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/* Copyright (c) 1994 Regents of the University of California */ |
2 |
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|
1 |
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#ifndef lint |
2 |
< |
static char SCCSid[] = "$SunId$ LBL"; |
2 |
> |
static const char RCSid[] = "$Id$"; |
3 |
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#endif |
6 |
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|
4 |
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/* |
5 |
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* Convert from Radiance picture file to Compuserve GIF. |
6 |
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* Currently, we don't know how to get back. |
7 |
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*/ |
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|
9 |
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#include <stdio.h> |
10 |
+ |
#include <time.h> |
11 |
+ |
#include <math.h> |
12 |
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|
13 |
+ |
#include "platform.h" |
14 |
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#include "color.h" |
15 |
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|
15 |
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#include "resolu.h" |
16 |
+ |
#include "clrtab.h" |
17 |
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|
18 |
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#ifdef MSDOS |
19 |
– |
#include <fcntl.h> |
20 |
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#endif |
21 |
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|
22 |
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#include <math.h> |
23 |
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|
18 |
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#define MAXCOLORS 256 |
19 |
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|
20 |
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int rmap[MAXCOLORS]; |
22 |
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int bmap[MAXCOLORS]; |
23 |
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|
24 |
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int currow; |
31 |
– |
|
32 |
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extern long ftell(); |
33 |
– |
|
25 |
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long picstart; |
26 |
+ |
BYTE clrtab[256][3]; |
27 |
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|
28 |
< |
extern BYTE clrtab[][3]; |
28 |
> |
extern int samplefac; |
29 |
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|
38 |
– |
extern int getgifpix(); |
30 |
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|
31 |
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COLR *scanln; |
32 |
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BYTE *pixscan; |
33 |
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|
34 |
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int xmax, ymax; /* picture size */ |
44 |
– |
|
35 |
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double gamv = 2.2; /* gamma correction */ |
46 |
– |
|
36 |
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int greyscale = 0; /* convert to B&W? */ |
48 |
– |
|
37 |
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int dither = 1; /* dither colors? */ |
50 |
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|
38 |
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int bradj = 0; /* brightness adjustment */ |
39 |
+ |
int ncolors = 0; /* number of colors requested */ |
40 |
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|
41 |
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char *progname; |
42 |
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|
43 |
+ |
typedef int ifun_t(int x, int y); /* required by the GIF code below */ |
44 |
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|
45 |
< |
main(argc, argv) |
46 |
< |
int argc; |
47 |
< |
char *argv[]; |
45 |
> |
static void getrow(int y); |
46 |
> |
static void mkclrmap(int nc); |
47 |
> |
static void mkgrymap(int nc); |
48 |
> |
static ifun_t getgifpix; |
49 |
> |
|
50 |
> |
static void GIFEncode(FILE *fp, int GWidth, int GHeight, int GInterlace, |
51 |
> |
int Background, int BitsPerPixel, int Red[], int Green[], int Blue[], |
52 |
> |
ifun_t* GetPixel); |
53 |
> |
|
54 |
> |
|
55 |
> |
int |
56 |
> |
main(int argc, char *argv[]) |
57 |
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{ |
60 |
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int ncolors = 0; |
58 |
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int bitsperpix; |
59 |
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int i; |
60 |
< |
#ifdef MSDOS |
61 |
< |
extern int _fmode; |
62 |
< |
_fmode = O_BINARY; |
66 |
< |
setmode(fileno(stdin), O_BINARY); |
67 |
< |
setmode(fileno(stdout), O_BINARY); |
68 |
< |
#endif |
60 |
> |
SET_DEFAULT_BINARY(); |
61 |
> |
SET_FILE_BINARY(stdin); |
62 |
> |
SET_FILE_BINARY(stdout); |
63 |
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progname = argv[0]; |
64 |
+ |
samplefac = 0; |
65 |
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|
66 |
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for (i = 1; i < argc; i++) |
67 |
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if (argv[i][0] == '-') |
83 |
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goto userr; |
84 |
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bradj = atoi(argv[++i]); |
85 |
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break; |
86 |
+ |
case 'n': |
87 |
+ |
samplefac = atoi(argv[++i]); |
88 |
+ |
break; |
89 |
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default: |
90 |
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goto userr; |
91 |
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} |
119 |
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/* set up gamma correction */ |
120 |
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setcolrgam(gamv); |
121 |
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/* figure out the bits per pixel */ |
122 |
< |
if (ncolors < 2 | ncolors > MAXCOLORS) |
122 |
> |
if ((ncolors < 2) | (ncolors > MAXCOLORS)) |
123 |
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ncolors = MAXCOLORS; |
124 |
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for (bitsperpix = 1; ncolors > 1<<bitsperpix; bitsperpix++) |
125 |
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; |
134 |
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exit(0); |
135 |
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userr: |
136 |
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fprintf(stderr, |
137 |
< |
"Usage: %s [-b][-c ncolors][-g gamv][-e +/-stops] input [output]\n", |
137 |
> |
"Usage: %s [-b][-d][-n samp][-c ncolors][-g gamv][-e +/-stops] input [output]\n", |
138 |
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progname); |
139 |
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exit(1); |
140 |
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} |
141 |
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|
142 |
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|
143 |
< |
getrow(y) /* get the specified row from our image */ |
144 |
< |
int y; |
143 |
> |
static void |
144 |
> |
getrow( /* get the specified row from our image */ |
145 |
> |
int y |
146 |
> |
) |
147 |
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{ |
148 |
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if (y == currow) |
149 |
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return; |
161 |
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if (bradj) |
162 |
|
shiftcolrs(scanln, xmax, bradj); |
163 |
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colrs_gambs(scanln, xmax); |
164 |
< |
if (pixscan != NULL) |
165 |
< |
dith_colrs(pixscan, scanln, xmax); |
164 |
> |
if (pixscan != NULL) { |
165 |
> |
if (samplefac) |
166 |
> |
neu_dith_colrs(pixscan, scanln, xmax); |
167 |
> |
else |
168 |
> |
dith_colrs(pixscan, scanln, xmax); |
169 |
> |
} |
170 |
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} |
171 |
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|
172 |
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|
173 |
< |
mkclrmap(nc) /* make our color map */ |
174 |
< |
int nc; |
173 |
> |
static void |
174 |
> |
mkclrmap( /* make our color map */ |
175 |
> |
int nc |
176 |
> |
) |
177 |
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{ |
178 |
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register int i; |
179 |
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|
180 |
< |
new_histo(); |
180 |
> |
if ((samplefac ? neu_init(xmax*ymax) : new_histo(xmax*ymax)) == -1) |
181 |
> |
goto memerr; |
182 |
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for (i = 0; i < ymax; i++) { |
183 |
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getrow(i); |
184 |
< |
cnt_colrs(scanln, xmax); |
184 |
> |
if (samplefac) |
185 |
> |
neu_colrs(scanln, xmax); |
186 |
> |
else |
187 |
> |
cnt_colrs(scanln, xmax); |
188 |
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} |
189 |
< |
new_clrtab(nc); |
189 |
> |
if (samplefac) |
190 |
> |
neu_clrtab(nc); |
191 |
> |
else |
192 |
> |
new_clrtab(nc); |
193 |
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for (i = 0; i < nc; i++) { |
194 |
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rmap[i] = clrtab[i][RED]; |
195 |
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gmap[i] = clrtab[i][GRN]; |
196 |
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bmap[i] = clrtab[i][BLU]; |
197 |
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} |
198 |
< |
if (dither && (pixscan = (BYTE *)malloc(xmax)) == NULL) { |
199 |
< |
fprintf(stderr, "%s: out of memory\n", progname); |
200 |
< |
exit(1); |
201 |
< |
} |
198 |
> |
if (dither && (pixscan = (BYTE *)malloc(xmax)) == NULL) |
199 |
> |
goto memerr; |
200 |
> |
return; |
201 |
> |
memerr: |
202 |
> |
fprintf(stderr, "%s: out of memory\n", progname); |
203 |
> |
exit(1); |
204 |
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} |
205 |
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|
206 |
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|
207 |
< |
mkgrymap(nc) |
208 |
< |
int nc; |
207 |
> |
static void |
208 |
> |
mkgrymap( |
209 |
> |
int nc |
210 |
> |
) |
211 |
|
{ |
212 |
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register int i; |
213 |
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|
219 |
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} |
220 |
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|
221 |
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|
222 |
< |
int |
223 |
< |
getgifpix(x, y) /* get a single pixel from our picture */ |
224 |
< |
int x, y; |
222 |
> |
static int |
223 |
> |
getgifpix( /* get a single pixel from our picture */ |
224 |
> |
int x, |
225 |
> |
int y |
226 |
> |
) |
227 |
|
{ |
209 |
– |
int pix; |
210 |
– |
|
228 |
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getrow(y); |
229 |
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if (greyscale) |
230 |
< |
return(normbright(scanln[x])); |
230 |
> |
return((normbright(scanln[x])*ncolors)>>8); |
231 |
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if (pixscan != NULL) |
232 |
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return(pixscan[x]); |
233 |
< |
return(map_pixel(scanln[x])); |
233 |
> |
return(samplefac ? neu_map_pixel(scanln[x]) : map_pixel(scanln[x])); |
234 |
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} |
235 |
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|
236 |
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|
238 |
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* SCARY GIF code follows . . . . sorry. |
239 |
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* |
240 |
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* Based on GIFENCOD by David Rowley <[email protected]>.A |
241 |
< |
* Lempel-Zim compression based on "compress". |
241 |
> |
* Lempel-Ziv compression based on "compress". |
242 |
|
* |
243 |
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*/ |
244 |
|
|
250 |
|
* BitsPerPixel, Red, Green, Blue, GetPixel ) |
251 |
|
* |
252 |
|
*****************************************************************************/ |
236 |
– |
typedef int (* ifunptr)(); |
253 |
|
|
254 |
|
#define TRUE 1 |
255 |
|
#define FALSE 0 |
262 |
|
unsigned long cur_accum = 0; |
263 |
|
int cur_bits = 0; |
264 |
|
|
265 |
+ |
static void BumpPixel(void); |
266 |
+ |
static int GIFNextPixel(ifun_t* getpixel); |
267 |
+ |
static void Putword(int w, FILE *fp); |
268 |
+ |
static void compress(int init_bits, FILE *outfile, ifun_t* ReadValue); |
269 |
+ |
|
270 |
+ |
|
271 |
+ |
/* a code_int must be able to hold 2**CBITS values of type int, and also -1 */ |
272 |
+ |
typedef int code_int; |
273 |
+ |
typedef long int count_int; |
274 |
+ |
typedef unsigned char char_type; |
275 |
+ |
|
276 |
+ |
static void output(code_int code); |
277 |
+ |
static void cl_block(void); |
278 |
+ |
static void cl_hash(count_int hsize); |
279 |
+ |
static void writeerr(void); |
280 |
+ |
|
281 |
+ |
static void char_init(void); |
282 |
+ |
static void char_out(int c); |
283 |
+ |
static void flush_char(void); |
284 |
+ |
static void gammawarp(short *sbuf, float gam, int n); |
285 |
+ |
|
286 |
+ |
|
287 |
|
/* |
288 |
|
* Bump the 'curx' and 'cury' to point to the next pixel |
289 |
|
*/ |
290 |
< |
BumpPixel() |
290 |
> |
static void |
291 |
> |
BumpPixel(void) |
292 |
|
{ |
293 |
|
curx++; |
294 |
|
if( curx == Width ) { |
329 |
|
/* |
330 |
|
* Return the next pixel from the image |
331 |
|
*/ |
332 |
< |
GIFNextPixel( getpixel ) |
333 |
< |
ifunptr getpixel; |
332 |
> |
static int |
333 |
> |
GIFNextPixel( |
334 |
> |
ifun_t* getpixel |
335 |
> |
) |
336 |
|
{ |
337 |
|
int r; |
338 |
|
|
347 |
|
/* |
348 |
|
* public GIFEncode |
349 |
|
*/ |
350 |
< |
GIFEncode( fp, GWidth, GHeight, GInterlace, Background, |
351 |
< |
BitsPerPixel, Red, Green, Blue, GetPixel ) |
352 |
< |
FILE *fp; |
353 |
< |
int GWidth, GHeight; |
354 |
< |
int GInterlace; |
355 |
< |
int Background; |
356 |
< |
int BitsPerPixel; |
357 |
< |
int Red[], Green[], Blue[]; |
358 |
< |
ifunptr GetPixel; |
350 |
> |
static void |
351 |
> |
GIFEncode( |
352 |
> |
FILE *fp, |
353 |
> |
int GWidth, |
354 |
> |
int GHeight, |
355 |
> |
int GInterlace, |
356 |
> |
int Background, |
357 |
> |
int BitsPerPixel, |
358 |
> |
int Red[], |
359 |
> |
int Green[], |
360 |
> |
int Blue[], |
361 |
> |
ifun_t* GetPixel |
362 |
> |
) |
363 |
|
{ |
364 |
|
int B; |
365 |
|
int RWidth, RHeight; |
369 |
|
int InitCodeSize; |
370 |
|
int i; |
371 |
|
|
372 |
< |
long cur_accum = 0; |
372 |
> |
cur_accum = 0; /* globals */ |
373 |
|
cur_bits = 0; |
374 |
|
|
375 |
|
Interlace = GInterlace; |
419 |
|
/* |
420 |
|
* Write out a word to the GIF file |
421 |
|
*/ |
422 |
< |
Putword( w, fp ) |
423 |
< |
int w; |
424 |
< |
FILE *fp; |
422 |
> |
static void |
423 |
> |
Putword( |
424 |
> |
int w, |
425 |
> |
FILE *fp |
426 |
> |
) |
427 |
|
{ |
428 |
|
fputc( w & 0xff, fp ); |
429 |
|
fputc( (w/256) & 0xff, fp ); |
443 |
|
#define HSIZE 5003 /* 80% occupancy */ |
444 |
|
|
445 |
|
/* |
399 |
– |
* a code_int must be able to hold 2**CBITS values of type int, and also -1 |
400 |
– |
*/ |
401 |
– |
typedef int code_int; |
402 |
– |
typedef long int count_int; |
403 |
– |
typedef unsigned char char_type; |
404 |
– |
|
405 |
– |
/* |
446 |
|
* |
447 |
|
* GIF Image compression - modified 'compress' |
448 |
|
* |
517 |
|
int ClearCode; |
518 |
|
int EOFCode; |
519 |
|
|
520 |
< |
compress( init_bits, outfile, ReadValue ) |
521 |
< |
int init_bits; |
522 |
< |
FILE *outfile; |
523 |
< |
ifunptr ReadValue; |
520 |
> |
static void |
521 |
> |
compress( |
522 |
> |
int init_bits, |
523 |
> |
FILE *outfile, |
524 |
> |
ifun_t* ReadValue |
525 |
> |
) |
526 |
|
{ |
527 |
|
register long fcode; |
528 |
|
register code_int i = 0; |
561 |
|
while ( (c = GIFNextPixel( ReadValue )) != EOF ) { |
562 |
|
in_count++; |
563 |
|
fcode = (long) (((long) c << maxbits) + ent); |
564 |
< |
/* i = (((code_int)c << hshift) ~ ent); /* xor hashing */ |
564 |
> |
/* i = (((code_int)c << hshift) ~ ent); */ /* xor hashing */ |
565 |
|
i = (((code_int)c << hshift) ^ ent); /* xor hashing */ |
566 |
|
if ( HashTabOf (i) == fcode ) { |
567 |
|
ent = CodeTabOf (i); |
621 |
|
0x01FF, 0x03FF, 0x07FF, 0x0FFF, |
622 |
|
0x1FFF, 0x3FFF, 0x7FFF, 0xFFFF }; |
623 |
|
|
624 |
< |
output( code ) |
625 |
< |
code_int code; |
624 |
> |
static void |
625 |
> |
output( |
626 |
> |
code_int code |
627 |
> |
) |
628 |
|
{ |
629 |
|
cur_accum &= masks[ cur_bits ]; |
630 |
|
if( cur_bits > 0 ) |
673 |
|
/* |
674 |
|
* Clear out the hash table |
675 |
|
*/ |
676 |
< |
cl_block () /* table clear for block compress */ |
676 |
> |
static void |
677 |
> |
cl_block (void) /* table clear for block compress */ |
678 |
|
{ |
679 |
|
cl_hash ( (count_int) hsize ); |
680 |
|
free_ent = ClearCode + 2; |
682 |
|
output( (code_int)ClearCode ); |
683 |
|
} |
684 |
|
|
685 |
< |
cl_hash(hsize) /* reset code table */ |
686 |
< |
register count_int hsize; |
685 |
> |
static void |
686 |
> |
cl_hash( /* reset code table */ |
687 |
> |
register count_int hsize |
688 |
> |
) |
689 |
|
{ |
690 |
|
register count_int *htab_p = htab+hsize; |
691 |
|
register long i; |
715 |
|
*--htab_p = m1; |
716 |
|
} |
717 |
|
|
718 |
< |
writeerr() |
718 |
> |
static void |
719 |
> |
writeerr(void) |
720 |
|
{ |
721 |
|
printf( "error writing output file\n" ); |
722 |
|
exit(1); |
736 |
|
/* |
737 |
|
* Set up the 'byte output' routine |
738 |
|
*/ |
739 |
< |
char_init() |
739 |
> |
static void |
740 |
> |
char_init(void) |
741 |
|
{ |
742 |
|
a_count = 0; |
743 |
|
} |
751 |
|
* Add a character to the end of the current packet, and if it is 254 |
752 |
|
* characters, flush the packet to disk. |
753 |
|
*/ |
754 |
< |
char_out( c ) |
755 |
< |
int c; |
754 |
> |
static void |
755 |
> |
char_out( |
756 |
> |
int c |
757 |
> |
) |
758 |
|
{ |
759 |
|
accum[ a_count++ ] = c; |
760 |
|
if( a_count >= 254 ) |
764 |
|
/* |
765 |
|
* Flush the packet to disk, and reset the accumulator |
766 |
|
*/ |
767 |
< |
flush_char() |
767 |
> |
static void |
768 |
> |
flush_char(void) |
769 |
|
{ |
770 |
|
if( a_count > 0 ) { |
771 |
|
fputc( a_count, g_outfile ); |
777 |
|
static float curgamma; |
778 |
|
static short gamtab[256]; |
779 |
|
|
780 |
< |
gammawarp(sbuf,gam,n) |
781 |
< |
short *sbuf; |
782 |
< |
float gam; |
783 |
< |
int n; |
780 |
> |
static void |
781 |
> |
gammawarp( |
782 |
> |
short *sbuf, |
783 |
> |
float gam, |
784 |
> |
int n |
785 |
> |
) |
786 |
|
{ |
787 |
|
int i; |
734 |
– |
float f; |
788 |
|
|
789 |
|
if(gam!=curgamma) { |
790 |
|
for(i=0; i<256; i++) |