| 28 |
|
#define MINSAMP 7 |
| 29 |
|
/* maximum distance^2 before color reassign */ |
| 30 |
|
#define MAXDST2 12 |
| 31 |
– |
/* maximum frame buffer depth */ |
| 32 |
– |
#define FBDEPTH 8 |
| 31 |
|
/* map a color */ |
| 32 |
|
#define map_col(c,p) clrmap[p][ colval(c,p)<1. ? \ |
| 33 |
|
(int)(colval(c,p)*256.) : 255 ] |
| 45 |
|
long sum[3]; /* sum of colors using this entry */ |
| 46 |
|
long n; /* number of colors */ |
| 47 |
|
short ent[3]; /* current table value */ |
| 48 |
< |
} clrtab[1<<FBDEPTH]; |
| 48 |
> |
} *clrtab = NULL; |
| 49 |
> |
/* color cube partition */ |
| 50 |
> |
static CNODE *ctree = NULL; |
| 51 |
|
/* our color correction map */ |
| 52 |
|
static BYTE clrmap[3][256]; |
| 53 |
|
/* histogram of colors used */ |
| 54 |
|
static unsigned histo[NRED][NGRN][NBLU]; |
| 55 |
< |
/* initial color cube boundaries */ |
| 55 |
> |
/* initial color cube boundary */ |
| 56 |
|
static int CLRCUBE[3][2] = {0,NRED,0,NGRN,0,NBLU}; |
| 57 |
– |
/* color cube partition */ |
| 58 |
– |
static CNODE ctree[1<<(FBDEPTH+1)]; |
| 57 |
|
|
| 58 |
|
|
| 59 |
|
int |
| 60 |
|
new_ctab(ncolors) /* start new color table with max ncolors */ |
| 61 |
|
int ncolors; |
| 62 |
|
{ |
| 63 |
+ |
int treesize; |
| 64 |
+ |
|
| 65 |
|
if (ncolors < 1) |
| 66 |
|
return(0); |
| 67 |
< |
if (ncolors > 1<<FBDEPTH) |
| 68 |
< |
ncolors = 1<<FBDEPTH; |
| 69 |
< |
/* clear color table */ |
| 70 |
< |
bzero(clrtab, sizeof(clrtab)); |
| 67 |
> |
/* free old tables */ |
| 68 |
> |
if (clrtab != NULL) |
| 69 |
> |
free((char *)clrtab); |
| 70 |
> |
if (ctree != NULL) |
| 71 |
> |
free((char *)ctree); |
| 72 |
> |
/* get new tables */ |
| 73 |
> |
for (treesize = 1; treesize < ncolors; treesize <<= 1) |
| 74 |
> |
; |
| 75 |
> |
treesize <<= 1; |
| 76 |
> |
clrtab = (struct tabent *)calloc(ncolors, sizeof(struct tabent)); |
| 77 |
> |
ctree = (CNODE *)malloc(treesize*sizeof(CNODE)); |
| 78 |
> |
if (clrtab == NULL || ctree == NULL) |
| 79 |
> |
return(0); |
| 80 |
|
/* partition color space */ |
| 81 |
|
cut(ctree, 0, CLRCUBE, 0, ncolors); |
| 82 |
|
/* clear histogram */ |
