QgsRasterRenderer* QgsSingleBandGrayRenderer::create( const QDomElement& elem, QgsRasterInterface* input )
{
if ( elem.isNull() )
{
return 0;
}
int grayBand = elem.attribute( "grayBand", "-1" ).toInt();
QgsSingleBandGrayRenderer* r = new QgsSingleBandGrayRenderer( input, grayBand );
r->readXML( elem );
if ( elem.attribute( "gradient" ) == "WhiteToBlack" )
{
r->setGradient( WhiteToBlack ); // BlackToWhite is default
}
QDomElement contrastEnhancementElem = elem.firstChildElement( "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 0;
}
//red band, green band, blue band
int redBand = elem.attribute( "redBand", "-1" ).toInt();
int greenBand = elem.attribute( "greenBand", "-1" ).toInt();
int blueBand = elem.attribute( "blueBand", "-1" ).toInt();
//contrast enhancements
QgsContrastEnhancement* redContrastEnhancement = 0;
QDomElement redContrastElem = elem.firstChildElement( "redContrastEnhancement" );
if ( !redContrastElem.isNull() )
{
redContrastEnhancement = new QgsContrastEnhancement(( QgsContrastEnhancement::QgsRasterDataType )(
input->dataType( redBand ) ) );
redContrastEnhancement->readXML( redContrastElem );
}
QgsContrastEnhancement* greenContrastEnhancement = 0;
QDomElement greenContrastElem = elem.firstChildElement( "greenContrastEnhancement" );
if ( !greenContrastElem.isNull() )
{
greenContrastEnhancement = new QgsContrastEnhancement(( QgsContrastEnhancement::QgsRasterDataType )(
input->dataType( greenBand ) ) );
greenContrastEnhancement->readXML( greenContrastElem );
}
QgsContrastEnhancement* blueContrastEnhancement = 0;
QDomElement blueContrastElem = elem.firstChildElement( "blueContrastEnhancement" );
if ( !blueContrastElem.isNull() )
{
blueContrastEnhancement = new QgsContrastEnhancement(( QgsContrastEnhancement::QgsRasterDataType )(
input->dataType( blueBand ) ) );
blueContrastEnhancement->readXML( blueContrastElem );
}
QgsRasterRenderer* r = new QgsMultiBandColorRenderer( input, redBand, greenBand, blueBand, redContrastEnhancement,
greenContrastEnhancement, blueContrastEnhancement );
r->readXML( elem );
return r;
}