kwin/effects/demo_showpicture.cpp

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/*****************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2007 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.
******************************************************************/
#include "demo_showpicture.h"
#include <kstandarddirs.h>
#include <qimage.h>
namespace KWin
{
KWIN_EFFECT( Demo_ShowPicture, ShowPictureEffect )
ShowPictureEffect::ShowPictureEffect()
: init( true )
, picture( NULL )
{
}
ShowPictureEffect::~ShowPictureEffect()
{
delete picture;
}
void ShowPictureEffect::paintScreen( int mask, QRegion region, ScreenPaintData& data )
{
effects->paintScreen( mask, region, data );
if( init )
{
loadPicture();
init = false;
}
if( picture && region.intersects( pictureRect ))
{
glPushAttrib( GL_CURRENT_BIT | GL_ENABLE_BIT );
picture->bind();
glEnable( GL_BLEND );
glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
picture->render( mask, region, pictureRect );
picture->unbind();
glPopAttrib();
}
}
void ShowPictureEffect::loadPicture()
{
QString file = KGlobal::dirs()->findResource( "appdata", "showpicture.png" );
if( file.isEmpty())
return;
QImage im( file );
QRect area = effects->clientArea( PlacementArea, QPoint( 0, 0 ), effects->currentDesktop());
picture = new GLTexture( im );
pictureRect = QRect( area.x() + ( area.width() - im.width()) / 2,
area.y() + ( area.height() - im.height()) / 2, im.width(), im.height());
}
} // namespace