void QgsMapRendererParallelJob::start()
{
if ( isActive() )
return;
mRenderingStart.start();
mStatus = RenderingLayers;
mLabelingEngineV2.reset();
if ( mSettings.testFlag( QgsMapSettings::DrawLabeling ) )
{
mLabelingEngineV2.reset( new QgsLabelingEngine() );
mLabelingEngineV2->setMapSettings( mSettings );
}
bool canUseLabelCache = prepareLabelCache();
mLayerJobs = prepareJobs( nullptr, mLabelingEngineV2.get() );
mLabelJob = prepareLabelingJob( nullptr, mLabelingEngineV2.get(), canUseLabelCache );
QgsDebugMsg( QString( "QThreadPool max thread count is %1" ).arg( QThreadPool::globalInstance()->maxThreadCount() ) );
// start async job
connect( &mFutureWatcher, &QFutureWatcher<void>::finished, this, &QgsMapRendererParallelJob::renderLayersFinished );
mFuture = QtConcurrent::map( mLayerJobs, renderLayerStatic );
mFutureWatcher.setFuture( mFuture );
}
void QgsMapRendererCustomPainterJob::start()
{
if ( isActive() )
return;
mRenderingStart.start();
mActive = true;
mErrors.clear();
QgsDebugMsg( "QPAINTER run!" );
QgsDebugMsg( "Preparing list of layer jobs for rendering" );
QTime prepareTime;
prepareTime.start();
// clear the background
mPainter->fillRect( 0, 0, mSettings.outputSize().width(), mSettings.outputSize().height(), mSettings.backgroundColor() );
mPainter->setRenderHint( QPainter::Antialiasing, mSettings.testFlag( QgsMapSettings::Antialiasing ) );
QPaintDevice* thePaintDevice = mPainter->device();
QString errMsg = QString( "pre-set DPI not equal to painter's DPI (%1 vs %2)" ).arg( thePaintDevice->logicalDpiX() ).arg( mSettings.outputDpi() );
Q_ASSERT_X( thePaintDevice->logicalDpiX() == mSettings.outputDpi(), "Job::startRender()", errMsg.toAscii().data() );
delete mLabelingEngine;
mLabelingEngine = 0;
if ( mSettings.testFlag( QgsMapSettings::DrawLabeling ) )
{
mLabelingEngine = new QgsPalLabeling;
mLabelingEngine->loadEngineSettings();
mLabelingEngine->init( mSettings );
}
mLayerJobs = prepareJobs( mPainter, mLabelingEngine );
QgsDebugMsg( "Rendering prepared in (seconds): " + QString( "%1" ).arg( prepareTime.elapsed() / 1000.0 ) );
// now we are ready to start rendering!
if ( !mLayerJobs.isEmpty() )
{
connect( &mFutureWatcher, SIGNAL( finished() ), SLOT( futureFinished() ) );
mFuture = QtConcurrent::run( staticRender, this );
mFutureWatcher.setFuture( mFuture );
}
else
{
// just make sure we will clean up and emit finished() signal
QTimer::singleShot( 0, this, SLOT( futureFinished() ) );
}
}
void QgsMapRendererCustomPainterJob::start()
{
if ( isActive() )
return;
mRenderingStart.start();
mActive = true;
mErrors.clear();
QgsDebugMsg( "QPAINTER run!" );
QgsDebugMsg( "Preparing list of layer jobs for rendering" );
QTime prepareTime;
prepareTime.start();
// clear the background
mPainter->fillRect( 0, 0, mSettings.outputSize().width(), mSettings.outputSize().height(), mSettings.backgroundColor() );
mPainter->setRenderHint( QPainter::Antialiasing, mSettings.testFlag( QgsMapSettings::Antialiasing ) );
#ifndef QT_NO_DEBUG
QPaintDevice* thePaintDevice = mPainter->device();
QString errMsg = QStringLiteral( "pre-set DPI not equal to painter's DPI (%1 vs %2)" ).arg( thePaintDevice->logicalDpiX() ).arg( mSettings.outputDpi() );
Q_ASSERT_X( qgsDoubleNear( thePaintDevice->logicalDpiX(), mSettings.outputDpi() ), "Job::startRender()", errMsg.toLatin1().data() );
#endif
delete mLabelingEngineV2;
mLabelingEngineV2 = nullptr;
if ( mSettings.testFlag( QgsMapSettings::DrawLabeling ) )
{
mLabelingEngineV2 = new QgsLabelingEngine();
mLabelingEngineV2->readSettingsFromProject();
mLabelingEngineV2->setMapSettings( mSettings );
}
mLayerJobs = prepareJobs( mPainter, mLabelingEngineV2 );
QgsDebugMsg( "Rendering prepared in (seconds): " + QString( "%1" ).arg( prepareTime.elapsed() / 1000.0 ) );
if ( mRenderSynchronously )
{
// do the rendering right now!
doRender();
return;
}
// now we are ready to start rendering!
connect( &mFutureWatcher, SIGNAL( finished() ), SLOT( futureFinished() ) );
mFuture = QtConcurrent::run( staticRender, this );
mFutureWatcher.setFuture( mFuture );
}
void QgsMapRendererParallelJob::start()
{
if ( isActive() )
return;
mRenderingStart.start();
mStatus = RenderingLayers;
delete mLabelingEngine;
mLabelingEngine = nullptr;
delete mLabelingEngineV2;
mLabelingEngineV2 = nullptr;
if ( mSettings.testFlag( QgsMapSettings::DrawLabeling ) )
{
#ifdef LABELING_V2
mLabelingEngineV2 = new QgsLabelingEngineV2();
mLabelingEngineV2->readSettingsFromProject();
mLabelingEngineV2->setMapSettings( mSettings );
#else
mLabelingEngine = new QgsPalLabeling;
mLabelingEngine->loadEngineSettings();
mLabelingEngine->init( mSettings );
#endif
}
mLayerJobs = prepareJobs( nullptr, mLabelingEngine, mLabelingEngineV2 );
// prepareJobs calls mapLayer->createMapRenderer may involve cloning a RasterDataProvider,
// whose constructor may need to download some data (i.e. WMS, AMS) and doing so runs a
// QEventLoop waiting for the network request to complete. If unluckily someone calls
// mapCanvas->refresh() while this is happening, QgsMapRendererCustomPainterJob::cancel is
// called, deleting the QgsMapRendererCustomPainterJob while this function is running.
// Hence we need to check whether the job is still active before proceeding
if ( !isActive() )
return;
QgsDebugMsg( QString( "QThreadPool max thread count is %1" ).arg( QThreadPool::globalInstance()->maxThreadCount() ) );
// start async job
connect( &mFutureWatcher, SIGNAL( finished() ), SLOT( renderLayersFinished() ) );
mFuture = QtConcurrent::map( mLayerJobs, renderLayerStatic );
mFutureWatcher.setFuture( mFuture );
}
void QgsMapRendererParallelJob::start()
{
if ( isActive() )
return;
mRenderingStart.start();
mStatus = RenderingLayers;
delete mLabelingEngine;
mLabelingEngine = nullptr;
delete mLabelingEngineV2;
mLabelingEngineV2 = nullptr;
if ( mSettings.testFlag( QgsMapSettings::DrawLabeling ) )
{
#ifdef LABELING_V2
mLabelingEngineV2 = new QgsLabelingEngineV2();
mLabelingEngineV2->readSettingsFromProject();
mLabelingEngineV2->setMapSettings( mSettings );
#else
mLabelingEngine = new QgsPalLabeling;
mLabelingEngine->loadEngineSettings();
mLabelingEngine->init( mSettings );
#endif
}
mLayerJobs = prepareJobs( nullptr, mLabelingEngine, mLabelingEngineV2 );
QgsDebugMsg( QString( "QThreadPool max thread count is %1" ).arg( QThreadPool::globalInstance()->maxThreadCount() ) );
// start async job
connect( &mFutureWatcher, SIGNAL( finished() ), SLOT( renderLayersFinished() ) );
mFuture = QtConcurrent::map( mLayerJobs, renderLayerStatic );
mFutureWatcher.setFuture( mFuture );
}
void QgsMapRendererCustomPainterJob::start()
{
if ( isActive() )
return;
mRenderingStart.start();
mActive = true;
mErrors.clear();
QgsDebugMsg( "QPAINTER run!" );
QgsDebugMsg( "Preparing list of layer jobs for rendering" );
QTime prepareTime;
prepareTime.start();
// clear the background
mPainter->fillRect( 0, 0, mSettings.outputSize().width(), mSettings.outputSize().height(), mSettings.backgroundColor() );
mPainter->setRenderHint( QPainter::Antialiasing, mSettings.testFlag( QgsMapSettings::Antialiasing ) );
#ifndef QT_NO_DEBUG
QPaintDevice* thePaintDevice = mPainter->device();
QString errMsg = QString( "pre-set DPI not equal to painter's DPI (%1 vs %2)" ).arg( thePaintDevice->logicalDpiX() ).arg( mSettings.outputDpi() );
Q_ASSERT_X( qgsDoubleNear( thePaintDevice->logicalDpiX(), mSettings.outputDpi() ), "Job::startRender()", errMsg.toAscii().data() );
#endif
delete mLabelingEngine;
mLabelingEngine = nullptr;
delete mLabelingEngineV2;
mLabelingEngineV2 = nullptr;
if ( mSettings.testFlag( QgsMapSettings::DrawLabeling ) )
{
#ifdef LABELING_V2
mLabelingEngineV2 = new QgsLabelingEngineV2();
mLabelingEngineV2->readSettingsFromProject();
mLabelingEngineV2->setMapSettings( mSettings );
#else
mLabelingEngine = new QgsPalLabeling;
mLabelingEngine->loadEngineSettings();
mLabelingEngine->init( mSettings );
#endif
}
mLayerJobs = prepareJobs( mPainter, mLabelingEngine, mLabelingEngineV2 );
// prepareJobs calls mapLayer->createMapRenderer may involve cloning a RasterDataProvider,
// whose constructor may need to download some data (i.e. WMS, AMS) and doing so runs a
// QEventLoop waiting for the network request to complete. If unluckily someone calls
// mapCanvas->refresh() while this is happening, QgsMapRendererCustomPainterJob::cancel is
// called, deleting the QgsMapRendererCustomPainterJob while this function is running.
// Hence we need to check whether the job is still active before proceeding
if ( !isActive() )
return;
QgsDebugMsg( "Rendering prepared in (seconds): " + QString( "%1" ).arg( prepareTime.elapsed() / 1000.0 ) );
if ( mRenderSynchronously )
{
// do the rendering right now!
doRender();
return;
}
// now we are ready to start rendering!
connect( &mFutureWatcher, SIGNAL( finished() ), SLOT( futureFinished() ) );
mFuture = QtConcurrent::run( staticRender, this );
mFutureWatcher.setFuture( mFuture );
}