Allow logout screen to use compositing for fadeout in background if available

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdebase@1246376 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

2 files changed, 334 insertions, 109 deletions

diff --git a/ksmserver/main.cpp b/ksmserver/main.cpp
index 797edae96..472883777 100644
--- a/ksmserver/main.cpp
+++ b/ksmserver/main.cpp
@@ -189,7 +189,7 @@ extern "C" KDE_EXPORT int kdemain( int argc, char* argv[] )
     KCmdLineArgs::addCmdLineOptions( options );
 
     putenv((char*)"SESSION_MANAGER=");
-    KApplication a(false, true); // Disable styles until we need them.
+    KARGBApplication(a, false); // Disable styles until we need them.
     fcntl(ConnectionNumber(qt_xdisplay()), F_SETFD, 1);
 
 
diff --git a/ksmserver/shutdowndlg.cpp b/ksmserver/shutdowndlg.cpp
index 261793dcf..d8741da4b 100644
--- a/ksmserver/shutdowndlg.cpp
+++ b/ksmserver/shutdowndlg.cpp
@@ -78,8 +78,18 @@ KSMShutdownFeedback::KSMShutdownFeedback()
    m_greyImageCreated( FALSE )
 
 {
-    DCOPRef("kicker", "KMenu").call("hideMenu");	// Make sure the K Menu is completely removed from the screen before taking a snapshot...
-    m_grayImage = TQPixmap(TQPixmap::grabWindow(qt_xrootwin(), 0, 0, TQApplication::desktop()->width(), TQApplication::desktop()->height())).convertToImage();
+    if (kapp->isX11CompositionAvailable()) {
+        m_grayImage = TQImage( TQApplication::desktop()->width(), TQApplication::desktop()->height(), 32 );
+        m_grayImage = m_grayImage.convertDepth(32);
+        m_grayImage.setAlphaBuffer(false);
+        m_grayImage.fill(0);	// Set the alpha buffer to 0 (fully transparent)
+        m_grayImage.setAlphaBuffer(true);
+    }
+    else {
+        // The hacks below aren't needed any more because Qt3 supports true transparency for the fading logout screen when composition is available
+        DCOPRef("kicker", "KMenu").call("hideMenu");	// Make sure the K Menu is completely removed from the screen before taking a snapshot...
+        m_grayImage = TQPixmap(TQPixmap::grabWindow(qt_xrootwin(), 0, 0, TQApplication::desktop()->width(), TQApplication::desktop()->height())).convertToImage();
+    }
     m_unfadedImage = m_grayImage;
     resize(0, 0);
     setShown(true);
@@ -102,7 +112,7 @@ void KSMShutdownFeedback::fadeBack( void )
 void KSMShutdownFeedback::slotPaintEffect()
 {
     // determine which fade to use
-    if (KConfigGroup(KGlobal::config(), "Logout").readBoolEntry("doFancyLogout", true))
+   if (KConfigGroup(KGlobal::config(), "Logout").readBoolEntry("doFancyLogout", true))
     {
 
 	float doFancyLogoutAdditionalDarkness  = (float)KConfigGroup(KGlobal::config(), "Logout").readDoubleNumEntry("doFancyLogoutAdditionalDarkness", 0.6);
@@ -110,134 +120,348 @@ void KSMShutdownFeedback::slotPaintEffect()
 	float doFancyLogoutFadeTime = (float)KConfigGroup(KGlobal::config(), "Logout").readDoubleNumEntry("doFancyLogoutFadeTime", 4000);
 
 	float doFancyLogoutFadeBackTime = (float)KConfigGroup(KGlobal::config(), "Logout").readDoubleNumEntry("doFancyLogoutFadeBackTime", 1000);
+
+	if (kapp->isX11CompositionAvailable()) {
+		// We can do this in a different (simpler) manner because we have compositing support!
+		// if slotPaintEffect() is called first time, we have to initialize the gray image
+		// we also could do that in the constructor, but then the displaying of the
+		// logout-UI would be too much delayed...
+		if ( m_greyImageCreated == false )
+		{
+			m_greyImageCreated = true;
+			setBackgroundMode( TQWidget::NoBackground );
+			setGeometry( TQApplication::desktop()->geometry() );
+			m_root.resize( width(), height() ); // for the default logout
 	
-	// if slotPaintEffect() is called first time, we have to initialize the gray image
-	// we also could do that in the constructor, but then the displaying of the
-	// logout-UI would be too much delayed...
-	if ( m_greyImageCreated == false )
-	{
-		m_greyImageCreated = true;
-		setBackgroundMode( TQWidget::NoBackground );
-		setGeometry( TQApplication::desktop()->geometry() );
-		m_root.resize( width(), height() ); // for the default logout
-
-		m_unfadedImage = m_grayImage.copy();
-		register uchar * r = m_grayImage.bits();
-		register uchar * g = m_grayImage.bits() + 1;
-		register uchar * b = m_grayImage.bits() + 2;
-		uchar * end = m_grayImage.bits() + m_grayImage.numBytes();
-	
-		while ( r != end ) {
-		*r = *g = *b = (uchar) ( ( (*r)*11 + ((*g)<<4) + (*b)*5 ) * doFancyLogoutAdditionalDarkness / 32.0f );
-		r += 4;
-		g += 4;
-		b += 4;
-		}
-		// start timer which is used for cpu-speed-independent fading
-		m_fadeTime.start();
-		m_rowsDone = 0;
-	}
+			m_unfadedImage = m_grayImage.copy();
 	
-	// return if fading is completely done...
-	if ( ( m_grayOpacity >= 1.0f && m_fadeBackwards == FALSE ) || ( m_grayOpacity <= 0.0f && m_fadeBackwards == TRUE ) )
-		return;
+			register uchar * r = m_grayImage.bits();
+			uchar * end = m_grayImage.bits() + m_grayImage.numBytes();
+		
+			while ( r != end ) {
+				*reinterpret_cast<TQRgb*>(r) = qRgba(0, 0, 0, 128);
+				r += 4;
+			}
 	
+			// start timer which is used for cpu-speed-independent fading
+			m_fadeTime.start();
+			m_rowsDone = 0;
+		}
+		
+		// return if fading is completely done...
+		if ( ( m_grayOpacity >= 1.0f && m_fadeBackwards == FALSE ) || ( m_grayOpacity <= 0.0f && m_fadeBackwards == TRUE ) )
+			return;
+		
+		
+		if ( m_fadeBackwards == FALSE )
+		{
+			m_grayOpacity = m_fadeTime.elapsed() / doFancyLogoutFadeTime;
+			if ( m_grayOpacity > 1.0f )
+			m_grayOpacity = 1.0f;
+		}
+		else
+		{
+			m_grayOpacity = 1.0f - m_fadeTime.elapsed() / doFancyLogoutFadeBackTime - m_compensation;
+			if ( m_grayOpacity < 0.0f )
+			m_grayOpacity = 0.0f;
+		}
+		
+		const int imgWidth = m_unfadedImage.width();
+		int imgHeight = m_unfadedImage.height();
+		int heightUnit = imgHeight / 3;
+		if( heightUnit < 1 )
+			heightUnit = 1;
 	
-	if ( m_fadeBackwards == FALSE )
-	{
-		m_grayOpacity = m_fadeTime.elapsed() / doFancyLogoutFadeTime;
-		if ( m_grayOpacity > 1.0f )
-		m_grayOpacity = 1.0f;
-	}
-	else
-	{
-		m_grayOpacity = 1.0f - m_fadeTime.elapsed() / doFancyLogoutFadeBackTime - m_compensation;
-		if ( m_grayOpacity < 0.0f )
-		m_grayOpacity = 0.0f;
+		int y1 = static_cast<int>( imgHeight*m_grayOpacity - heightUnit + m_grayOpacity*heightUnit*2.0f );
+		if( y1 > imgHeight )
+			y1 = imgHeight;
+		
+		int y2 = y1+heightUnit;
+		if( y2 > imgHeight )
+			y2 = imgHeight;
+		
+		if( m_fadeBackwards == FALSE )
+		{
+			if( y1 > 0 && y1 < imgHeight && y1-m_rowsDone > 0 && m_rowsDone < imgHeight )
+			{
+				TQImage img( imgWidth, y1-m_rowsDone, 32 );
+				memcpy( img.bits(), m_grayImage.scanLine( m_rowsDone ), imgWidth*(y1-m_rowsDone)*4 );
+				bitBlt( this, 0, m_rowsDone, &img );
+				m_rowsDone = y1;
+			}
+		}
+		else
+		{
+			// when fading back we have to blit area which isnt gray anymore to unfaded image
+			if( y2 > 0 && y2 < imgHeight && m_rowsDone > y2 )
+			{
+				TQImage img( imgWidth, m_rowsDone-y2, 32 );
+				memcpy( img.bits(), m_unfadedImage.scanLine( y2 ), imgWidth*(m_rowsDone-y2)*4 );
+				bitBlt( this, 0, y2, &img );
+				m_rowsDone = y2;
+			}
+		}
+		
+		int start_y1 = y1;
+		if( start_y1 < 0 )
+			start_y1 = 0;
+		if( y2 > start_y1 )
+		{
+			TQImage img( imgWidth, y2-start_y1, 32 );
+			memcpy( img.bits(), m_grayImage.scanLine( start_y1 ), ( y2-start_y1 ) * imgWidth * 4 );
+			register uchar * rs = m_unfadedImage.scanLine( start_y1 );
+			register uchar * rd = img.bits();
+			for( int y = start_y1; y < y2; ++y )
+			{
+			// linear gradients look bad, so use cos-function
+				short int opac = static_cast<short int>( 128 - cosf( M_PI*(y-y1)/heightUnit )*128.0f );
+				for( short int x = 0; x < imgWidth; ++x )
+				{
+					*reinterpret_cast<TQRgb*>(rd) = qRgba(0, 0, 0, ((255.0-opac)/(255.0/127.0)));
+					rs += 4; rd += 4;
+				}
+			}
+			bitBlt( this, 0, start_y1, &img );
+		}
+		
+		TQTimer::singleShot( 5, this, TQT_SLOT( slotPaintEffect() ) );
 	}
+	else {
+		// if slotPaintEffect() is called first time, we have to initialize the gray image
+		// we also could do that in the constructor, but then the displaying of the
+		// logout-UI would be too much delayed...
+		if ( m_greyImageCreated == false )
+		{
+			m_greyImageCreated = true;
+			setBackgroundMode( TQWidget::NoBackground );
+			setGeometry( TQApplication::desktop()->geometry() );
+			m_root.resize( width(), height() ); // for the default logout
 	
-	const int imgWidth = m_unfadedImage.width();
-	int imgHeight = m_unfadedImage.height();
-	int heightUnit = imgHeight / 3;
-	if( heightUnit < 1 )
-		heightUnit = 1;
-
-	int y1 = static_cast<int>( imgHeight*m_grayOpacity - heightUnit + m_grayOpacity*heightUnit*2.0f );
-	if( y1 > imgHeight )
-		y1 = imgHeight;
+			m_unfadedImage = m_grayImage.copy();
 	
-	int y2 = y1+heightUnit;
-	if( y2 > imgHeight )
-		y2 = imgHeight;
+			register uchar * r = m_grayImage.bits();
+			register uchar * g = m_grayImage.bits() + 1;
+			register uchar * b = m_grayImage.bits() + 2;
+			uchar * end = m_grayImage.bits() + m_grayImage.numBytes();
+		
+			while ( r != end ) {
+				*r = *g = *b = (uchar) ( ( (*r)*11 + ((*g)<<4) + (*b)*5 ) * doFancyLogoutAdditionalDarkness / 32.0f );
+				r += 4;
+				g += 4;
+				b += 4;
+			}
 	
-	if( m_fadeBackwards == FALSE )
-	{
-		if( y1 > 0 && y1 < imgHeight && y1-m_rowsDone > 0 && m_rowsDone < imgHeight )
+			// start timer which is used for cpu-speed-independent fading
+			m_fadeTime.start();
+			m_rowsDone = 0;
+		}
+		
+		// return if fading is completely done...
+		if ( ( m_grayOpacity >= 1.0f && m_fadeBackwards == FALSE ) || ( m_grayOpacity <= 0.0f && m_fadeBackwards == TRUE ) )
+			return;
+		
+		
+		if ( m_fadeBackwards == FALSE )
 		{
-		TQImage img( imgWidth, y1-m_rowsDone, 32 );
-		memcpy( img.bits(), m_grayImage.scanLine( m_rowsDone ), imgWidth*(y1-m_rowsDone)*4 );
-		// conversion is slow as hell if desktop-depth != 24bpp...
-		//Pixmap pm = m_pmio.convertToPixmap( img );
-		//bitBlt( this, 0, m_rowsDone, &pm );
-//		TQImage pm = m_pmio.convertToImage( img );
-		bitBlt( this, 0, m_rowsDone, &img );		
-		m_rowsDone = y1;
+			m_grayOpacity = m_fadeTime.elapsed() / doFancyLogoutFadeTime;
+			if ( m_grayOpacity > 1.0f )
+			m_grayOpacity = 1.0f;
 		}
-	}
-	else
-	{
-		// when fading back we have to blit area which isnt gray anymore to unfaded image
-		if( y2 > 0 && y2 < imgHeight && m_rowsDone > y2 )
+		else
 		{
-		TQImage img( imgWidth, m_rowsDone-y2, 32 );
-		memcpy( img.bits(), m_unfadedImage.scanLine( y2 ), imgWidth*(m_rowsDone-y2)*4 );
-		// conversion is slow as hell if desktop-depth != 24bpp...
-		//TQPixmap pm = m_pmio.convertToPixmap( img );
-		//bitBlt( this, 0, y2, &pm );
-		bitBlt( this, 0, y2, &img );
-		m_rowsDone = y2;
+			m_grayOpacity = 1.0f - m_fadeTime.elapsed() / doFancyLogoutFadeBackTime - m_compensation;
+			if ( m_grayOpacity < 0.0f )
+			m_grayOpacity = 0.0f;
 		}
-	}
+		
+		const int imgWidth = m_unfadedImage.width();
+		int imgHeight = m_unfadedImage.height();
+		int heightUnit = imgHeight / 3;
+		if( heightUnit < 1 )
+			heightUnit = 1;
 	
-	int start_y1 = y1;
-	if( start_y1 < 0 )
-		start_y1 = 0;
-	if( y2 > start_y1 )
-	{
-		TQImage img( imgWidth, y2-start_y1, 32 );
-		memcpy( img.bits(), m_grayImage.scanLine( start_y1 ), ( y2-start_y1 ) * imgWidth * 4 );
-		register uchar * rs = m_unfadedImage.scanLine( start_y1 );
-		register uchar * gs = rs + 1;
-		register uchar * bs = gs + 1;
-		register uchar * rd = img.bits();
-		register uchar * gd = rd + 1;
-		register uchar * bd = gd + 1;
-		for( int y = start_y1; y < y2; ++y )
+		int y1 = static_cast<int>( imgHeight*m_grayOpacity - heightUnit + m_grayOpacity*heightUnit*2.0f );
+		if( y1 > imgHeight )
+			y1 = imgHeight;
+		
+		int y2 = y1+heightUnit;
+		if( y2 > imgHeight )
+			y2 = imgHeight;
+		
+		if( m_fadeBackwards == FALSE )
 		{
-		// linear gradients look bad, so use cos-function
-		short int opac = static_cast<short int>( 128 - cosf( M_PI*(y-y1)/heightUnit )*128.0f );
-		for( short int x = 0; x < imgWidth; ++x )
+			if( y1 > 0 && y1 < imgHeight && y1-m_rowsDone > 0 && m_rowsDone < imgHeight )
+			{
+				TQImage img( imgWidth, y1-m_rowsDone, 32 );
+				memcpy( img.bits(), m_grayImage.scanLine( m_rowsDone ), imgWidth*(y1-m_rowsDone)*4 );
+				// conversion is slow as hell if desktop-depth != 24bpp...
+				//Pixmap pm = m_pmio.convertToPixmap( img );
+				//bitBlt( this, 0, m_rowsDone, &pm );
+				//TQImage pm = m_pmio.convertToImage( img );
+				bitBlt( this, 0, m_rowsDone, &img );
+				m_rowsDone = y1;
+			}
+		}
+		else
 		{
-			*rd += ( ( ( *rs - *rd ) * opac ) >> 8 );
-			rs += 4; rd += 4;
-			*gd += ( ( ( *gs - *gd ) * opac ) >> 8 );
-			gs += 4; gd += 4;
-			*bd += ( ( ( *bs - *bd ) * opac ) >> 8 );
-			bs += 4; bd += 4;
+			// when fading back we have to blit area which isnt gray anymore to unfaded image
+			if( y2 > 0 && y2 < imgHeight && m_rowsDone > y2 )
+			{
+				TQImage img( imgWidth, m_rowsDone-y2, 32 );
+				memcpy( img.bits(), m_unfadedImage.scanLine( y2 ), imgWidth*(m_rowsDone-y2)*4 );
+				// conversion is slow as hell if desktop-depth != 24bpp...
+				//TQPixmap pm = m_pmio.convertToPixmap( img );
+				//bitBlt( this, 0, y2, &pm );
+				bitBlt( this, 0, y2, &img );
+				m_rowsDone = y2;
+			}
 		}
+		
+		int start_y1 = y1;
+		if( start_y1 < 0 )
+			start_y1 = 0;
+		if( y2 > start_y1 )
+		{
+			TQImage img( imgWidth, y2-start_y1, 32 );
+			memcpy( img.bits(), m_grayImage.scanLine( start_y1 ), ( y2-start_y1 ) * imgWidth * 4 );
+			register uchar * rs = m_unfadedImage.scanLine( start_y1 );
+			register uchar * gs = rs + 1;
+			register uchar * bs = gs + 1;
+			register uchar * rd = img.bits();
+			register uchar * gd = rd + 1;
+			register uchar * bd = gd + 1;
+			for( int y = start_y1; y < y2; ++y )
+			{
+				// linear gradients look bad, so use cos-function
+				short int opac = static_cast<short int>( 128 - cosf( M_PI*(y-y1)/heightUnit )*128.0f );
+				for( short int x = 0; x < imgWidth; ++x )
+				{
+					*rd += ( ( ( *rs - *rd ) * opac ) >> 8 );
+					rs += 4; rd += 4;
+					*gd += ( ( ( *gs - *gd ) * opac ) >> 8 );
+					gs += 4; gd += 4;
+					*bd += ( ( ( *bs - *bd ) * opac ) >> 8 );
+					bs += 4; bd += 4;
+				}
+			}
+			// conversion is slow as hell if desktop-depth != 24bpp...
+			//TQPixmap pm = m_pmio.convertToPixmap( img );
+			//bitBlt( this, 0, start_y1, &pm );
+			bitBlt( this, 0, start_y1, &img );
 		}
-		// conversion is slow as hell if desktop-depth != 24bpp...
-		//TQPixmap pm = m_pmio.convertToPixmap( img );
-		//bitBlt( this, 0, start_y1, &pm );
-		bitBlt( this, 0, start_y1, &img );
+		
+		TQTimer::singleShot( 5, this, TQT_SLOT( slotPaintEffect() ) );
 	}
-	
-	TQTimer::singleShot( 5, this, TQT_SLOT( slotPaintEffect() ) );
 
     }
     // standard logout fade
     else
     {
+         if (kapp->isX11CompositionAvailable()) {
+		// We can do this in a different (simpler) manner because we have compositing support!
+		// The end effect will be very similar to the old style logout
+		float doFancyLogoutFadeTime = 1000;
+		float doFancyLogoutFadeBackTime = 0;
+		if ( m_greyImageCreated == false )
+		{
+			m_greyImageCreated = true;
+			setBackgroundMode( TQWidget::NoBackground );
+			setGeometry( TQApplication::desktop()->geometry() );
+			m_root.resize( width(), height() ); // for the default logout
+	
+			m_unfadedImage = m_grayImage.copy();
+	
+			register uchar * r = m_grayImage.bits();
+			uchar * end = m_grayImage.bits() + m_grayImage.numBytes();
+		
+			while ( r != end ) {
+				*reinterpret_cast<TQRgb*>(r) = qRgba(0, 0, 0, 107);
+				r += 4;
+			}
+	
+			// start timer which is used for cpu-speed-independent fading
+			m_fadeTime.start();
+			m_rowsDone = 0;
+		}
+		
+		// return if fading is completely done...
+		if ( ( m_grayOpacity >= 1.0f && m_fadeBackwards == FALSE ) || ( m_grayOpacity <= 0.0f && m_fadeBackwards == TRUE ) )
+			return;
+		
+		
+		if ( m_fadeBackwards == FALSE )
+		{
+			m_grayOpacity = m_fadeTime.elapsed() / doFancyLogoutFadeTime;
+			if ( m_grayOpacity > 1.0f )
+			m_grayOpacity = 1.0f;
+		}
+		else
+		{
+			m_grayOpacity = 1.0f - m_fadeTime.elapsed() / doFancyLogoutFadeBackTime - m_compensation;
+			if ( m_grayOpacity < 0.0f )
+			m_grayOpacity = 0.0f;
+		}
+		
+		const int imgWidth = m_unfadedImage.width();
+		int imgHeight = m_unfadedImage.height();
+		int heightUnit = imgHeight / 3;
+		if( heightUnit < 1 )
+			heightUnit = 1;
+	
+		int y1 = static_cast<int>( imgHeight*m_grayOpacity - heightUnit + m_grayOpacity*heightUnit*2.0f );
+		if( y1 > imgHeight )
+			y1 = imgHeight;
+		
+		int y2 = y1+heightUnit;
+		if( y2 > imgHeight )
+			y2 = imgHeight;
+		
+		if( m_fadeBackwards == FALSE )
+		{
+			if( y1 > 0 && y1 < imgHeight && y1-m_rowsDone > 0 && m_rowsDone < imgHeight )
+			{
+				TQImage img( imgWidth, y1-m_rowsDone, 32 );
+				memcpy( img.bits(), m_grayImage.scanLine( m_rowsDone ), imgWidth*(y1-m_rowsDone)*4 );
+				bitBlt( this, 0, m_rowsDone, &img );
+				m_rowsDone = y1;
+			}
+		}
+		else
+		{
+			// when fading back we have to blit area which isnt gray anymore to unfaded image
+			if( y2 > 0 && y2 < imgHeight && m_rowsDone > y2 )
+			{
+				TQImage img( imgWidth, m_rowsDone-y2, 32 );
+				memcpy( img.bits(), m_unfadedImage.scanLine( y2 ), imgWidth*(m_rowsDone-y2)*4 );
+				bitBlt( this, 0, y2, &img );
+				m_rowsDone = y2;
+			}
+		}
+		
+		int start_y1 = y1;
+		if( start_y1 < 0 )
+			start_y1 = 0;
+		if( y2 > start_y1 )
+		{
+			TQImage img( imgWidth, y2-start_y1, 32 );
+			memcpy( img.bits(), m_grayImage.scanLine( start_y1 ), ( y2-start_y1 ) * imgWidth * 4 );
+			register uchar * rs = m_unfadedImage.scanLine( start_y1 );
+			register uchar * rd = img.bits();
+			for( int y = start_y1; y < y2; ++y )
+			{
+			// linear gradients look bad, so use cos-function
+				for( short int x = 0; x < imgWidth; ++x )
+				{
+					*reinterpret_cast<TQRgb*>(rd) = qRgba(0, 0, 0, 107);
+					rs += 4; rd += 4;
+				}
+			}
+			bitBlt( this, 0, start_y1, &img );
+		}
+		
+		TQTimer::singleShot( 1, this, TQT_SLOT( slotPaintEffect() ) );
+         }
+         else {
 	    if ( m_currentY >= height() ) {
 	        if ( backgroundMode() == TQWidget::NoBackground ) {
 	            setBackgroundMode( TQWidget::NoBackground );
@@ -256,6 +480,7 @@ void KSMShutdownFeedback::slotPaintEffect()
 	    bitBlt( &m_root, 0, m_currentY, &pixmap );
 	    m_currentY += 10;
 	    TQTimer::singleShot( 1, this, TQT_SLOT( slotPaintEffect() ) );
+        }
     }
 
 }