QtColorTranslator.hh

/*===========================================================================*\
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/*===========================================================================*\
 *                                                                           *
 *   $Revision: 6743 $                                                       *
 *   $Author: moebius $                                                      *
 *   $Date: 2009-08-05 11:03:10 +0200 (Mi, 05. Aug 2009) $                   *
 *                                                                           *
\*===========================================================================*/



//=============================================================================
//
//  CLASS QtColorTranslator
//
//=============================================================================


#ifndef ACG_QTCOLORTRANSLATOR_HH
#define ACG_QTCOLORTRANSLATOR_HH


//== INCLUDES =================================================================

#include <QGLContext>
#include "../Config/ACGDefines.hh"

//== NAMESPACES ===============================================================

namespace ACG {


//== CLASS DEFINITION =========================================================


class ACGDLLEXPORT QtColorTranslator
{
public:

  QtColorTranslator()
    : initialized_(false) {};

  QtColorTranslator(QGLContext& _context)
  { initialize(_context); }

  ~QtColorTranslator(){};


  void initialize();

  void initialize(QGLContext& _context)
  { _context.makeCurrent();  initialize(); }

  bool initialized() const { return initialized_; }


  bool index2color( unsigned int _idx, QRgb& _col ) const;
  bool index2color( unsigned int _idx,
                    QRgb& _frontColor,
                    QRgb& _backColor ) const;


  int color2index( QRgb _c ) const;
  int color2index( QRgb _frontColor, QRgb _backColor ) const;


  unsigned int maxIndex() const;


private:

  bool     initialized_;
  GLint    redBits_, greenBits_, blueBits_;
  GLuint   redMask_, greenMask_, blueMask_,
           redShift_, greenShift_, blueShift_,
           redRound_, greenRound_, blueRound_;
};


//=============================================================================
} // namespace ACG
//=============================================================================
#endif // ACG_QTCOLORTRANSLATOR_HH defined
//=============================================================================