| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: sm_samp.c,v 3.8 2003/06/20 00:25:49 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* sm_samp.c |
| 6 |
*/ |
| 7 |
|
| 8 |
#include <string.h> |
| 9 |
|
| 10 |
#include "standard.h" |
| 11 |
#include "sm_flag.h" |
| 12 |
#include "rhd_sample.h" |
| 13 |
|
| 14 |
SAMP rsL; |
| 15 |
int32 *samp_flag=NULL; |
| 16 |
|
| 17 |
/* Each sample has a world coord point, and direction, brightness,chrominance, |
| 18 |
and RGB triples |
| 19 |
*/ |
| 20 |
|
| 21 |
#define TMSIZE sizeof(TMbright) |
| 22 |
#define SAMPSIZ (3*sizeof(SFLOAT)+sizeof(int32)+ 6*sizeof(BYTE) + TMSIZE + 2*sizeof(int)) |
| 23 |
|
| 24 |
/* Extra points world space point, vert flag and qt flag */ |
| 25 |
#define POINTSIZ (3*sizeof(SFLOAT) + 2*sizeof(int)) |
| 26 |
|
| 27 |
/* Clear the flags for all samples */ |
| 28 |
sClear_all_flags(s) |
| 29 |
SAMP *s; |
| 30 |
{ |
| 31 |
if(samp_flag) |
| 32 |
memset((char *)samp_flag, '\0', FLAG_BYTES(S_MAX_BASE_PT(s))); |
| 33 |
} |
| 34 |
|
| 35 |
sInit(s) |
| 36 |
SAMP *s; |
| 37 |
{ |
| 38 |
S_REPLACE_SAMP(s) = 0; |
| 39 |
S_NUM_SAMP(s) = 0; |
| 40 |
S_TONE_MAP(s) = 0; |
| 41 |
S_FREE_SAMP(s) = -1; |
| 42 |
sClear_base_points(s); |
| 43 |
|
| 44 |
} |
| 45 |
|
| 46 |
sFree(s) |
| 47 |
SAMP *s; |
| 48 |
{ |
| 49 |
if(S_BASE(s)) |
| 50 |
{ |
| 51 |
free(S_BASE(s)); |
| 52 |
S_BASE(s)=NULL; |
| 53 |
} |
| 54 |
if(samp_flag) |
| 55 |
{ |
| 56 |
free(samp_flag); |
| 57 |
samp_flag = NULL; |
| 58 |
} |
| 59 |
} |
| 60 |
/* Initialize/clear global smL sample list for at least n samples */ |
| 61 |
SAMP |
| 62 |
*sAlloc(nptr,extra_points) |
| 63 |
int *nptr,extra_points; |
| 64 |
{ |
| 65 |
unsigned nbytes; |
| 66 |
register unsigned i; |
| 67 |
SAMP *s; |
| 68 |
int n; |
| 69 |
|
| 70 |
s = &rsL; |
| 71 |
/* round space up to nearest power of 2 */ |
| 72 |
nbytes = (*nptr)*SAMPSIZ + extra_points*POINTSIZ + 8; |
| 73 |
for (i = 1024; nbytes > i; i <<= 1) |
| 74 |
; |
| 75 |
/* get number of samples that fit in block */ |
| 76 |
n = (i - 8 - extra_points*POINTSIZ) / SAMPSIZ; |
| 77 |
|
| 78 |
/* Must make sure n + extra_points can fit in a S_ID identifier */ |
| 79 |
if ( n > (S_ID_MAX - extra_points)) |
| 80 |
n = (S_ID_MAX - extra_points); |
| 81 |
|
| 82 |
S_BASE(s) = (char *)malloc(n*SAMPSIZ + extra_points*POINTSIZ); |
| 83 |
if (!S_BASE(s)) |
| 84 |
error(SYSTEM,"sAlloc(): Unable to allocate memory"); |
| 85 |
|
| 86 |
/* assign larger alignment types earlier */ |
| 87 |
S_W_PT(s) = (SFLOAT(*)[3])S_BASE(s); |
| 88 |
S_W_DIR(s) = (int32 *)(S_W_PT(s) + n + extra_points); |
| 89 |
S_BRT(s) = (TMbright *)(S_W_DIR(s) + n); |
| 90 |
S_CHR(s) = (BYTE (*)[3])(S_BRT(s) + n); |
| 91 |
S_RGB(s) = (BYTE (*)[3])(S_CHR(s) + n); |
| 92 |
S_INFO(s) = (int *)(S_RGB(s)+n); |
| 93 |
S_INFO1(s) = (int *)(S_INFO(s)+n+extra_points); |
| 94 |
S_MAX_SAMP(s) = n; |
| 95 |
S_MAX_BASE_PT(s) = n + extra_points; |
| 96 |
|
| 97 |
/* Allocate memory for a per/sample bit flag */ |
| 98 |
if(!(samp_flag = (int32 *)malloc(FLAG_BYTES(n+extra_points)))) |
| 99 |
error(SYSTEM,"sAlloc(): Unable to allocate flag memory"); |
| 100 |
sInit(s); |
| 101 |
sClear_all_flags(s); |
| 102 |
|
| 103 |
*nptr = n; |
| 104 |
|
| 105 |
return(s); |
| 106 |
} |
| 107 |
|
| 108 |
|
| 109 |
/* Add a base point to the sample structure: only the world point |
| 110 |
is added: These points are not displayed-they are used to form the |
| 111 |
initial mesh |
| 112 |
*/ |
| 113 |
S_ID |
| 114 |
sAdd_base_point(s,v) |
| 115 |
SAMP *s; |
| 116 |
FVECT v; |
| 117 |
{ |
| 118 |
S_ID id; |
| 119 |
|
| 120 |
/* Get pointer to next available point */ |
| 121 |
id = S_NEXT_BASE_PT(s); |
| 122 |
if(id >= S_MAX_BASE_PT(s)) |
| 123 |
return(-1); |
| 124 |
|
| 125 |
/* Update free aux pointer */ |
| 126 |
S_NEXT_BASE_PT(s)++; |
| 127 |
|
| 128 |
/* Copy vector into point */ |
| 129 |
VCOPY(S_NTH_W_PT(s,id),v); |
| 130 |
return(id); |
| 131 |
} |
| 132 |
|
| 133 |
/* Copy the values of sample n_id into sample id: Note must not call with |
| 134 |
Base point n_id |
| 135 |
*/ |
| 136 |
int |
| 137 |
sCopy_samp(s,n_id,id) |
| 138 |
SAMP *s; |
| 139 |
S_ID n_id,id; |
| 140 |
{ |
| 141 |
|
| 142 |
#ifdef DEBUG |
| 143 |
if(id <0||id >= S_MAX_SAMP(s)||n_id <0||n_id >= S_MAX_SAMP(s)) |
| 144 |
{ |
| 145 |
eputs("smReset_sample():invalid sample id\n"); |
| 146 |
return(0); |
| 147 |
} |
| 148 |
#endif |
| 149 |
if(n_id == id) |
| 150 |
return(1); |
| 151 |
/* Copy vector into point */ |
| 152 |
VCOPY(S_NTH_W_PT(s,n_id),S_NTH_W_PT(s,id)); |
| 153 |
S_NTH_W_DIR(s,n_id) = S_NTH_W_DIR(s,id); |
| 154 |
|
| 155 |
S_NTH_BRT(s,n_id) = S_NTH_BRT(s,id); |
| 156 |
S_NTH_CHR(s,n_id)[0] = S_NTH_CHR(s,id)[0]; |
| 157 |
S_NTH_CHR(s,n_id)[1] = S_NTH_CHR(s,id)[1]; |
| 158 |
S_NTH_CHR(s,n_id)[2] = S_NTH_CHR(s,id)[2]; |
| 159 |
|
| 160 |
return(1); |
| 161 |
} |
| 162 |
|
| 163 |
|
| 164 |
/* Initialize the sample 'id' to contain world point 'p', direction 'd' and |
| 165 |
color 'c'. If 'p' is NULL, a direction only is represented in 'd'. In |
| 166 |
this case, the world point is set to the projection of the direction on |
| 167 |
the view sphere, and the direction value is set to -1 |
| 168 |
*/ |
| 169 |
void |
| 170 |
sInit_samp(s,id,c,d,p,o_id) |
| 171 |
SAMP *s; |
| 172 |
S_ID id; |
| 173 |
COLR c; |
| 174 |
FVECT d,p; |
| 175 |
S_ID o_id; |
| 176 |
{ |
| 177 |
|
| 178 |
if(o_id != INVALID) |
| 179 |
sCopy_samp(s,id,o_id); |
| 180 |
else |
| 181 |
{ |
| 182 |
/* Copy vector into point */ |
| 183 |
VCOPY(S_NTH_W_PT(s,id),p); |
| 184 |
if(d) |
| 185 |
S_NTH_W_DIR(s,id) = encodedir(d); |
| 186 |
else |
| 187 |
S_NTH_W_DIR(s,id) = -1; |
| 188 |
|
| 189 |
/* calculate the brightness and chrominance,RGB will be set by |
| 190 |
tonemapping |
| 191 |
*/ |
| 192 |
tmCvColrs(&S_NTH_BRT(s,id),S_NTH_CHR(s,id),c,1); |
| 193 |
} |
| 194 |
/* Set ACTIVE bit upon creation */ |
| 195 |
S_SET_FLAG(id); |
| 196 |
if(id < S_TONE_MAP(s)) |
| 197 |
tmMapPixels(S_NTH_RGB(s,id),&S_NTH_BRT(s,id),S_NTH_CHR(s,id),1); |
| 198 |
} |
| 199 |
|
| 200 |
|
| 201 |
/* Allocate a new sample. If an existing sample was replaced: set flag */ |
| 202 |
S_ID |
| 203 |
sAlloc_samp(s,replaced) |
| 204 |
SAMP *s; |
| 205 |
int *replaced; |
| 206 |
|
| 207 |
{ |
| 208 |
S_ID id; |
| 209 |
|
| 210 |
/* First check if there are any freed sample available */ |
| 211 |
if((id = S_FREE_SAMP(s)) != INVALID) |
| 212 |
{ |
| 213 |
*replaced = 0; |
| 214 |
#if 0 |
| 215 |
fprintf(stderr,"allocating previously freed sample %d\n",id); |
| 216 |
#endif |
| 217 |
S_FREE_SAMP(s) = S_NTH_NEXT(s,id); |
| 218 |
return(id); |
| 219 |
} |
| 220 |
/* If havn't reached end of sample array:return next sample */ |
| 221 |
if(S_NUM_SAMP(s) < S_MAX_SAMP(s)) |
| 222 |
{ |
| 223 |
id = S_NUM_SAMP(s)++; |
| 224 |
#if 0 |
| 225 |
fprintf(stderr,"allocating sample %d\n",id); |
| 226 |
#endif |
| 227 |
*replaced = 0; |
| 228 |
return(id); |
| 229 |
} |
| 230 |
|
| 231 |
#ifdef DEBUG |
| 232 |
{ |
| 233 |
static int replace = 0; |
| 234 |
if(replace == 0) |
| 235 |
{ |
| 236 |
eputs("Out of samples: using replacement strategy\n"); |
| 237 |
replace =1 ; |
| 238 |
} |
| 239 |
} |
| 240 |
#endif |
| 241 |
|
| 242 |
/* CLOCKED LRU replacement policy: Search through samples starting |
| 243 |
with S_REPLACE_SAMP for a sample that does not have its active |
| 244 |
bit set. Clear bit along the way |
| 245 |
*/ |
| 246 |
id = S_REPLACE_SAMP(s); |
| 247 |
while(S_IS_FLAG(id)) |
| 248 |
{ |
| 249 |
S_CLR_FLAG(id); |
| 250 |
id = (id +1)% S_MAX_SAMP(s); |
| 251 |
} |
| 252 |
S_REPLACE_SAMP(s) = (id +1)% S_MAX_SAMP(s); |
| 253 |
*replaced = 1; |
| 254 |
return(id); |
| 255 |
} |
| 256 |
|
| 257 |
|
| 258 |
|
| 259 |
|
| 260 |
|
| 261 |
|
| 262 |
|
| 263 |
|
| 264 |
|
| 265 |
|
| 266 |
|
| 267 |
|
| 268 |
|
| 269 |
|
| 270 |
|
| 271 |
|
| 272 |
|
