volumeloader.h

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#ifndef VOLUMELOADER_H
#define VOLUMELOADER_H

#include <QObject>

struct VolumeMetaData
{
    QString name;

    enum class VolumeDataType
    {
        uchar=8,
        ushort=16
    } type;

    //the actual amount of data used for each voxel, if different from the data type
    //if zero, means that the full value range is used
    uchar actualBits;

    //maps to x, y, z coordinates
    uint width;
    uint height;
    uint depth;

    //aspect ratios, currently not used
    float aspectX;
    float aspectY;
    float aspectZ;

    //how many bytes to skip in the datafile (removing custom headers)
    uint skipBytes;
    QString dataFile;

    //identification of volume source
    QString source;

    inline static QString enumToString(const VolumeDataType type)
    {
        switch (type)
        {
        case VolumeDataType::uchar:
            return "uchar";
        case VolumeDataType::ushort:
            return "ushort";
        default:
            return "unknown";
        }
    }

    inline static VolumeDataType stringToEnum(const QString& str)
    {
        if(str.compare("ushort",Qt::CaseInsensitive)==0)
            return VolumeDataType::ushort;
        else
            return VolumeDataType::uchar;
    }
};

class VolumeLoader : public QObject
{
    Q_OBJECT
public:
    explicit VolumeLoader(QObject *parent = nullptr);
    ~VolumeLoader();

    bool getMetadata(const QFile& metadataFile,VolumeMetaData& metadata) const;

    QByteArray readVolume(const VolumeMetaData& d) const;
private:
    bool readGZippedVolume(QFile& src,QByteArray& dest) const;
};

QDebug operator<<(QDebug dbg, const VolumeMetaData& c);

#endif // VOLUMELOADER_H