cv::Mat extract_region(const cv::Mat& m, const cv::RotatedRect& ir, bool flipped, int interpolation, int bordertype, int value){
cv::Mat M, enlarged, rotated, cropped;
cv::Rect margins;
cv::RotatedRect pos_in_enlarged;
boost::tie(margins,pos_in_enlarged) = required_padding(m, ir);
cv::copyMakeBorder(m, enlarged,
margins.y, margins.height, margins.x, margins.width,
bordertype, value);
cv::Size rect_size = pos_in_enlarged.size;
float angle = pos_in_enlarged.angle;
if(angle == 0.){
cv::Rect rr(
pos_in_enlarged.center.x - pos_in_enlarged.size.width/2,
pos_in_enlarged.center.y - pos_in_enlarged.size.height/2,
pos_in_enlarged.size.width, pos_in_enlarged.size.height);
cropped = enlarged(rr);
}
else{
if (pos_in_enlarged.angle < -45.) {
angle += 90.0;
std::swap(rect_size.width, rect_size.height);
}
M = cv::getRotationMatrix2D(pos_in_enlarged.center, angle, 1.0);
cv::warpAffine(enlarged, rotated, M, enlarged.size(), interpolation);
cv::getRectSubPix(rotated, rect_size, pos_in_enlarged.center, cropped);
assert(cropped.rows == cropped.cols);
}
if(flipped)
cv::flip(cropped, cropped, 1);
if(!cropped.isContinuous())
cropped = cropped.clone();
return cropped;
}
void QgsSizeScaleWidget::updatePreview()
{
if ( !mSymbol || !mLayer )
return;
QScopedPointer<QgsScaleExpression> expr( createExpression() );
QList<double> breaks = QgsSymbolLayerV2Utils::prettyBreaks( expr->minValue(), expr->maxValue(), 4 );
treeView->setIconSize( QSize( 512, 512 ) );
mPreviewList.clear();
int widthMax = 0;
for ( int i = 0; i < breaks.length(); i++ )
{
QScopedPointer< QgsMarkerSymbolV2 > symbol( dynamic_cast<QgsMarkerSymbolV2*>( mSymbol->clone() ) );
symbol->setDataDefinedSize( QgsDataDefined() );
symbol->setDataDefinedAngle( QgsDataDefined() ); // to avoid symbol not beeing drawn
symbol->setSize( expr->size( breaks[i] ) );
QgsSymbolV2LegendNode node( mLayerTreeLayer, QgsLegendSymbolItemV2( symbol.data(), QString::number( i ), 0 ) );
const QSize sz( node.minimumIconSize() );
node.setIconSize( sz );
QScopedPointer< QStandardItem > item( new QStandardItem( node.data( Qt::DecorationRole ).value<QPixmap>(), QString::number( breaks[i] ) ) );
widthMax = qMax( sz.width(), widthMax );
mPreviewList.appendRow( item.take() );
}
// center icon and align text left by giving icons the same width
// @todo maybe add some space so that icons don't touch
for ( int i = 0; i < breaks.length(); i++ )
{
QPixmap img( mPreviewList.item( i )->icon().pixmap( mPreviewList.item( i )->icon().actualSize( QSize( 512, 512 ) ) ) );
QPixmap enlarged( widthMax, img.height() );
// fill transparent and add original image
enlarged.fill( Qt::transparent );
QPainter p( &enlarged );
p.drawPixmap( QPoint(( widthMax - img.width() ) / 2, 0 ), img );
p.end();
mPreviewList.item( i )->setIcon( enlarged );
}
}
box enlarged(typename vector_type::value_type scalar) const
{
return enlarged(
boost::numeric::ublas::scalar_vector<typename vector_type::value_type>(
m_lower.size(), scalar));
}
