QgsRasterRenderer *QgsSingleBandGrayRenderer::create( const QDomElement &elem, QgsRasterInterface *input )
{
if ( elem.isNull() )
{
return nullptr;
}
int grayBand = elem.attribute( QStringLiteral( "grayBand" ), QStringLiteral( "-1" ) ).toInt();
QgsSingleBandGrayRenderer *r = new QgsSingleBandGrayRenderer( input, grayBand );
r->readXml( elem );
if ( elem.attribute( QStringLiteral( "gradient" ) ) == QLatin1String( "WhiteToBlack" ) )
{
r->setGradient( WhiteToBlack ); // BlackToWhite is default
}
QDomElement contrastEnhancementElem = elem.firstChildElement( QStringLiteral( "contrastEnhancement" ) );
if ( !contrastEnhancementElem.isNull() )
{
QgsContrastEnhancement *ce = new QgsContrastEnhancement( ( Qgis::DataType )(
input->dataType( grayBand ) ) );
ce->readXml( contrastEnhancementElem );
r->setContrastEnhancement( ce );
}
return r;
}
QgsRasterRenderer *QgsMultiBandColorRenderer::create( const QDomElement &elem, QgsRasterInterface *input )
{
if ( elem.isNull() )
{
return nullptr;
}
//red band, green band, blue band
int redBand = elem.attribute( QStringLiteral( "redBand" ), QStringLiteral( "-1" ) ).toInt();
int greenBand = elem.attribute( QStringLiteral( "greenBand" ), QStringLiteral( "-1" ) ).toInt();
int blueBand = elem.attribute( QStringLiteral( "blueBand" ), QStringLiteral( "-1" ) ).toInt();
//contrast enhancements
QgsContrastEnhancement *redContrastEnhancement = nullptr;
QDomElement redContrastElem = elem.firstChildElement( QStringLiteral( "redContrastEnhancement" ) );
if ( !redContrastElem.isNull() )
{
redContrastEnhancement = new QgsContrastEnhancement( ( Qgis::DataType )(
input->dataType( redBand ) ) );
redContrastEnhancement->readXml( redContrastElem );
}
QgsContrastEnhancement *greenContrastEnhancement = nullptr;
QDomElement greenContrastElem = elem.firstChildElement( QStringLiteral( "greenContrastEnhancement" ) );
if ( !greenContrastElem.isNull() )
{
greenContrastEnhancement = new QgsContrastEnhancement( ( Qgis::DataType )(
input->dataType( greenBand ) ) );
greenContrastEnhancement->readXml( greenContrastElem );
}
QgsContrastEnhancement *blueContrastEnhancement = nullptr;
QDomElement blueContrastElem = elem.firstChildElement( QStringLiteral( "blueContrastEnhancement" ) );
if ( !blueContrastElem.isNull() )
{
blueContrastEnhancement = new QgsContrastEnhancement( ( Qgis::DataType )(
input->dataType( blueBand ) ) );
blueContrastEnhancement->readXml( blueContrastElem );
}
QgsRasterRenderer *r = new QgsMultiBandColorRenderer( input, redBand, greenBand, blueBand, redContrastEnhancement,
greenContrastEnhancement, blueContrastEnhancement );
r->readXml( elem );
return r;
}