19 |
|
|
20 |
|
#define rdirscan(y) (raydir+(y)*fvxr) |
21 |
|
|
22 |
+ |
static void compraydir(void); |
23 |
+ |
#if ADJ_VEIL |
24 |
+ |
static void smoothveil(void); |
25 |
+ |
#endif |
26 |
|
|
27 |
< |
compraydir() /* compute ray directions */ |
27 |
> |
|
28 |
> |
static void |
29 |
> |
compraydir(void) /* compute ray directions */ |
30 |
|
{ |
31 |
|
FVECT rorg, rdir; |
32 |
|
double h, v; |
75 |
|
} |
76 |
|
|
77 |
|
|
78 |
< |
compveil() /* compute veiling image */ |
78 |
> |
extern void |
79 |
> |
compveil(void) /* compute veiling image */ |
80 |
|
{ |
81 |
|
double t2, t2sum; |
82 |
|
COLOR ctmp, vsum; |
137 |
|
* and added to the foveal image, and the mapping has been |
138 |
|
* determined. |
139 |
|
*/ |
140 |
< |
adjveil() /* adjust veil image */ |
140 |
> |
extern void |
141 |
> |
adjveil(void) /* adjust veil image */ |
142 |
|
{ |
143 |
|
float *crfptr = crfimg; |
144 |
|
COLOR *fovptr = fovimg; |
184 |
|
} |
185 |
|
|
186 |
|
|
187 |
< |
smoothveil() /* smooth veil image */ |
187 |
> |
static void |
188 |
> |
smoothveil(void) /* smooth veil image */ |
189 |
|
{ |
190 |
|
COLOR *nveilimg; |
191 |
|
COLOR *ovptr, *nvptr; |
254 |
|
} |
255 |
|
#endif |
256 |
|
|
257 |
< |
addveil(sl, y) /* add veil to scanline */ |
258 |
< |
COLOR *sl; |
259 |
< |
int y; |
257 |
> |
extern void |
258 |
> |
addveil( /* add veil to scanline */ |
259 |
> |
COLOR *sl, |
260 |
> |
int y |
261 |
> |
) |
262 |
|
{ |
263 |
|
int vx, vy; |
264 |
|
double dx, dy; |
302 |
|
|
303 |
|
#define tsampr(x,y) inpacuD[(y)*fvxr+(x)] |
304 |
|
|
305 |
+ |
static COLOR * getascan(SCANBAR *sb, int y); |
306 |
+ |
static void acusample(COLOR col, int x, int y, double sr); |
307 |
+ |
static void ascanval(COLOR col, int x, int y, SCANBAR *sb); |
308 |
+ |
static SCANBAR *sballoc(int se, int ns, int sl); |
309 |
|
|
310 |
< |
double |
311 |
< |
hacuity(La) /* return visual acuity in cycles/degree */ |
312 |
< |
double La; |
310 |
> |
extern double |
311 |
> |
hacuity( /* return visual acuity in cycles/degree */ |
312 |
> |
double La |
313 |
> |
) |
314 |
|
{ |
315 |
|
/* functional fit */ |
316 |
|
return(17.25*atan(1.4*log10(La) + 0.35) + 25.72); |
317 |
|
} |
318 |
|
|
319 |
|
|
320 |
< |
COLOR * |
321 |
< |
getascan(sb, y) /* find/read scanline y for scanbar sb */ |
322 |
< |
register SCANBAR *sb; |
323 |
< |
int y; |
320 |
> |
static COLOR * |
321 |
> |
getascan( /* find/read scanline y for scanbar sb */ |
322 |
> |
register SCANBAR *sb, |
323 |
> |
int y |
324 |
> |
) |
325 |
|
{ |
326 |
|
register COLOR *sl0, *sl1, *mysl; |
327 |
|
register int i; |
354 |
|
} |
355 |
|
|
356 |
|
|
357 |
< |
acuscan(scln, y) /* get acuity-sampled scanline */ |
358 |
< |
COLOR *scln; |
359 |
< |
int y; |
357 |
> |
extern void |
358 |
> |
acuscan( /* get acuity-sampled scanline */ |
359 |
> |
COLOR *scln, |
360 |
> |
int y |
361 |
> |
) |
362 |
|
{ |
363 |
|
double sr; |
364 |
|
double dx, dy; |
382 |
|
} |
383 |
|
|
384 |
|
|
385 |
< |
acusample(col, x, y, sr) /* interpolate sample at (x,y) using rate sr */ |
386 |
< |
COLOR col; |
387 |
< |
int x, y; |
388 |
< |
double sr; |
385 |
> |
static void |
386 |
> |
acusample( /* interpolate sample at (x,y) using rate sr */ |
387 |
> |
COLOR col, |
388 |
> |
int x, |
389 |
> |
int y, |
390 |
> |
double sr |
391 |
> |
) |
392 |
|
{ |
393 |
|
COLOR c1; |
394 |
|
double d; |
407 |
|
} |
408 |
|
|
409 |
|
|
410 |
< |
ascanval(col, x, y, sb) /* interpolate scanbar at orig. coords (x,y) */ |
411 |
< |
COLOR col; |
412 |
< |
int x, y; |
413 |
< |
SCANBAR *sb; |
410 |
> |
static void |
411 |
> |
ascanval( /* interpolate scanbar at orig. coords (x,y) */ |
412 |
> |
COLOR col, |
413 |
> |
int x, |
414 |
> |
int y, |
415 |
> |
SCANBAR *sb |
416 |
> |
) |
417 |
|
{ |
418 |
|
COLOR *sl0, *sl1, c1, c1y; |
419 |
|
double dx, dy; |
458 |
|
} |
459 |
|
|
460 |
|
|
461 |
< |
SCANBAR * |
462 |
< |
sballoc(se, ns, sl) /* allocate scanbar */ |
463 |
< |
int se; /* sampling rate exponent */ |
464 |
< |
int ns; /* number of scanlines */ |
465 |
< |
int sl; /* original scanline length */ |
461 |
> |
static SCANBAR * |
462 |
> |
sballoc( /* allocate scanbar */ |
463 |
> |
int se, /* sampling rate exponent */ |
464 |
> |
int ns, /* number of scanlines */ |
465 |
> |
int sl /* original scanline length */ |
466 |
> |
) |
467 |
|
{ |
468 |
|
SCANBAR *sbarr; |
469 |
|
register SCANBAR *sb; |
488 |
|
} |
489 |
|
|
490 |
|
|
491 |
< |
initacuity() /* initialize variable acuity sampling */ |
491 |
> |
extern void |
492 |
> |
initacuity(void) /* initialize variable acuity sampling */ |
493 |
|
{ |
494 |
|
FVECT diffx, diffy, cp; |
495 |
|
double omega, maxsr; |