maprenderjob.h

Go to the documentation of this file.

 
#ifndef MAPRENDERJOB_H
#define MAPRENDERJOB_H
 
#include "map/mapextent.h"
 
#include <QImage>
#include <QList>
#include <QObject>
#include <QSize>
 
#include <atomic>
#include <memory>
 
class OpenSWMMVisLayer;
class SpatialReferenceSystem;
 
class MapRenderJob : public QObject
{
    Q_OBJECT
 
public:
 
    MapRenderJob(const QList<OpenSWMMVisLayer *> &layers,
                 const MapExtent &extent,
                 const QSize &imageSize,
                 qreal devicePixelRatio,
                 SpatialReferenceSystem *srs,
                 const QColor &bgColor,
                 QObject *parent = nullptr);
 
    ~MapRenderJob() override = default;
 
    void start();
 
    void cancel();
 
    [[nodiscard]] bool isCancelled() const { return m_cancelled->load(); }
 
signals:
 
    void finished(QImage result);
 
private:
    void run();
 
    QList<OpenSWMMVisLayer *>    m_layers;
    MapExtent                m_extent;
    QSize                    m_imageSize;
    qreal                    m_dpr { 1.0 };
    SpatialReferenceSystem  *m_srs;
    QColor                   m_bgColor;
    bool                     m_started   { false };
    // Shared with the worker lambda. Survives the job's destruction so the
    // worker can keep checking it after `delete m_renderJob` from the GUI.
    std::shared_ptr<std::atomic<bool>> m_cancelled
        { std::make_shared<std::atomic<bool>>(false) };
};
 
#endif // MAPRENDERJOB_H