qgsrastertransparency.h

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/***************************************************************************
                qgsrastertransparency.h -  description
                       -------------------
begin                : Mon Nov 30 2007
copyright            : (C) 2007 by Peter J. Ersts
email                : [email protected]
 
****************************************************************************/
 
/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
#ifndef QGSRASTERTRANSPARENCY_H
#define QGSRASTERTRANSPARENCY_H
 
#include "qgis.h"
#include "qgis_core.h"
#include "qgis_sip.h"
 
#include <QList>
#include <QString>
 
using namespace Qt::StringLiterals;
 
class QDomDocument;
class QDomElement;

class CORE_EXPORT QgsRasterTransparency
{
 
  public:
 
    QgsRasterTransparency() = default;

    struct TransparentThreeValuePixel
    {

      TransparentThreeValuePixel( double red = 0, double green = 0, double blue = 0, double opacity = 0, double fuzzyToleranceRed = 4 * std::numeric_limits<double>::epsilon(), double fuzzyToleranceGreen = 4 * std::numeric_limits<double>::epsilon(), double fuzzyToleranceBlue = 4 * std::numeric_limits<double>::epsilon() )
        : red( red )
        , green( green )
        , blue( blue )
        , opacity( opacity )
        , fuzzyToleranceRed( fuzzyToleranceRed )
        , fuzzyToleranceGreen( fuzzyToleranceGreen )
        , fuzzyToleranceBlue( fuzzyToleranceBlue )
      {}

      double red;

      double green;

      double blue;

      double opacity = 0;

#ifndef SIP_RUN
      double fuzzyToleranceRed = 4 * std::numeric_limits<double>::epsilon();
#else
      double fuzzyToleranceRed;
#endif

#ifndef SIP_RUN
      double fuzzyToleranceGreen = 4 * std::numeric_limits<double>::epsilon();
#else
      double fuzzyToleranceGreen;
#endif

#ifndef SIP_RUN
      double fuzzyToleranceBlue = 4 * std::numeric_limits<double>::epsilon();
#else
      double fuzzyToleranceBlue;
#endif
 
      bool operator==( const QgsRasterTransparency::TransparentThreeValuePixel &other ) const
      {
        return qgsDoubleNear( red, other.red )
               && qgsDoubleNear( green, other.green )
               && qgsDoubleNear( blue, other.blue )
               && qgsDoubleNear( opacity, other.opacity )
               && qgsDoubleNear( fuzzyToleranceRed, other.fuzzyToleranceRed )
               && qgsDoubleNear( fuzzyToleranceGreen, other.fuzzyToleranceGreen )
               && qgsDoubleNear( fuzzyToleranceBlue, other.fuzzyToleranceBlue );
      }
      bool operator!=( const QgsRasterTransparency::TransparentThreeValuePixel &other ) const
      {
        return !( *this == other );
      }
 
#ifdef SIP_RUN
      SIP_PYOBJECT __repr__();
      % MethodCode
      QString str;
      if ( !qgsDoubleNear( sipCpp->fuzzyToleranceRed, 0 ) || !qgsDoubleNear( sipCpp->fuzzyToleranceGreen, 0 ) || !qgsDoubleNear( sipCpp->fuzzyToleranceBlue, 0 ) )
        str = u"<QgsRasterTransparency.TransparentThreeValuePixel: %1, %2, %3, %4, %5, %6, %7>"_s.arg( sipCpp->red ).arg( sipCpp->green ).arg( sipCpp->blue ).arg( sipCpp->opacity ).arg( sipCpp->fuzzyToleranceRed ).arg( sipCpp->fuzzyToleranceGreen ).arg( sipCpp->fuzzyToleranceBlue );
      else
        str = u"<QgsRasterTransparency.TransparentThreeValuePixel: %1, %2, %3, %4>"_s.arg( sipCpp->red ).arg( sipCpp->green ).arg( sipCpp->blue ).arg( sipCpp->opacity );
      sipRes = PyUnicode_FromString( str.toUtf8().constData() );
      % End
#endif
    };

    struct TransparentSingleValuePixel
    {

      TransparentSingleValuePixel( double minimum = 0, double maximum = 0, double opacity = 0, bool includeMinimum = true, bool includeMaximum = true )
        : min( minimum )
        , max( maximum )
        , opacity( opacity )
        , includeMinimum( includeMinimum )
        , includeMaximum( includeMaximum )
      {}

      double min;

      double max;

      double opacity = 0;

      bool includeMinimum = true;

      bool includeMaximum = true;
 
      bool operator==( const QgsRasterTransparency::TransparentSingleValuePixel &other ) const
      {
        return qgsDoubleNear( min, other.min )
               && qgsDoubleNear( max, other.max )
               && qgsDoubleNear( opacity, other.opacity )
               && includeMinimum == other.includeMinimum && includeMaximum == other.includeMaximum;
      }
      bool operator!=( const QgsRasterTransparency::TransparentSingleValuePixel &other ) const
      {
        return !( *this == other );
      }
 
#ifdef SIP_RUN
      SIP_PYOBJECT __repr__();
      % MethodCode
      const QString str = u"<QgsRasterTransparency.TransparentSingleValuePixel: %1, %2, %3>"_s.arg( sipCpp->min ).arg( sipCpp->max ).arg( sipCpp->opacity );
      sipRes = PyUnicode_FromString( str.toUtf8().constData() );
      % End
#endif
    };

    QVector<QgsRasterTransparency::TransparentSingleValuePixel> transparentSingleValuePixelList() const;

    QVector<QgsRasterTransparency::TransparentThreeValuePixel> transparentThreeValuePixelList() const;

    void initializeTransparentPixelList( double value );

    void initializeTransparentPixelList( double redValue, double greenValue, double blueValue );

    void setTransparentSingleValuePixelList( const QVector<QgsRasterTransparency::TransparentSingleValuePixel> &newList );

    void setTransparentThreeValuePixelList( const QVector<QgsRasterTransparency::TransparentThreeValuePixel> &newList );

    Q_DECL_DEPRECATED int alphaValue( double value, int globalTransparency = 255 ) const SIP_DEPRECATED;

    double opacityForValue( double value ) const;

    Q_DECL_DEPRECATED int alphaValue( double redValue, double greenValue, double blueValue, int globalTransparency = 255 ) const SIP_DEPRECATED;

    double opacityForRgbValues( double redValue, double greenValue, double blueValue ) const;

    bool isEmpty() const;

    void writeXml( QDomDocument &doc, QDomElement &parentElem ) const;

    void readXml( const QDomElement &elem );
 
  private:
    QVector<QgsRasterTransparency::TransparentThreeValuePixel> mTransparentThreeValuePixelList;

    QVector<QgsRasterTransparency::TransparentSingleValuePixel> mTransparentSingleValuePixelList;
 
};
#endif