qgsmapoverlayentity.h

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/***************************************************************************
  qgsmapoverlayentity.h
  --------------------------------------
  Date                 : July 2025
  Copyright            : (C) 2025 by Jean Felder
  Email                : jean dot felder at oslandia 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 QGSMAPOVERLAYENTITY_H
#define QGSMAPOVERLAYENTITY_H

 
//
//  W A R N I N G
//  -------------
//
// This file is not part of the QGIS API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
 
 
#include "qgsmapsettings.h"
#include "qgsoverlaytextureentity.h"
#include "qgsrectangle.h"
 
#include <Qt3DRender/QTextureImageDataPtr>
 
#define SIP_NO_FILE
 
class Qgs3DMapSettings;
class QgsOverlayTextureRenderView;
class QgsMapLayer;
class QgsMapOverlayTextureGenerator;
class QgsWindow3DEngine;
 

class QgsMapOverlayEntity : public QgsOverlayTextureEntity
{
    Q_OBJECT
 
  public:
    explicit QgsMapOverlayEntity( QgsWindow3DEngine *engine, QgsOverlayTextureRenderView *debugTextureRenderView, Qgs3DMapSettings *mapSettings, Qt3DCore::QNode *parent = nullptr );
 
    ~QgsMapOverlayEntity() override;

    void update( const QgsRectangle &extent, const QVector<QgsPointXY> &frustumExtent, double rotationDegrees, bool showFrustum = false );
 
  private slots:
 
    void onLayersChanged();
    void onTextureReady( const QImage &image );
    void onSizeChanged();
 
  private:
    void invalidateMapImage();
    void connectToLayersRepaintRequest();
 
    static int SIZE()
    {
      static int size = []() {
        constexpr int baseSize = 256;
        QgsMapSettings mapSettings;
        return static_cast<int>( std::round( baseSize * mapSettings.devicePixelRatio() ) );
      }();
 
      return size;
    }
 
  private:
    QgsWindow3DEngine *mEngine = nullptr;
    Qgs3DMapSettings *mMapSettings = nullptr;
    QgsMapOverlayTextureGenerator *mTextureGenerator = nullptr;
 
    Qt3DRender::QTextureImageDataPtr mImageDataPtr;

    QList<QgsMapLayer *> mLayers;
 
    QgsRectangle mExtent;
    QVector<QgsPointXY> mFrustumExtent;
    double mRotation;
    bool mShowFrustum = false;
};

 
#endif // QGSMAPOVERLAYENTITY_H