workspace/kdm/kfrontend/krootimage.cpp

   1 /*
   2
   3 Copyright (C) 1999 Matthias Hoelzer-Kluepfel <hoelzer@kde.org>
   4 Copyright (C) 2002,2004 Oswald Buddenhagen <ossi@kde.org>
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; see the file COPYING.  If not, write to
  18 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19 Boston, MA 02110-1301, USA.
  20
  21 */
  22
  23 #include "krootimage.h"
  24
  25 #include <bgdefaults.h>
  26
  27 #include <kcmdlineargs.h>
  28 #include <kconfiggroup.h>
  29 #include <kdebug.h>
  30 #include <kcomponentdata.h>
  31 #include <klocale.h>
  32
  33 #include <QDesktopWidget>
  34 #include <QFile>
  35 #include <QHash>
  36 #include <QPainter>
  37 #include <QX11Info>
  38
  39 #include <X11/Xlib.h>
  40
  41 #include <stdlib.h>
  42
  43 KVirtualBGRenderer::KVirtualBGRenderer( const KSharedConfigPtr &config )
  44 {
  45         m_pPixmap = 0;
  46         m_numRenderers = 0;
  47         m_scaleX = 1;
  48         m_scaleY = 1;
  49
  50         m_pConfig = config;
  51
  52         initRenderers();
  53         m_size = QApplication::desktop()->size();
  54 }
  55
  56 KVirtualBGRenderer::~KVirtualBGRenderer()
  57 {
  58         for (int i=0; i<m_numRenderers; ++i)
  59                 delete m_renderer[i];
  60
  61         delete m_pPixmap;
  62 }
  63
  64 KBackgroundRenderer *
  65 KVirtualBGRenderer::renderer( unsigned screen )
  66 {
  67         return m_renderer[screen];
  68 }
  69
  70 QPixmap
  71 KVirtualBGRenderer::pixmap()
  72 {
  73         if (m_numRenderers == 1)
  74                 return m_renderer[0]->pixmap();
  75
  76         return *m_pPixmap;
  77 }
  78
  79 bool
  80 KVirtualBGRenderer::needProgramUpdate()
  81 {
  82         for (int i = 0; i < m_numRenderers; i++)
  83                 if (m_renderer[i]->backgroundMode() == KBackgroundSettings::Program &&
  84                     m_renderer[i]->KBackgroundProgram::needUpdate())
  85                         return true;
  86         return false;
  87 }
  88
  89 void
  90 KVirtualBGRenderer::programUpdate()
  91 {
  92         for (int i = 0; i < m_numRenderers; i++)
  93                 if (m_renderer[i]->backgroundMode() == KBackgroundSettings::Program &&
  94                     m_renderer[i]->KBackgroundProgram::needUpdate())
  95                         m_renderer[i]->KBackgroundProgram::update();
  96 }
  97
  98 bool
  99 KVirtualBGRenderer::needWallpaperChange()
 100 {
 101         for (int i = 0; i < m_numRenderers; i++)
 102                 if (m_renderer[i]->needWallpaperChange())
 103                         return true;
 104         return false;
 105 }
 106
 107 void
 108 KVirtualBGRenderer::changeWallpaper()
 109 {
 110         for (int i = 0; i < m_numRenderers; i++)
 111                 m_renderer[i]->changeWallpaper();
 112 }
 113
 114 void
 115 KVirtualBGRenderer::desktopResized()
 116 {
 117         m_size = QApplication::desktop()->size();
 118
 119         if (m_pPixmap) {
 120                 delete m_pPixmap;
 121                 m_pPixmap = new QPixmap( m_size );
 122                 m_pPixmap->fill( Qt::black );
 123         }
 124
 125         for (int i = 0; i < m_numRenderers; i++)
 126                 m_renderer[i]->desktopResized();
 127 }
 128
 129
 130 QSize
 131 KVirtualBGRenderer::renderSize( int screen )
 132 {
 133         return m_bDrawBackgroundPerScreen ?
 134                         QApplication::desktop()->screenGeometry( screen ).size() :
 135                         QApplication::desktop()->size();
 136 }
 137
 138
 139 void
 140 KVirtualBGRenderer::initRenderers()
 141 {
 142         KConfigGroup cg( m_pConfig, "Background Common" );
 143         // Same config for each screen?
 144         // FIXME: Could use same renderer for identically-sized screens.
 145         m_bCommonScreen = cg.readEntry( "CommonScreen", _defCommonScreen );
 146         // Do not split one big image over all screens?
 147         m_bDrawBackgroundPerScreen =
 148                 cg.readEntry( "DrawBackgroundPerScreen_0", _defDrawBackgroundPerScreen );
 149
 150         m_numRenderers = m_bDrawBackgroundPerScreen ? QApplication::desktop()->numScreens() : 1;
 151
 152         m_bFinished.resize( m_numRenderers );
 153         m_bFinished.fill( false );
 154
 155         if (m_numRenderers == m_renderer.size())
 156                 return;
 157
 158         qDeleteAll(m_renderer);
 159         m_renderer.resize( m_numRenderers );
 160         for (int i = 0; i < m_numRenderers; i++) {
 161                 int eScreen = m_bCommonScreen ? 0 : i;
 162                 KBackgroundRenderer *r = new KBackgroundRenderer( eScreen, m_bDrawBackgroundPerScreen, m_pConfig );
 163                 m_renderer.insert( i, r );
 164                 r->setSize( renderSize( i ) );
 165                 connect( r, SIGNAL(imageDone( int )), SLOT(screenDone( int )) );
 166         }
 167 }
 168
 169 void
 170 KVirtualBGRenderer::load( bool reparseConfig )
 171 {
 172         initRenderers();
 173
 174         for (int i = 0; i < m_numRenderers; i++) {
 175                 int eScreen = m_bCommonScreen ? 0 : i;
 176                 m_renderer[i]->load( eScreen, m_bDrawBackgroundPerScreen, reparseConfig );
 177         }
 178 }
 179
 180 void
 181 KVirtualBGRenderer::screenDone( int screen )
 182 {
 183         m_bFinished[screen] = true;
 184
 185         if (m_pPixmap) {
 186                 // There's more than one renderer, so we are drawing each output to our own pixmap
 187
 188                 QRect overallGeometry;
 189                 for (int i = 0; i < QApplication::desktop()->numScreens(); i++)
 190                         overallGeometry |= QApplication::desktop()->screenGeometry( i );
 191
 192                 QPoint drawPos =
 193                         QApplication::desktop()->screenGeometry( screen ).topLeft() -
 194                         overallGeometry.topLeft();
 195                 drawPos.setX( int(drawPos.x() * m_scaleX) );
 196                 drawPos.setY( int(drawPos.y() * m_scaleY) );
 197
 198                 QPixmap source = m_renderer[screen]->pixmap();
 199                 QSize renderSize = this->renderSize( screen );
 200                 renderSize.setWidth( int(renderSize.width() * m_scaleX) );
 201                 renderSize.setHeight( int(renderSize.height() * m_scaleY) );
 202
 203                 QPainter p( m_pPixmap );
 204
 205                 if (renderSize == source.size())
 206                         p.drawPixmap( drawPos, source );
 207                 else
 208                         p.drawTiledPixmap( drawPos.x(), drawPos.y(),
 209                                            renderSize.width(), renderSize.height(), source );
 210
 211                 p.end();
 212         }
 213
 214         for (int i = 0; i < m_bFinished.size(); i++)
 215                 if (!m_bFinished[i])
 216                         return;
 217
 218         emit imageDone();
 219 }
 220
 221 void
 222 KVirtualBGRenderer::start()
 223 {
 224         delete m_pPixmap;
 225         m_pPixmap = 0;
 226
 227         if (m_numRenderers > 1) {
 228                 m_pPixmap = new QPixmap( m_size );
 229                 // If are screen sizes do not properly tile the overall virtual screen
 230                 // size, then we want the untiled parts to be black for use in desktop
 231                 // previews, etc
 232                 m_pPixmap->fill( Qt::black );
 233         }
 234
 235         m_bFinished.fill( false );
 236         for (int i = 0; i < m_numRenderers; i++)
 237                 m_renderer[i]->start();
 238 }
 239
 240
 241 void KVirtualBGRenderer::stop()
 242 {
 243         for (int i = 0; i < m_numRenderers; i++)
 244                 m_renderer[i]->stop();
 245 }
 246
 247
 248 void KVirtualBGRenderer::cleanup()
 249 {
 250         m_bFinished.fill( false );
 251
 252         for (int i = 0; i < m_numRenderers; i++)
 253                 m_renderer[i]->cleanup();
 254
 255         delete m_pPixmap;
 256         m_pPixmap = 0l;
 257 }
 258
 259 void KVirtualBGRenderer::saveCacheFile()
 260 {
 261         for (int i = 0; i < m_numRenderers; i++)
 262                 m_renderer[i]->saveCacheFile();
 263 }
 264
 265 void KVirtualBGRenderer::enableTiling( bool enable )
 266 {
 267         for (int i = 0; i < m_numRenderers; i++)
 268                 m_renderer[i]->enableTiling( enable );
 269 }
 270
 271
 272 MyApplication::MyApplication( const char *conf, int argc, char **argv )
 273         : QApplication( argc, argv )
 274         , renderer( KSharedConfig::openConfig( QFile::decodeName( conf ) ) )
 275 {
 276         connect( &timer, SIGNAL(timeout()), SLOT(slotTimeout()) );
 277         connect( &renderer, SIGNAL(imageDone()), this, SLOT(renderDone()) );
 278         renderer.enableTiling( true ); // optimize
 279         renderer.changeWallpaper(); // cannot do it when we're killed, so do it now
 280         timer.start( 60000 );
 281         renderer.start();
 282 }
 283
 284
 285 void
 286 MyApplication::renderDone()
 287 {
 288         QPalette palette;
 289         palette.setBrush( desktop()->backgroundRole(), QBrush( renderer.pixmap() ) );
 290         desktop()->setPalette( palette );
 291         desktop()->setAutoFillBackground( true );
 292         desktop()->setAttribute( Qt::WA_PaintOnScreen );
 293         desktop()->show();
 294         desktop()->repaint();
 295
 296         renderer.saveCacheFile();
 297         renderer.cleanup();
 298         for (unsigned i = 0; i < renderer.numRenderers(); ++i) {
 299                 KBackgroundRenderer *r = renderer.renderer( i );
 300                 if (r->backgroundMode() == KBackgroundSettings::Program ||
 301                     (r->multiWallpaperMode() != KBackgroundSettings::NoMulti &&
 302                      r->multiWallpaperMode() != KBackgroundSettings::NoMultiRandom))
 303                         return;
 304         }
 305         quit();
 306 }
 307
 308 void
 309 MyApplication::slotTimeout()
 310 {
 311         bool change = false;
 312
 313         if (renderer.needProgramUpdate()) {
 314                 renderer.programUpdate();
 315                 change = true;
 316         }
 317
 318         if (renderer.needWallpaperChange()) {
 319                 renderer.changeWallpaper();
 320                 change = true;
 321         }
 322
 323         if (change)
 324                 renderer.start();
 325 }
 326
 327 int
 328 main( int argc, char *argv[] )
 329 {
 330         KCmdLineArgs::init( argc, argv, "krootimage", "kdmgreet",
 331                             ki18n("KRootImage"), QByteArray(),
 332                             ki18n("Fancy desktop background for kdm") );
 333
 334         KCmdLineOptions options;
 335         options.add( "+config", ki18n("Name of the configuration file") );
 336         KCmdLineArgs::addCmdLineOptions( options );
 337
 338         KCmdLineArgs *args = KCmdLineArgs::parsedArgs();
 339         if (!args->count())
 340                 args->usage();
 341         KComponentData inst( KCmdLineArgs::aboutData() );
 342         MyApplication app( args->arg( 0 ).toLocal8Bit(),
 343                            KCmdLineArgs::qtArgc(), KCmdLineArgs::qtArgv() );
 344         args->clear();
 345
 346         app.exec();
 347         app.flush();
 348
 349         // Keep color resources after termination
 350         XSetCloseDownMode( QX11Info::display(), RetainTemporary );
 351
 352         return 0;
 353 }
 354
 355 #include "krootimage.moc"