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/* Copyright (c) 1991 Regents of the University of California */ |
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/* Copyright (c) 1992 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#include <stdio.h> |
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|
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#ifdef MSDOS |
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#include <fcntl.h> |
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#endif |
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|
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#include <math.h> |
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|
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#include <ctype.h> |
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#include "color.h" |
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|
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#include "resolu.h" |
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|
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extern double atof(), pow(); |
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|
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extern char *malloc(); |
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|
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int agryscan(), bgryscan(), aclrscan(), bclrscan(); |
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int agryscan2(), bgryscan2(), aclrscan2(), bclrscan2(); |
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int normval(); |
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unsigned int scanint(), intv(), getby2(); |
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|
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#define fltv(i) (((i)+.5)/(maxval+1.)) |
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|
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int bradj = 0; /* brightness adjustment */ |
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|
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double gamcor = 2.2; /* gamma correction value */ |
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|
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int maxval = 255; /* maximum primary value */ |
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|
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char *progname; |
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int argc; |
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char *argv[]; |
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{ |
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double gamma = 2.2; |
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char inpbuf[2]; |
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int gryflag = 0; |
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int binflag = 1; |
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int reverse = 0; |
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int ptype; |
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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 's': |
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maxval = atoi(argv[++i]) & 0xffff; |
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break; |
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case 'b': |
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gryflag = 1; |
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break; |
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case 'g': |
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gamma = atof(argv[++i]); |
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gamcor = atof(argv[++i]); |
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break; |
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case 'e': |
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if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
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exit(1); |
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} |
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if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) { |
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fprintf(stderr, "can't open output \"%s\"\n", |
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fprintf(stderr, "%s: can't open output \"%s\"\n", |
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progname, argv[i+1]); |
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exit(1); |
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} |
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setcolrgam(gamma); |
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if (maxval < 256) |
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setcolrgam(gamcor); |
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if (reverse) { |
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/* get header */ |
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if (getc(stdin) != 'P') |
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if (read(fileno(stdin), inpbuf, 2) != 2 || inpbuf[0] != 'P') |
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quiterr("input not a Poskanzer Pixmap"); |
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ptype = getc(stdin); |
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ptype = inpbuf[1]; |
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#ifdef MSDOS |
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if (ptype > 4) |
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setmode(fileno(stdin), O_BINARY); |
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setmode(fileno(stdout), O_BINARY); |
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#endif |
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xmax = scanint(stdin); |
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ymax = scanint(stdin); |
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maxval = scanint(stdin); |
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/* put header */ |
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newheader("RADIANCE", stdout); |
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printargs(i, argv, stdout); |
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fputformat(COLRFMT, stdout); |
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putchar('\n'); |
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fprtresolu(xmax, ymax, stdout); |
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/* convert file */ |
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switch (ptype) { |
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case '2': |
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ppm2ra(agryscan); |
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break; |
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case '5': |
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ppm2ra(bgryscan); |
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break; |
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case '3': |
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ppm2ra(aclrscan); |
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break; |
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case '6': |
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ppm2ra(bclrscan); |
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break; |
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default: |
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quiterr("unsupported Pixmap type"); |
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} |
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if (maxval >= 256) |
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switch (ptype) { |
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case '2': |
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ppm2ra2(agryscan2); |
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break; |
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case '5': |
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ppm2ra2(bgryscan2); |
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break; |
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case '3': |
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ppm2ra2(aclrscan2); |
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break; |
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case '6': |
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ppm2ra2(bclrscan2); |
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break; |
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default: |
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quiterr("unsupported Pixmap type"); |
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} |
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else |
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switch (ptype) { |
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case '2': |
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ppm2ra(agryscan); |
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break; |
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case '5': |
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ppm2ra(bgryscan); |
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break; |
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case '3': |
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ppm2ra(aclrscan); |
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break; |
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case '6': |
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ppm2ra(bclrscan); |
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break; |
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default: |
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quiterr("unsupported Pixmap type"); |
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} |
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} else { |
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#ifdef MSDOS |
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setmode(fileno(stdin), O_BINARY); |
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if (binflag) |
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setmode(fileno(stdout), O_BINARY); |
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#endif |
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/* get header info. */ |
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if (checkheader(stdin, COLRFMT, NULL) < 0 || |
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fgetresolu(&xmax, &ymax, stdin) < 0) |
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quiterr("bad picture format"); |
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/* write PPM header */ |
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printf("P%c\n%d %d\n%d\n", binflag ? '6' : '3', |
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printf("P%1d\n%d %d\n%u\n", (gryflag?2:3)+(binflag?3:0), |
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xmax, ymax, maxval); |
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/* convert file */ |
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ra2ppm(binflag); |
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if (maxval >= 256) |
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ra2ppm2(binflag, gryflag); |
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else |
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ra2ppm(binflag, gryflag); |
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} |
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exit(0); |
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userr: |
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fprintf(stderr, |
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"Usage: %s [-r][-a][-g gamma][-e +/-stops] [input [output]]\n", |
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"Usage: %s [-r][-a][-b][-s maxv][-g gamma][-e +/-stops] [input [output]]\n", |
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progname); |
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exit(1); |
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} |
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} |
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|
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ppm2ra(getscan) /* convert color Pixmap to Radiance picture */ |
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ppm2ra(getscan) /* convert 1-byte Pixmap to Radiance picture */ |
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int (*getscan)(); |
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{ |
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COLR *scanout; |
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register int x; |
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int y; |
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/* allocate scanline */ |
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scanout = (COLR *)malloc(xmax*sizeof(COLR)); |
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} |
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|
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|
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ra2ppm(binary) /* convert Radiance picture to Pixmap */ |
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int binary; |
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ra2ppm(binary, grey) /* convert Radiance picture to Pixmap */ |
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int binary, grey; |
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{ |
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COLR *scanin; |
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register int x; |
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/* allocate scanline */ |
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scanin = (COLR *)malloc(xmax*sizeof(COLR)); |
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if (scanin == NULL) |
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quiterr("out of memory in ra2pr"); |
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quiterr("out of memory in ra2ppm"); |
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/* convert image */ |
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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) |
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shiftcolrs(scanin, xmax, bradj); |
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for (x = grey?xmax:0; x--; ) |
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scanin[x][GRN] = normbright(scanin[x]); |
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colrs_gambs(scanin, xmax); |
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if (binary) |
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for (x = 0; x < xmax; x++) { |
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putc(scanin[x][RED], stdout); |
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putc(scanin[x][GRN], stdout); |
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putc(scanin[x][BLU], stdout); |
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if (grey) |
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if (binary) |
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for (x = 0; x < xmax; x++) |
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putc(scanin[x][GRN], stdout); |
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else |
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for (x = 0; x < xmax; x++) |
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printf("%d\n", scanin[x][GRN]); |
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else |
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if (binary) |
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for (x = 0; x < xmax; x++) { |
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putc(scanin[x][RED], stdout); |
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putc(scanin[x][GRN], stdout); |
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putc(scanin[x][BLU], stdout); |
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} |
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else |
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for (x = 0; x < xmax; x++) |
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printf("%d %d %d\n", scanin[x][RED], |
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scanin[x][GRN], |
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scanin[x][BLU]); |
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if (ferror(stdout)) |
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quiterr("error writing Pixmap"); |
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} |
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/* free scanline */ |
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free((char *)scanin); |
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} |
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|
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|
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ppm2ra2(getscan) /* convert 2-byte Pixmap to Radiance picture */ |
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int (*getscan)(); |
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{ |
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COLOR *scanout; |
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double mult; |
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int y; |
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register int x; |
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/* allocate scanline */ |
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scanout = (COLOR *)malloc(xmax*sizeof(COLOR)); |
274 |
> |
if (scanout == NULL) |
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quiterr("out of memory in ppm2ra2"); |
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if (bradj) |
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mult = pow(2., (double)bradj); |
278 |
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/* convert image */ |
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for (y = ymax-1; y >= 0; y--) { |
280 |
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if ((*getscan)(scanout, xmax, stdin) < 0) |
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quiterr("error reading Pixmap"); |
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> |
for (x = gamcor>1.01|gamcor<0.99?xmax:0; x--; ) { |
283 |
> |
colval(scanout[x],RED) = |
284 |
> |
pow(colval(scanout[x],RED), gamcor); |
285 |
> |
colval(scanout[x],GRN) = |
286 |
> |
pow(colval(scanout[x],GRN), gamcor); |
287 |
> |
colval(scanout[x],BLU) = |
288 |
> |
pow(colval(scanout[x],BLU), gamcor); |
289 |
> |
} |
290 |
> |
for (x = bradj?xmax:0; x--; ) |
291 |
> |
scalecolor(scanout[x], mult); |
292 |
> |
if (fwritescan(scanout, xmax, stdout) < 0) |
293 |
> |
quiterr("error writing Radiance picture"); |
294 |
> |
} |
295 |
> |
/* free scanline */ |
296 |
> |
free((char *)scanout); |
297 |
> |
} |
298 |
> |
|
299 |
> |
|
300 |
> |
ra2ppm2(binary, grey) /* convert Radiance picture to Pixmap (2-byte) */ |
301 |
> |
int binary, grey; |
302 |
> |
{ |
303 |
> |
COLOR *scanin; |
304 |
> |
double mult, d; |
305 |
> |
register int x; |
306 |
> |
int y; |
307 |
> |
/* allocate scanline */ |
308 |
> |
scanin = (COLOR *)malloc(xmax*sizeof(COLOR)); |
309 |
> |
if (scanin == NULL) |
310 |
> |
quiterr("out of memory in ra2ppm2"); |
311 |
> |
if (bradj) |
312 |
> |
mult = pow(2., (double)bradj); |
313 |
> |
/* convert image */ |
314 |
> |
for (y = ymax-1; y >= 0; y--) { |
315 |
> |
if (freadscan(scanin, xmax, stdin) < 0) |
316 |
> |
quiterr("error reading Radiance picture"); |
317 |
> |
for (x = bradj?xmax:0; x--; ) |
318 |
> |
scalecolor(scanin[x], mult); |
319 |
> |
for (x = grey?xmax:0; x--; ) |
320 |
> |
colval(scanin[x],GRN) = bright(scanin[x]); |
321 |
> |
d = 1./gamcor; |
322 |
> |
for (x = d>1.01|d<0.99?xmax:0; x--; ) { |
323 |
> |
colval(scanin[x],GRN) = pow(colval(scanin[x],GRN), d); |
324 |
> |
if (!grey) { |
325 |
> |
colval(scanin[x],RED) = |
326 |
> |
pow(colval(scanin[x],RED), d); |
327 |
> |
colval(scanin[x],BLU) = |
328 |
> |
pow(colval(scanin[x],BLU), d); |
329 |
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} |
330 |
+ |
} |
331 |
+ |
if (grey) |
332 |
+ |
if (binary) |
333 |
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for (x = 0; x < xmax; x++) |
334 |
+ |
putby2(intv(colval(scanin[x],GRN)), |
335 |
+ |
stdout); |
336 |
+ |
else |
337 |
+ |
for (x = 0; x < xmax; x++) |
338 |
+ |
printf("%u\n", |
339 |
+ |
intv(colval(scanin[x],GRN))); |
340 |
|
else |
341 |
< |
for (x = 0; x < xmax; x++) |
342 |
< |
printf("%d %d %d\n", scanin[x][RED], |
343 |
< |
scanin[x][GRN], |
344 |
< |
scanin[x][BLU]); |
341 |
> |
if (binary) |
342 |
> |
for (x = 0; x < xmax; x++) { |
343 |
> |
putby2(intv(colval(scanin[x],RED)), |
344 |
> |
stdout); |
345 |
> |
putby2(intv(colval(scanin[x],GRN)), |
346 |
> |
stdout); |
347 |
> |
putby2(intv(colval(scanin[x],BLU)), |
348 |
> |
stdout); |
349 |
> |
} |
350 |
> |
else |
351 |
> |
for (x = 0; x < xmax; x++) |
352 |
> |
printf("%u %u %u\n", |
353 |
> |
intv(colval(scanin[x],RED)), |
354 |
> |
intv(colval(scanin[x],GRN)), |
355 |
> |
intv(colval(scanin[x],BLU))); |
356 |
|
if (ferror(stdout)) |
357 |
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quiterr("error writing Pixmap"); |
358 |
|
} |
439 |
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} |
440 |
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|
441 |
|
|
442 |
< |
int |
442 |
> |
agryscan2(scan, len, fp) /* get an ASCII greyscale scanline */ |
443 |
> |
register COLOR *scan; |
444 |
> |
register int len; |
445 |
> |
FILE *fp; |
446 |
> |
{ |
447 |
> |
while (len-- > 0) { |
448 |
> |
colval(scan[0],RED) = |
449 |
> |
colval(scan[0],GRN) = |
450 |
> |
colval(scan[0],BLU) = fltv(scanint(fp)); |
451 |
> |
scan++; |
452 |
> |
} |
453 |
> |
return(0); |
454 |
> |
} |
455 |
> |
|
456 |
> |
|
457 |
> |
bgryscan2(scan, len, fp) /* get a binary greyscale scanline */ |
458 |
> |
register COLOR *scan; |
459 |
> |
int len; |
460 |
> |
register FILE *fp; |
461 |
> |
{ |
462 |
> |
register int c; |
463 |
> |
|
464 |
> |
while (len-- > 0) { |
465 |
> |
if ((c = getby2(fp)) == EOF) |
466 |
> |
return(-1); |
467 |
> |
colval(scan[0],RED) = |
468 |
> |
colval(scan[0],GRN) = |
469 |
> |
colval(scan[0],BLU) = fltv(c); |
470 |
> |
scan++; |
471 |
> |
} |
472 |
> |
return(0); |
473 |
> |
} |
474 |
> |
|
475 |
> |
|
476 |
> |
aclrscan2(scan, len, fp) /* get an ASCII color scanline */ |
477 |
> |
register COLOR *scan; |
478 |
> |
register int len; |
479 |
> |
FILE *fp; |
480 |
> |
{ |
481 |
> |
while (len-- > 0) { |
482 |
> |
colval(scan[0],RED) = fltv(scanint(fp)); |
483 |
> |
colval(scan[0],GRN) = fltv(scanint(fp)); |
484 |
> |
colval(scan[0],BLU) = fltv(scanint(fp)); |
485 |
> |
scan++; |
486 |
> |
} |
487 |
> |
return(0); |
488 |
> |
} |
489 |
> |
|
490 |
> |
|
491 |
> |
bclrscan2(scan, len, fp) /* get a binary color scanline */ |
492 |
> |
register COLOR *scan; |
493 |
> |
int len; |
494 |
> |
register FILE *fp; |
495 |
> |
{ |
496 |
> |
int r, g, b; |
497 |
> |
|
498 |
> |
while (len-- > 0) { |
499 |
> |
r = getby2(fp); |
500 |
> |
g = getby2(fp); |
501 |
> |
if ((b = getby2(fp)) == EOF) |
502 |
> |
return(-1); |
503 |
> |
scan[0][RED] = fltv(r); |
504 |
> |
scan[0][GRN] = fltv(g); |
505 |
> |
scan[0][BLU] = fltv(b); |
506 |
> |
scan++; |
507 |
> |
} |
508 |
> |
return(0); |
509 |
> |
} |
510 |
> |
|
511 |
> |
|
512 |
> |
unsigned int |
513 |
|
scanint(fp) /* scan the next positive integer value */ |
514 |
|
register FILE *fp; |
515 |
|
{ |
516 |
< |
register int i, c; |
516 |
> |
register int c; |
517 |
> |
register unsigned int i; |
518 |
|
tryagain: |
519 |
|
while (isspace(c = getc(fp))) |
520 |
|
; |
539 |
|
|
540 |
|
int |
541 |
|
normval(v) /* normalize a value to [0,255] */ |
542 |
< |
register int v; |
542 |
> |
register unsigned int v; |
543 |
|
{ |
544 |
|
if (v >= maxval) |
545 |
|
return(255); |
546 |
|
if (maxval == 255) |
547 |
|
return(v); |
548 |
|
return(v*255L/maxval); |
549 |
+ |
} |
550 |
+ |
|
551 |
+ |
|
552 |
+ |
unsigned int |
553 |
+ |
getby2(fp) /* return 2-byte quantity from fp */ |
554 |
+ |
register FILE *fp; |
555 |
+ |
{ |
556 |
+ |
register int lowerb, upperb; |
557 |
+ |
|
558 |
+ |
lowerb = getc(fp); |
559 |
+ |
upperb = getc(fp); |
560 |
+ |
if (upperb == EOF) |
561 |
+ |
return(EOF); |
562 |
+ |
return(upperb<<8 | lowerb); |
563 |
+ |
} |
564 |
+ |
|
565 |
+ |
|
566 |
+ |
putby2(w, fp) /* put 2-byte quantity to fp */ |
567 |
+ |
register unsigned int w; |
568 |
+ |
register FILE *fp; |
569 |
+ |
{ |
570 |
+ |
putc(w & 0xff, fp); |
571 |
+ |
putc(w>>8 & 0xff, fp); |
572 |
+ |
if (ferror(fp)) { |
573 |
+ |
fprintf(stderr, "%s: write error on PPM output\n", progname); |
574 |
+ |
exit(1); |
575 |
+ |
} |
576 |
+ |
} |
577 |
+ |
|
578 |
+ |
|
579 |
+ |
unsigned int |
580 |
+ |
intv(v) /* return integer quantity for v */ |
581 |
+ |
register double v; |
582 |
+ |
{ |
583 |
+ |
if (v >= 0.99999) |
584 |
+ |
return(maxval); |
585 |
+ |
if (v <= 0.) |
586 |
+ |
return(0); |
587 |
+ |
return((int)(v*(maxval+1))); |
588 |
|
} |