1 |
greg |
2.1 |
#ifndef lint |
2 |
greg |
2.29 |
static const char RCSid[] = "$Id: cmatrix.c,v 2.28 2020/03/30 20:41:47 greg Exp $"; |
3 |
greg |
2.1 |
#endif |
4 |
|
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/* |
5 |
|
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* Color matrix routines. |
6 |
|
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* |
7 |
|
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* G. Ward |
8 |
|
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*/ |
9 |
|
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10 |
|
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#include <ctype.h> |
11 |
schorsch |
2.16 |
#include "platform.h" |
12 |
greg |
2.1 |
#include "standard.h" |
13 |
|
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#include "cmatrix.h" |
14 |
|
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#include "platform.h" |
15 |
greg |
2.14 |
#include "paths.h" |
16 |
greg |
2.2 |
#include "resolu.h" |
17 |
|
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|
18 |
|
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const char *cm_fmt_id[] = { |
19 |
greg |
2.24 |
"unknown", COLRFMT, CIEFMT, |
20 |
|
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"float", "ascii", "double" |
21 |
greg |
2.2 |
}; |
22 |
|
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|
23 |
|
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const int cm_elem_size[] = { |
24 |
greg |
2.26 |
0, 4, 4, 3*sizeof(float), 0, 3*sizeof(double) |
25 |
greg |
2.2 |
}; |
26 |
greg |
2.1 |
|
27 |
|
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/* Allocate a color coefficient matrix */ |
28 |
|
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CMATRIX * |
29 |
|
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cm_alloc(int nrows, int ncols) |
30 |
|
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{ |
31 |
|
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CMATRIX *cm; |
32 |
|
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|
33 |
|
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if ((nrows <= 0) | (ncols <= 0)) |
34 |
|
|
error(USER, "attempt to create empty matrix"); |
35 |
|
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cm = (CMATRIX *)malloc(sizeof(CMATRIX) + |
36 |
greg |
2.29 |
sizeof(COLOR)*((size_t)nrows*ncols - 1)); |
37 |
greg |
2.21 |
if (!cm) |
38 |
greg |
2.1 |
error(SYSTEM, "out of memory in cm_alloc()"); |
39 |
|
|
cm->nrows = nrows; |
40 |
|
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cm->ncols = ncols; |
41 |
|
|
return(cm); |
42 |
|
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} |
43 |
|
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|
44 |
greg |
2.6 |
static void |
45 |
|
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adjacent_ra_sizes(size_t bounds[2], size_t target) |
46 |
|
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{ |
47 |
|
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bounds[0] = 0; bounds[1] = 2048; |
48 |
|
|
while (bounds[1] < target) { |
49 |
|
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bounds[0] = bounds[1]; |
50 |
|
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bounds[1] += bounds[1]>>1; |
51 |
|
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} |
52 |
|
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} |
53 |
|
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|
54 |
greg |
2.1 |
/* Resize color coefficient matrix */ |
55 |
|
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CMATRIX * |
56 |
|
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cm_resize(CMATRIX *cm, int nrows) |
57 |
|
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{ |
58 |
greg |
2.6 |
size_t old_size, new_size, ra_bounds[2]; |
59 |
|
|
|
60 |
greg |
2.21 |
if (!cm) |
61 |
|
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return(NULL); |
62 |
greg |
2.1 |
if (nrows == cm->nrows) |
63 |
|
|
return(cm); |
64 |
|
|
if (nrows <= 0) { |
65 |
|
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cm_free(cm); |
66 |
|
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return(NULL); |
67 |
|
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} |
68 |
greg |
2.6 |
old_size = sizeof(CMATRIX) + sizeof(COLOR)*(cm->nrows*cm->ncols - 1); |
69 |
|
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adjacent_ra_sizes(ra_bounds, old_size); |
70 |
|
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new_size = sizeof(CMATRIX) + sizeof(COLOR)*(nrows*cm->ncols - 1); |
71 |
|
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if (nrows < cm->nrows ? new_size <= ra_bounds[0] : |
72 |
|
|
new_size > ra_bounds[1]) { |
73 |
|
|
adjacent_ra_sizes(ra_bounds, new_size); |
74 |
|
|
cm = (CMATRIX *)realloc(cm, ra_bounds[1]); |
75 |
greg |
2.21 |
if (!cm) |
76 |
greg |
2.6 |
error(SYSTEM, "out of memory in cm_resize()"); |
77 |
|
|
} |
78 |
greg |
2.1 |
cm->nrows = nrows; |
79 |
|
|
return(cm); |
80 |
|
|
} |
81 |
|
|
|
82 |
greg |
2.5 |
typedef struct { |
83 |
|
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int dtype; /* data type */ |
84 |
greg |
2.22 |
int need2swap; /* need byte swap? */ |
85 |
greg |
2.5 |
int nrows, ncols; /* matrix size */ |
86 |
greg |
2.25 |
COLOR expos; /* exposure value */ |
87 |
greg |
2.5 |
char *err; /* error message */ |
88 |
|
|
} CMINFO; /* header info record */ |
89 |
|
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|
90 |
greg |
2.1 |
static int |
91 |
greg |
2.5 |
get_cminfo(char *s, void *p) |
92 |
greg |
2.1 |
{ |
93 |
greg |
2.5 |
CMINFO *ip = (CMINFO *)p; |
94 |
greg |
2.20 |
char fmt[MAXFMTLEN]; |
95 |
greg |
2.2 |
int i; |
96 |
greg |
2.5 |
|
97 |
|
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if (!strncmp(s, "NCOMP=", 6) && atoi(s+6) != 3) { |
98 |
|
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ip->err = "unexpected # components (must be 3)"; |
99 |
|
|
return(-1); |
100 |
|
|
} |
101 |
|
|
if (!strncmp(s, "NROWS=", 6)) { |
102 |
|
|
ip->nrows = atoi(s+6); |
103 |
|
|
return(0); |
104 |
|
|
} |
105 |
|
|
if (!strncmp(s, "NCOLS=", 6)) { |
106 |
|
|
ip->ncols = atoi(s+6); |
107 |
|
|
return(0); |
108 |
|
|
} |
109 |
greg |
2.22 |
if ((i = isbigendian(s)) >= 0) { |
110 |
|
|
ip->need2swap = (nativebigendian() != i); |
111 |
|
|
return(0); |
112 |
|
|
} |
113 |
greg |
2.25 |
if (isexpos(s)) { |
114 |
|
|
double d = exposval(s); |
115 |
|
|
scalecolor(ip->expos, d); |
116 |
|
|
return(0); |
117 |
|
|
} |
118 |
|
|
if (iscolcor(s)) { |
119 |
|
|
COLOR ctmp; |
120 |
|
|
colcorval(ctmp, s); |
121 |
|
|
multcolor(ip->expos, ctmp); |
122 |
|
|
return(0); |
123 |
|
|
} |
124 |
greg |
2.2 |
if (!formatval(fmt, s)) |
125 |
|
|
return(0); |
126 |
|
|
for (i = 1; i < DTend; i++) |
127 |
|
|
if (!strcmp(fmt, cm_fmt_id[i])) |
128 |
greg |
2.5 |
ip->dtype = i; |
129 |
greg |
2.1 |
return(0); |
130 |
|
|
} |
131 |
|
|
|
132 |
greg |
2.5 |
/* Load header to obtain/check data type and number of columns */ |
133 |
|
|
char * |
134 |
greg |
2.25 |
cm_getheader(int *dt, int *nr, int *nc, int *swp, COLOR scale, FILE *fp) |
135 |
greg |
2.1 |
{ |
136 |
greg |
2.5 |
CMINFO cmi; |
137 |
|
|
/* read header */ |
138 |
|
|
cmi.dtype = DTfromHeader; |
139 |
greg |
2.22 |
cmi.need2swap = 0; |
140 |
greg |
2.25 |
cmi.expos[0] = cmi.expos[1] = cmi.expos[2] = 1.f; |
141 |
greg |
2.5 |
cmi.nrows = cmi.ncols = 0; |
142 |
|
|
cmi.err = "unexpected EOF in header"; |
143 |
greg |
2.7 |
if (getheader(fp, get_cminfo, &cmi) < 0) |
144 |
greg |
2.5 |
return(cmi.err); |
145 |
greg |
2.21 |
if (dt) { /* get/check data type? */ |
146 |
greg |
2.5 |
if (cmi.dtype == DTfromHeader) { |
147 |
|
|
if (*dt == DTfromHeader) |
148 |
|
|
return("missing/unknown data format in header"); |
149 |
|
|
} else if (*dt == DTfromHeader) |
150 |
|
|
*dt = cmi.dtype; |
151 |
|
|
else if (*dt != cmi.dtype) |
152 |
|
|
return("unexpected data format in header"); |
153 |
|
|
} |
154 |
greg |
2.21 |
if (nr) { /* get/check #rows? */ |
155 |
greg |
2.5 |
if (*nr <= 0) |
156 |
|
|
*nr = cmi.nrows; |
157 |
|
|
else if ((cmi.nrows > 0) & (*nr != cmi.nrows)) |
158 |
|
|
return("unexpected row count in header"); |
159 |
|
|
} |
160 |
greg |
2.21 |
if (nc) { /* get/check #columns? */ |
161 |
greg |
2.5 |
if (*nc <= 0) |
162 |
|
|
*nc = cmi.ncols; |
163 |
|
|
else if ((cmi.ncols > 0) & (*nc != cmi.ncols)) |
164 |
|
|
return("unexpected column count in header"); |
165 |
|
|
} |
166 |
greg |
2.22 |
if (swp) /* get/check swap? */ |
167 |
|
|
*swp = cmi.need2swap; |
168 |
greg |
2.25 |
if (scale) { /* transfer exposure comp. */ |
169 |
|
|
scale[0] = 1.f/cmi.expos[0]; |
170 |
|
|
scale[1] = 1.f/cmi.expos[1]; |
171 |
|
|
scale[2] = 1.f/cmi.expos[2]; |
172 |
|
|
} |
173 |
greg |
2.5 |
return(NULL); |
174 |
greg |
2.1 |
} |
175 |
|
|
|
176 |
greg |
2.23 |
/* Allocate and load image data into matrix */ |
177 |
|
|
static CMATRIX * |
178 |
greg |
2.25 |
cm_load_rgbe(FILE *fp, int nrows, int ncols, COLOR scale) |
179 |
greg |
2.23 |
{ |
180 |
greg |
2.25 |
int doscale; |
181 |
greg |
2.23 |
CMATRIX *cm; |
182 |
|
|
COLORV *mp; |
183 |
|
|
/* header already loaded */ |
184 |
|
|
cm = cm_alloc(nrows, ncols); |
185 |
|
|
if (!cm) |
186 |
|
|
return(NULL); |
187 |
greg |
2.25 |
doscale = (scale[0] < .99) | (scale[0] > 1.01) | |
188 |
|
|
(scale[1] < .99) | (scale[1] > 1.01) | |
189 |
|
|
(scale[2] < .99) | (scale[2] > 1.01) ; |
190 |
greg |
2.23 |
mp = cm->cmem; |
191 |
|
|
while (nrows--) { |
192 |
|
|
if (freadscan((COLOR *)mp, ncols, fp) < 0) { |
193 |
|
|
error(USER, "error reading color picture as matrix"); |
194 |
|
|
cm_free(cm); |
195 |
|
|
return(NULL); |
196 |
|
|
} |
197 |
greg |
2.25 |
if (doscale) { |
198 |
|
|
int i = ncols; |
199 |
|
|
while (i--) { |
200 |
|
|
*mp++ *= scale[0]; |
201 |
|
|
*mp++ *= scale[1]; |
202 |
|
|
*mp++ *= scale[2]; |
203 |
|
|
} |
204 |
|
|
} else |
205 |
|
|
mp += 3*ncols; |
206 |
greg |
2.23 |
} /* caller closes stream */ |
207 |
|
|
return(cm); |
208 |
|
|
} |
209 |
|
|
|
210 |
greg |
2.9 |
/* Allocate and load a matrix from the given input (or stdin if NULL) */ |
211 |
greg |
2.1 |
CMATRIX * |
212 |
greg |
2.9 |
cm_load(const char *inspec, int nrows, int ncols, int dtype) |
213 |
greg |
2.1 |
{ |
214 |
greg |
2.15 |
const int ROWINC = 2048; |
215 |
|
|
FILE *fp = stdin; |
216 |
greg |
2.22 |
int swap = 0; |
217 |
greg |
2.25 |
COLOR scale; |
218 |
greg |
2.15 |
CMATRIX *cm; |
219 |
greg |
2.1 |
|
220 |
greg |
2.21 |
if (!inspec) |
221 |
greg |
2.9 |
inspec = "<stdin>"; |
222 |
|
|
else if (inspec[0] == '!') { |
223 |
|
|
fp = popen(inspec+1, "r"); |
224 |
greg |
2.21 |
if (!fp) { |
225 |
greg |
2.9 |
sprintf(errmsg, "cannot start command '%s'", inspec); |
226 |
|
|
error(SYSTEM, errmsg); |
227 |
|
|
} |
228 |
greg |
2.21 |
} else if (!(fp = fopen(inspec, "r"))) { |
229 |
greg |
2.9 |
sprintf(errmsg, "cannot open file '%s'", inspec); |
230 |
greg |
2.1 |
error(SYSTEM, errmsg); |
231 |
|
|
} |
232 |
|
|
#ifdef getc_unlocked |
233 |
|
|
flockfile(fp); |
234 |
|
|
#endif |
235 |
|
|
if (dtype != DTascii) |
236 |
|
|
SET_FILE_BINARY(fp); /* doesn't really work */ |
237 |
greg |
2.5 |
if (!dtype | !ncols) { /* expecting header? */ |
238 |
greg |
2.25 |
char *err = cm_getheader(&dtype, &nrows, &ncols, &swap, scale, fp); |
239 |
greg |
2.21 |
if (err) |
240 |
greg |
2.5 |
error(USER, err); |
241 |
|
|
} |
242 |
greg |
2.28 |
if (ncols <= 0 && !fscnresolu(&ncols, &nrows, fp)) |
243 |
|
|
error(USER, "unspecified number of columns"); |
244 |
greg |
2.1 |
switch (dtype) { |
245 |
|
|
case DTascii: |
246 |
|
|
case DTfloat: |
247 |
|
|
case DTdouble: |
248 |
|
|
break; |
249 |
greg |
2.23 |
case DTrgbe: |
250 |
|
|
case DTxyze: |
251 |
greg |
2.25 |
cm = cm_load_rgbe(fp, nrows, ncols, scale); |
252 |
greg |
2.23 |
goto cleanup; |
253 |
greg |
2.1 |
default: |
254 |
|
|
error(USER, "unexpected data type in cm_load()"); |
255 |
|
|
} |
256 |
|
|
if (nrows <= 0) { /* don't know length? */ |
257 |
|
|
int guessrows = 147; /* usually big enough */ |
258 |
greg |
2.27 |
if (cm_elem_size[dtype] && (fp != stdin) & (inspec[0] != '!')) { |
259 |
greg |
2.1 |
long startpos = ftell(fp); |
260 |
|
|
if (fseek(fp, 0L, SEEK_END) == 0) { |
261 |
greg |
2.27 |
long rowsiz = (long)ncols*cm_elem_size[dtype]; |
262 |
greg |
2.1 |
long endpos = ftell(fp); |
263 |
|
|
|
264 |
greg |
2.27 |
if ((endpos - startpos) % rowsiz) { |
265 |
greg |
2.1 |
sprintf(errmsg, |
266 |
|
|
"improper length for binary file '%s'", |
267 |
greg |
2.9 |
inspec); |
268 |
greg |
2.1 |
error(USER, errmsg); |
269 |
|
|
} |
270 |
greg |
2.27 |
guessrows = (endpos - startpos)/rowsiz; |
271 |
greg |
2.1 |
if (fseek(fp, startpos, SEEK_SET) < 0) { |
272 |
|
|
sprintf(errmsg, |
273 |
|
|
"fseek() error on file '%s'", |
274 |
greg |
2.9 |
inspec); |
275 |
greg |
2.1 |
error(SYSTEM, errmsg); |
276 |
|
|
} |
277 |
|
|
nrows = guessrows; /* we're confident */ |
278 |
|
|
} |
279 |
|
|
} |
280 |
|
|
cm = cm_alloc(guessrows, ncols); |
281 |
|
|
} else |
282 |
|
|
cm = cm_alloc(nrows, ncols); |
283 |
greg |
2.21 |
if (!cm) /* XXX never happens */ |
284 |
greg |
2.1 |
return(NULL); |
285 |
|
|
if (dtype == DTascii) { /* read text file */ |
286 |
|
|
int maxrow = (nrows > 0 ? nrows : 32000); |
287 |
|
|
int r, c; |
288 |
|
|
for (r = 0; r < maxrow; r++) { |
289 |
|
|
if (r >= cm->nrows) /* need more space? */ |
290 |
greg |
2.15 |
cm = cm_resize(cm, cm->nrows+ROWINC); |
291 |
greg |
2.1 |
for (c = 0; c < ncols; c++) { |
292 |
|
|
COLORV *cv = cm_lval(cm,r,c); |
293 |
greg |
2.13 |
if (fscanf(fp, COLSPEC, cv, cv+1, cv+2) != 3) { |
294 |
greg |
2.1 |
if ((nrows <= 0) & (r > 0) & !c) { |
295 |
|
|
cm = cm_resize(cm, maxrow=r); |
296 |
|
|
break; |
297 |
|
|
} else |
298 |
|
|
goto EOFerror; |
299 |
greg |
2.13 |
} |
300 |
greg |
2.1 |
} |
301 |
|
|
} |
302 |
|
|
while ((c = getc(fp)) != EOF) |
303 |
|
|
if (!isspace(c)) { |
304 |
|
|
sprintf(errmsg, |
305 |
greg |
2.9 |
"unexpected data at end of ascii input '%s'", |
306 |
|
|
inspec); |
307 |
greg |
2.1 |
error(WARNING, errmsg); |
308 |
|
|
break; |
309 |
|
|
} |
310 |
|
|
} else { /* read binary file */ |
311 |
greg |
2.2 |
if (sizeof(COLOR) == cm_elem_size[dtype]) { |
312 |
greg |
2.1 |
int nread = 0; |
313 |
|
|
do { /* read all we can */ |
314 |
greg |
2.17 |
nread += getbinary(cm->cmem + 3*nread, |
315 |
greg |
2.4 |
sizeof(COLOR), |
316 |
greg |
2.1 |
cm->nrows*cm->ncols - nread, |
317 |
|
|
fp); |
318 |
|
|
if (nrows <= 0) { /* unknown length */ |
319 |
|
|
if (nread == cm->nrows*cm->ncols) |
320 |
|
|
/* need more space? */ |
321 |
greg |
2.15 |
cm = cm_resize(cm, cm->nrows+ROWINC); |
322 |
greg |
2.1 |
else if (nread && !(nread % cm->ncols)) |
323 |
|
|
/* seem to be done */ |
324 |
|
|
cm = cm_resize(cm, nread/cm->ncols); |
325 |
|
|
else /* ended mid-row */ |
326 |
|
|
goto EOFerror; |
327 |
|
|
} else if (nread < cm->nrows*cm->ncols) |
328 |
|
|
goto EOFerror; |
329 |
|
|
} while (nread < cm->nrows*cm->ncols); |
330 |
|
|
|
331 |
greg |
2.26 |
if (swap) { |
332 |
|
|
if (sizeof(COLORV) == 4) |
333 |
|
|
swap32((char *)cm->cmem, |
334 |
|
|
3*cm->nrows*cm->ncols); |
335 |
|
|
else /* sizeof(COLORV) == 8 */ |
336 |
|
|
swap64((char *)cm->cmem, |
337 |
|
|
3*cm->nrows*cm->ncols); |
338 |
|
|
} |
339 |
greg |
2.1 |
} else if (dtype == DTdouble) { |
340 |
|
|
double dc[3]; /* load from double */ |
341 |
|
|
COLORV *cvp = cm->cmem; |
342 |
|
|
int n = nrows*ncols; |
343 |
|
|
|
344 |
|
|
if (n <= 0) |
345 |
|
|
goto not_handled; |
346 |
|
|
while (n--) { |
347 |
greg |
2.17 |
if (getbinary(dc, sizeof(double), 3, fp) != 3) |
348 |
greg |
2.1 |
goto EOFerror; |
349 |
greg |
2.26 |
if (swap) swap64((char *)dc, 3); |
350 |
greg |
2.1 |
copycolor(cvp, dc); |
351 |
|
|
cvp += 3; |
352 |
|
|
} |
353 |
|
|
} else /* dtype == DTfloat */ { |
354 |
|
|
float fc[3]; /* load from float */ |
355 |
|
|
COLORV *cvp = cm->cmem; |
356 |
|
|
int n = nrows*ncols; |
357 |
|
|
|
358 |
|
|
if (n <= 0) |
359 |
|
|
goto not_handled; |
360 |
|
|
while (n--) { |
361 |
greg |
2.17 |
if (getbinary(fc, sizeof(float), 3, fp) != 3) |
362 |
greg |
2.1 |
goto EOFerror; |
363 |
greg |
2.26 |
if (swap) swap32((char *)fc, 3); |
364 |
greg |
2.1 |
copycolor(cvp, fc); |
365 |
|
|
cvp += 3; |
366 |
|
|
} |
367 |
|
|
} |
368 |
|
|
if (fgetc(fp) != EOF) { |
369 |
|
|
sprintf(errmsg, |
370 |
greg |
2.9 |
"unexpected data at end of binary input '%s'", |
371 |
|
|
inspec); |
372 |
greg |
2.1 |
error(WARNING, errmsg); |
373 |
|
|
} |
374 |
|
|
} |
375 |
greg |
2.23 |
cleanup: |
376 |
greg |
2.9 |
if (fp != stdin) { |
377 |
|
|
if (inspec[0] != '!') |
378 |
|
|
fclose(fp); |
379 |
|
|
else if (pclose(fp)) { |
380 |
|
|
sprintf(errmsg, "error running command '%s'", inspec); |
381 |
|
|
error(WARNING, errmsg); |
382 |
|
|
} |
383 |
|
|
} |
384 |
greg |
2.1 |
#ifdef getc_unlocked |
385 |
|
|
else |
386 |
|
|
funlockfile(fp); |
387 |
|
|
#endif |
388 |
|
|
return(cm); |
389 |
|
|
EOFerror: |
390 |
greg |
2.9 |
sprintf(errmsg, "unexpected EOF reading %s", inspec); |
391 |
greg |
2.1 |
error(USER, errmsg); |
392 |
greg |
2.23 |
return(NULL); |
393 |
greg |
2.1 |
not_handled: |
394 |
|
|
error(INTERNAL, "unhandled data size or length in cm_load()"); |
395 |
|
|
return(NULL); /* gratis return */ |
396 |
|
|
} |
397 |
|
|
|
398 |
|
|
/* Extract a column vector from a matrix */ |
399 |
|
|
CMATRIX * |
400 |
|
|
cm_column(const CMATRIX *cm, int c) |
401 |
|
|
{ |
402 |
|
|
CMATRIX *cvr; |
403 |
|
|
int dr; |
404 |
|
|
|
405 |
greg |
2.21 |
if (!cm) |
406 |
|
|
return(NULL); |
407 |
greg |
2.1 |
if ((c < 0) | (c >= cm->ncols)) |
408 |
|
|
error(INTERNAL, "column requested outside matrix"); |
409 |
|
|
cvr = cm_alloc(cm->nrows, 1); |
410 |
greg |
2.21 |
if (!cvr) |
411 |
greg |
2.1 |
return(NULL); |
412 |
|
|
for (dr = 0; dr < cm->nrows; dr++) { |
413 |
|
|
const COLORV *sp = cm_lval(cm,dr,c); |
414 |
|
|
COLORV *dp = cv_lval(cvr,dr); |
415 |
|
|
dp[0] = sp[0]; |
416 |
|
|
dp[1] = sp[1]; |
417 |
|
|
dp[2] = sp[2]; |
418 |
|
|
} |
419 |
|
|
return(cvr); |
420 |
|
|
} |
421 |
|
|
|
422 |
|
|
/* Multiply two matrices (or a matrix and a vector) and allocate the result */ |
423 |
|
|
CMATRIX * |
424 |
|
|
cm_multiply(const CMATRIX *cm1, const CMATRIX *cm2) |
425 |
|
|
{ |
426 |
|
|
char *rowcheck=NULL, *colcheck=NULL; |
427 |
|
|
CMATRIX *cmr; |
428 |
|
|
int dr, dc, i; |
429 |
|
|
|
430 |
greg |
2.21 |
if (!cm1 | !cm2) |
431 |
|
|
return(NULL); |
432 |
greg |
2.1 |
if ((cm1->ncols <= 0) | (cm1->ncols != cm2->nrows)) |
433 |
|
|
error(INTERNAL, "matrix dimension mismatch in cm_multiply()"); |
434 |
|
|
cmr = cm_alloc(cm1->nrows, cm2->ncols); |
435 |
greg |
2.21 |
if (!cmr) |
436 |
greg |
2.1 |
return(NULL); |
437 |
|
|
/* optimization: check for zero rows & cols */ |
438 |
|
|
if (((cm1->nrows > 5) | (cm2->ncols > 5)) & (cm1->ncols > 5)) { |
439 |
|
|
static const COLOR czero; |
440 |
|
|
rowcheck = (char *)calloc(cmr->nrows, 1); |
441 |
|
|
for (dr = cm1->nrows*(rowcheck != NULL); dr--; ) |
442 |
|
|
for (dc = cm1->ncols; dc--; ) |
443 |
|
|
if (memcmp(cm_lval(cm1,dr,dc), czero, sizeof(COLOR))) { |
444 |
|
|
rowcheck[dr] = 1; |
445 |
|
|
break; |
446 |
|
|
} |
447 |
|
|
colcheck = (char *)calloc(cmr->ncols, 1); |
448 |
|
|
for (dc = cm2->ncols*(colcheck != NULL); dc--; ) |
449 |
|
|
for (dr = cm2->nrows; dr--; ) |
450 |
|
|
if (memcmp(cm_lval(cm2,dr,dc), czero, sizeof(COLOR))) { |
451 |
|
|
colcheck[dc] = 1; |
452 |
|
|
break; |
453 |
|
|
} |
454 |
|
|
} |
455 |
|
|
for (dr = 0; dr < cmr->nrows; dr++) |
456 |
|
|
for (dc = 0; dc < cmr->ncols; dc++) { |
457 |
|
|
COLORV *dp = cm_lval(cmr,dr,dc); |
458 |
greg |
2.4 |
double res[3]; |
459 |
greg |
2.1 |
dp[0] = dp[1] = dp[2] = 0; |
460 |
greg |
2.21 |
if (rowcheck && !rowcheck[dr]) |
461 |
greg |
2.1 |
continue; |
462 |
greg |
2.21 |
if (colcheck && !colcheck[dc]) |
463 |
greg |
2.1 |
continue; |
464 |
greg |
2.4 |
res[0] = res[1] = res[2] = 0; |
465 |
greg |
2.1 |
for (i = 0; i < cm1->ncols; i++) { |
466 |
|
|
const COLORV *cp1 = cm_lval(cm1,dr,i); |
467 |
|
|
const COLORV *cp2 = cm_lval(cm2,i,dc); |
468 |
greg |
2.18 |
res[0] += (double)cp1[0] * cp2[0]; |
469 |
|
|
res[1] += (double)cp1[1] * cp2[1]; |
470 |
|
|
res[2] += (double)cp1[2] * cp2[2]; |
471 |
greg |
2.1 |
} |
472 |
greg |
2.4 |
copycolor(dp, res); |
473 |
greg |
2.1 |
} |
474 |
greg |
2.21 |
if (rowcheck) free(rowcheck); |
475 |
|
|
if (colcheck) free(colcheck); |
476 |
greg |
2.1 |
return(cmr); |
477 |
|
|
} |
478 |
|
|
|
479 |
greg |
2.2 |
/* write out matrix to file (precede by resolution string if picture) */ |
480 |
|
|
int |
481 |
|
|
cm_write(const CMATRIX *cm, int dtype, FILE *fp) |
482 |
greg |
2.1 |
{ |
483 |
greg |
2.3 |
static const char tabEOL[2] = {'\t','\n'}; |
484 |
greg |
2.21 |
const COLORV *mp; |
485 |
greg |
2.3 |
int r, c; |
486 |
greg |
2.2 |
|
487 |
greg |
2.21 |
if (!cm) |
488 |
|
|
return(0); |
489 |
|
|
mp = cm->cmem; |
490 |
greg |
2.2 |
switch (dtype) { |
491 |
|
|
case DTascii: |
492 |
greg |
2.3 |
for (r = 0; r < cm->nrows; r++) |
493 |
greg |
2.2 |
for (c = 0; c < cm->ncols; c++, mp += 3) |
494 |
greg |
2.3 |
fprintf(fp, "%.6e %.6e %.6e%c", |
495 |
|
|
mp[0], mp[1], mp[2], |
496 |
|
|
tabEOL[c >= cm->ncols-1]); |
497 |
greg |
2.2 |
break; |
498 |
|
|
case DTfloat: |
499 |
|
|
case DTdouble: |
500 |
|
|
if (sizeof(COLOR) == cm_elem_size[dtype]) { |
501 |
|
|
r = cm->ncols*cm->nrows; |
502 |
|
|
while (r > 0) { |
503 |
greg |
2.17 |
c = putbinary(mp, sizeof(COLOR), r, fp); |
504 |
greg |
2.2 |
if (c <= 0) |
505 |
|
|
return(0); |
506 |
|
|
mp += 3*c; |
507 |
|
|
r -= c; |
508 |
|
|
} |
509 |
|
|
} else if (dtype == DTdouble) { |
510 |
|
|
double dc[3]; |
511 |
|
|
r = cm->ncols*cm->nrows; |
512 |
|
|
while (r--) { |
513 |
|
|
copycolor(dc, mp); |
514 |
greg |
2.17 |
if (putbinary(dc, sizeof(double), 3, fp) != 3) |
515 |
greg |
2.2 |
return(0); |
516 |
|
|
mp += 3; |
517 |
|
|
} |
518 |
|
|
} else /* dtype == DTfloat */ { |
519 |
|
|
float fc[3]; |
520 |
|
|
r = cm->ncols*cm->nrows; |
521 |
|
|
while (r--) { |
522 |
|
|
copycolor(fc, mp); |
523 |
greg |
2.17 |
if (putbinary(fc, sizeof(float), 3, fp) != 3) |
524 |
greg |
2.2 |
return(0); |
525 |
|
|
mp += 3; |
526 |
|
|
} |
527 |
|
|
} |
528 |
|
|
break; |
529 |
|
|
case DTrgbe: |
530 |
|
|
case DTxyze: |
531 |
|
|
fprtresolu(cm->ncols, cm->nrows, fp); |
532 |
|
|
for (r = 0; r < cm->nrows; r++, mp += 3*cm->ncols) |
533 |
|
|
if (fwritescan((COLOR *)mp, cm->ncols, fp) < 0) |
534 |
|
|
return(0); |
535 |
|
|
break; |
536 |
|
|
default: |
537 |
|
|
fputs("Unsupported data type in cm_write()!\n", stderr); |
538 |
|
|
return(0); |
539 |
greg |
2.1 |
} |
540 |
greg |
2.2 |
return(fflush(fp) == 0); |
541 |
greg |
2.1 |
} |