66 |
|
#endif |
67 |
|
|
68 |
|
extern char *tmErrorMessage[]; /* error messages */ |
69 |
– |
extern int tmLastError; /* last error incurred by library */ |
70 |
– |
extern char *tmLastFunction; /* error-generating function name */ |
69 |
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|
70 |
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typedef short TMbright; /* encoded luminance type */ |
71 |
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|
72 |
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/* basic tone mapping data structure */ |
73 |
< |
extern struct tmStruct { |
73 |
> |
typedef struct tmStruct { |
74 |
|
int flags; /* flags of what to do */ |
75 |
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RGBPRIMP monpri; /* monitor RGB primaries */ |
76 |
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double mongam; /* monitor gamma value (approx.) */ |
83 |
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int *histo; /* input histogram */ |
84 |
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TMbright mbrmin, mbrmax; /* mapped brightness limits */ |
85 |
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unsigned short *lumap; /* computed luminance map */ |
88 |
– |
struct tmStruct *tmprev; /* previous tone mapping */ |
86 |
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MEM_PTR pd[TM_MAXPKG]; /* pointers to private data */ |
87 |
< |
} *tmTop; /* current tone mapping stack */ |
87 |
> |
int lastError; /* last error incurred */ |
88 |
> |
const char *lastFunc; /* error-generating function name */ |
89 |
> |
} TMstruct; |
90 |
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|
91 |
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/* conversion package functions */ |
92 |
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struct tmPackage { |
93 |
< |
MEM_PTR (*Init)(struct tmStruct *tms); |
94 |
< |
void (*NewSpace)(struct tmStruct *tms); |
93 |
> |
MEM_PTR (*Init)(TMstruct *tms); |
94 |
> |
void (*NewSpace)(TMstruct *tms); |
95 |
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void (*Free)(MEM_PTR pp); |
96 |
|
}; |
97 |
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/* our list of conversion packages */ |
118 |
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/**** Library Function Calls ****/ |
119 |
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|
120 |
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|
121 |
< |
extern struct tmStruct * |
121 |
> |
extern TMstruct * |
122 |
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tmInit(int flags, RGBPRIMP monpri, double gamval); |
123 |
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/* |
124 |
< |
Initialize new tone mapping and push it onto stack. |
124 |
> |
Allocate and initialize new tone mapping. |
125 |
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|
126 |
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flags - TM_F_* flags indicating what is to be done. |
127 |
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monpri - display monitor primaries (Note 1). |
128 |
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gamval - display gamma response (can be approximate). |
129 |
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|
130 |
< |
returns - new tmTop, or NULL if insufficient memory. |
130 |
> |
returns - new tone-mapping pointer, or NULL if no memory. |
131 |
|
*/ |
132 |
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|
133 |
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extern int |
134 |
< |
tmSetSpace(RGBPRIMP pri, double sf); |
134 |
> |
tmSetSpace(TMstruct *tms, RGBPRIMP pri, double sf); |
135 |
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/* |
136 |
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Set color primaries and scale factor for incoming scanlines. |
137 |
|
|
138 |
+ |
tms - tone mapping structure pointer. |
139 |
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pri - RGB color input primaries (Note 1). |
140 |
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sf - scale factor to get to luminance in cd/m^2. |
141 |
|
|
143 |
|
*/ |
144 |
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|
145 |
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extern void |
146 |
< |
tmClearHisto(void); |
146 |
> |
tmClearHisto(TMstruct *tms); |
147 |
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/* |
148 |
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Clear histogram for current tone mapping. |
149 |
+ |
|
150 |
+ |
tms - tone mapping structure pointer. |
151 |
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*/ |
152 |
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|
153 |
|
extern int |
154 |
< |
tmAddHisto(TMbright *ls, int len, int wt); |
154 |
> |
tmAddHisto(TMstruct *tms, TMbright *ls, int len, int wt); |
155 |
|
/* |
156 |
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Add brightness values to current histogram. |
157 |
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|
158 |
+ |
tms - tone mapping structure pointer. |
159 |
|
ls - encoded luminance values. |
160 |
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len - number of luminance values. |
161 |
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wt - integer weight to use for each value (usually 1 or -1). |
164 |
|
*/ |
165 |
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|
166 |
|
extern int |
167 |
< |
tmFixedMapping(double expmult, double gamval); |
167 |
> |
tmFixedMapping(TMstruct *tms, double expmult, double gamval); |
168 |
|
/* |
169 |
|
Assign a fixed, linear tone-mapping using the given multiplier, |
170 |
|
which is the ratio of maximum output to uncalibrated input. |
172 |
|
until a new tone mapping is computed. |
173 |
|
Only the min. and max. values are used from the histogram. |
174 |
|
|
175 |
+ |
tms - tone mapping structure pointer. |
176 |
|
expmult - the fixed exposure multiplier to use. |
177 |
|
gamval - display gamma response (0. for default). |
178 |
+ |
|
179 |
|
returns - 0 on success, TM_E_* on error. |
180 |
|
*/ |
181 |
|
|
182 |
|
extern int |
183 |
< |
tmComputeMapping(double gamval, double Lddyn, double Ldmax); |
183 |
> |
tmComputeMapping(TMstruct *tms, double gamval, double Lddyn, double Ldmax); |
184 |
|
/* |
185 |
|
Compute tone mapping function from the current histogram. |
186 |
|
This mapping will be used in subsequent calls to tmMapPixels() |
187 |
|
until a new tone mapping is computed. |
188 |
|
I.e., calls to tmAddHisto() have no immediate effect. |
189 |
|
|
190 |
+ |
tms - tone mapping structure pointer. |
191 |
|
gamval - display gamma response (0. for default). |
192 |
|
Lddyn - the display's dynamic range (0. for default). |
193 |
|
Ldmax - maximum display luminance in cd/m^2 (0. for default). |
196 |
|
*/ |
197 |
|
|
198 |
|
extern int |
199 |
< |
tmMapPixels(BYTE *ps, TMbright *ls, BYTE *cs, int len); |
199 |
> |
tmMapPixels(TMstruct *tms, BYTE *ps, TMbright *ls, BYTE *cs, int len); |
200 |
|
/* |
201 |
|
Apply tone mapping function to pixel values. |
202 |
|
|
203 |
+ |
tms - tone mapping structure pointer. |
204 |
|
ps - returned pixel values (Note 2). |
205 |
|
ls - encoded luminance values. |
206 |
|
cs - encoded chrominance values (Note 2). |
209 |
|
returns - 0 on success, TM_E_* on failure. |
210 |
|
*/ |
211 |
|
|
212 |
< |
extern struct tmStruct * |
213 |
< |
tmPop(void); |
212 |
> |
extern TMstruct * |
213 |
> |
tmDup(TMstruct *orig); |
214 |
|
/* |
215 |
< |
Pops current tone mapping from stack. |
215 |
> |
Duplicate the given tone mapping into a new struct. |
216 |
|
|
217 |
< |
returns - pointer to tone mapping structure, or NULL if none. |
211 |
< |
*/ |
217 |
> |
orig - tone mapping structure to duplicate. |
218 |
|
|
219 |
< |
extern int |
214 |
< |
tmPull(struct tmStruct *tms); |
215 |
< |
/* |
216 |
< |
Pull tone mapping from anywhere in stack. |
217 |
< |
|
218 |
< |
tms - tone mapping structure to find. |
219 |
< |
|
220 |
< |
returns - 1 if found in stack, 0 otherwise. |
219 |
> |
returns - pointer to new struct, or NULL on error. |
220 |
|
*/ |
221 |
|
|
223 |
– |
extern int |
224 |
– |
tmPush(struct tmStruct *tms); |
225 |
– |
/* |
226 |
– |
Make tone mapping active by (pulling it and) pushing it to the top. |
227 |
– |
|
228 |
– |
tms - initialized tone mapping structure. |
229 |
– |
|
230 |
– |
returns - 0 on success, TM_E_* if tms is invalid. |
231 |
– |
*/ |
232 |
– |
|
233 |
– |
extern struct tmStruct * |
234 |
– |
tmDup(void); |
235 |
– |
/* |
236 |
– |
Duplicate the current tone mapping into a new structure on the stack. |
237 |
– |
|
238 |
– |
returns - pointer to new top, or NULL on error. |
239 |
– |
*/ |
240 |
– |
|
222 |
|
extern void |
223 |
< |
tmDone(struct tmStruct *tms); |
223 |
> |
tmDone(TMstruct *tms); |
224 |
|
/* |
225 |
|
Free data associated with the given tone mapping structure. |
245 |
– |
Calls tmPull() first to remove it from the stack if present. |
246 |
– |
The calls tmDone(tmPop()), tmDone(tmTop) and tmDone(NULL) |
247 |
– |
all have the same effect, which is to remove and free |
248 |
– |
the current tone mapping. |
226 |
|
|
227 |
|
tms - tone mapping structure to free. |
228 |
|
*/ |
229 |
|
|
230 |
|
extern int |
231 |
< |
tmCvColors(TMbright *ls, BYTE *cs, COLOR *scan, int len); |
231 |
> |
tmCvColors(TMstruct *tms, TMbright *ls, BYTE *cs, COLOR *scan, int len); |
232 |
|
/* |
233 |
|
Convert RGB/XYZ float scanline to encoded luminance and chrominance. |
234 |
|
|
235 |
+ |
tms - tone mapping structure pointer. |
236 |
|
ls - returned encoded luminance values. |
237 |
|
cs - returned encoded chrominance values (Note 2). |
238 |
|
scan - input scanline. |
242 |
|
*/ |
243 |
|
|
244 |
|
extern int |
245 |
< |
tmCvGrays(TMbright *ls, float *scan, int len); |
245 |
> |
tmCvGrays(TMstruct *tms, TMbright *ls, float *scan, int len); |
246 |
|
/* |
247 |
|
Convert gray float scanline to encoded luminance. |
248 |
|
|
249 |
+ |
tms - tone mapping structure pointer. |
250 |
|
ls - returned encoded luminance values. |
251 |
|
scan - input scanline. |
252 |
|
len - scanline length. |
255 |
|
*/ |
256 |
|
|
257 |
|
extern int |
258 |
< |
tmCvColrs(TMbright *ls, BYTE *cs, COLR *scan, int len); |
258 |
> |
tmCvColrs(TMstruct *tms, TMbright *ls, BYTE *cs, COLR *scan, int len); |
259 |
|
/* |
260 |
|
Convert RGBE/XYZE scanline to encoded luminance and chrominance. |
261 |
|
|
262 |
+ |
tms - tone mapping structure pointer. |
263 |
|
ls - returned encoded luminance values. |
264 |
|
cs - returned encoded chrominance values (Note 2). |
265 |
|
scan - input scanline. |
269 |
|
*/ |
270 |
|
|
271 |
|
extern int |
272 |
< |
tmLoadPicture(TMbright **lpp, BYTE **cpp, int *xp, int *yp, |
272 |
> |
tmLoadPicture(TMstruct *tms, TMbright **lpp, BYTE **cpp, int *xp, int *yp, |
273 |
|
char *fname, FILE *fp); |
274 |
|
/* |
275 |
|
Load Radiance picture and convert to tone mapping representation. |
277 |
|
malloc(3), and should be freed with free(3) when no longer needed. |
278 |
|
Calls tmSetSpace() to calibrate input color space. |
279 |
|
|
280 |
+ |
tms - tone mapping structure pointer. |
281 |
|
lpp - returned array of encoded luminances, picture ordering. |
282 |
|
cpp - returned array of encoded chrominances (Note 2). |
283 |
|
xp, yp - returned picture dimensions. |
293 |
|
char *fname, FILE *fp); |
294 |
|
/* |
295 |
|
Load and apply tone mapping to Radiance picture. |
315 |
– |
Stack is restored to its original state upon return. |
296 |
|
If fp is TM_GETFILE and (flags&TM_F_UNIMPL)!=0, tmMapPicture() |
297 |
|
calls pcond to perform the actual conversion, which takes |
298 |
|
longer but gives access to all the TM_F_* features. |
313 |
|
*/ |
314 |
|
|
315 |
|
extern int |
316 |
< |
tmCvRGB48(TMbright *ls, BYTE *cs, uint16 (*scan)[3], int len, double gv); |
316 |
> |
tmCvRGB48(TMstruct *tms, TMbright *ls, BYTE *cs, uint16 (*scan)[3], |
317 |
> |
int len, double gv); |
318 |
|
/* |
319 |
|
Convert 48-bit RGB scanline to encoded luminance and chrominance. |
320 |
|
|
321 |
+ |
tms - tone mapping structure pointer. |
322 |
|
ls - returned encoded luminance values. |
323 |
|
cs - returned encoded chrominance values (Note 2). |
324 |
|
scan - input scanline. |
329 |
|
*/ |
330 |
|
|
331 |
|
extern int |
332 |
< |
tmCvGray16(TMbright *ls, uint16 *scan, int len, double gv); |
332 |
> |
tmCvGray16(TMstruct *tms, TMbright *ls, uint16 *scan, int len, double gv); |
333 |
|
/* |
334 |
|
Convert 16-bit gray scanline to encoded luminance. |
335 |
|
|
336 |
+ |
tms - tone mapping structure pointer. |
337 |
|
ls - returned encoded luminance values. |
338 |
|
scan - input scanline. |
339 |
|
len - scanline length. |