#ifndef _EXPORTER_H_
#define _EXPORTER_H_

#include <QtXml>

namespace projection
{

/**
 * Projection settings export class.
 */
class Exporter
{
public:

    /**
     * Constructor.
     *
     * @param pModel Projection model.
     */
    Exporter(ProjectionModel* pModel);

    /**
     * Destructor.
     */
    virtual ~Exporter();

    /**
     * Enable or disable soft edge blending.
     *
     * @param bSoftEdge True if soft edge blending is enabled.
     */
    void setSoftEdge(bool bSoftEdgeBlend);

    /**
     * Check whether sof edge blending is enabled or not.
     *
     * @return True if soft edge blending is enabled.
     */
    bool getSoftEdge() const { return m_bSoftEdge; }

    /**
     * Set width of the soft edge blending.
     *
     * @param blendWidth Width of the soft edge blending.
     */
    void setBlendEdgeWidth(int blendEdgeWidth);

    /**
     * Retrieve width of the soft edge blending.
     *
     * @return Width of the soft edge blending.
     */
    int  getBlendEdgeWidth() const { return m_blendEdgeWidth; }

    /**
     * Set gamma curve of blend map edge.
     *
     * @param gamma Curve exponent of blend map edge.
     */
    void setBlendEdgeExponent(float blendEdgeExponent);

    /**
     * Retrieve curve exponent of blend map edge.
     *
     * @return Curve exponent of blend map edge.
     */
    float getBlendEdgeExponent() const { return m_blendEdgeExponent; }

    /**
     * Set width of distortion map to export.
     *
     * @param width Width of distortion map to export.
     */
    void setExportWidth(int exportWidth);

    /**
     * Retrieve width of distortion map to export.
     *
     * @return Width of distortion map to export.
     */
    int  getExportWidth() const { return m_exportWidth; }

    /**
     * Set height of distortion map to export.
     *
     * @param height Height of distortion map to export.
     */
    void setExportHeight(int exportHeight);

    /**
     * Retrieve height of distortion map to export.
     *
     * @return Height of distortion map to export.
     */
    int  getExportHeight() const { return m_exportHeight; }

    /**
     * Set file name pattern of distortion map file.
     *
     * @param pattern File name pattern of distortion map file.
     */
    void setDistortMapFileNamePattern(const QString& pattern) { m_distortMapFileNamePattern = pattern; }

    /**
     * Retrieve file name pattern of distortion map file.
     *
     * @return File name pattern of distortion map file.
     */
    QString getDistortMapFileNamePattern() const { return m_distortMapFileNamePattern; }

    /**
     * Set file name pattern of blend map file.
     *
     * @param pattern File name pattern of blend map file.
     */
    void setBlendMapFileNamePattern(const QString& pattern) { m_blendMapFileNamePattern = pattern; }

    /**
     * Retrieve file name pattern of blend map file.
     *
     * @return File name pattern of blend map file.
     */
    QString getBlendMapFileNamePattern() const { return m_blendMapFileNamePattern; }

    /**
     * Set file name pattern of rendering matrix file.
     *
     * @param pattern File name pattern of view matrix file.
     */
    void setViewMatrixFileNamePattern(const QString& pattern) { m_viewMatrixFileNamePattern = pattern; }

    /**
     * Retrieve file name pattern of view matrix file.
     *
     * @return File name pattern of view matrix file.
     */
    QString getViewMatrixFileNamePattern() const { return m_viewMatrixFileNamePattern; }

    /**
     * Export projection settings to file.
     *
     * @param fileName File name of the projection settings.
     * @return True if successfully exported.
     */
    bool exportDataset(const QString& fileName);

    /**
     * Create a color encoded coordinate texture and retrieve its texture object index.
     *
     * @return Texture object index of the encoded coordinate texture.
     */
    unsigned int getTexCoordColorTexture();

    /**
     * Create a color encoded coordinate texture (green and blue channel) and retrieve its texture object index.
     *
     * @return Texture object index of the encoded coordinate texture (red channel).
     */
    unsigned int getTexCoordColorRTexture();

    /**
     * Create an edge blending texture and retrieve its texture object index.
     *
     * @return Texture object index of the edge blending texture.
     */
    unsigned int getBlendingAreaTexture();

    /**
     * Restore the export settings from XML data.
     *
     * @param element Parent XML element of the export settings data.
     */
    bool initFromDOMElement(const QDomElement& element);

    /**
     * Store the current export settings as XML data.
     *
     * @param name XML node name of the data.
     * @param doc XML document to store the data.
     * @return Current export settings data as XML data.
     */
    QDomElement domElement(const QString& name, QDomDocument& doc) const;

protected:

    bool m_bSoftEdge;                       //!< True if soft edge blending is enabled.
    int m_blendEdgeWidth;                   //!< Width of the soft edge blending.
    float m_blendEdgeExponent;              //!< Curve exponent of blend map edge.
    int m_exportWidth;                      //!< Width of distortion map to export.
    int m_exportHeight;                     //!< Height of distortion map to export.
    QString m_distortMapFileNamePattern;    //!< File name pattern of distortion map file.
    QString m_blendMapFileNamePattern;      //!< File name pattern of blend map file.
    QString m_viewMatrixFileNamePattern;    //!< File name pattern of view matrix file.

    unsigned int m_texCoordColorTexIndex;   //!< Texture object index of the encoded coordinate texture (green and blue channels).
    unsigned int m_texCoordColorRTexIndex;  //!< Texture object index of the encoded coordinate texture (red channel).
    unsigned int m_blendAreaTexIndex;       //!< Texture object index of the edge blending texture.

    ProjectionModel* m_pModel;              //!< Projection model.
};

}; // projection

#endif // _EXPORTER_H_