qgsrasterlayerprofilegenerator.h

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/***************************************************************************
                         qgsrasterlayerprofilegenerator.h
                         ---------------
    begin                : March 2022
    copyright            : (C) 2022 by Nyall Dawson
    email                : nyall dot dawson at gmail dot com
 ***************************************************************************/
 
/***************************************************************************
 *                                                                         *
 *   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 QGSRASTERLAYERPROFILEGENERATOR_H
#define QGSRASTERLAYERPROFILEGENERATOR_H
 
#include <memory>
 
#include "qgis_core.h"
#include "qgis_sip.h"
#include "qgsabstractprofilesurfacegenerator.h"
#include "qgscoordinatereferencesystem.h"
#include "qgscoordinatetransformcontext.h"
#include "qgscurve.h"
 
class QgsProfileRequest;
class QgsRasterLayer;
class QgsRasterDataProvider;
class QgsRasterBlockFeedback;
class QgsLineSymbol;
class QgsProfileSnapContext;
 
#define SIP_NO_FILE

class CORE_EXPORT QgsRasterLayerProfileResults : public QgsAbstractProfileSurfaceResults
{
 
  public:
 
    QString type() const override;
    using QgsAbstractProfileSurfaceResults::identify;
    QVector<QgsProfileIdentifyResults> identify( const QgsProfilePoint &point, const QgsProfileIdentifyContext &context ) override;
 
  private:
 
    QPointer< QgsRasterLayer > mLayer;
 
    friend class QgsRasterLayerProfileGenerator;
};

class CORE_EXPORT QgsRasterLayerProfileGenerator : public QgsAbstractProfileSurfaceGenerator
{
 
  public:

    QgsRasterLayerProfileGenerator( QgsRasterLayer *layer, const QgsProfileRequest &request );
 
    ~QgsRasterLayerProfileGenerator() override;
 
    QString sourceId() const override;
    Qgis::ProfileGeneratorFlags flags() const override;
    bool generateProfile( const QgsProfileGenerationContext &context = QgsProfileGenerationContext() ) override;
    QgsAbstractProfileResults *takeResults() override;
    QgsFeedback *feedback() const override;
 
  private:
    QString mId;
    std::unique_ptr<QgsRasterBlockFeedback> mFeedback;
 
    std::unique_ptr< QgsCurve > mProfileCurve;
 
    QgsCoordinateReferenceSystem mSourceCrs;
    QgsCoordinateReferenceSystem mTargetCrs;
    QgsCoordinateTransformContext mTransformContext;
 
    double mOffset = 0;
    double mScale = 1;
 
    QPointer< QgsRasterLayer > mLayer;
    std::unique_ptr< QgsRasterDataProvider > mRasterProvider;
 
    std::unique_ptr< QgsRasterLayerProfileResults > mResults;
 
    int mBand = 1;
    double mRasterUnitsPerPixelX = 1;
    double mRasterUnitsPerPixelY = 1;
 
    double mStepDistance = std::numeric_limits<double>::quiet_NaN();
 
    friend class QgsRasterLayerProfileResults;
 
};
 
#endif // QGSRASTERLAYERPROFILEGENERATOR_H