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#ifndef _RAD_TONEMAP_H_ |
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#define _RAD_TONEMAP_H_ |
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#include "tifftypes.h" |
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#include "tiff.h" /* needed for int32, etc. */ |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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/**** Argument Macros ****/ |
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/* Flags of what to do */ |
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/* flags of what to do */ |
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#define TM_F_HCONTR 01 /* human contrast sensitivity */ |
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#define TM_F_MESOPIC 02 /* mesopic color sensitivity */ |
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#define TM_F_LINEAR 04 /* linear brightness mapping */ |
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#endif |
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extern char *tmErrorMessage[]; /* error messages */ |
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extern int tmLastError; /* last error incurred by library */ |
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extern char *tmLastFunction; /* error-generating function name */ |
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typedef short TMbright; /* encoded luminance type */ |
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/* basic tone mapping data structure */ |
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typedef struct tmStruct { |
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typedef struct { |
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int flags; /* flags of what to do */ |
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RGBPRIMP monpri; /* monitor RGB primaries */ |
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double mongam; /* monitor gamma value (approx.) */ |
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int cdiv[3]; /* computed color divisors */ |
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RGBPRIMP inppri; /* current input primaries */ |
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double inpsf; /* current input scalefactor */ |
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MEM_PTR inpdat; /* current input client data */ |
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COLORMAT cmat; /* color conversion matrix */ |
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TMbright hbrmin, hbrmax; /* histogram brightness limits */ |
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int *histo; /* input histogram */ |
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TMbright mbrmin, mbrmax; /* mapped brightness limits */ |
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unsigned short *lumap; /* computed luminance map */ |
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MEM_PTR pd[TM_MAXPKG]; /* pointers to private data */ |
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int lastError; /* last error incurred */ |
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const char *lastFunc; /* error-generating function name */ |
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} TMstruct; |
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/* conversion package functions */ |
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/**** Library Function Calls ****/ |
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extern TMbright |
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tmCvLuminance(double lum); |
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/* |
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Convert a single luminance value to an encoded brightness value. |
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*/ |
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extern int |
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tmCvLums(TMbright *ls, float *scan, int len); |
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/* |
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Convert luminance values to encoded brightness values using lookup. |
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ls - returned encoded luminance values. |
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scan - input scanline. |
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len - scanline length. |
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returns - 0 on success, TM_E_* on error. |
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*/ |
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extern TMstruct * |
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tmInit(int flags, RGBPRIMP monpri, double gamval); |
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/* |
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*/ |
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extern int |
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tmSetSpace(TMstruct *tms, RGBPRIMP pri, double sf); |
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tmSetSpace(TMstruct *tms, RGBPRIMP pri, double sf, MEM_PTR dat); |
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/* |
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Set color primaries and scale factor for incoming scanlines. |
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tms - tone mapping structure pointer. |
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pri - RGB color input primaries (Note 1). |
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sf - scale factor to get to luminance in cd/m^2. |
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dat - application-specific data (NULL if not needed) |
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returns - 0 on success, TM_E_* code on failure. |
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*/ |
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tms - tone mapping structure pointer. |
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expmult - the fixed exposure multiplier to use. |
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gamval - display gamma response (0. for default). |
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returns - 0 on success, TM_E_* on error. |
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*/ |
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Duplicate the given tone mapping into a new struct. |
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orig - tone mapping structure to duplicate. |
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returns - pointer to new struct, or NULL on error. |
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*/ |
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*/ |
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extern int |
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tmCvColors(TMstruct *tms, TMbright *ls, BYTE *cs, COLOR *scan, int len); |
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tmCvGrays(TMstruct *tms, TMbright *ls, float *scan, int len); |
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/* |
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Convert RGB/XYZ float scanline to encoded luminance and chrominance. |
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Convert gray float scanline to encoded luminance. |
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tms - tone mapping structure pointer. |
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ls - returned encoded luminance values. |
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cs - returned encoded chrominance values (Note 2). |
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scan - input scanline. |
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len - scanline length. |
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*/ |
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extern int |
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tmCvGrays(TMstruct *tms, TMbright *ls, float *scan, int len); |
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tmCvColors(TMstruct *tms, TMbright *ls, BYTE *cs, COLOR *scan, int len); |
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/* |
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Convert gray float scanline to encoded luminance. |
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Convert RGB/XYZ float scanline to encoded luminance and chrominance. |
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tms - tone mapping structure pointer. |
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ls - returned encoded luminance values. |
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cs - returned encoded chrominance values (Note 2). |
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scan - input scanline. |
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len - scanline length. |
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