lti_utils.h

Go to the documentation of this file.

/* $Id$ */
/* //////////////////////////////////////////////////////////////////////////
//                                                                         //
// This code is Copyright (c) 2004 LizardTech, Inc, 1008 Western Avenue,   //
// Suite 200, Seattle, WA 98104.  Unauthorized use or distribution         //
// prohibited.  Access to and use of this code is permitted only under     //
// license from LizardTech, Inc.  Portions of the code are protected by    //
// US and foreign patents and other filings. All Rights Reserved.          //
//                                                                         //
/* PUBLIC */

#ifndef LTI_UTILS_H
#define LTI_UTILS_H


// lt_lib_mrsid_core
#include "lti_types.h"

LT_BEGIN_NAMESPACE(LizardTech)
#define LTI_DEFAULT_MAG_SNAP_THRESHOLD 0.41503749927884381

class LTIUtils
{
public:
   static lt_uint8 getMinNumSamplesPerPixel(LTIColorSpace colorspace);

#if 1 //JAH deprecate

   static LTIColorSpace getColorSpaceWithoutAlpha(LTIColorSpace colorspace);

   static bool hasAlphaBand(LTIColorSpace colorspace);
#endif

   static lt_uint8 getNumBytes(LTIDataType datatype);

   static bool isSigned(LTIDataType datatype);

   static bool isIntegral(LTIDataType datatype);
   static bool isFloatingPoint(LTIDataType datatype);

   static double getMinValue(LTIDataType datatype);
   static double getMaxValue(LTIDataType datatype);

   static bool needsSwapping(LTIDataType datatype, LTIEndian byteOrder);


   static void convertWindowLevelToMinMax(double window, double level,
                                          double& drmin, double& drmax);

   static void convertMinMaxToWindowLevel(double drmin, double drmax,
                                          double& window, double& level);

   static lt_int32 magToLevel(double mag);

   static double levelToMag(lt_int32 level);

   static double snapToOctave(double mag, double threshold = LTI_DEFAULT_MAG_SNAP_THRESHOLD);

   static double snapToOctave(double mag, const LTIImageStage &imageStage, double threshold = LTI_DEFAULT_MAG_SNAP_THRESHOLD);

   static bool isOctave(double mag);

   
   static lt_uint8 getNumLevelsForIcon(lt_uint32 width,
                                       lt_uint32 height,
                                       lt_uint32 iconsize);

   static double getMagForIcon(lt_uint32 width,
                               lt_uint32 height,
                               lt_uint32 iconsize);

   static double getMaxMag(lt_uint32 width, lt_uint32 height);

   static LT_STATUS getDimsAtMag(lt_uint32 width, lt_uint32 height,
                                 double mag,
                                 lt_uint32 &scaledWidth, lt_uint32 &scaledHeight);
   
   static void getVersionInfo(lt_uint32& major,
                              lt_uint32& minor,
                              lt_uint32& revision,
                              lt_uint32& build,
                              const char*& branch);

   static const char* getVersionString();

private:
   // nope
   LTIUtils();
   LTIUtils(const LTIUtils&);
};


LT_END_NAMESPACE(LizardTech)

#endif // LTI_UTILS_H