             KPixmapEffect::fade( background, 0.80, backgroundColor() );
@@ -487,6 +487,45 @@ OSDWidget::render( const uint M, const TQSize &size )
     p.end();
 }
 
+void
+OSDWidget::paintMe()
+{
+    if ((m_translucency) && (kapp->isX11CompositionAvailable())) {
+        // We have true composition support, so make the OSD truly transparent
+        TQImage blendedImage = m_buffer.convertToImage();
+        blendedImage = blendedImage.convertDepth(32);
+        blendedImage.setAlphaBuffer(true);
+
+	int w = blendedImage.width();
+	int h = blendedImage.height();
+
+	for (int y = 0; y < h; ++y) {
+		TQRgb *ls = (TQRgb *)blendedImage.scanLine( y );
+		for (int x = 0; x < w; ++x) {
+			TQRgb l = ls[x];
+			//int desired_alpha = 127;
+			int desired_alpha = 204;
+			float alpha_adjust = (desired_alpha/256.0);
+			int r = int( tqRed( l ) * alpha_adjust );
+			int g = int( tqGreen( l ) * alpha_adjust );
+			int b = int( tqBlue( l ) * alpha_adjust );
+			int a = int( desired_alpha );
+			ls[x] = tqRgba( r, g, b, a );
+		}
+	}
+
+	// Finally, paint it
+	TQPainter p1;
+	p1.begin( this );
+	blendedImage.setAlphaBuffer(false);
+	p1.drawImage( 0, 0, blendedImage );
+	p1.end();
+    }
+    else {
+        bitBlt( this, 0, 0, &m_buffer );
+    }
+}
+
 bool
 OSDWidget::event( TQEvent *e )
 {
@@ -497,7 +536,7 @@ OSDWidget::event( TQEvent *e )
             unsetColors(); //use new palette's colours
         return true;
     case TQEvent::Paint:
-        bitBlt( this, 0, 0, &m_buffer );
+        paintMe();
         return true;
     default:
         return TQWidget::event( e );

amarok/src/osd.h

@@ -81,6 +81,8 @@ class OSDWidget : public TQWidget
 
         bool useMoodbar( void );
 
+        void paintMe();
+
         /** distance from screen edge */
         static const int MARGIN = 15;