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00013 #ifndef LTI_UTILS_H
00014 #define LTI_UTILS_H
00015
00016
00017
00018 #include "lti_types.h"
00019
00020 LT_BEGIN_NAMESPACE(LizardTech)
00021 #define LTI_DEFAULT_MAG_SNAP_THRESHOLD 0.41503749927884381
00022
00031 class LTIUtils
00032 {
00033 public:
00044 static lt_uint8 getMinNumSamplesPerPixel(LTIColorSpace colorspace);
00045
00046 #if 1 //JAH deprecate
00047
00053 static LTIColorSpace getColorSpaceWithoutAlpha(LTIColorSpace colorspace);
00054
00061 static bool hasAlphaBand(LTIColorSpace colorspace);
00062 #endif
00063
00072 static lt_uint8 getNumBytes(LTIDataType datatype);
00073
00083 static bool isSigned(LTIDataType datatype);
00084
00094 static bool isIntegral(LTIDataType datatype);
00095
00096 static double getMinValue(LTIDataType datatype);
00097 static double getMaxValue(LTIDataType datatype);
00098
00099 static bool needsSwapping(LTIDataType datatype, LTIEndian byteOrder);
00100
00105
00117 static void convertWindowLevelToMinMax(double window, double level,
00118 double& drmin, double& drmax);
00119
00134 static void convertMinMaxToWindowLevel(double drmin, double drmax,
00135 double& window, double& level);
00142
00156 static lt_int32 magToLevel(double mag);
00157
00168 static double levelToMag(lt_int32 level);
00169
00178 static double snapToOctave(double mag, double threshold = LTI_DEFAULT_MAG_SNAP_THRESHOLD);
00179
00190 static double snapToOctave(double mag, const LTIImageStage &imageStage, double threshold = LTI_DEFAULT_MAG_SNAP_THRESHOLD);
00191
00192 static bool isOctave(double mag);
00193
00194
00203 static lt_uint8 getNumLevelsForIcon(lt_uint32 width,
00204 lt_uint32 height,
00205 lt_uint32 iconsize);
00206
00207 #if 0
00208
00216 static double getMagForIcon(lt_uint32 width,
00217 lt_uint32 height,
00218 lt_uint32 iconsize);
00219
00220 static double getMaxMag(lt_uint32 width, lt_uint32 height);
00221 #endif
00222
00236 static LT_STATUS getDimsAtMag(lt_uint32 width, lt_uint32 height,
00237 double mag,
00238 lt_uint32 &scaledWidth, lt_uint32 &scaledHeight);
00239
00258 static void getVersionInfo(lt_uint32& major,
00259 lt_uint32& minor,
00260 lt_uint32& revision,
00261 lt_uint32& build,
00262 const char*& branch);
00263
00273 static const char* getVersionString();
00274
00275 private:
00276
00277 LTIUtils();
00278 LTIUtils(const LTIUtils&);
00279 };
00280
00281
00282 LT_END_NAMESPACE(LizardTech)
00283
00284 #endif // LTI_UTILS_H