| 126 |
|
register int x, i; |
| 127 |
|
|
| 128 |
|
vy = dy = (y+.5)/numscans(&inpres)*fvyr - .5; |
| 129 |
< |
if (vy >= fvyr-1) vy--; |
| 129 |
> |
while (vy >= fvyr-1) vy--; |
| 130 |
|
dy -= (double)vy; |
| 131 |
|
for (x = 0; x < scanlen(&inpres); x++) { |
| 132 |
|
vx = dx = (x+.5)/scanlen(&inpres)*fvxr - .5; |
| 133 |
< |
if (vx >= fvxr-1) vx--; |
| 133 |
> |
while (vx >= fvxr-1) vx--; |
| 134 |
|
dx -= (double)vx; |
| 135 |
|
for (i = 0; i < 3; i++) { |
| 136 |
|
lv = (1.-dy)*colval(veilscan(vy)[vx],i) + |
| 146 |
|
|
| 147 |
|
/****************** ACUITY STUFF *******************/ |
| 148 |
|
|
| 149 |
< |
typedef struct scanbar { |
| 150 |
< |
short sampr; /* sample area size (power of 2) */ |
| 149 |
> |
typedef struct { |
| 150 |
> |
short sampe; /* sample area size (exponent of 2) */ |
| 151 |
|
short nscans; /* number of scanlines in this bar */ |
| 152 |
|
int len; /* individual scanline length */ |
| 153 |
– |
struct scanbar *next; /* next higher resolution scanbar */ |
| 153 |
|
int nread; /* number of scanlines loaded */ |
| 154 |
< |
/* followed by the scanline data */ |
| 154 |
> |
COLOR *sdata; /* scanbar data */ |
| 155 |
|
} SCANBAR; |
| 156 |
|
|
| 157 |
< |
#define bscan(sb,y) ((COLOR *)((sb)+1)+((y)%(sb)->nscans)*(sb)->len) |
| 157 |
> |
#define bscan(sb,y) ((COLOR *)(sb)->sdata+((y)%(sb)->nscans)*(sb)->len) |
| 158 |
|
|
| 159 |
|
SCANBAR *rootbar; /* root scan bar (lowest resolution) */ |
| 160 |
|
|
| 179 |
|
}; |
| 180 |
|
double l10La; |
| 181 |
|
register int i; |
| 182 |
< |
/* interpolate/extrapolate data */ |
| 182 |
> |
/* check limits */ |
| 183 |
> |
if (La <= 7.85e-4) |
| 184 |
> |
return(resfreq[0]); |
| 185 |
> |
if (La >= 1.78e3) |
| 186 |
> |
return(resfreq[NPOINTS-1]); |
| 187 |
> |
/* interpolate data */ |
| 188 |
|
l10La = log10(La); |
| 189 |
|
for (i = 0; i < NPOINTS-2 && l10lum[i+1] <= l10La; i++) |
| 190 |
|
; |
| 203 |
|
register COLOR *sl0, *sl1, *mysl; |
| 204 |
|
register int i; |
| 205 |
|
|
| 206 |
< |
if (y < sb->nread - sb->nscans) { |
| 207 |
< |
fprintf(stderr, "%s: internal - cannot backspace in getascan\n", |
| 204 |
< |
progname); |
| 205 |
< |
exit(1); |
| 206 |
< |
} |
| 206 |
> |
if (y < sb->nread - sb->nscans) /* too far back? */ |
| 207 |
> |
return(NULL); |
| 208 |
|
for ( ; y >= sb->nread; sb->nread++) { /* read as necessary */ |
| 209 |
|
mysl = bscan(sb, sb->nread); |
| 210 |
< |
if (sb->sampr == 1) { |
| 210 |
> |
if (sb->sampe == 0) { |
| 211 |
|
if (freadscan(mysl, sb->len, infp) < 0) { |
| 212 |
|
fprintf(stderr, "%s: %s: scanline read error\n", |
| 213 |
|
progname, infn); |
| 214 |
|
exit(1); |
| 215 |
|
} |
| 216 |
|
} else { |
| 217 |
< |
sl0 = getascan(sb->next, 2*y); |
| 218 |
< |
sl1 = getascan(sb->next, 2*y+1); |
| 217 |
> |
sl0 = getascan(sb+1, 2*y); |
| 218 |
> |
if (sl0 == NULL) |
| 219 |
> |
return(NULL); |
| 220 |
> |
sl1 = getascan(sb+1, 2*y+1); |
| 221 |
|
for (i = 0; i < sb->len; i++) { |
| 222 |
|
copycolor(mysl[i], sl0[2*i]); |
| 223 |
|
addcolor(mysl[i], sl0[2*i+1]); |
| 266 |
|
double d; |
| 267 |
|
register SCANBAR *sb0; |
| 268 |
|
|
| 269 |
< |
for (sb0 = rootbar; sb0->next != NULL && sb0->next->sampr > sr; |
| 267 |
< |
sb0 = sb0->next) |
| 269 |
> |
for (sb0 = rootbar; sb0->sampe != 0 && 1<<sb0[1].sampe > sr; sb0++) |
| 270 |
|
; |
| 271 |
|
ascanval(col, x, y, sb0); |
| 272 |
< |
if (sb0->next == NULL) /* don't extrapolate highest */ |
| 272 |
> |
if (sb0->sampe == 0) /* don't extrapolate highest */ |
| 273 |
|
return; |
| 274 |
< |
ascanval(c1, x, y, sb0->next); |
| 275 |
< |
d = (sb0->sampr - sr)/(sb0->sampr - sb0->next->sampr); |
| 274 |
> |
ascanval(c1, x, y, sb0+1); |
| 275 |
> |
d = ((1<<sb0->sampe) - sr)/(1<<sb0[1].sampe); |
| 276 |
|
scalecolor(col, 1.-d); |
| 277 |
|
scalecolor(c1, d); |
| 278 |
|
addcolor(col, c1); |
| 288 |
|
double dx, dy; |
| 289 |
|
int ix, iy; |
| 290 |
|
|
| 291 |
< |
ix = dx = (x+.5)/sb->sampr - .5; |
| 292 |
< |
if (ix >= sb->len-1) ix--; |
| 291 |
> |
if (sb->sampe == 0) { /* no need to interpolate */ |
| 292 |
> |
sl0 = getascan(sb, y); |
| 293 |
> |
copycolor(col, sl0[x]); |
| 294 |
> |
return; |
| 295 |
> |
} |
| 296 |
> |
/* compute coordinates for sb */ |
| 297 |
> |
ix = dx = (x+.5)/(1<<sb->sampe) - .5; |
| 298 |
> |
while (ix >= sb->len-1) ix--; |
| 299 |
|
dx -= (double)ix; |
| 300 |
< |
iy = dy = (y+.5)/sb->sampr - .5; |
| 301 |
< |
if (iy >= numscans(&inpres)/sb->sampr-1) iy--; |
| 300 |
> |
iy = dy = (y+.5)/(1<<sb->sampe) - .5; |
| 301 |
> |
while (iy >= (numscans(&inpres)>>sb->sampe)-1) iy--; |
| 302 |
|
dy -= (double)iy; |
| 303 |
|
/* get scanlines */ |
| 304 |
|
sl0 = getascan(sb, iy); |
| 305 |
+ |
if (sl0 == NULL) { |
| 306 |
+ |
fprintf(stderr, "%s: internal - cannot backspace in ascanval\n", |
| 307 |
+ |
progname); |
| 308 |
+ |
exit(1); |
| 309 |
+ |
} |
| 310 |
|
sl1 = getascan(sb, iy+1); |
| 311 |
|
/* 2D linear interpolation */ |
| 312 |
|
copycolor(col, sl0[ix]); |
| 331 |
|
int ns; /* number of scanlines */ |
| 332 |
|
int sl; /* original scanline length */ |
| 333 |
|
{ |
| 334 |
+ |
SCANBAR *sbarr; |
| 335 |
|
register SCANBAR *sb; |
| 336 |
|
|
| 337 |
< |
sb = (SCANBAR *)malloc(sizeof(SCANBAR)+(sl/sr)*ns*sizeof(COLOR)); |
| 337 |
> |
sbarr = sb = (SCANBAR *)malloc((sr+1)*sizeof(SCANBAR)); |
| 338 |
|
if (sb == NULL) |
| 339 |
|
syserror("malloc"); |
| 340 |
< |
sb->nscans = ns; |
| 341 |
< |
sb->len = sl/sr; |
| 342 |
< |
sb->nread = 0; |
| 343 |
< |
if ((sb->sampr = sr) > 1) |
| 344 |
< |
sb->next = sballoc(sr/2, ns*2, sl); |
| 345 |
< |
else |
| 346 |
< |
sb->next = NULL; |
| 347 |
< |
return(sb); |
| 340 |
> |
do { |
| 341 |
> |
sb->sdata = (COLOR *)malloc((sl>>sr)*ns*sizeof(COLOR)); |
| 342 |
> |
if (sb->sdata == NULL) |
| 343 |
> |
syserror("malloc"); |
| 344 |
> |
sb->sampe = sr; |
| 345 |
> |
sb->nscans = ns; |
| 346 |
> |
sb->len = sl>>sr; |
| 347 |
> |
sb->nread = 0; |
| 348 |
> |
ns <<= 1; |
| 349 |
> |
sb++; |
| 350 |
> |
} while (--sr >= 0); |
| 351 |
> |
return(sbarr); |
| 352 |
|
} |
| 353 |
|
|
| 354 |
|
|
| 392 |
|
tsampr(y,fvxr-1) = tsampr(y,fvxr-2); |
| 393 |
|
} |
| 394 |
|
/* initialize with next power of two */ |
| 395 |
< |
rootbar = sballoc(2<<(int)(log(maxsr)/log(2.)), 2, scanlen(&inpres)); |
| 395 |
> |
rootbar = sballoc((int)(log(maxsr)/log(2.))+1, 2, scanlen(&inpres)); |
| 396 |
|
} |
