tiffdensityfile.h

#ifndef TIFFDENSITYFILE_H

#define TIFFDENSITYFILE_H

#include "errut/errorbase.h"
#include <assert.h>
#include <vector>

class TIFFDensityFile : public errut::ErrorBase
{
public:
        TIFFDensityFile();
        ~TIFFDensityFile();

        // Note: everything will be converted to doubles!
        bool init(const std::string &fileName);
        int getWidth() const                                                                    { return m_width; }
        int getHeight() const                                                                   { return m_height; }
        double getValue(int x, int y) const;
private:
        bool readTiffFile(const std::string &fileName);

        int m_width, m_height;
        std::vector<double> m_values;

        class Tile
        {
        public:
                Tile()                                                                          { }
                Tile(size_t s)                                                                  { m_buffer.resize(s); }
                Tile(const Tile &src)                                                           { m_buffer = src.m_buffer; }
                float *getData()                                                                { assert(m_buffer.size() > 0); return &(m_buffer[0]); }
        private:
                std::vector<float> m_buffer;
        };
};

inline double TIFFDensityFile::getValue(int x, int y) const
{
        assert(x >= 0 && x < m_width);
        assert(y >= 0 && y < m_height);
        
        int idx = x + y*m_width;
        assert(idx >= 0 && idx < m_values.size());
        
        return m_values[idx];
}

#endif // TIFFDENSITYFILE_H