void QgsContrastEnhancement::readXML( const QDomElement& elem )
{
QDomElement minValueElem = elem.firstChildElement( "minValue" );
if ( !minValueElem.isNull() )
{
mMinimumValue = minValueElem.text().toDouble();
}
QDomElement maxValueElem = elem.firstChildElement( "maxValue" );
if ( !maxValueElem.isNull() )
{
mMaximumValue = maxValueElem.text().toDouble();
}
QDomElement algorithmElem = elem.firstChildElement( "algorithm" );
if ( !algorithmElem.isNull() )
{
QString algorithmString = algorithmElem.text();
ContrastEnhancementAlgorithm algorithm = NoEnhancement;
// old version ( < 19 Apr 2013) was using enum directly -> for backward compatibility
if ( algorithmString == "0" )
{
algorithm = NoEnhancement;
}
else if ( algorithmString == "1" )
{
algorithm = StretchToMinimumMaximum;
}
else if ( algorithmString == "2" )
{
algorithm = StretchAndClipToMinimumMaximum;
}
else if ( algorithmString == "3" )
{
algorithm = ClipToMinimumMaximum;
}
else if ( algorithmString == "4" )
{
algorithm = UserDefinedEnhancement;
}
else
{
algorithm = contrastEnhancementAlgorithmFromString( algorithmString );
}
setContrastEnhancementAlgorithm( algorithm );
}
}
void QgsContrastEnhancement::readXML( const QDomElement& elem )
{
QDomElement minValueElem = elem.firstChildElement( "minValue" );
if ( !minValueElem.isNull() )
{
mMinimumValue = minValueElem.text().toDouble();
}
QDomElement maxValueElem = elem.firstChildElement( "maxValue" );
if ( !maxValueElem.isNull() )
{
mMaximumValue = maxValueElem.text().toDouble();
}
QDomElement algorithmElem = elem.firstChildElement( "algorithm" );
if ( !algorithmElem.isNull() )
{
setContrastEnhancementAlgorithm(( ContrastEnhancementAlgorithm )( algorithmElem.text().toInt() ) );
}
}
QgsContrastEnhancement::QgsContrastEnhancement( const QgsContrastEnhancement& ce )
{
mLookupTable = nullptr;
mContrastEnhancementFunction = nullptr;
mEnhancementDirty = true;
mRasterDataType = ce.mRasterDataType;
mMinimumValue = ce.mMinimumValue;
mMaximumValue = ce.mMaximumValue;
mRasterDataTypeRange = ce.mRasterDataTypeRange;
mLookupTableOffset = minimumValuePossible( mRasterDataType ) * -1;
// setContrastEnhancementAlgorithm sets also QgsContrastEnhancementFunction
setContrastEnhancementAlgorithm( ce.mContrastEnhancementAlgorithm, false );
//If the data type is larger than 16-bit do not generate a lookup table
if ( mRasterDataTypeRange <= 65535.0 )
{
mLookupTable = new int[static_cast <int>( mRasterDataTypeRange+1 )];
}
}
