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kwin/composite.cpp
Luboš Luňák 0ae5a772e7 Add EffectWindow as a window representation for effects, 
to hide the change from Client/Unmanaged and eventually also
act as the only API available to effects.


svn path=/branches/work/kwin_composite/; revision=626360
2007-01-22 22:57:22 +00:00

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/*****************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2006 Lubos Lunak <l.lunak@kde.org>
You can Freely distribute this program under the GNU General Public
License. See the file "COPYING" for the exact licensing terms.
******************************************************************/
/*
Code related to compositing (redirecting windows to pixmaps and tracking
window damage).
Docs:
XComposite (the protocol, but the function calls map to it):
http://gitweb.freedesktop.org/?p=xorg/proto/compositeproto.git;a=blob_plain;hb=HEAD;f=compositeproto.txt
XDamage (again the protocol):
http://gitweb.freedesktop.org/?p=xorg/proto/damageproto.git;a=blob_plain;hb=HEAD;f=damageproto.txt
Composite HOWTO from Fredrik:
http://ktown.kde.org/~fredrik/composite_howto.html
*/
#include "utils.h"
#include "workspace.h"
#include "client.h"
#include "unmanaged.h"
#include "deleted.h"
#include "effects.h"
#include "scene.h"
#include "scene_basic.h"
#include "scene_xrender.h"
#include "scene_opengl.h"
#include <stdio.h>
#include <QMenu>
#include <X11/extensions/shape.h>
namespace KWinInternal
{
//****************************************
// Workspace
//****************************************
#if defined( HAVE_XCOMPOSITE ) && defined( HAVE_XDAMAGE )
void Workspace::setupCompositing()
{
if( !options->useTranslucency )
return;
if( !Extensions::compositeAvailable() || !Extensions::damageAvailable())
return;
if( scene != NULL )
return;
char selection_name[ 100 ];
sprintf( selection_name, "_NET_WM_CM_S%d", DefaultScreen( display()));
cm_selection = new KSelectionOwner( selection_name );
connect( cm_selection, SIGNAL( lostOwnership()), SLOT( lostCMSelection()));
cm_selection->claim( true ); // force claiming
char type = 'O';
if( getenv( "KWIN_COMPOSE" ))
type = getenv( "KWIN_COMPOSE" )[ 0 ];
switch( type )
{
case 'B':
scene = new SceneBasic( this );
break;
case 'X':
scene = new SceneXrender( this );
break;
case 'O':
scene = new SceneOpenGL( this );
break;
default:
kDebug( 1212 ) << "No compositing" << endl;
return;
}
int rate = 0;
if( options->refreshRate > 0 )
{ // use manually configured refresh rate
rate = options->refreshRate;
}
#ifdef HAVE_XRANDR
else
{ // autoconfigure refresh rate based on XRandR info
if( Extensions::randrAvailable() )
{
XRRScreenConfiguration *config;
config = XRRGetScreenInfo( display(), rootWindow() );
rate = XRRConfigCurrentRate( config );
XRRFreeScreenConfigInfo( config );
}
}
#endif
// 0Hz or less is invalid, so we fallback to a default rate
if( rate <= 0 )
rate = 50;
// QTimer gives us 1msec (1000Hz) at best, so we ignore anything higher;
// however, since compositing is limited to no more than once per 5msec,
// 200Hz to 1000Hz are effectively identical
else if( rate > 1000 )
rate = 1000;
kDebug( 1212 ) << "Refresh rate " << rate << "Hz" << endl;
compositeRate = 1000 / rate;
compositeTimer.start( compositeRate );
lastCompositePaint.start();
XCompositeRedirectSubwindows( display(), rootWindow(), CompositeRedirectManual );
if( dynamic_cast< SceneOpenGL* >( scene ))
kDebug( 1212 ) << "OpenGL compositing" << endl;
else if( dynamic_cast< SceneXrender* >( scene ))
kDebug( 1212 ) << "XRender compositing" << endl;
else if( dynamic_cast< SceneBasic* >( scene ))
kDebug( 1212 ) << "X compositing" << endl;
new EffectsHandler( this ); // sets also the 'effects' pointer
addDamageFull();
foreach( Client* c, clients )
c->setupCompositing();
foreach( Unmanaged* c, unmanaged )
c->setupCompositing();
foreach( Client* c, clients )
scene->windowAdded( c );
foreach( Unmanaged* c, unmanaged )
scene->windowAdded( c );
delete popup; // force re-creation of the Alt+F3 popup (opacity option)
popup = NULL;
}
void Workspace::finishCompositing()
{
if( scene == NULL )
return;
delete cm_selection;
foreach( Client* c, clients )
scene->windowClosed( c, NULL );
foreach( Unmanaged* c, unmanaged )
scene->windowClosed( c, NULL );
foreach( Deleted* c, deleted )
scene->windowDeleted( c );
foreach( Client* c, clients )
c->finishCompositing();
foreach( Unmanaged* c, unmanaged )
c->finishCompositing();
foreach( Deleted* c, deleted )
c->finishCompositing();
XCompositeUnredirectSubwindows( display(), rootWindow(), CompositeRedirectManual );
compositeTimer.stop();
delete effects;
effects = NULL;
delete scene;
scene = NULL;
damage_region = QRegion();
for( ClientList::ConstIterator it = clients.begin();
it != clients.end();
++it )
{ // forward all opacity values to the frame in case there'll be other CM running
if( (*it)->opacity() != 1.0 )
{
NETWinInfo i( display(), (*it)->frameId(), rootWindow(), 0 );
i.setOpacity( static_cast< unsigned long >((*it)->opacity() * 0xffffffff ));
}
}
delete popup; // force re-creation of the Alt+F3 popup (opacity option)
popup = NULL;
}
void Workspace::lostCMSelection()
{
kDebug( 1212 ) << "Lost compositing manager selection" << endl;
finishCompositing();
}
void Workspace::addDamage( int x, int y, int w, int h )
{
if( !compositing())
return;
damage_region += QRegion( x, y, w, h );
}
void Workspace::addDamage( const QRect& r )
{
if( !compositing())
return;
damage_region += r;
}
void Workspace::addDamageFull()
{
if( !compositing())
return;
damage_region = QRegion( 0, 0, displayWidth(), displayHeight());
}
void Workspace::performCompositing()
{
// The event loop apparently tries to fire a QTimer as often as possible, even
// at the expense of not processing many X events. This means that the composite
// repaints can seriously impact performance of everything else, therefore throttle
// them - leave at least 5msec time after one repaint is finished and next one
// is started.
if( lastCompositePaint.elapsed() < 5 )
return;
if( damage_region.isEmpty()) // no damage
{
scene->idle();
return;
}
// create a list of all windows in the stacking order
// TODO keep this list like now a stacking order of Client window is kept
ToplevelList windows;
Window* children;
unsigned int children_count;
Window dummy;
XQueryTree( display(), rootWindow(), &dummy, &dummy, &children, &children_count );
for( unsigned int i = 0;
i < children_count;
++i )
{
if( Client* c = findClient( FrameIdMatchPredicate( children[ i ] )))
windows.append( c );
else if( Unmanaged* c = findUnmanaged( HandleMatchPredicate( children[ i ] )))
windows.append( c );
}
foreach( Deleted* c, deleted ) // TODO remember stacking order somehow
windows.append( c );
QRegion damage = damage_region;
// clear all damage, so that post-pass can add damage for the next repaint
damage_region = QRegion();
scene->paint( damage, windows );
if( scene->waitSyncAvailable() && options->glVSync )
{ // if we're using vsync, then time the next paint pass to
// before the next available sync
int paintTime = ( lastCompositePaint.elapsed() % compositeRate ) +
( compositeRate / 2 );
if( paintTime >= compositeRate )
compositeTimer.start( paintTime );
else if( paintTime < compositeRate )
compositeTimer.start( compositeRate - paintTime );
}
lastCompositePaint.start();
}
bool Workspace::createOverlay()
{
assert( overlay == None );
if( !Extensions::compositeOverlayAvailable())
return false;
#ifdef HAVE_XCOMPOSITE_OVERLAY
overlay = XCompositeGetOverlayWindow( display(), rootWindow());
if( overlay == None )
return false;
return true;
#else
return false;
#endif
}
void Workspace::setupOverlay( Window w )
{
assert( overlay != None );
XShapeCombineRectangles( display(), overlay, ShapeInput, 0, 0, NULL, 0, ShapeSet, Unsorted );
if( w != None )
{
XShapeCombineRectangles( display(), w, ShapeInput, 0, 0, NULL, 0, ShapeSet, Unsorted );
XMapWindow( display(), w );
}
XMapRaised( display(), overlay );
}
void Workspace::destroyOverlay()
{
if( overlay == None )
return;
#ifdef HAVE_XCOMPOSITE_OVERLAY
XCompositeReleaseOverlayWindow( display(), overlay );
#endif
overlay = None;
}
//****************************************
// Toplevel
//****************************************
void Toplevel::setupCompositing()
{
if( !compositing())
return;
if( damage_handle != None )
return;
damage_handle = XDamageCreate( display(), handle(), XDamageReportRawRectangles );
damage_region = QRegion( 0, 0, width(), height());
effect_window = new EffectWindow();
effect_window->setWindow( this );
}
void Toplevel::finishCompositing()
{
if( damage_handle == None )
return;
XDamageDestroy( display(), damage_handle );
discardWindowPixmap();
damage_handle = None;
damage_region = QRegion();
delete effect_window;
effect_window = NULL;
}
void Toplevel::discardWindowPixmap()
{
if( window_pix == None )
return;
XFreePixmap( display(), window_pix );
window_pix = None;
}
Pixmap Toplevel::createWindowPixmap() const
{
assert( compositing());
return XCompositeNameWindowPixmap( display(), handle());
}
void Toplevel::damageNotifyEvent( XDamageNotifyEvent* e )
{
addDamage( e->area.x, e->area.y, e->area.width, e->area.height );
}
void Toplevel::addDamage( const QRect& r )
{
addDamage( r.x(), r.y(), r.width(), r.height());
}
void Toplevel::addDamage( int x, int y, int w, int h )
{
if( !compositing())
return;
QRect r( x, y, w, h );
// resizing the decoration may lag behind a bit and when shrinking there
// may be a damage event coming with size larger than the current window size
r &= rect();
damage_region += r;
r.translate( this->x(), this->y());
// this could be possibly optimized to damage Workspace only if the toplevel
// is actually visible there and not obscured by something, but I guess
// that's not really worth it
workspace()->addDamage( r );
}
void Toplevel::addDamageFull()
{
damage_region = QRegion(); // first reset e.g. in case of shrinking
addDamage( rect());
}
void Toplevel::resetDamage( const QRect& r )
{
damage_region -= r;
}
#endif
} // namespace
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