QgsRenderContext QgsRenderContext::fromMapSettings( const QgsMapSettings &mapSettings )
{
QgsRenderContext ctx;
ctx.setMapToPixel( mapSettings.mapToPixel() );
ctx.setExtent( mapSettings.visibleExtent() );
ctx.setMapExtent( mapSettings.visibleExtent() );
ctx.setFlag( DrawEditingInfo, mapSettings.testFlag( QgsMapSettings::DrawEditingInfo ) );
ctx.setFlag( ForceVectorOutput, mapSettings.testFlag( QgsMapSettings::ForceVectorOutput ) );
ctx.setFlag( UseAdvancedEffects, mapSettings.testFlag( QgsMapSettings::UseAdvancedEffects ) );
ctx.setFlag( UseRenderingOptimization, mapSettings.testFlag( QgsMapSettings::UseRenderingOptimization ) );
ctx.setCoordinateTransform( QgsCoordinateTransform() );
ctx.setSelectionColor( mapSettings.selectionColor() );
ctx.setFlag( DrawSelection, mapSettings.testFlag( QgsMapSettings::DrawSelection ) );
ctx.setFlag( DrawSymbolBounds, mapSettings.testFlag( QgsMapSettings::DrawSymbolBounds ) );
ctx.setFlag( RenderMapTile, mapSettings.testFlag( QgsMapSettings::RenderMapTile ) );
ctx.setFlag( Antialiasing, mapSettings.testFlag( QgsMapSettings::Antialiasing ) );
ctx.setFlag( RenderPartialOutput, mapSettings.testFlag( QgsMapSettings::RenderPartialOutput ) );
ctx.setFlag( RenderPreviewJob, mapSettings.testFlag( QgsMapSettings::RenderPreviewJob ) );
ctx.setScaleFactor( mapSettings.outputDpi() / 25.4 ); // = pixels per mm
ctx.setRendererScale( mapSettings.scale() );
ctx.setExpressionContext( mapSettings.expressionContext() );
ctx.setSegmentationTolerance( mapSettings.segmentationTolerance() );
ctx.setSegmentationToleranceType( mapSettings.segmentationToleranceType() );
ctx.mDistanceArea.setSourceCrs( mapSettings.destinationCrs(), mapSettings.transformContext() );
ctx.mDistanceArea.setEllipsoid( mapSettings.ellipsoid() );
ctx.setTransformContext( mapSettings.transformContext() );
ctx.setPathResolver( mapSettings.pathResolver() );
ctx.setTextRenderFormat( mapSettings.textRenderFormat() );
//this flag is only for stopping during the current rendering progress,
//so must be false at every new render operation
ctx.setRenderingStopped( false );
return ctx;
}
QgsRenderContext QgsRenderContext::fromMapSettings( const QgsMapSettings& mapSettings )
{
QgsRenderContext ctx;
ctx.setMapToPixel( mapSettings.mapToPixel() );
ctx.setExtent( mapSettings.visibleExtent() );
ctx.setFlag( DrawEditingInfo, mapSettings.testFlag( QgsMapSettings::DrawEditingInfo ) );
ctx.setFlag( ForceVectorOutput, mapSettings.testFlag( QgsMapSettings::ForceVectorOutput ) );
ctx.setFlag( UseAdvancedEffects, mapSettings.testFlag( QgsMapSettings::UseAdvancedEffects ) );
ctx.setFlag( UseRenderingOptimization, mapSettings.testFlag( QgsMapSettings::UseRenderingOptimization ) );
ctx.setCoordinateTransform( nullptr );
ctx.setSelectionColor( mapSettings.selectionColor() );
ctx.setFlag( DrawSelection, mapSettings.testFlag( QgsMapSettings::DrawSelection ) );
ctx.setFlag( DrawSymbolBounds, mapSettings.testFlag( QgsMapSettings::DrawSymbolBounds ) );
ctx.setFlag( RenderMapTile, mapSettings.testFlag( QgsMapSettings::RenderMapTile ) );
ctx.setRasterScaleFactor( 1.0 );
ctx.setScaleFactor( mapSettings.outputDpi() / 25.4 ); // = pixels per mm
ctx.setRendererScale( mapSettings.scale() );
ctx.setExpressionContext( mapSettings.expressionContext() );
//this flag is only for stopping during the current rendering progress,
//so must be false at every new render operation
ctx.setRenderingStopped( false );
return ctx;
}
QgsMapSaveDialog::QgsMapSaveDialog( QWidget *parent, QgsMapCanvas *mapCanvas, const QList<QgsDecorationItem *> &decorations, const QList< QgsAnnotation *> &annotations, DialogType type )
: QDialog( parent )
, mDialogType( type )
, mMapCanvas( mapCanvas )
, mAnnotations( annotations )
{
setupUi( this );
// Use unrotated visible extent to insure output size and scale matches canvas
QgsMapSettings ms = mMapCanvas->mapSettings();
ms.setRotation( 0 );
mExtent = ms.visibleExtent();
mDpi = ms.outputDpi();
mSize = ms.outputSize();
mResolutionSpinBox->setValue( mDpi );
mExtentGroupBox->setOutputCrs( ms.destinationCrs() );
mExtentGroupBox->setCurrentExtent( mExtent, ms.destinationCrs() );
mExtentGroupBox->setOutputExtentFromCurrent();
mExtentGroupBox->setMapCanvas( mapCanvas );
mScaleWidget->setScale( ms.scale() );
mScaleWidget->setMapCanvas( mMapCanvas );
mScaleWidget->setShowCurrentScaleButton( true );
QString activeDecorations;
Q_FOREACH ( QgsDecorationItem *decoration, decorations )
{
mDecorations << decoration;
if ( activeDecorations.isEmpty() )
activeDecorations = decoration->name().toLower();
else
activeDecorations += QStringLiteral( ", %1" ).arg( decoration->name().toLower() );
}
void QgsMapRendererJob::drawLabeling( const QgsMapSettings& settings, QgsRenderContext& renderContext, QgsPalLabeling* labelingEngine, QgsLabelingEngineV2* labelingEngine2, QPainter* painter )
{
QgsDebugMsg( "Draw labeling start" );
QTime t;
t.start();
// Reset the composition mode before rendering the labels
painter->setCompositionMode( QPainter::CompositionMode_SourceOver );
// TODO: this is not ideal - we could override rendering stopped flag that has been set in meanwhile
renderContext = QgsRenderContext::fromMapSettings( settings );
renderContext.setPainter( painter );
renderContext.setLabelingEngine( labelingEngine );
#if !defined(QGIS_DISABLE_DEPRECATED)
// old labeling - to be removed at some point...
drawOldLabeling( settings, renderContext );
#endif
drawNewLabeling( settings, renderContext, labelingEngine );
if ( labelingEngine2 )
{
// set correct extent
renderContext.setExtent( settings.visibleExtent() );
renderContext.setCoordinateTransform( nullptr );
labelingEngine2->run( renderContext );
}
QgsDebugMsg( QString( "Draw labeling took (seconds): %1" ).arg( t.elapsed() / 1000. ) );
}
void QgsMapRendererJob::drawLabeling( const QgsMapSettings& settings, QgsRenderContext& renderContext, QgsLabelingEngine* labelingEngine2, QPainter* painter )
{
QgsDebugMsg( "Draw labeling start" );
QTime t;
t.start();
// Reset the composition mode before rendering the labels
painter->setCompositionMode( QPainter::CompositionMode_SourceOver );
// TODO: this is not ideal - we could override rendering stopped flag that has been set in meanwhile
renderContext = QgsRenderContext::fromMapSettings( settings );
renderContext.setPainter( painter );
if ( labelingEngine2 )
{
// set correct extent
renderContext.setExtent( settings.visibleExtent() );
renderContext.setCoordinateTransform( QgsCoordinateTransform() );
labelingEngine2->run( renderContext );
}
QgsDebugMsg( QString( "Draw labeling took (seconds): %1" ).arg( t.elapsed() / 1000. ) );
}
QPolygonF canvasExtent( const QgsMapSettings &mapSettings )
{
QPolygonF poly;
QgsRectangle extent = mapSettings.visibleExtent();
poly << QPointF( extent.xMinimum(), extent.yMaximum() );
poly << QPointF( extent.xMaximum(), extent.yMaximum() );
poly << QPointF( extent.xMaximum(), extent.yMinimum() );
poly << QPointF( extent.xMinimum(), extent.yMinimum() );
return poly;
}
// return ratio [mu/lu] between map units and layer units
// this is of course only an approximation
double _ratioMU2LU( const QgsMapSettings& mapSettings, QgsMapLayer* layer )
{
double distMU = mapSettings.mapUnitsPerPixel();
QgsPoint ptMapCenterMU = mapSettings.visibleExtent().center();
QgsPoint ptMapCenterRightMU( ptMapCenterMU.x() + distMU, ptMapCenterMU.y() );
QgsPoint ptMapCenterLU = mapSettings.mapToLayerCoordinates( layer, ptMapCenterMU );
QgsPoint ptMapCenterRightLU = mapSettings.mapToLayerCoordinates( layer, ptMapCenterRightMU );
double distLU = sqrt( ptMapCenterLU.sqrDist( ptMapCenterRightLU ) );
double ratio = distMU / distLU;
return ratio;
}
void QgsMapRendererJob::drawNewLabeling( const QgsMapSettings& settings, QgsRenderContext& renderContext, QgsPalLabeling* labelingEngine )
{
if ( labelingEngine && !renderContext.renderingStopped() )
{
// set correct extent
renderContext.setExtent( settings.visibleExtent() );
renderContext.setCoordinateTransform( NULL );
labelingEngine->drawLabeling( renderContext );
labelingEngine->exit();
}
}
void QgsExtentGroupBox::setOutputExtentFromCurrent()
{
if ( mCanvas )
{
// Use unrotated visible extent to insure output size and scale matches canvas
QgsMapSettings ms = mCanvas->mapSettings();
ms.setRotation( 0 );
setOutputExtent( ms.visibleExtent(), ms.destinationCrs(), CurrentExtent );
}
else
{
setOutputExtent( mCurrentExtent, mCurrentCrs, CurrentExtent );
}
}
void QgsMapRendererJob::drawOldLabeling( const QgsMapSettings& settings, QgsRenderContext& renderContext )
{
// render all labels for vector layers in the stack, starting at the base
QListIterator<QString> li( settings.layers() );
li.toBack();
while ( li.hasPrevious() )
{
if ( renderContext.renderingStopped() )
{
break;
}
QString layerId = li.previous();
QgsMapLayer *ml = QgsMapLayerRegistry::instance()->mapLayer( layerId );
if ( !ml || ( ml->type() != QgsMapLayer::VectorLayer ) )
continue;
// only make labels if the layer is visible
// after scale dep viewing settings are checked
if ( ml->hasScaleBasedVisibility() && ( settings.scale() < ml->minimumScale() || settings.scale() > ml->maximumScale() ) )
continue;
bool split = false;
const QgsCoordinateTransform* ct = 0;
QgsRectangle r1 = settings.visibleExtent(), r2;
if ( settings.hasCrsTransformEnabled() )
{
ct = QgsCoordinateTransformCache::instance()->transform( ml->crs().authid(), settings.destinationCrs().authid() );
split = reprojectToLayerExtent( ct, ml->crs().geographicFlag(), r1, r2 );
}
renderContext.setCoordinateTransform( ct );
renderContext.setExtent( r1 );
ml->drawLabels( renderContext );
if ( split )
{
renderContext.setExtent( r2 );
ml->drawLabels( renderContext );
}
}
}
void QgsMapRendererJob::drawOldLabeling( const QgsMapSettings& settings, QgsRenderContext& renderContext )
{
// render all labels for vector layers in the stack, starting at the base
QListIterator<QString> li( settings.layers() );
li.toBack();
while ( li.hasPrevious() )
{
if ( renderContext.renderingStopped() )
{
break;
}
QString layerId = li.previous();
QgsMapLayer *ml = QgsMapLayerRegistry::instance()->mapLayer( layerId );
if ( !ml || ( ml->type() != QgsMapLayer::VectorLayer ) )
continue;
// only make labels if the layer is visible
// after scale dep viewing settings are checked
if ( !ml->isInScaleRange( settings.scale() ) )
continue;
const QgsCoordinateTransform* ct = nullptr;
QgsRectangle r1 = settings.visibleExtent(), r2;
if ( settings.hasCrsTransformEnabled() )
{
ct = settings.layerTransform( ml );
if ( ct )
reprojectToLayerExtent( ml, ct, r1, r2 );
}
renderContext.setCoordinateTransform( ct );
renderContext.setExtent( r1 );
ml->drawLabels( renderContext );
}
}
