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/* required non-system header files */ |
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#include "color.h" |
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|
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|
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/**** Argument Macros ****/ |
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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_CWEIGHT 040 /* center weighting */ |
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#define TM_F_FOVEAL 0100 /* use foveal sample size */ |
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#define TM_F_BW 0200 /* luminance only */ |
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#define TM_F_NOERRS 0400 /* don't report errors to stderr */ |
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#define TM_F_NOSTDERR 0400 /* don't report errors to stderr */ |
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/* combined modes */ |
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#define TM_F_CAMERA 0 |
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#define TM_F_HUMAN (TM_F_HCONTR|TM_F_MESOPIC|TM_F_VEIL|\ |
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#define TM_E_TMINVAL 3 /* no valid tone mapping */ |
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#define TM_E_TMFAIL 4 /* cannot compute tone mapping */ |
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#define TM_E_BADFILE 5 /* cannot open or understand file */ |
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#define TM_E_CODERR1 6 /* code consistency error 1 */ |
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#define TM_E_CODERR2 7 /* code consistency error 2 */ |
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|
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|
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/**** Conversion Constants and Table Sizes ****/ |
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|
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#define TM_BRTSCALE 128 /* brightness scale factor (integer) */ |
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|
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< |
#define TM_GAMTSZ 1024 /* gamma lookup table size */ |
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#define TM_MAXPKG 8 /* maximum number of color formats */ |
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|
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/**** Global Data Structures ****/ |
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|
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/**** Global Data Types and Structures ****/ |
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|
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#ifndef MEM_PTR |
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#define MEM_PTR void * |
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#endif |
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|
| 60 |
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extern char *tmErrorMessage[]; /* error messages */ |
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|
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typedef short TMbright; /* encoded luminance type */ |
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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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BYTE gamb[TM_GAMTSZ];/* gamma lookup table from mongam */ |
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COLOR clf; /* computed luminance coefficients */ |
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COLR clfb; /* normalized version of clf */ |
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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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TMbright inpsfb; /* encoded version of inpsf */ |
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COLORMAT cmat; /* color conversion matrix */ |
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TMbright brmin, brmax; /* input brightness limits */ |
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int *histo; /* input histogram */ |
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unsigned short *lumap; /* computed luminance map */ |
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struct tmStruct *tmprev; /* previous tone mapping */ |
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+ |
MEM_PTR pd[TM_MAXPKG]; /* pointers to private data */ |
| 79 |
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} *tmTop; /* current tone mapping stack */ |
| 80 |
< |
|
| 80 |
> |
|
| 81 |
> |
/* conversion package functions */ |
| 82 |
> |
#ifdef NOPROTO |
| 83 |
> |
struct tmPackage { |
| 84 |
> |
MEM_PTR (*Init)(); /* initialize private data */ |
| 85 |
> |
void (*NewSpace)(); /* new input color space (optional) */ |
| 86 |
> |
void (*Free)(); /* free private data */ |
| 87 |
> |
}; |
| 88 |
> |
#else |
| 89 |
> |
struct tmPackage { |
| 90 |
> |
MEM_PTR (*Init)(struct tmStruct *tms); |
| 91 |
> |
int (*NewSpace)(struct tmStruct *tms); |
| 92 |
> |
void (*Free)(MEM_PTR pp); |
| 93 |
> |
}; |
| 94 |
> |
#endif |
| 95 |
> |
/* our list of conversion packages */ |
| 96 |
> |
extern struct tmPackage *tmPkg[TM_MAXPKG]; |
| 97 |
> |
extern int tmNumPkgs; /* number of registered packages */ |
| 98 |
> |
|
| 99 |
> |
|
| 100 |
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/**** Useful Macros ****/ |
| 101 |
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|
| 102 |
+ |
/* compute luminance from encoded value */ |
| 103 |
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#define tmLuminance(li) exp((li)/(double)TM_BRTSCALE) |
| 104 |
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|
| 105 |
+ |
/* does tone mapping need color matrix? */ |
| 106 |
+ |
#define tmNeedMatrix(t) ((t)->monpri != (t)->inppri) |
| 107 |
+ |
|
| 108 |
+ |
/* register a conversion package */ |
| 109 |
+ |
#define tmRegPkg(pf) ( tmNumPkgs >= TM_MAXPKG ? -1 : \ |
| 110 |
+ |
(tmPkg[tmNumPkgs] = (pf), tmNumPkgs++) ) |
| 111 |
+ |
|
| 112 |
+ |
/* get the specific package's data */ |
| 113 |
+ |
#define tmPkgData(t,i) ((t)->pd[i]!=NULL ? (t)->pd[i] : (*tmPkg[i]->Init)(t)) |
| 114 |
+ |
|
| 115 |
+ |
|
| 116 |
|
/**** Library Function Calls ****/ |
| 117 |
|
|
| 118 |
< |
#ifdef NOPROTO |
| 118 |
> |
#ifdef NOPROTO |
| 119 |
|
|
| 120 |
< |
extern struct tmStruct *tmInit(), *tmPop(); |
| 120 |
> |
extern struct tmStruct *tmInit(), *tmPop(), *tmDup(); |
| 121 |
|
extern void tmClearHisto(), tmDone(); |
| 122 |
|
extern int tmSetSpace(), tmCvColors(), tmCvColrs(); |
| 123 |
|
extern int tmAddHisto(), tmComputeMapping(), tmMapPixels(); |
| 222 |
|
char *fname, FILE *fp); |
| 223 |
|
/* |
| 224 |
|
Load Radiance picture and convert to tone mapping representation. |
| 225 |
+ |
Memory for the luminance and chroma arrays is allocated using |
| 226 |
+ |
malloc(3), and should be freed with free(3) when no longer needed. |
| 227 |
+ |
Calls tmSetSpace() to calibrate input color space. |
| 228 |
|
|
| 229 |
|
lpp - returned array of encoded luminances, English ordering. |
| 230 |
|
cpp - returned array of encoded chrominances (Note 2). |
| 245 |
|
If fp is TM_GETFILE and (flags&TM_F_UNIMPL)!=0, tmMapPicture() |
| 246 |
|
calls pcond to perform the actual conversion, which takes |
| 247 |
|
longer but gives access to all the TM_F_* features. |
| 248 |
+ |
Memory for the final pixel array is allocated using malloc(3), |
| 249 |
+ |
and should be freed with free(3) when it is no longer needed. |
| 250 |
|
|
| 251 |
|
psp - returned array of tone mapped pixels, English ordering. |
| 252 |
|
xp, yp - returned picture dimensions. |
| 289 |
|
returns - 0 on success, TM_E_* if tms is invalid. |
| 290 |
|
*/ |
| 291 |
|
|
| 292 |
+ |
extern struct tmStruct * |
| 293 |
+ |
tmDup(void); |
| 294 |
+ |
/* |
| 295 |
+ |
Duplicate the current tone mapping into a new structure on the stack. |
| 296 |
+ |
|
| 297 |
+ |
returns - pointer to new top, or NULL on error. |
| 298 |
+ |
*/ |
| 299 |
+ |
|
| 300 |
|
extern void |
| 301 |
|
tmDone(struct tmStruct *tms); |
| 302 |
|
/* |
| 310 |
|
*/ |
| 311 |
|
|
| 312 |
|
#endif |
| 313 |
< |
|
| 313 |
> |
|
| 314 |
> |
|
| 315 |
|
/**** Notes ****/ |
| 316 |
|
/* |
| 317 |
|
General: |
| 320 |
|
pixel values to chroma and luminance encodings, which can |
| 321 |
|
be passed to tmAddHisto() to put into the tone mapping histogram. |
| 322 |
|
This histogram is then used along with the display parameters |
| 323 |
< |
by tmComputMapping() to compute the luminance mapping function. |
| 323 |
> |
by tmComputeMapping() to compute the luminance mapping function. |
| 324 |
|
(Colors are tone-mapped as they are converted if TM_F_MESOPIC |
| 325 |
|
is set.) The encoded chroma and luminance values may then be |
| 326 |
|
passed to tmMapPixels() to apply the computed tone mapping in |
| 333 |
|
used during final mapping, setting the cs parameter to TM_NOCHROM |
| 334 |
|
on the first pass will save time.) Another memory saving option |
| 335 |
|
if third and subsequent passes are not needed is to use the |
| 336 |
< |
same array to store the mapped pixels as is used to store |
| 336 |
> |
same array to store the mapped pixels as used to store |
| 337 |
|
the encoded chroma values. This way, only two extra bytes |
| 338 |
|
for storing encoded luminances are required per pixel. This |
| 339 |
|
is the method employed by tmMapPicture(), for example. |
