Source/System/FileIO/OSB/OSGNFIOQuantizer.h

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  38
  39 #ifndef _OSGNFIOQUANTIZER_H_
  40 #define _OSGNFIOQUANTIZER_H_
  41 #ifdef __sgi
  42 #pragma once
  43 #endif
  44
  45 #include "OSGBaseTypes.h"
  46
  47 OSG_BEGIN_NAMESPACE
  48
  49 /*! \brief Quantizer class.
  50           quantize reals into 8, 16, or 24 bit integers.
  51           round then left-reconstruct
  52
  53     \ingroup GrpFileIOOSB
  54     \nohierarchy
  55 */
  56
  57 class Quantizer
  58 {
  59     /*==========================  PUBLIC  =================================*/
  60   public:
  61
  62     /*---------------------------------------------------------------------*/
  63     /*! \name                  Constructor                                 */
  64     /*! \{                                                                 */
  65
  66     Quantizer(Real32 inputMin, Real32 inputMax, UInt8 res);
  67
  68     /*! \}                                                                 */
  69     /*---------------------------------------------------------------------*/
  70     /*! \name                  Encode/Decode                               */
  71     /*! \{                                                                 */
  72
  73     UInt32 encode(Real32 input       );
  74     Real32 decode(UInt32 encodedValue);
  75
  76     /*! \}                                                                 */
  77     /*---------------------------------------------------------------------*/
  78     /*! \name                    Constants                                 */
  79     /*! \{                                                                 */
  80
  81     static const UInt8 QRES_OFF;
  82     static const UInt8 QRES_8BIT;
  83     static const UInt8 QRES_16BIT;
  84     static const UInt8 QRES_24BIT;
  85
  86     /*! \}                                                                 */
  87     /*==========================  PRIVATE  ================================*/
  88
  89   private:
  90
  91     Real32 normalizeInput(Real32 input, Real32 inputMin, Real32 inputScale);
  92
  93     Real32 _inputMin;
  94     Real32 _inputMax;
  95     UInt32 _resolution;
  96     Real32 _intervalSize;
  97     Real32 _inputScale;
  98 };
  99
 100 OSG_END_NAMESPACE
 101
 102 #endif /* _OSGNFIOQUANTIZER_H_ */