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/* Copyright (c) 1992 Regents of the University of California */ |
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/* Copyright (c) 1997 Silicon Graphics, Inc. */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static char SCCSid[] = "$SunId$ SGI"; |
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#endif |
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/* |
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#endif |
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#include "color.h" |
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#define GAMVAL 1.5 /* gamma value for pixels */ |
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#define CODE6GAM 1.47 /* gamma for 6-bit codes */ |
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#define DEFDGAM 1.0 /* default device gamma */ |
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#define GRY -1 /* artificial index for grey */ |
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|
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int wrongformat = 0; /* input in wrong format? */ |
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double pixaspect = 1.0; /* pixel aspect ratio */ |
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|
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double devgam = DEFDGAM; /* device gamma response */ |
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int docolor = 0; /* produce color image? */ |
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int bradj = 0; /* brightness adjustment */ |
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int ncopies = 1; /* number of copies */ |
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|
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extern int Aputprim(), Bputprim(), Cputprim(); |
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|
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int (*putprim)() = Aputprim; /* function for writing scanline */ |
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|
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char *progname; |
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int xmax, ymax; |
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for (i = 1; i < argc; i++) |
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if (argv[i][0] == '-') |
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switch (argv[i][1]) { |
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case 'b': /* produce b&w PostScript */ |
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docolor = 0; |
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break; |
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case 'c': /* produce color PostScript */ |
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docolor++; |
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docolor = 1; |
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break; |
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case 'A': /* standard ASCII encoding */ |
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putprim = Aputprim; |
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break; |
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case 'B': /* standard binary encoding */ |
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putprim = Bputprim; |
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break; |
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case 'C': /* compressed ASCII encoding */ |
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putprim = Cputprim; |
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break; |
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case 'g': |
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devgam = atof(argv[++i]); |
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break; |
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case 'e': /* exposure adjustment */ |
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if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
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goto userr; |
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if (wrongformat || fgetresolu(&xmax, &ymax, stdin) < 0) |
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quiterr("bad picture format"); |
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/* gamma compression */ |
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setcolrgam(GAMVAL); |
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if (putprim == Cputprim) |
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setcolrgam(CODE6GAM/devgam); |
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else if (devgam != 1.) |
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setcolrgam(1./devgam); |
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/* write header */ |
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PSheader(i <= argc-1 ? argv[i] : "<stdin>"); |
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/* convert file */ |
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PStrailer(); |
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exit(0); |
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userr: |
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fprintf(stderr, "Usage: %s [-c][-e +/-stops] [input [output]]\n", |
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fprintf(stderr, "Usage: %s [-b|c][-A|B|C][-e +/-stops][-g gamma] [input [output]]\n", |
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progname); |
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exit(1); |
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} |
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PSheader(name) /* print PostScript header */ |
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char *name; |
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{ |
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char *rstr; |
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int landscape = 0; |
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double pwidth, pheight; |
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double iwidth, iheight; |
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VMARGIN+(pheight-iheight)*.5+iheight); |
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puts("%%EndComments"); |
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puts("gsave save"); |
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puts("64 dict begin"); |
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puts("17 dict begin"); |
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/* define image reader */ |
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if (docolor) { |
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printf("/redline %d string def\n", xmax); |
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printf("/grnline %d string def\n", xmax); |
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printf("/bluline %d string def\n", xmax); |
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printf("/rgbline %d string def\n", 3*xmax); |
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PSprocdef("read6bitRLE", "interleave"); |
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} else { |
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printf("/greyline %d string def\n", xmax); |
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PSprocdef("read6bitRLE", NULL); |
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} |
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} else |
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printf("/gryline %d string def\n", xmax); |
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/* use compressed encoding? */ |
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if (putprim == Cputprim) |
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PSprocdef("read6bitRLE"); |
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/* set up transformation matrix */ |
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printf("%f %f translate\n", HMARGIN, VMARGIN); |
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if (pwidth == PHEIGHT) { |
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printf("%f %f scale\n", iwidth, iheight); |
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puts("%%EndProlog"); |
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/* start image procedure */ |
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printf("%d %d 8 [%d 0 0 %d 0 %d] ", xmax, ymax, xmax, -ymax, ymax); |
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if (docolor) { |
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puts("{redline read6bitRLE grnline read6bitRLE"); |
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puts("\tbluline read6bitRLE rgbline interleave} false 3 colorimage"); |
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} else |
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puts("{greyline read6bitRLE} image"); |
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printf("%d %d 8 [%d 0 0 %d 0 %d]\n", xmax, ymax, xmax, -ymax, ymax); |
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if (putprim == Cputprim) { |
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if (docolor) { |
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puts("{redline read6bitRLE}"); |
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puts("{grnline read6bitRLE}"); |
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puts("{bluline read6bitRLE}"); |
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puts("true 3 colorimage"); |
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} else |
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puts("{gryline read6bitRLE} image"); |
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} else { |
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rstr = putprim==Aputprim ? "readhexstring" : "readstring"; |
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if (docolor) { |
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printf("{currentfile redline %s pop}\n", rstr); |
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printf("{currentfile grnline %s pop}\n", rstr); |
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printf("{currentfile bluline %s pop}\n", rstr); |
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puts("true 3 colorimage"); |
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} else |
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printf("{currentfile gryline %s pop} image\n", rstr); |
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} |
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} |
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} |
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PSprocdef(nam, inam) /* define PS procedure to read image */ |
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char *nam, *inam; |
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PSprocdef(nam) /* define PS procedure to read image */ |
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char *nam; |
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{ |
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short itab[128]; |
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register int i; |
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for (i = 0; i < 128; i++) /* clear */ |
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itab[i] = -1; |
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for (i = 1; i < 63; i++) /* assign greys */ |
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itab[code[i]] = 256.0*pow(((i<<2)+2.5)/256.0, GAMVAL); |
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itab[code[i]] = 256.0*pow((i+.5)/64.0, CODE6GAM); |
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itab[code[0]] = 0; /* black is black */ |
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itab[code[63]] = 255; /* and white is white */ |
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printf("/codetab ["); |
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printf("\t\t} for\n"); |
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printf("\t} stopped {pop pop 0 string} {scanline} ifelse\n"); |
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printf("} bind def\n"); |
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if (inam == NULL) |
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return; |
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/* define interleaving procedure */ |
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printf("/%s {\t%% redscn grnscn bluscn rgbscn\n", inam); |
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printf("\t/rgbscan exch def /bscan exch def\n"); |
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printf("\t/gscan exch def /rscan exch def\n"); |
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printf("\trscan length %d eq gscan length %d eq and ", xmax, xmax); |
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printf("bscan length %d eq and \n", xmax); |
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printf("\t{ 0 1 %d { /ndx exch def\n", xmax-1); |
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printf("\t\trgbscan ndx 3 mul rscan ndx get put\n"); |
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printf("\t\trgbscan ndx 3 mul 1 add gscan ndx get put\n"); |
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printf("\t\trgbscan ndx 3 mul 2 add bscan ndx get put\n"); |
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printf("\t\t} for rgbscan }\n"); |
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printf("\t{0 string} ifelse\n"); |
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printf("} bind def\n"); |
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} |
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for (y = ymax-1; y >= 0; y--) { |
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if (freadcolrs(scanin, xmax, stdin) < 0) |
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quiterr("error reading Radiance picture"); |
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if (bradj) /* adjust exposure */ |
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shiftcolrs(scanin, xmax, bradj); |
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colrs_gambs(scanin, xmax); /* gamma compression */ |
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if (putprim == Cputprim || devgam != 1.) { |
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if (bradj) /* adjust exposure */ |
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shiftcolrs(scanin, xmax, bradj); |
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colrs_gambs(scanin, xmax); /* gamma compression */ |
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} else |
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normcolrs(scanin, xmax, bradj); |
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if (docolor) { |
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putprim(scanin, RED); |
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putprim(scanin, GRN); |
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putprim(scanin, BLU); |
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(*putprim)(scanin, RED); |
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(*putprim)(scanin, GRN); |
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(*putprim)(scanin, BLU); |
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} else |
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putprim(scanin, GRY); |
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(*putprim)(scanin, GRY); |
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if (ferror(stdout)) |
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quiterr("error writing PostScript file"); |
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} |
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} |
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putprim(scn, pri) /* put out one primary from scanline */ |
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int |
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Aputprim(scn, pri) /* put out hex ASCII primary from scanline */ |
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COLR *scn; |
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int pri; |
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{ |
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static char hexdigit[] = "0123456789ABCDEF"; |
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static int col = 0; |
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register int x, c; |
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|
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for (x = 0; x < xmax; x++) { |
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if (pri == GRY) |
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c = normbright(scn[x]); |
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else |
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c = scn[x][pri]; |
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if (c > 255) c = 255; |
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putchar(hexdigit[c>>4]); |
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putchar(hexdigit[c&0xf]); |
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if ((col += 2) >= 72) { |
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putchar('\n'); |
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col = 0; |
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} |
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} |
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} |
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int |
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Bputprim(scn, pri) /* put out binary primary from scanline */ |
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COLR *scn; |
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int pri; |
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{ |
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register int x, c; |
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|
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for (x = 0; x < xmax; x++) { |
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if (pri == GRY) |
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c = normbright(scn[x]); |
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else |
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c = scn[x][pri]; |
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if (c > 255) c = 255; |
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putchar(c); |
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} |
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} |
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int |
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Cputprim(scn, pri) /* put out compressed primary from scanline */ |
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COLR *scn; |
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int pri; |
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{ |