extern COLOR *
nextscan(void) /* read and condition next scanline */
{
if (nread >= numscans(&inpres)) {
if (cwarpfile != NULL)
free3dw(cwarp);
free((void *)scanbuf);
return(scanbuf = NULL);
}
if (what2do&DO_ACUITY)
acuscan(scanbuf, nread);
else if (freadscan(scanbuf, scanlen(&inpres), infp) < 0) {
fprintf(stderr, "%s: %s: scanline read error\n",
progname, infn);
exit(1);
}
if (what2do&DO_VEIL) /* add veiling */
addveil(scanbuf, nread);
if (what2do&DO_COLOR) /* scotopic color loss */
scotscan(scanbuf, scanlen(&inpres));
if (what2do&DO_LINEAR) /* map luminances */
sfscan(scanbuf, scanlen(&inpres), scalef);
else
mapscan(scanbuf, scanlen(&inpres));
if (mbcalfile != NULL) /* device color correction */
mbscan(scanbuf, scanlen(&inpres), &mbcond);
else if (cwarpfile != NULL) /* device color space warp */
cwscan(scanbuf, scanlen(&inpres), cwarp);
else if ((lumf == cielum) | (inprims != outprims))
matscan(scanbuf, scanlen(&inpres), mbcond.cmat);
nread++;
return(scanbuf);
}
static void
checkfile(void) /* ready a file */
{
register int i;
/* process header */
gotview = 0;
if (echoheader) {
fputs(input[nfiles].name, stdout);
fputs(":\n", stdout);
}
getheader(input[nfiles].fp, headline, NULL);
if (wrongformat < 0) {
eputs(input[nfiles].name);
eputs(": not a Radiance picture\n");
quit(1);
}
if (wrongformat > 0) {
wputs(input[nfiles].name);
wputs(": warning -- incompatible picture format\n");
}
if (!gotview || setview(&input[nfiles].vw) != NULL)
input[nfiles].vw.type = 0;
if (!fgetsresolu(&input[nfiles].rs, input[nfiles].fp)) {
eputs(input[nfiles].name);
eputs(": bad picture size\n");
quit(1);
}
if (xmax == 0 && ymax == 0) {
xmax = scanlen(&input[nfiles].rs);
ymax = numscans(&input[nfiles].rs);
} else if (scanlen(&input[nfiles].rs) != xmax ||
numscans(&input[nfiles].rs) != ymax) {
eputs(input[nfiles].name);
eputs(": resolution mismatch\n");
quit(1);
}
/* allocate scanlines */
for (i = 0; i < WINSIZ; i++)
input[nfiles].scan[i] = (COLOR *)emalloc(xmax*sizeof(COLOR));
}
static void
valtopix(void) /* convert values to a pixel file */
{
int dogamma;
register COLOR *scanln;
int y;
register int x;
scanln = (COLOR *)malloc(scanlen(&picres)*sizeof(COLOR));
if (scanln == NULL) {
fprintf(stderr, "%s: out of memory\n", progname);
quit(1);
}
dogamma = gamcor < .95 || gamcor > 1.05;
set_io();
for (y = 0; y < numscans(&picres); y++) {
for (x = 0; x < scanlen(&picres); x++) {
if (!dataonly) {
fscanf(fin, "%*d %*d");
if (fin2 != NULL) {
fscanf(fin2, "%*d %*d");
fscanf(fin3, "%*d %*d");
}
}
if ((*getval)(scanln[x]) < 0) {
fprintf(stderr, "%s: read error\n", progname);
quit(1);
}
if (dogamma)
setcolor(scanln[x],
pow(colval(scanln[x],RED), gamcor),
pow(colval(scanln[x],GRN), gamcor),
pow(colval(scanln[x],BLU), gamcor));
if (doexposure)
multcolor(scanln[x], exposure);
}
if (fwritescan(scanln, scanlen(&picres), stdout) < 0) {
fprintf(stderr, "%s: write error\n", progname);
quit(1);
}
}
free((void *)scanln);
}
static void
init( /* get view and find window */
char *pname,
char *wname
)
{
extern Window xfindwind();
XWindowAttributes wa;
XColor xc;
XGCValues gcv;
register int i;
/* get the viewing parameters */
if (viewfile(pname, &ourview, &pres) <= 0 ||
setview(&ourview) != NULL) {
fprintf(stderr, "%s: cannot get view from \"%s\"\n",
progname, pname);
exit(1);
}
/* open the display */
if ((theDisplay = XOpenDisplay(NULL)) == NULL) {
fprintf(stderr,
"%s: cannot open display; DISPLAY variable set?\n",
progname);
exit(1);
}
/* find our window */
if (wname == NULL) {
/* remove directory prefix from name */
for (i = strlen(pname); i-- > 0; )
if (pname[i] == '/')
break;
wname = pname+i+1;
i = 0;
} else
i = 1;
gwind = xfindwind(theDisplay, rwind, wname, 4);
if (gwind == None) {
if (i) {
fprintf(stderr, "%s: cannot find \"%s\" window\n",
progname, wname);
exit(2);
}
/* start ximage */
if (fork() == 0) {
execlp(XIM, XIM, "-c", "256", pname, 0);
perror(XIM);
fprintf(stderr, "%s: cannot start %s\n",
progname, XIM);
kill(getppid(), SIGPIPE);
_exit(1);
}
do
sleep(8);
while ((gwind=xfindwind(theDisplay,rwind,wname,4)) == None);
} else
XMapRaised(theDisplay, gwind);
do {
XGetWindowAttributes(theDisplay, gwind, &wa);
sleep(6);
} while (wa.map_state != IsViewable);
if (wa.width != scanlen(&pres) || wa.height != numscans(&pres)) {
fprintf(stderr,
"%s: warning -- window seems to be the wrong size!\n",
progname);
if (pres.rt & YMAJOR) {
pres.xr = wa.width;
pres.yr = wa.height;
} else {
pres.xr = wa.height;
pres.yr = wa.width;
}
}
/* set graphics context */
gcv.font = XLoadFont(theDisplay, FONTNAME);
if (gcv.font == 0) {
fprintf(stderr, "%s: cannot load font \"%s\"\n",
progname, FONTNAME);
exit(1);
}
xc.red = col[0] >= 1.0 ? 65535 : (unsigned)(65536*col[0]);
xc.green = col[1] >= 1.0 ? 65535 : (unsigned)(65536*col[1]);
xc.blue = col[2] >= 1.0 ? 65535 : (unsigned)(65536*col[2]);
xc.flags = DoRed|DoGreen|DoBlue;
gcv.background = xc.green >= 32768 ?
BlackPixel(theDisplay,DefaultScreen(theDisplay)) :
WhitePixel(theDisplay,DefaultScreen(theDisplay)) ;
if (XAllocColor(theDisplay, wa.colormap, &xc)) {
gcv.foreground = xc.pixel;
vecGC = XCreateGC(theDisplay,gwind,
GCForeground|GCBackground|GCFont,&gcv);
strGC = vecGC;
} else {
gcv.function = GXinvert;
vecGC = XCreateGC(theDisplay,gwind,GCFunction,&gcv);
gcv.foreground = xc.green < 32768 ?
BlackPixel(theDisplay,DefaultScreen(theDisplay)) :
WhitePixel(theDisplay,DefaultScreen(theDisplay)) ;
strGC = XCreateGC(theDisplay,gwind,
GCForeground|GCBackground|GCFont,&gcv);
}
}
static void
pixtoval(void) /* convert picture to values */
{
register COLOR *scanln;
int dogamma;
COLOR lastc;
RREAL hv[2];
int startprim, endprim;
long startpos;
int y;
register int x;
scanln = (COLOR *)malloc(scanlen(&picres)*sizeof(COLOR));
if (scanln == NULL) {
fprintf(stderr, "%s: out of memory\n", progname);
quit(1);
}
dogamma = gamcor < .95 || gamcor > 1.05;
if (putprim == ALL && !interleave) {
startprim = RED; endprim = BLU;
startpos = ftell(fin);
} else {
startprim = putprim; endprim = putprim;
}
for (putprim = startprim; putprim <= endprim; putprim++) {
if (putprim != startprim && fseek(fin, startpos, 0)) {
fprintf(stderr, "%s: seek error on input file\n",
progname);
quit(1);
}
set_io();
setcolor(lastc, 0.0, 0.0, 0.0);
for (y = 0; y < numscans(&picres); y++) {
if (freadscan(scanln, scanlen(&picres), fin) < 0) {
fprintf(stderr, "%s: read error\n", progname);
quit(1);
}
for (x = 0; x < scanlen(&picres); x++) {
if (uniq) {
if ( colval(scanln[x],RED) ==
colval(lastc,RED) &&
colval(scanln[x],GRN) ==
colval(lastc,GRN) &&
colval(scanln[x],BLU) ==
colval(lastc,BLU) )
continue;
else
copycolor(lastc, scanln[x]);
}
if (doexposure)
multcolor(scanln[x], exposure);
if (dogamma)
setcolor(scanln[x],
pow(colval(scanln[x],RED), 1.0/gamcor),
pow(colval(scanln[x],GRN), 1.0/gamcor),
pow(colval(scanln[x],BLU), 1.0/gamcor));
if (!dataonly) {
pix2loc(hv, &picres, x, y);
printf("%7d %7d ",
(int)(hv[0]*picres.xr),
(int)(hv[1]*picres.yr));
}
if ((*putval)(scanln[x]) < 0) {
fprintf(stderr, "%s: write error\n",
progname);
quit(1);
}
}
}
}
free((void *)scanln);
}
void
addpicz( /* add a picture + depth-buffer */
char *pcf,
char *zbf
)
{
FILE *pfp;
int zfd;
COLR *cscn;
float *zscn;
struct phead phd;
int eshft;
double emult;
RESOLU prs;
RREAL vl[2];
FVECT ro, rd;
double aftd;
COLOR ctmp;
int j;
register int i;
/* open files */
if ((pfp = fopen(pcf, "r")) == NULL) {
sprintf(errmsg, "cannot open picture file \"%s\"", pcf);
error(SYSTEM, pcf);
}
if ((zfd = open(zbf, O_RDONLY)) < 0) {
sprintf(errmsg, "cannot open depth file \"%s\"", zbf);
error(SYSTEM, pcf);
}
/* load picture header */
phd.vw = stdview;
phd.expos = 1.0;
phd.badfmt = phd.gotview = phd.altprims = 0;
if (getheader(pfp, picheadline, &phd) < 0 ||
phd.badfmt || !fgetsresolu(&prs, pfp)) {
sprintf(errmsg, "bad format for picture file \"%s\"", pcf);
error(USER, errmsg);
}
if (!phd.gotview || setview(&phd.vw) != NULL) {
sprintf(errmsg, "missing/illegal view in picture \"%s\"",
pcf);
error(USER, errmsg);
}
if (phd.altprims) {
sprintf(errmsg, "ignoring primary values in picture \"%s\"",
pcf);
error(WARNING, errmsg);
}
/* figure out what to do about exposure */
if ((phd.expos < 0.99) | (phd.expos > 1.01)) {
emult = -log(phd.expos)/log(2.);
eshft = emult >= 0. ? emult+.5 : emult-.5;
emult -= (double)eshft;
if ((emult <= 0.01) & (emult >= -0.01))
emult = -1.;
else {
emult = 1./phd.expos;
eshft = 0;
}
} else {
emult = -1.;
eshft = 0;
}
/* allocate buffers */
cscn = (COLR *)malloc(scanlen(&prs)*sizeof(COLR));
zscn = (float *)malloc(scanlen(&prs)*sizeof(float));
if ((cscn == NULL) | (zscn == NULL))
error(SYSTEM, "out of memory in addpicz");
/* read and process each scanline */
for (j = 0; j < numscans(&prs); j++) {
i = scanlen(&prs); /* read colrs */
if (freadcolrs(cscn, i, pfp) < 0) {
sprintf(errmsg, "error reading picture \"%s\"", pcf);
error(USER, errmsg);
}
if (eshft) /* shift exposure */
shiftcolrs(cscn, i, eshft);
i *= sizeof(float); /* read depth */
if (read(zfd, (char *)zscn, i) != i) {
sprintf(errmsg, "error reading depth file \"%s\"", zbf);
error(USER, errmsg);
}
for (i = scanlen(&prs); i--; ) { /* do each pixel */
pix2loc(vl, &prs, i, j);
aftd = viewray(ro, rd, &phd.vw, vl[0], vl[1]);
if (aftd < -FTINY)
continue; /* off view */
if (aftd > FTINY && zscn[i] > aftd)
continue; /* aft clipped */
if (emult > 0.) { /* whatta pain */
colr_color(ctmp, cscn[i]);
scalecolor(ctmp, emult);
setcolr(cscn[i], colval(ctmp,RED),
colval(ctmp,GRN), colval(ctmp,BLU));
}
addray(ro, rd, (double)zscn[i], cscn[i]);
}
}
/* write output and free beams */
hdflush(NULL);
/* clean up */
free((void *)cscn);
free((void *)zscn);
fclose(pfp);
close(zfd);
}
