1 |
/* Copyright (c) 1987 Regents of the University of California */ |
2 |
|
3 |
#ifndef lint |
4 |
static char SCCSid[] = "$SunId$ LBL"; |
5 |
#endif |
6 |
|
7 |
/* |
8 |
* ximage.c - driver for X-windows |
9 |
* |
10 |
* 4/30/87 |
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* 3/3/88 Added calls to xraster & Paul Heckbert's ciq routines |
12 |
*/ |
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|
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#include "standard.h" |
15 |
|
16 |
#include <X/Xlib.h> |
17 |
#include <X/cursors/bcross.cursor> |
18 |
#include <X/cursors/bcross_mask.cursor> |
19 |
|
20 |
#include <sys/types.h> |
21 |
|
22 |
#include <ctype.h> |
23 |
|
24 |
#include "color.h" |
25 |
|
26 |
#include "xraster.h" |
27 |
|
28 |
#include "view.h" |
29 |
|
30 |
#include "pic.h" |
31 |
|
32 |
#include "random.h" |
33 |
|
34 |
#define controlshift(e) (((XButtonEvent *)(e))->detail & (ShiftMask|ControlMask)) |
35 |
|
36 |
#define FONTNAME "9x15" /* text font we'll use */ |
37 |
|
38 |
#define CTRL(c) ('c'-'@') |
39 |
|
40 |
#define BORWIDTH 5 /* border width */ |
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#define BARHEIGHT 25 /* menu bar size */ |
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|
43 |
double gamcor = 2.2; /* gamma correction */ |
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|
45 |
XRASTER *ourras = NULL; /* our stored raster image */ |
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|
47 |
int dither = 1; /* dither colors? */ |
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int fast = 0; /* keep picture in Pixmap? */ |
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|
50 |
Window wind = 0; /* our output window */ |
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Font fontid; /* our font */ |
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|
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int maxcolors = 0; /* maximum colors */ |
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int greyscale = 0; /* in grey */ |
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|
56 |
int scale = 0; /* scalefactor; power of two */ |
57 |
|
58 |
int xoff = 0; /* x image offset */ |
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int yoff = 0; /* y image offset */ |
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|
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VIEW ourview = STDVIEW; /* image view parameters */ |
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int gotview = 0; /* got parameters from file */ |
63 |
|
64 |
COLR *scanline; /* scan line buffer */ |
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|
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int xmax, ymax; /* picture resolution */ |
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int width, height; /* window size */ |
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char *fname = NULL; /* input file name */ |
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FILE *fin = stdin; /* input file */ |
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long *scanpos = NULL; /* scan line positions in file */ |
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int cury = 0; /* current scan location */ |
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|
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double exposure = 1.0; /* exposure compensation used */ |
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|
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int wrongformat = 0; /* input in another format */ |
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|
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struct { |
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int xmin, ymin, xsiz, ysiz; |
79 |
} box = {0, 0, 0, 0}; /* current box */ |
80 |
|
81 |
char *geometry = NULL; /* geometry specification */ |
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|
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char *progname; |
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|
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char errmsg[128]; |
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|
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extern long ftell(); |
88 |
|
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extern char *malloc(), *calloc(); |
90 |
|
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extern double atof(), pow(), log(); |
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|
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|
94 |
main(argc, argv) |
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int argc; |
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char *argv[]; |
97 |
{ |
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int headline(); |
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int i; |
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|
101 |
progname = argv[0]; |
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|
103 |
for (i = 1; i < argc; i++) |
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if (argv[i][0] == '-') |
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switch (argv[i][1]) { |
106 |
case 'c': |
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maxcolors = atoi(argv[++i]); |
108 |
break; |
109 |
case 'b': |
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greyscale = !greyscale; |
111 |
break; |
112 |
case 'm': |
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maxcolors = 2; |
114 |
break; |
115 |
case 'd': |
116 |
dither = !dither; |
117 |
break; |
118 |
case 'f': |
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fast = !fast; |
120 |
break; |
121 |
case 'e': |
122 |
if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
123 |
goto userr; |
124 |
scale = atoi(argv[++i]); |
125 |
break; |
126 |
case 'g': |
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gamcor = atof(argv[++i]); |
128 |
break; |
129 |
default: |
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goto userr; |
131 |
} |
132 |
else if (argv[i][0] == '=') |
133 |
geometry = argv[i]; |
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else |
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break; |
136 |
|
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if (argc-i == 1) { |
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fname = argv[i]; |
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fin = fopen(fname, "r"); |
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if (fin == NULL) { |
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sprintf(errmsg, "can't open file \"%s\"", fname); |
142 |
quiterr(errmsg); |
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} |
144 |
} |
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/* get header */ |
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getheader(fin, headline, NULL); |
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/* get picture dimensions */ |
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if (wrongformat || fgetresolu(&xmax, &ymax, fin) != (YMAJOR|YDECR)) |
149 |
quiterr("bad picture size"); |
150 |
/* set view parameters */ |
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if (gotview && setview(&ourview) != NULL) |
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gotview = 0; |
153 |
if ((scanline = (COLR *)malloc(xmax*sizeof(COLR))) == NULL) |
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quiterr("out of memory"); |
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|
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init(); /* get file and open window */ |
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|
158 |
for ( ; ; ) |
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getevent(); /* main loop */ |
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userr: |
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fprintf(stderr, |
162 |
"Usage: %s [=geometry][-b][-m][-d][-f][-c ncolors][-e +/-stops] file\n", |
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progname); |
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quit(1); |
165 |
} |
166 |
|
167 |
|
168 |
headline(s) /* get relevant info from header */ |
169 |
char *s; |
170 |
{ |
171 |
static char *altname[] = {"rview","rpict",VIEWSTR,NULL}; |
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register char **an; |
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char fmt[32]; |
174 |
|
175 |
if (isexpos(s)) |
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exposure *= exposval(s); |
177 |
else if (isformat(s)) { |
178 |
formatval(fmt, s); |
179 |
wrongformat = strcmp(fmt, COLRFMT); |
180 |
} else |
181 |
for (an = altname; *an != NULL; an++) |
182 |
if (!strncmp(*an, s, strlen(*an))) { |
183 |
if (sscanview(&ourview, s+strlen(*an)) > 0) |
184 |
gotview++; |
185 |
return; |
186 |
} |
187 |
} |
188 |
|
189 |
|
190 |
init() /* get data and open window */ |
191 |
{ |
192 |
register int i; |
193 |
OpaqueFrame mainframe; |
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char defgeom[32]; |
195 |
|
196 |
if (fname != NULL) { |
197 |
scanpos = (long *)malloc(ymax*sizeof(long)); |
198 |
if (scanpos == NULL) |
199 |
goto memerr; |
200 |
for (i = 0; i < ymax; i++) |
201 |
scanpos[i] = -1; |
202 |
} |
203 |
if (XOpenDisplay(NULL) == NULL) |
204 |
quiterr("can't open display; DISPLAY variable set?"); |
205 |
#ifdef notdef |
206 |
if (DisplayWidth() - 2*BORWIDTH < xmax || |
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DisplayHeight() - 2*BORWIDTH - BARHEIGHT < ymax) |
208 |
quiterr("resolution mismatch"); |
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#endif |
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if (maxcolors == 0) { /* get number of available colors */ |
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maxcolors = 1<<DisplayPlanes(); |
212 |
if (maxcolors > 4) maxcolors -= 2; |
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} |
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/* store image */ |
215 |
getras(); |
216 |
|
217 |
mainframe.bdrwidth = BORWIDTH; |
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mainframe.border = WhitePixmap; |
219 |
mainframe.background = BlackPixmap; |
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sprintf(defgeom, "=%dx%d+0+22", xmax, ymax); |
221 |
wind = XCreate("Radiance Image", progname, geometry, defgeom, |
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&mainframe, 16, 16); |
223 |
if (wind == 0) |
224 |
quiterr("can't create window"); |
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width = mainframe.width; |
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height = mainframe.height; |
227 |
fontid = XGetFont(FONTNAME); |
228 |
if (fontid == 0) |
229 |
quiterr("can't get font"); |
230 |
XStoreName(wind, fname == NULL ? progname : fname); |
231 |
XDefineCursor(wind, XCreateCursor(bcross_width, bcross_height, |
232 |
bcross_bits, bcross_mask_bits, |
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bcross_x_hot, bcross_y_hot, |
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BlackPixel, WhitePixel, GXcopy)); |
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XSelectInput(wind, ButtonPressed|ButtonReleased|UnmapWindow |
236 |
|RightDownMotion|MiddleDownMotion|LeftDownMotion |
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|KeyPressed|ExposeWindow|ExposeRegion); |
238 |
XMapWindow(wind); |
239 |
return; |
240 |
memerr: |
241 |
quiterr("out of memory"); |
242 |
} |
243 |
|
244 |
|
245 |
quiterr(err) /* print message and exit */ |
246 |
char *err; |
247 |
{ |
248 |
if (err != NULL) |
249 |
fprintf(stderr, "%s: %s\n", progname, err); |
250 |
|
251 |
exit(err == NULL ? 0 : 1); |
252 |
} |
253 |
|
254 |
|
255 |
eputs(s) |
256 |
char *s; |
257 |
{ |
258 |
fputs(s, stderr); |
259 |
} |
260 |
|
261 |
|
262 |
quit(code) |
263 |
int code; |
264 |
{ |
265 |
exit(code); |
266 |
} |
267 |
|
268 |
|
269 |
getras() /* get raster file */ |
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{ |
271 |
colormap ourmap; |
272 |
|
273 |
ourras = (XRASTER *)calloc(1, sizeof(XRASTER)); |
274 |
if (ourras == NULL) |
275 |
goto memerr; |
276 |
ourras->width = xmax; |
277 |
ourras->height = ymax; |
278 |
if (maxcolors <= 2) { /* monochrome */ |
279 |
ourras->data.m = (unsigned short *)malloc(BitmapSize(xmax,ymax)); |
280 |
if (ourras->data.m == NULL) |
281 |
goto memerr; |
282 |
getmono(); |
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} else { |
284 |
ourras->data.bz = (unsigned char *)malloc(BZPixmapSize(xmax,ymax)); |
285 |
if (ourras->data.bz == NULL) |
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goto memerr; |
287 |
if (greyscale) |
288 |
biq(dither,maxcolors,1,ourmap); |
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else |
290 |
ciq(dither,maxcolors,1,ourmap); |
291 |
if (init_rcolors(ourras, ourmap) == 0) |
292 |
goto memerr; |
293 |
} |
294 |
return; |
295 |
memerr: |
296 |
quiterr("out of memory"); |
297 |
} |
298 |
|
299 |
|
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getevent() /* process the next event */ |
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{ |
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WindowInfo info; |
303 |
XEvent e; |
304 |
|
305 |
XNextEvent(&e); |
306 |
switch (e.type) { |
307 |
case KeyPressed: |
308 |
docom(&e); |
309 |
break; |
310 |
case ExposeWindow: |
311 |
XQueryWindow(wind, &info); /* in case resized */ |
312 |
width = info.width; |
313 |
height = info.height; |
314 |
/* fall through */ |
315 |
case ExposeRegion: |
316 |
fixwindow(&e); |
317 |
break; |
318 |
case UnmapWindow: |
319 |
unmap_rcolors(ourras); |
320 |
break; |
321 |
case ButtonPressed: |
322 |
if (controlshift(&e)) |
323 |
moveimage(&e); |
324 |
else |
325 |
getbox(&e); |
326 |
break; |
327 |
} |
328 |
} |
329 |
|
330 |
|
331 |
fixwindow(eexp) /* fix new or stepped-on window */ |
332 |
XExposeEvent *eexp; |
333 |
{ |
334 |
redraw(eexp->x, eexp->y, eexp->width, eexp->height); |
335 |
} |
336 |
|
337 |
|
338 |
redraw(x, y, w, h) /* redraw section of window */ |
339 |
int x, y; |
340 |
int w, h; |
341 |
{ |
342 |
if (ourras->ncolors && map_rcolors(ourras) == NULL) { |
343 |
fprintf(stderr, "%s: cannot allocate colors\n", progname); |
344 |
return(-1); |
345 |
} |
346 |
if (fast) |
347 |
make_rpixmap(ourras); |
348 |
return(patch_raster(wind,x-xoff,y-yoff,x,y,w,h,ourras) ? 0 : -1); |
349 |
} |
350 |
|
351 |
|
352 |
docom(ekey) /* execute command */ |
353 |
XKeyEvent *ekey; |
354 |
{ |
355 |
char buf[80]; |
356 |
COLOR cval; |
357 |
Color cvx; |
358 |
char *cp; |
359 |
int n; |
360 |
double comp; |
361 |
FVECT rorg, rdir; |
362 |
|
363 |
cp = XLookupMapping(ekey, &n); |
364 |
if (n == 0) |
365 |
return(0); |
366 |
switch (*cp) { /* interpret command */ |
367 |
case 'q': |
368 |
case CTRL(D): /* quit */ |
369 |
quit(0); |
370 |
case '\n': |
371 |
case '\r': |
372 |
case 'l': |
373 |
case 'c': /* value */ |
374 |
if (avgbox(cval) == -1) |
375 |
return(-1); |
376 |
switch (*cp) { |
377 |
case '\n': |
378 |
case '\r': /* radiance */ |
379 |
sprintf(buf, "%.3f", intens(cval)/exposure); |
380 |
break; |
381 |
case 'l': /* luminance */ |
382 |
sprintf(buf, "%.0fL", luminance(cval)/exposure); |
383 |
break; |
384 |
case 'c': /* color */ |
385 |
comp = pow(2.0, (double)scale); |
386 |
sprintf(buf, "(%.2f,%.2f,%.2f)", |
387 |
colval(cval,RED)*comp, |
388 |
colval(cval,GRN)*comp, |
389 |
colval(cval,BLU)*comp); |
390 |
break; |
391 |
} |
392 |
XText(wind, box.xmin, box.ymin, buf, strlen(buf), |
393 |
fontid, BlackPixel, WhitePixel); |
394 |
return(0); |
395 |
case 'i': /* identify (contour) */ |
396 |
if (ourras->pixels == NULL) |
397 |
return(-1); |
398 |
n = ourras->data.bz[ekey->x-xoff+BZPixmapSize(xmax,ekey->y-yoff)]; |
399 |
n = ourras->pmap[n]; |
400 |
cvx.pixel = ourras->cdefs[n].pixel; |
401 |
cvx.red = random() & 65535; |
402 |
cvx.green = random() & 65535; |
403 |
cvx.blue = random() & 65535; |
404 |
XStoreColor(&cvx); |
405 |
return(0); |
406 |
case 'p': /* position */ |
407 |
sprintf(buf, "(%d,%d)", ekey->x-xoff, ymax-1-ekey->y+yoff); |
408 |
XText(wind, ekey->x, ekey->y, buf, strlen(buf), |
409 |
fontid, BlackPixel, WhitePixel); |
410 |
return(0); |
411 |
case 't': /* trace */ |
412 |
if (!gotview) { |
413 |
XFeep(0); |
414 |
return(-1); |
415 |
} |
416 |
if (viewray(rorg, rdir, &ourview, (ekey->x-xoff+.5)/xmax, |
417 |
(ymax-1-ekey->y+yoff+.5)/ymax) < 0) |
418 |
return(-1); |
419 |
printf("%e %e %e ", rorg[0], rorg[1], rorg[2]); |
420 |
printf("%e %e %e\n", rdir[0], rdir[1], rdir[2]); |
421 |
fflush(stdout); |
422 |
return(0); |
423 |
case '=': /* adjust exposure */ |
424 |
if (avgbox(cval) == -1) |
425 |
return(-1); |
426 |
n = log(.5/bright(cval))/.69315 - scale; /* truncate */ |
427 |
if (n == 0) |
428 |
return(0); |
429 |
scale_rcolors(ourras, pow(2.0, (double)n)); |
430 |
scale += n; |
431 |
sprintf(buf, "%+d", scale); |
432 |
XText(wind, box.xmin, box.ymin, buf, strlen(buf), |
433 |
fontid, BlackPixel, WhitePixel); |
434 |
XFlush(); |
435 |
free_raster(ourras); |
436 |
getras(); |
437 |
/* fall through */ |
438 |
case CTRL(R): /* redraw */ |
439 |
case CTRL(L): |
440 |
unmap_rcolors(ourras); |
441 |
XClear(wind); |
442 |
return(redraw(0, 0, width, height)); |
443 |
case ' ': /* clear */ |
444 |
return(redraw(box.xmin, box.ymin, box.xsiz, box.ysiz)); |
445 |
default: |
446 |
XFeep(0); |
447 |
return(-1); |
448 |
} |
449 |
} |
450 |
|
451 |
|
452 |
moveimage(ep) /* shift the image */ |
453 |
XButtonEvent *ep; |
454 |
{ |
455 |
XButtonEvent eb; |
456 |
|
457 |
XMaskEvent(ButtonReleased, &eb); |
458 |
xoff += eb.x - ep->x; |
459 |
yoff += eb.y - ep->y; |
460 |
XClear(wind); |
461 |
return(redraw(0, 0, width, height)); |
462 |
} |
463 |
|
464 |
|
465 |
getbox(ebut) /* get new box */ |
466 |
XButtonEvent *ebut; |
467 |
{ |
468 |
union { |
469 |
XEvent e; |
470 |
XButtonEvent b; |
471 |
XMouseMovedEvent m; |
472 |
} e; |
473 |
|
474 |
XMaskEvent(ButtonReleased|MouseMoved, &e.e); |
475 |
while (e.e.type == MouseMoved) { |
476 |
revbox(ebut->x, ebut->y, box.xmin = e.m.x, box.ymin = e.m.y); |
477 |
XMaskEvent(ButtonReleased|MouseMoved, &e.e); |
478 |
revbox(ebut->x, ebut->y, box.xmin, box.ymin); |
479 |
} |
480 |
box.xmin = e.b.x<0 ? 0 : (e.b.x>=width ? width-1 : e.b.x); |
481 |
box.ymin = e.b.y<0 ? 0 : (e.b.y>=height ? height-1 : e.b.y); |
482 |
if (box.xmin > ebut->x) { |
483 |
box.xsiz = box.xmin - ebut->x + 1; |
484 |
box.xmin = ebut->x; |
485 |
} else { |
486 |
box.xsiz = ebut->x - box.xmin + 1; |
487 |
} |
488 |
if (box.ymin > ebut->y) { |
489 |
box.ysiz = box.ymin - ebut->y + 1; |
490 |
box.ymin = ebut->y; |
491 |
} else { |
492 |
box.ysiz = ebut->y - box.ymin + 1; |
493 |
} |
494 |
} |
495 |
|
496 |
|
497 |
revbox(x0, y0, x1, y1) /* draw box with reversed lines */ |
498 |
int x0, y0, x1, y1; |
499 |
{ |
500 |
XLine(wind, x0, y0, x1, y0, 1, 1, 0, GXinvert, AllPlanes); |
501 |
XLine(wind, x0, y1, x1, y1, 1, 1, 0, GXinvert, AllPlanes); |
502 |
XLine(wind, x0, y0, x0, y1, 1, 1, 0, GXinvert, AllPlanes); |
503 |
XLine(wind, x1, y0, x1, y1, 1, 1, 0, GXinvert, AllPlanes); |
504 |
} |
505 |
|
506 |
|
507 |
avgbox(clr) /* average color over current box */ |
508 |
COLOR clr; |
509 |
{ |
510 |
int left, right, top, bottom; |
511 |
int y; |
512 |
double d; |
513 |
COLOR ctmp; |
514 |
register int x; |
515 |
|
516 |
setcolor(clr, 0.0, 0.0, 0.0); |
517 |
left = box.xmin - xoff; |
518 |
right = left + box.xsiz; |
519 |
if (left < 0) |
520 |
left = 0; |
521 |
if (right > xmax) |
522 |
right = xmax; |
523 |
if (left >= right) |
524 |
return(-1); |
525 |
top = box.ymin - yoff; |
526 |
bottom = top + box.ysiz; |
527 |
if (top < 0) |
528 |
top = 0; |
529 |
if (bottom > ymax) |
530 |
bottom = ymax; |
531 |
if (top >= bottom) |
532 |
return(-1); |
533 |
for (y = top; y < bottom; y++) { |
534 |
if (getscan(y) == -1) |
535 |
return(-1); |
536 |
for (x = left; x < right; x++) { |
537 |
colr_color(ctmp, scanline[x]); |
538 |
addcolor(clr, ctmp); |
539 |
} |
540 |
} |
541 |
d = 1.0/((right-left)*(bottom-top)); |
542 |
scalecolor(clr, d); |
543 |
return(0); |
544 |
} |
545 |
|
546 |
|
547 |
getmono() /* get monochrome data */ |
548 |
{ |
549 |
register unsigned short *dp; |
550 |
register int x, err; |
551 |
int y; |
552 |
rgbpixel *inl; |
553 |
short *cerr; |
554 |
|
555 |
if ((inl = (rgbpixel *)malloc(xmax*sizeof(rgbpixel))) == NULL |
556 |
|| (cerr = (short *)calloc(xmax,sizeof(short))) == NULL) |
557 |
quiterr("out of memory in getmono"); |
558 |
dp = ourras->data.m - 1; |
559 |
for (y = 0; y < ymax; y++) { |
560 |
picreadline3(y, inl); |
561 |
err = 0; |
562 |
for (x = 0; x < xmax; x++) { |
563 |
if (!(x&0xf)) |
564 |
*++dp = 0; |
565 |
err += rgb_bright(&inl[x]) + cerr[x]; |
566 |
if (err > 127) |
567 |
err -= 255; |
568 |
else |
569 |
*dp |= 1<<(x&0xf); |
570 |
cerr[x] = err >>= 1; |
571 |
} |
572 |
} |
573 |
free((char *)inl); |
574 |
free((char *)cerr); |
575 |
} |
576 |
|
577 |
|
578 |
init_rcolors(xr, cmap) /* (re)assign color values */ |
579 |
register XRASTER *xr; |
580 |
colormap cmap; |
581 |
{ |
582 |
register int i; |
583 |
register unsigned char *p; |
584 |
|
585 |
xr->pmap = (int *)malloc(256*sizeof(int)); |
586 |
if (xr->pmap == NULL) |
587 |
return(0); |
588 |
xr->cdefs = (Color *)malloc(256*sizeof(Color)); |
589 |
if (xr->cdefs == NULL) |
590 |
return(0); |
591 |
for (i = 0; i < 256; i++) |
592 |
xr->pmap[i] = -1; |
593 |
xr->ncolors = 0; |
594 |
for (p = xr->data.bz, i = BZPixmapSize(xr->width,xr->height); i--; p++) |
595 |
if (xr->pmap[*p] == -1) { |
596 |
xr->cdefs[xr->ncolors].red = cmap[0][*p] << 8; |
597 |
xr->cdefs[xr->ncolors].green = cmap[1][*p] << 8; |
598 |
xr->cdefs[xr->ncolors].blue = cmap[2][*p] << 8; |
599 |
xr->cdefs[xr->ncolors].pixel = *p; |
600 |
xr->pmap[*p] = xr->ncolors++; |
601 |
} |
602 |
xr->cdefs = (Color *)realloc((char *)xr->cdefs, xr->ncolors*sizeof(Color)); |
603 |
if (xr->cdefs == NULL) |
604 |
return(0); |
605 |
return(1); |
606 |
} |
607 |
|
608 |
|
609 |
scale_rcolors(xr, sf) /* scale color map */ |
610 |
register XRASTER *xr; |
611 |
double sf; |
612 |
{ |
613 |
register int i; |
614 |
long maxv; |
615 |
|
616 |
if (xr->pixels == NULL) |
617 |
return; |
618 |
|
619 |
sf = pow(sf, 1.0/gamcor); |
620 |
maxv = 65535/sf; |
621 |
|
622 |
for (i = xr->ncolors; i--; ) { |
623 |
xr->cdefs[i].red = xr->cdefs[i].red > maxv ? |
624 |
65535 : |
625 |
xr->cdefs[i].red * sf; |
626 |
xr->cdefs[i].green = xr->cdefs[i].green > maxv ? |
627 |
65535 : |
628 |
xr->cdefs[i].green * sf; |
629 |
xr->cdefs[i].blue = xr->cdefs[i].blue > maxv ? |
630 |
65535 : |
631 |
xr->cdefs[i].blue * sf; |
632 |
} |
633 |
XStoreColors(xr->ncolors, xr->cdefs); |
634 |
} |
635 |
|
636 |
|
637 |
getscan(y) |
638 |
int y; |
639 |
{ |
640 |
if (y != cury) { |
641 |
if (scanpos == NULL || scanpos[y] == -1) |
642 |
return(-1); |
643 |
if (fseek(fin, scanpos[y], 0) == -1) |
644 |
quiterr("fseek error"); |
645 |
cury = y; |
646 |
} else if (scanpos != NULL) |
647 |
scanpos[y] = ftell(fin); |
648 |
|
649 |
if (freadcolrs(scanline, xmax, fin) < 0) |
650 |
quiterr("read error"); |
651 |
|
652 |
cury++; |
653 |
return(0); |
654 |
} |
655 |
|
656 |
|
657 |
picreadline3(y, l3) /* read in 3-byte scanline */ |
658 |
int y; |
659 |
register rgbpixel *l3; |
660 |
{ |
661 |
register int i; |
662 |
/* read scanline */ |
663 |
if (getscan(y) < 0) |
664 |
quiterr("cannot seek for picreadline"); |
665 |
/* convert scanline */ |
666 |
normcolrs(scanline, xmax, scale); |
667 |
for (i = 0; i < xmax; i++) { |
668 |
l3[i].r = scanline[i][RED]; |
669 |
l3[i].g = scanline[i][GRN]; |
670 |
l3[i].b = scanline[i][BLU]; |
671 |
} |
672 |
} |
673 |
|
674 |
|
675 |
picwriteline(y, l) /* add 8-bit scanline to image */ |
676 |
int y; |
677 |
pixel *l; |
678 |
{ |
679 |
bcopy((char *)l, (char *)ourras->data.bz+BZPixmapSize(xmax,y), BZPixmapSize(xmax,1)); |
680 |
} |
681 |
|
682 |
|
683 |
picreadcm(map) /* do gamma correction */ |
684 |
colormap map; |
685 |
{ |
686 |
extern double pow(); |
687 |
register int i, val; |
688 |
|
689 |
for (i = 0; i < 256; i++) { |
690 |
val = pow((i+0.5)/256.0, 1.0/gamcor) * 256.0; |
691 |
map[0][i] = map[1][i] = map[2][i] = val; |
692 |
} |
693 |
} |
694 |
|
695 |
|
696 |
picwritecm(map) /* handled elsewhere */ |
697 |
colormap map; |
698 |
{ |
699 |
#ifdef DEBUG |
700 |
register int i; |
701 |
|
702 |
for (i = 0; i < 256; i++) |
703 |
printf("%d %d %d\n", map[0][i],map[1][i],map[2][i]); |
704 |
#endif |
705 |
} |