d92d3a8165
describe the design, add links to external docs. Restructure COMPOSITE_TODO into sections and add sort of priorities. svn path=/branches/work/kwin_composite/; revision=600163
85 lines
2.5 KiB
C++
85 lines
2.5 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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This is very simple compositing code using only plain X. It doesn't use any effects
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or anything like that, it merely draws everything as it would be visible without
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compositing. It was the first compositing code in KWin and is usable only for testing
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and as the very simple "this is how it works".
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*/
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#include "scene_basic.h"
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#include "utils.h"
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#include "client.h"
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namespace KWinInternal
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{
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SceneBasic::SceneBasic( Workspace* ws )
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: Scene( ws )
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{
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}
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SceneBasic::~SceneBasic()
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{
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}
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void SceneBasic::paint( QRegion, ToplevelList windows )
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{
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Pixmap composite_pixmap = XCreatePixmap( display(), rootWindow(), displayWidth(), displayHeight(), QX11Info::appDepth());
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XGCValues val;
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val.foreground = WhitePixel( display(), DefaultScreen( display()));
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val.subwindow_mode = IncludeInferiors;
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GC gc = XCreateGC( display(), composite_pixmap, GCForeground | GCSubwindowMode, &val );
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XFillRectangle( display(), composite_pixmap, gc, 0, 0, displayWidth(), displayHeight());
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for( ToplevelList::ConstIterator it = windows.begin();
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it != windows.end();
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++it )
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{
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QRect r = (*it)->geometry().intersect( QRect( 0, 0, displayWidth(), displayHeight()));
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if( !r.isEmpty())
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{
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Pixmap pix = (*it)->createWindowPixmap();
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XCopyArea( display(), pix, composite_pixmap, gc,
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qMax( 0, -(*it)->x()), qMax( 0, -(*it)->y()), r.width(), r.height(), r.x(), r.y());
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XFreePixmap( display(), pix );
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}
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}
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XCopyArea( display(), composite_pixmap, rootWindow(), gc, 0, 0, displayWidth(), displayHeight(), 0, 0 );
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XFreeGC( display(), gc );
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XFreePixmap( display(), composite_pixmap );
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XFlush( display());
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}
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// These functions are not used at all, SceneBasic
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// is not using inherited functionality.
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void SceneBasic::paintBackground( QRegion )
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{
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}
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void SceneBasic::windowGeometryShapeChanged( Toplevel* )
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{
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}
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void SceneBasic::windowOpacityChanged( Toplevel* )
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{
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}
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void SceneBasic::windowAdded( Toplevel* )
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{
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}
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void SceneBasic::windowDeleted( Toplevel* )
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{
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}
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} // namespace
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