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root/radiance/ray/src/common/tonemap.h
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Comparing ray/src/common/tonemap.h (file contents):
Revision 3.4 by greg, Fri Apr 18 13:59:48 1997 UTC vs.
Revision 3.9 by gwlarson, Mon Oct 5 16:49:52 1998 UTC

# Line 1 | Line 1
1 < /* Copyright (c) 1997 Regents of the University of California */
1 > /* Copyright (c) 1998 Silicon Graphics, Inc. */
2  
3 < /* SCCSid "$SunId$ LBL" */
3 > /* SCCSid "$SunId$ SGI" */
4  
5   /*
6   * Header file for tone mapping functions.
7 + *
8 + * Include after "color.h"
9   */
8 –                                /* required non-system header files */
9 – #include        "color.h"
10  
11  
12   /****    Argument Macros    ****/
# Line 32 | Line 32
32   #define TM_NOCHROMP     (BYTE **)NULL   /* indicate no chrominances */
33   #define TM_GETFILE      (FILE *)NULL    /* indicate file must be opened */
34  
35 +
36   /****    Error Return Values    ****/
37  
38   #define TM_E_OK         0               /* normal return status */
# Line 58 | Line 59
59   #endif
60  
61   extern char     *tmErrorMessage[];      /* error messages */
62 + extern int      tmLastError;            /* last error incurred by library */
63 + extern char     *tmLastFunction;        /* error-generating function name */
64  
65   typedef short   TMbright;               /* encoded luminance type */
66  
# Line 71 | Line 74 | extern struct tmStruct {
74          RGBPRIMP        inppri;         /* current input primaries */
75          double          inpsf;          /* current input scalefactor */
76          COLORMAT        cmat;           /* color conversion matrix */
77 <        TMbright        brmin, brmax;   /* input brightness limits */  
77 >        TMbright        hbrmin, hbrmax; /* histogram brightness limits */      
78          int             *histo;         /* input histogram */
79 +        TMbright        mbrmin, mbrmax; /* mapped brightness limits */
80          unsigned short  *lumap;         /* computed luminance map */
81          struct tmStruct *tmprev;        /* previous tone mapping */
82          MEM_PTR         pd[TM_MAXPKG];  /* pointers to private data */
# Line 195 | Line 199 | tmAddHisto(TMbright *ls, int len, int wt);
199   extern int
200   tmComputeMapping(double gamval, double Lddyn, double Ldmax);
201   /*
202 <        Compute tone mapping function.
202 >        Compute tone mapping function.  This mapping will be used
203 >        in subsequent calls to tmMapPixels() until a new tone mapping
204 >        is computed.  I.e., calls to tmAddHisto() have no immediate effect.
205  
206          gamval  -       display gamma response (0. for default).
207          Lddyn   -       the display's dynamic range (0. for default).
# Line 222 | Line 228 | tmLoadPicture(TMbright **lpp, BYTE **cpp, int *xp, int
228                  char *fname, FILE *fp);
229   /*
230          Load Radiance picture and convert to tone mapping representation.
231 +        Memory for the luminance and chroma arrays is allocated using
232 +        malloc(3), and should be freed with free(3) when no longer needed.
233          Calls tmSetSpace() to calibrate input color space.
234  
235 <        lpp     -       returned array of encoded luminances, English ordering.
235 >        lpp     -       returned array of encoded luminances, picture ordering.
236          cpp     -       returned array of encoded chrominances (Note 2).
237          xp, yp  -       returned picture dimensions.
238          fname   -       picture file name.
# Line 243 | Line 251 | tmMapPicture(BYTE **psp, int *xp, int *yp, int flags,
251          If fp is TM_GETFILE and (flags&TM_F_UNIMPL)!=0, tmMapPicture()
252          calls pcond to perform the actual conversion, which takes
253          longer but gives access to all the TM_F_* features.
254 +        Memory for the final pixel array is allocated using malloc(3),
255 +        and should be freed with free(3) when it is no longer needed.
256  
257 <        psp     -       returned array of tone mapped pixels, English ordering.
257 >        psp     -       returned array of tone mapped pixels, picture ordering.
258          xp, yp  -       returned picture dimensions.
259          flags   -       TM_F_* flags indicating what is to be done.
260          monpri  -       display monitor primaries (Note 1).
# Line 316 | Line 326 | tmDone(struct tmStruct *tms);
326          pixel values to chroma and luminance encodings, which can
327          be passed to tmAddHisto() to put into the tone mapping histogram.
328          This histogram is then used along with the display parameters
329 <        by tmComputMapping() to compute the luminance mapping function.
329 >        by tmComputeMapping() to compute the luminance mapping function.
330          (Colors are tone-mapped as they are converted if TM_F_MESOPIC
331          is set.)  The encoded chroma and luminance values may then be
332          passed to tmMapPixels() to apply the computed tone mapping in

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