#ifndef CANVASPREVIEW_H
#define CANVASPREVIEW_H

#include "software_global.h"

namespace paysages {
namespace software {

/**
 * Smaller preview of a Canvas rendering, that can be watched live.
 */
class SOFTWARESHARED_EXPORT CanvasPreview {
  public:
    CanvasPreview();
    ~CanvasPreview();

    inline int getWidth() const {
        return width;
    }
    inline int getHeight() const {
        return height;
    }
    inline const ColorProfile *getToneMapping() const {
        return profile;
    }

    const Color &getFinalPixel(int x, int y) const;

    void setSize(int real_width, int real_height, int preview_width, int preview_height);
    void setToneMapping(const ColorProfile &profile);
    void reset();

    void initLive(CanvasLiveClient *client);
    void updateLive(CanvasLiveClient *client);

    void pushPixel(int real_x, int real_y, const Color &old_color, const Color &new_color);

  protected:
    void setAllDirty();

  private:
    Mutex *lock;

    Color *pixels;
    int width;
    int height;

    ColorProfile *profile;

    int dirty_left;
    int dirty_right;
    int dirty_down;
    int dirty_up;

    bool scaled;
    double factor;
    double factor_x;
    double factor_y;
};
}
}

#endif // CANVASPREVIEW_H