1 |
– |
/* Copyright (c) 1989 Regents of the University of California */ |
2 |
– |
|
1 |
|
#ifndef lint |
2 |
< |
static char SCCSid[] = "$SunId$ LBL"; |
2 |
> |
static const char RCSid[] = "$Id$"; |
3 |
|
#endif |
6 |
– |
|
4 |
|
/* |
5 |
|
* colortab.c - allocate and control dynamic color table. |
6 |
|
* |
11 |
|
* histogram is cleared. This algorithm |
12 |
|
* performs only as well as the next drawing's color |
13 |
|
* distribution is correlated to the last. |
14 |
+ |
* |
15 |
+ |
* External symbols declared in drvier.h |
16 |
|
*/ |
17 |
|
|
18 |
< |
#include "color.h" |
18 |
> |
/* ==================================================================== |
19 |
> |
* The Radiance Software License, Version 1.0 |
20 |
> |
* |
21 |
> |
* Copyright (c) 1990 - 2002 The Regents of the University of California, |
22 |
> |
* through Lawrence Berkeley National Laboratory. All rights reserved. |
23 |
> |
* |
24 |
> |
* Redistribution and use in source and binary forms, with or without |
25 |
> |
* modification, are permitted provided that the following conditions |
26 |
> |
* are met: |
27 |
> |
* |
28 |
> |
* 1. Redistributions of source code must retain the above copyright |
29 |
> |
* notice, this list of conditions and the following disclaimer. |
30 |
> |
* |
31 |
> |
* 2. Redistributions in binary form must reproduce the above copyright |
32 |
> |
* notice, this list of conditions and the following disclaimer in |
33 |
> |
* the documentation and/or other materials provided with the |
34 |
> |
* distribution. |
35 |
> |
* |
36 |
> |
* 3. The end-user documentation included with the redistribution, |
37 |
> |
* if any, must include the following acknowledgment: |
38 |
> |
* "This product includes Radiance software |
39 |
> |
* (http://radsite.lbl.gov/) |
40 |
> |
* developed by the Lawrence Berkeley National Laboratory |
41 |
> |
* (http://www.lbl.gov/)." |
42 |
> |
* Alternately, this acknowledgment may appear in the software itself, |
43 |
> |
* if and wherever such third-party acknowledgments normally appear. |
44 |
> |
* |
45 |
> |
* 4. The names "Radiance," "Lawrence Berkeley National Laboratory" |
46 |
> |
* and "The Regents of the University of California" must |
47 |
> |
* not be used to endorse or promote products derived from this |
48 |
> |
* software without prior written permission. For written |
49 |
> |
* permission, please contact [email protected]. |
50 |
> |
* |
51 |
> |
* 5. Products derived from this software may not be called "Radiance", |
52 |
> |
* nor may "Radiance" appear in their name, without prior written |
53 |
> |
* permission of Lawrence Berkeley National Laboratory. |
54 |
> |
* |
55 |
> |
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
56 |
> |
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
57 |
> |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
58 |
> |
* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR |
59 |
> |
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
60 |
> |
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
61 |
> |
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
62 |
> |
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
63 |
> |
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
64 |
> |
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
65 |
> |
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
66 |
> |
* SUCH DAMAGE. |
67 |
> |
* ==================================================================== |
68 |
> |
* |
69 |
> |
* This software consists of voluntary contributions made by many |
70 |
> |
* individuals on behalf of Lawrence Berkeley National Laboratory. For more |
71 |
> |
* information on Lawrence Berkeley National Laboratory, please see |
72 |
> |
* <http://www.lbl.gov/>. |
73 |
> |
*/ |
74 |
|
|
75 |
< |
#define NULL 0 |
75 |
> |
#include "standard.h" |
76 |
> |
|
77 |
> |
#include "color.h" |
78 |
|
/* histogram resolution */ |
79 |
|
#define NRED 24 |
80 |
|
#define NGRN 32 |
83 |
|
/* minimum box count for adaptive partition */ |
84 |
|
#define MINSAMP 7 |
85 |
|
/* maximum distance^2 before color reassign */ |
86 |
< |
#define MAXDST2 5 |
31 |
< |
/* maximum frame buffer depth */ |
32 |
< |
#define FBDEPTH 8 |
33 |
< |
/* color map resolution */ |
34 |
< |
#define MAPSIZ 256 |
86 |
> |
#define MAXDST2 12 |
87 |
|
/* map a color */ |
88 |
< |
#define map_col(c,p) clrmap[ colval(c,p)<1. ? \ |
89 |
< |
(int)(colval(c,p)*MAPSIZ) : MAPSIZ-1 ] |
88 |
> |
#define map_col(c,p) clrmap[p][ colval(c,p)<1. ? \ |
89 |
> |
(int)(colval(c,p)*256.) : 255 ] |
90 |
|
/* color partition tree */ |
91 |
|
#define CNODE short |
92 |
< |
#define set_branch(p,c) ((c)<<2|(p)) |
92 |
> |
#define set_branch(p,c) ((c)<<2|(p)) |
93 |
|
#define set_pval(pv) ((pv)<<2|3) |
94 |
+ |
#define is_branch(cn) (((cn)&3)!=3) |
95 |
|
#define is_pval(cn) (((cn)&3)==3) |
96 |
|
#define part(cn) ((cn)>>2) |
97 |
|
#define prim(cn) ((cn)&3) |
98 |
|
#define pval(cn) ((cn)>>2) |
99 |
|
/* our color table */ |
100 |
< |
struct tabent { |
100 |
> |
static struct tabent { |
101 |
|
long sum[3]; /* sum of colors using this entry */ |
102 |
< |
long n; /* number of colors */ |
103 |
< |
short ent[3]; /* current table value */ |
104 |
< |
} clrtab[1<<FBDEPTH]; |
102 |
> |
int n; /* number of colors */ |
103 |
> |
BYTE ent[3]; /* current table value */ |
104 |
> |
} *clrtab = NULL; |
105 |
> |
/* color cube partition */ |
106 |
> |
static CNODE *ctree = NULL; |
107 |
|
/* our color correction map */ |
108 |
< |
static BYTE clrmap[MAPSIZ]; |
108 |
> |
static BYTE clrmap[3][256]; |
109 |
|
/* histogram of colors used */ |
110 |
< |
static unsigned histo[NRED][NGRN][NBLU]; |
111 |
< |
/* initial color cube boundaries */ |
112 |
< |
static int CLRCUBE[3][2] = {0,NRED,0,NGRN,0,NBLU}; |
58 |
< |
/* color cube partition */ |
59 |
< |
static CNODE ctree[1<<(FBDEPTH+1)]; |
60 |
< |
/* callback for pixel assignment */ |
61 |
< |
static int (*set_pixel)(); |
110 |
> |
static unsigned short histo[NRED][NGRN][NBLU]; |
111 |
> |
/* initial color cube boundary */ |
112 |
> |
static int CLRCUBE[3][2] = {{0,NRED},{0,NGRN},{0,NBLU}}; |
113 |
|
|
114 |
+ |
static int split(); |
115 |
+ |
static void cut(); |
116 |
|
|
117 |
+ |
|
118 |
|
int |
119 |
< |
new_ctab(ncolors, cset) /* start new color table with max ncolors */ |
119 |
> |
new_ctab(ncolors) /* start new color table with max ncolors */ |
120 |
|
int ncolors; |
67 |
– |
int (*cset)(); |
121 |
|
{ |
122 |
< |
if (ncolors < 1 || ncolors > 1<<FBDEPTH || cset == NULL) |
122 |
> |
int treesize; |
123 |
> |
|
124 |
> |
if (ncolors < 1) |
125 |
|
return(0); |
126 |
< |
/* assign pixel callback routine */ |
127 |
< |
set_pixel = cset; |
128 |
< |
/* clear color table */ |
129 |
< |
bzero(clrtab, sizeof(clrtab)); |
126 |
> |
/* free old tables */ |
127 |
> |
if (clrtab != NULL) |
128 |
> |
free((void *)clrtab); |
129 |
> |
if (ctree != NULL) |
130 |
> |
free((void *)ctree); |
131 |
> |
/* get new tables */ |
132 |
> |
for (treesize = 1; treesize < ncolors; treesize <<= 1) |
133 |
> |
; |
134 |
> |
treesize <<= 1; |
135 |
> |
clrtab = (struct tabent *)calloc(ncolors, sizeof(struct tabent)); |
136 |
> |
ctree = (CNODE *)malloc(treesize*sizeof(CNODE)); |
137 |
> |
if (clrtab == NULL || ctree == NULL) |
138 |
> |
return(0); |
139 |
|
/* partition color space */ |
140 |
< |
cut(ctree, FBDEPTH, CLRCUBE, 0, ncolors); |
140 |
> |
cut(ctree, 0, CLRCUBE, 0, ncolors); |
141 |
|
/* clear histogram */ |
142 |
< |
bzero(histo, sizeof(histo)); |
142 |
> |
bzero((char *)histo, sizeof(histo)); |
143 |
|
/* return number of colors used */ |
144 |
|
return(ncolors); |
145 |
|
} |
146 |
|
|
147 |
|
|
148 |
|
int |
149 |
< |
get_pixel(col) /* get pixel for color */ |
149 |
> |
get_pixel(col, set_pixel) /* get pixel for color */ |
150 |
|
COLOR col; |
151 |
+ |
void (*set_pixel)(); |
152 |
|
{ |
153 |
|
int r, g, b; |
154 |
|
int cv[3]; |
155 |
< |
register union { CNODE *t; struct tabent *e; } p; |
155 |
> |
register CNODE *tp; |
156 |
|
register int h; |
157 |
|
/* map color */ |
158 |
|
r = map_col(col,RED); |
165 |
|
/* add to histogram */ |
166 |
|
histo[cv[RED]][cv[GRN]][cv[BLU]]++; |
167 |
|
/* find pixel in tree */ |
168 |
< |
p.t = ctree; |
169 |
< |
for (h = FBDEPTH; h > 0; h--) { |
170 |
< |
if (is_pval(*p.t)) |
106 |
< |
break; |
107 |
< |
if (cv[prim(*p.t)] < part(*p.t)) |
108 |
< |
p.t++; /* left branch */ |
168 |
> |
for (tp = ctree, h = 0; is_branch(*tp); h++) |
169 |
> |
if (cv[prim(*tp)] < part(*tp)) |
170 |
> |
tp += 1<<h; /* left branch */ |
171 |
|
else |
172 |
< |
p.t += 1<<h; /* right branch */ |
173 |
< |
} |
112 |
< |
h = pval(*p.t); |
172 |
> |
tp += 1<<(h+1); /* right branch */ |
173 |
> |
h = pval(*tp); |
174 |
|
/* add to color table */ |
175 |
< |
p.e = clrtab + h; |
176 |
< |
/* add to sum */ |
177 |
< |
p.e->sum[RED] += r; |
178 |
< |
p.e->sum[GRN] += g; |
118 |
< |
p.e->sum[BLU] += b; |
119 |
< |
p.e->n++; |
175 |
> |
clrtab[h].sum[RED] += r; |
176 |
> |
clrtab[h].sum[GRN] += g; |
177 |
> |
clrtab[h].sum[BLU] += b; |
178 |
> |
clrtab[h].n++; |
179 |
|
/* recompute average */ |
180 |
< |
r = p.e->sum[RED] / p.e->n; |
181 |
< |
g = p.e->sum[GRN] / p.e->n; |
182 |
< |
b = p.e->sum[BLU] / p.e->n; |
180 |
> |
r = clrtab[h].sum[RED] / clrtab[h].n; |
181 |
> |
g = clrtab[h].sum[GRN] / clrtab[h].n; |
182 |
> |
b = clrtab[h].sum[BLU] / clrtab[h].n; |
183 |
|
/* check for movement */ |
184 |
< |
if (p.e->n == 1 || |
185 |
< |
(r-p.e->ent[RED])*(r-p.e->ent[RED]) + |
186 |
< |
(g-p.e->ent[GRN])*(g-p.e->ent[GRN]) + |
187 |
< |
(b-p.e->ent[BLU])*(b-p.e->ent[BLU]) > MAXDST2) { |
188 |
< |
p.e->ent[RED] = r; |
189 |
< |
p.e->ent[GRN] = g; /* reassign pixel */ |
190 |
< |
p.e->ent[BLU] = b; |
191 |
< |
#ifdef notdef |
192 |
< |
printf("pixel %d = (%d,%d,%d) (%d refs)\n", |
193 |
< |
h, r, g, b, p.e->n); |
184 |
> |
if (clrtab[h].n == 1 || |
185 |
> |
(r-clrtab[h].ent[RED])*(r-clrtab[h].ent[RED]) + |
186 |
> |
(g-clrtab[h].ent[GRN])*(g-clrtab[h].ent[GRN]) + |
187 |
> |
(b-clrtab[h].ent[BLU])*(b-clrtab[h].ent[BLU]) > MAXDST2) { |
188 |
> |
clrtab[h].ent[RED] = r; |
189 |
> |
clrtab[h].ent[GRN] = g; /* reassign pixel */ |
190 |
> |
clrtab[h].ent[BLU] = b; |
191 |
> |
#ifdef DEBUG |
192 |
> |
sprintf(errmsg, "pixel %d = (%d,%d,%d) (%d refs)\n", |
193 |
> |
h, r, g, b, clrtab[h].n); |
194 |
> |
eputs(errmsg); |
195 |
|
#endif |
196 |
|
(*set_pixel)(h, r, g, b); |
197 |
|
} |
199 |
|
} |
200 |
|
|
201 |
|
|
202 |
< |
make_cmap(gam) /* make gamma correction map */ |
203 |
< |
double gam; |
202 |
> |
void |
203 |
> |
make_gmap(gam) /* make gamma correction map */ |
204 |
> |
double gam; |
205 |
|
{ |
145 |
– |
extern double pow(); |
206 |
|
register int i; |
207 |
|
|
208 |
< |
for (i = 0; i < MAPSIZ; i++) |
209 |
< |
clrmap[i] = 256.0 * pow(i/(double)MAPSIZ, 1.0/gam); |
208 |
> |
for (i = 0; i < 256; i++) |
209 |
> |
clrmap[RED][i] = |
210 |
> |
clrmap[GRN][i] = |
211 |
> |
clrmap[BLU][i] = 256.0 * pow((i+0.5)/256.0, 1.0/gam); |
212 |
|
} |
213 |
|
|
214 |
|
|
215 |
< |
static |
216 |
< |
cut(tree, height, box, c0, c1) /* partition color space */ |
215 |
> |
void |
216 |
> |
set_cmap(rmap, gmap, bmap) /* set custom color correction map */ |
217 |
> |
BYTE *rmap, *gmap, *bmap; |
218 |
> |
{ |
219 |
> |
bcopy((char *)rmap, (char *)clrmap[RED], 256); |
220 |
> |
bcopy((char *)gmap, (char *)clrmap[GRN], 256); |
221 |
> |
bcopy((char *)bmap, (char *)clrmap[BLU], 256); |
222 |
> |
} |
223 |
> |
|
224 |
> |
|
225 |
> |
void |
226 |
> |
map_color(rgb, col) /* map a color to a byte triplet */ |
227 |
> |
BYTE rgb[3]; |
228 |
> |
COLOR col; |
229 |
> |
{ |
230 |
> |
rgb[RED] = map_col(col,RED); |
231 |
> |
rgb[GRN] = map_col(col,GRN); |
232 |
> |
rgb[BLU] = map_col(col,BLU); |
233 |
> |
} |
234 |
> |
|
235 |
> |
|
236 |
> |
static void |
237 |
> |
cut(tree, level, box, c0, c1) /* partition color space */ |
238 |
|
register CNODE *tree; |
239 |
< |
int height; |
239 |
> |
int level; |
240 |
|
register int box[3][2]; |
241 |
|
int c0, c1; |
242 |
|
{ |
248 |
|
} |
249 |
|
/* split box */ |
250 |
|
*tree = split(box); |
251 |
< |
bcopy(box, kb, sizeof(kb)); |
251 |
> |
bcopy((char *)box, (char *)kb, sizeof(kb)); |
252 |
|
/* do left (lesser) branch */ |
253 |
|
kb[prim(*tree)][1] = part(*tree); |
254 |
< |
cut(tree+1, height-1, kb, c0, (c0+c1)>>1); |
254 |
> |
cut(tree+(1<<level), level+1, kb, c0, (c0+c1)>>1); |
255 |
|
/* do right branch */ |
256 |
|
kb[prim(*tree)][0] = part(*tree); |
257 |
|
kb[prim(*tree)][1] = box[prim(*tree)][1]; |
258 |
< |
cut(tree+(1<<height), height-1, kb, (c0+c1)>>1, c1); |
258 |
> |
cut(tree+(1<<(level+1)), level+1, kb, (c0+c1)>>1, c1); |
259 |
|
} |
260 |
|
|
261 |
|
|
266 |
|
#define c0 r |
267 |
|
register int r, g, b; |
268 |
|
int pri; |
269 |
< |
int t[HMAX], med; |
269 |
> |
long t[HMAX], med; |
270 |
|
/* find dominant axis */ |
271 |
|
pri = RED; |
272 |
|
if (box[GRN][1]-box[GRN][0] > box[pri][1]-box[pri][0]) |