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|
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/****************** ACUITY STUFF *******************/ |
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|
| 149 |
< |
typedef struct scanbar { |
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< |
short sampr; /* sample area size (power of 2) */ |
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> |
typedef struct { |
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> |
short sampe; /* sample area size (exponent of 2) */ |
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short nscans; /* number of scanlines in this bar */ |
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int len; /* individual scanline length */ |
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– |
struct scanbar *next; /* next higher resolution scanbar */ |
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int nread; /* number of scanlines loaded */ |
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< |
/* followed by the scanline data */ |
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> |
COLOR *sdata; /* scanbar data */ |
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} SCANBAR; |
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|
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< |
#define bscan(sb,y) ((COLOR *)((sb)+1)+((y)%(sb)->nscans)*(sb)->len) |
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> |
#define bscan(sb,y) ((COLOR *)(sb)->sdata+((y)%(sb)->nscans)*(sb)->len) |
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|
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SCANBAR *rootbar; /* root scan bar (lowest resolution) */ |
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|
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return(NULL); |
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for ( ; y >= sb->nread; sb->nread++) { /* read as necessary */ |
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mysl = bscan(sb, sb->nread); |
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< |
if (sb->sampr == 1) { |
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> |
if (sb->sampe == 0) { |
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if (freadscan(mysl, sb->len, infp) < 0) { |
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fprintf(stderr, "%s: %s: scanline read error\n", |
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progname, infn); |
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exit(1); |
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} |
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} else { |
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< |
sl0 = getascan(sb->next, 2*y); |
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> |
sl0 = getascan(sb+1, 2*y); |
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if (sl0 == NULL) |
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return(NULL); |
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< |
sl1 = getascan(sb->next, 2*y+1); |
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> |
sl1 = getascan(sb+1, 2*y+1); |
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for (i = 0; i < sb->len; i++) { |
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copycolor(mysl[i], sl0[2*i]); |
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addcolor(mysl[i], sl0[2*i+1]); |
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double d; |
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register SCANBAR *sb0; |
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|
| 269 |
< |
for (sb0 = rootbar; sb0->next != NULL && sb0->next->sampr > sr; |
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< |
sb0 = sb0->next) |
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> |
for (sb0 = rootbar; sb0->sampe != 0 && 1<<sb0[1].sampe > sr; sb0++) |
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; |
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ascanval(col, x, y, sb0); |
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< |
if (sb0->next == NULL) /* don't extrapolate highest */ |
| 272 |
> |
if (sb0->sampe == 0) /* don't extrapolate highest */ |
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|
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); |
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scalecolor(col, 1.-d); |
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scalecolor(c1, d); |
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addcolor(col, c1); |
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double dx, dy; |
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int ix, iy; |
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|
| 291 |
< |
if (sb->sampr == 1) { /* no need to interpolate */ |
| 291 |
> |
if (sb->sampe == 0) { /* no need to interpolate */ |
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sl0 = getascan(sb, y); |
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copycolor(col, sl0[x]); |
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return; |
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} |
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/* compute coordinates for sb */ |
| 297 |
< |
ix = dx = (x+.5)/sb->sampr - .5; |
| 297 |
> |
ix = dx = (x+.5)/(1<<sb->sampe) - .5; |
| 298 |
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while (ix >= sb->len-1) ix--; |
| 299 |
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dx -= (double)ix; |
| 300 |
< |
iy = dy = (y+.5)/sb->sampr - .5; |
| 301 |
< |
while (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 |
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dy -= (double)iy; |
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/* get scanlines */ |
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sl0 = getascan(sb, iy); |
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int ns; /* number of scanlines */ |
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|
int sl; /* original scanline length */ |
| 333 |
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{ |
| 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 |
|
} |
