tb_dimension.h

// ================================================================================
// ==      This file is a part of Turbo Badger. (C) 2011-2014, Emil Segerås      ==
// ==                     See tb_core.h for more information.                    ==
// ================================================================================

#ifndef TB_DIMENSION_H
#define TB_DIMENSION_H

#include "tb_types.h"
#include "tb_debug.h"
#include "tb_str.h"

namespace tb {

#define TB_INVALID_DIMENSION -5555

class TBTempBuffer;
class TBValue;

class TBDimensionConverter
{
    int m_src_dpi; 
    int m_dst_dpi; 
    TBStr m_dst_dpi_str; 
public:
    TBDimensionConverter() : m_src_dpi(100), m_dst_dpi(100) {}

    void SetDPI(int src_dpi, int dst_dpi);

    int GetSrcDPI() const { return m_src_dpi; }

    int GetDstDPI() const { return m_dst_dpi; }

    const TBStr & GetDstDPIStr() const { return m_dst_dpi_str; }

    void GetDstDPIFilename(const char *filename, TBTempBuffer *tempbuf) const;

    bool NeedConversion() const { return m_src_dpi != m_dst_dpi; }

    int DpToPx(int dp) const;

    int MmToPx(int mm) const;

    int GetPxFromString(const TBStr & str, int def_value) const;

    int GetPxFromValue(TBValue *value, int def_value) const;
};

} // namespace tb

#endif // TB_DIMENSION_H