489 lines
15 KiB
C++
489 lines
15 KiB
C++
/*****************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2006 Lubos Lunak <l.lunak@kde.org>
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You can Freely distribute this program under the GNU General Public
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License. See the file "COPYING" for the exact licensing terms.
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******************************************************************/
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/*
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Code related to compositing (redirecting windows to pixmaps and tracking
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window damage).
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Docs:
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XComposite (the protocol, but the function calls map to it):
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http://gitweb.freedesktop.org/?p=xorg/proto/compositeproto.git;a=blob_plain;hb=HEAD;f=compositeproto.txt
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XDamage (again the protocol):
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http://gitweb.freedesktop.org/?p=xorg/proto/damageproto.git;a=blob_plain;hb=HEAD;f=damageproto.txt
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Composite HOWTO from Fredrik:
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http://ktown.kde.org/~fredrik/composite_howto.html
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*/
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#include "utils.h"
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#include "workspace.h"
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#include "client.h"
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#include "unmanaged.h"
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#include "deleted.h"
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#include "effects.h"
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#include "scene.h"
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#include "scene_basic.h"
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#include "scene_xrender.h"
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#include "scene_opengl.h"
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#include <stdio.h>
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#include <QMenu>
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#include <kxerrorhandler.h>
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#include <X11/extensions/shape.h>
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namespace KWin
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{
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//****************************************
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// Workspace
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//****************************************
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void Workspace::setupCompositing()
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{
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#if defined( HAVE_XCOMPOSITE ) && defined( HAVE_XDAMAGE )
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if( !options->useTranslucency )
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return;
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if( !Extensions::compositeAvailable() || !Extensions::damageAvailable())
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return;
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if( scene != NULL )
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return;
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char selection_name[ 100 ];
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sprintf( selection_name, "_NET_WM_CM_S%d", DefaultScreen( display()));
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cm_selection = new KSelectionOwner( selection_name );
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connect( cm_selection, SIGNAL( lostOwnership()), SLOT( lostCMSelection()));
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cm_selection->claim( true ); // force claiming
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char type = 'O';
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if( getenv( "KWIN_COMPOSE" ))
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type = getenv( "KWIN_COMPOSE" )[ 0 ];
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switch( type )
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{
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case 'B':
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scene = new SceneBasic( this );
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kDebug( 1212 ) << "X compositing" << endl;
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break;
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#if defined(HAVE_XRENDER) && defined(HAVE_XFIXES)
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case 'X':
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scene = new SceneXrender( this );
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kDebug( 1212 ) << "XRender compositing" << endl;
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break;
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#endif
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#ifdef HAVE_OPENGL
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case 'O':
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scene = new SceneOpenGL( this );
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kDebug( 1212 ) << "OpenGL compositing" << endl;
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break;
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#endif
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default:
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kDebug( 1212 ) << "No compositing" << endl;
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return;
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}
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int rate = 0;
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if( options->refreshRate > 0 )
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{ // use manually configured refresh rate
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rate = options->refreshRate;
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}
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#ifdef HAVE_XRANDR
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else
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{ // autoconfigure refresh rate based on XRandR info
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if( Extensions::randrAvailable() )
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{
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XRRScreenConfiguration *config;
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config = XRRGetScreenInfo( display(), rootWindow() );
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rate = XRRConfigCurrentRate( config );
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XRRFreeScreenConfigInfo( config );
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}
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}
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#endif
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// 0Hz or less is invalid, so we fallback to a default rate
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if( rate <= 0 )
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rate = 50;
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// QTimer gives us 1msec (1000Hz) at best, so we ignore anything higher;
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// however, since compositing is limited to no more than once per 5msec,
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// 200Hz to 1000Hz are effectively identical
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else if( rate > 1000 )
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rate = 1000;
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kDebug( 1212 ) << "Refresh rate " << rate << "Hz" << endl;
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compositeRate = 1000 / rate;
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compositeTimer.start( compositeRate );
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lastCompositePaint.start();
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XCompositeRedirectSubwindows( display(), rootWindow(), CompositeRedirectManual );
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new EffectsHandlerImpl( scene->compositingType() ); // sets also the 'effects' pointer
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addRepaintFull();
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foreach( Client* c, clients )
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c->setupCompositing();
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foreach( Client* c, desktops )
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c->setupCompositing();
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foreach( Unmanaged* c, unmanaged )
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c->setupCompositing();
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foreach( Client* c, clients )
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scene->windowAdded( c );
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foreach( Client* c, desktops )
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scene->windowAdded( c );
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foreach( Unmanaged* c, unmanaged )
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scene->windowAdded( c );
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delete popup; // force re-creation of the Alt+F3 popup (opacity option)
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popup = NULL;
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#endif
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}
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void Workspace::finishCompositing()
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{
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#if defined( HAVE_XCOMPOSITE ) && defined( HAVE_XDAMAGE )
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if( scene == NULL )
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return;
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delete cm_selection;
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foreach( Client* c, clients )
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scene->windowClosed( c, NULL );
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foreach( Client* c, desktops )
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scene->windowClosed( c, NULL );
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foreach( Unmanaged* c, unmanaged )
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scene->windowClosed( c, NULL );
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foreach( Deleted* c, deleted )
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scene->windowDeleted( c );
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foreach( Client* c, clients )
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c->finishCompositing();
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foreach( Client* c, desktops )
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c->finishCompositing();
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foreach( Unmanaged* c, unmanaged )
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c->finishCompositing();
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foreach( Deleted* c, deleted )
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c->finishCompositing();
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XCompositeUnredirectSubwindows( display(), rootWindow(), CompositeRedirectManual );
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compositeTimer.stop();
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delete effects;
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effects = NULL;
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delete scene;
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scene = NULL;
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repaints_region = QRegion();
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for( ClientList::ConstIterator it = clients.begin();
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it != clients.end();
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++it )
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{ // forward all opacity values to the frame in case there'll be other CM running
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if( (*it)->opacity() != 1.0 )
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{
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NETWinInfo i( display(), (*it)->frameId(), rootWindow(), 0 );
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i.setOpacity( static_cast< unsigned long >((*it)->opacity() * 0xffffffff ));
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}
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}
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delete popup; // force re-creation of the Alt+F3 popup (opacity option)
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popup = NULL;
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#endif
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}
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void Workspace::lostCMSelection()
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{
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kDebug( 1212 ) << "Lost compositing manager selection" << endl;
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finishCompositing();
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}
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void Workspace::addRepaint( int x, int y, int w, int h )
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{
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if( !compositing())
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return;
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repaints_region += QRegion( x, y, w, h );
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}
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void Workspace::addRepaint( const QRect& r )
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{
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if( !compositing())
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return;
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repaints_region += r;
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}
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void Workspace::addRepaintFull()
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{
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if( !compositing())
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return;
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repaints_region = QRegion( 0, 0, displayWidth(), displayHeight());
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}
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void Workspace::performCompositing()
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{
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#if defined( HAVE_XCOMPOSITE ) && defined( HAVE_XDAMAGE )
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// The event loop apparently tries to fire a QTimer as often as possible, even
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// at the expense of not processing many X events. This means that the composite
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// repaints can seriously impact performance of everything else, therefore throttle
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// them - leave at least 5msec time after one repaint is finished and next one
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// is started.
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if( lastCompositePaint.elapsed() < 5 )
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return;
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checkCursorPos();
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if( repaints_region.isEmpty() && !windowRepaintsPending()) // no damage
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{
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scene->idle();
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return;
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}
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// create a list of all windows in the stacking order
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// TODO keep this list like now a stacking order of Client window is kept
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ToplevelList windows;
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Window* children;
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unsigned int children_count;
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Window dummy;
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XQueryTree( display(), rootWindow(), &dummy, &dummy, &children, &children_count );
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for( unsigned int i = 0;
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i < children_count;
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++i )
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{
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if( Client* c = findClient( FrameIdMatchPredicate( children[ i ] )))
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windows.append( c );
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else if( Unmanaged* c = findUnmanaged( WindowMatchPredicate( children[ i ] )))
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windows.append( c );
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}
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foreach( Deleted* c, deleted ) // TODO remember stacking order somehow
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windows.append( c );
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if( children != NULL )
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XFree( children );
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foreach( Toplevel* c, windows )
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{ // This could be possibly optimized WRT obscuring, but that'd need being already
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// past prePaint() phase - probably not worth it.
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// TODO I think effects->transformWindowDamage() doesn't need to be called here,
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// pre-paint will extend painted window areas as necessary.
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repaints_region |= c->repaints().translated( c->pos());
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c->resetRepaints( c->rect());
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}
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QRegion repaints = repaints_region;
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// clear all repaints, so that post-pass can add repaints for the next repaint
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repaints_region = QRegion();
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scene->paint( repaints, windows );
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if( scene->waitSyncAvailable() && options->glVSync )
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{ // if we're using vsync, then time the next paint pass to
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// before the next available sync
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int paintTime = ( lastCompositePaint.elapsed() % compositeRate ) +
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( compositeRate / 2 );
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if( paintTime >= compositeRate )
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compositeTimer.start( paintTime );
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else if( paintTime < compositeRate )
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compositeTimer.start( compositeRate - paintTime );
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}
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lastCompositePaint.start();
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#endif
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}
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bool Workspace::windowRepaintsPending() const
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{
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foreach( Toplevel* c, clients )
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if( !c->repaints().isEmpty())
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return true;
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foreach( Toplevel* c, desktops )
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if( !c->repaints().isEmpty())
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return true;
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foreach( Toplevel* c, unmanaged )
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if( !c->repaints().isEmpty())
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return true;
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foreach( Toplevel* c, deleted )
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if( !c->repaints().isEmpty())
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return true;
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return false;
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}
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bool Workspace::createOverlay()
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{
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assert( overlay == None );
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if( !Extensions::compositeOverlayAvailable())
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return false;
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#ifdef HAVE_XCOMPOSITE_OVERLAY
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overlay = XCompositeGetOverlayWindow( display(), rootWindow());
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if( overlay == None )
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return false;
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return true;
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#else
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return false;
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#endif
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}
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void Workspace::setupOverlay( Window w )
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{
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assert( overlay != None );
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XShapeCombineRectangles( display(), overlay, ShapeInput, 0, 0, NULL, 0, ShapeSet, Unsorted );
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if( w != None )
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{
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XShapeCombineRectangles( display(), w, ShapeInput, 0, 0, NULL, 0, ShapeSet, Unsorted );
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XMapWindow( display(), w );
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}
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XMapRaised( display(), overlay );
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}
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void Workspace::destroyOverlay()
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{
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if( overlay == None )
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return;
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#ifdef HAVE_XCOMPOSITE_OVERLAY
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XCompositeReleaseOverlayWindow( display(), overlay );
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#endif
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overlay = None;
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}
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//****************************************
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// Toplevel
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//****************************************
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void Toplevel::setupCompositing()
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{
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#if defined( HAVE_XCOMPOSITE ) && defined( HAVE_XDAMAGE )
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if( !compositing())
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return;
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if( damage_handle != None )
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return;
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damage_handle = XDamageCreate( display(), frameId(), XDamageReportRawRectangles );
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damage_region = QRegion( 0, 0, width(), height());
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effect_window = new EffectWindowImpl();
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effect_window->setWindow( this );
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#endif
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}
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void Toplevel::finishCompositing()
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{
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#if defined( HAVE_XCOMPOSITE ) && defined( HAVE_XDAMAGE )
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if( damage_handle == None )
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return;
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if( effect_window->window() == this ) // otherwise it's already passed to Deleted, don't free data
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{
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discardWindowPixmap();
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delete effect_window;
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}
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XDamageDestroy( display(), damage_handle );
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damage_handle = None;
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damage_region = QRegion();
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repaints_region = QRegion();
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effect_window = NULL;
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#endif
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}
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void Toplevel::discardWindowPixmap()
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{
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addDamageFull();
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if( window_pix == None )
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return;
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XFreePixmap( display(), window_pix );
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window_pix = None;
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}
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Pixmap Toplevel::createWindowPixmap()
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{
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#ifdef HAVE_XCOMPOSITE
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assert( compositing());
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grabXServer();
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KXErrorHandler err;
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window_pix = XCompositeNameWindowPixmap( display(), frameId());
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// check that the received pixmap is valid and actually matches what we
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// know about the window (i.e. size)
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XWindowAttributes attrs;
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if( !XGetWindowAttributes( display(), frameId(), &attrs ))
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window_pix = None;
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if( err.error( false ))
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window_pix = None;
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if( attrs.width != width() || attrs.height != height() || attrs.map_state != IsViewable )
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window_pix = None;
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ungrabXServer();
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if( window_pix == None )
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kDebug( 1212 ) << "Creating window pixmap failed: " << this << endl;
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return window_pix;
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#else
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return None;
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#endif
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}
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#ifdef HAVE_XDAMAGE
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void Toplevel::damageNotifyEvent( XDamageNotifyEvent* e )
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{
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addDamage( e->area.x, e->area.y, e->area.width, e->area.height );
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// compress
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while( XPending( display()))
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{
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XEvent e2;
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if( XPeekEvent( display(), &e2 ) && e2.type == Extensions::damageNotifyEvent()
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&& e2.xany.window == frameId())
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{
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XNextEvent( display(), &e2 );
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XDamageNotifyEvent* e = reinterpret_cast< XDamageNotifyEvent* >( &e2 );
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addDamage( e->area.x, e->area.y, e->area.width, e->area.height );
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continue;
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}
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break;
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}
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}
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#endif
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void Toplevel::addDamage( const QRect& r )
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{
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addDamage( r.x(), r.y(), r.width(), r.height());
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}
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void Toplevel::addDamage( int x, int y, int w, int h )
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{
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if( !compositing())
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return;
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QRect r( x, y, w, h );
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// resizing the decoration may lag behind a bit and when shrinking there
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// may be a damage event coming with size larger than the current window size
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r &= rect();
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damage_region += r;
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repaints_region += r;
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static_cast<EffectsHandlerImpl*>(effects)->windowDamaged( effectWindow(), r );
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}
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void Toplevel::addDamageFull()
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{
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if( !compositing())
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return;
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damage_region = rect();
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repaints_region = rect();
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static_cast<EffectsHandlerImpl*>(effects)->windowDamaged( effectWindow(), rect());
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}
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void Toplevel::resetDamage( const QRect& r )
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{
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damage_region -= r;
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}
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void Toplevel::addRepaint( const QRect& r )
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{
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addRepaint( r.x(), r.y(), r.width(), r.height());
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}
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void Toplevel::addRepaint( int x, int y, int w, int h )
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{
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if( !compositing())
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return;
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QRect r( x, y, w, h );
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r &= rect();
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repaints_region += r;
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}
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void Toplevel::addRepaintFull()
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{
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repaints_region = rect();
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}
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void Toplevel::resetRepaints( const QRect& r )
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{
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repaints_region -= r;
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}
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void Toplevel::addWorkspaceRepaint( int x, int y, int w, int h )
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{
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addWorkspaceRepaint( QRect( x, y, w, h ));
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}
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void Toplevel::addWorkspaceRepaint( const QRect& r2 )
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{
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if( !compositing())
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return;
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QRect r = effects->transformWindowDamage( effectWindow(), r2 );
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workspace()->addRepaint( r );
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}
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} // namespace
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