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/* Copyright (c) 1991 Regents of the University of California */ |
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|
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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|
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/* |
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* program to convert between RADIANCE and 24-bit rasterfiles. |
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*/ |
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|
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#include <stdio.h> |
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|
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#include "rasterfile.h" |
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|
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#include "color.h" |
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|
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extern double atof(), pow(); |
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|
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double gamma = 2.0; /* gamma correction */ |
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|
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int bradj = 0; /* brightness adjustment */ |
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|
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char *progname; |
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|
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int xmax, ymax; |
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|
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|
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main(argc, argv) |
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int argc; |
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char *argv[]; |
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{ |
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struct rasterfile head; |
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int reverse = 0; |
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int i; |
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|
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progname = argv[0]; |
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|
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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 'g': |
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gamma = 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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goto userr; |
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bradj = atoi(argv[++i]); |
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break; |
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case 'r': |
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reverse = !reverse; |
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break; |
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default: |
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goto userr; |
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} |
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else |
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break; |
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|
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if (i < argc-2) |
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goto userr; |
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if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) { |
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fprintf(stderr, "%s: can't open input \"%s\"\n", |
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progname, argv[i]); |
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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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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 (reverse) { |
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/* get header */ |
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if (fread((char *)&head, sizeof(head), 1, stdin) != 1) |
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quiterr("missing header"); |
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if (head.ras_magic != RAS_MAGIC) |
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quiterr("bad raster format"); |
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xmax = head.ras_width; |
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ymax = head.ras_height; |
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if ((head.ras_type != RT_STANDARD |
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&& head.ras_type != RT_FORMAT_RGB) |
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|| head.ras_maptype != RMT_NONE |
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|| head.ras_depth != 24) |
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quiterr("incompatible format"); |
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/* put header */ |
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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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fputresolu(YMAJOR|YDECR, xmax, ymax, stdout); |
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/* convert file */ |
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pr2ra(head.ras_type); |
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} else { |
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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) != (YMAJOR|YDECR)) |
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quiterr("bad picture format"); |
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/* write rasterfile header */ |
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head.ras_magic = RAS_MAGIC; |
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head.ras_width = xmax; |
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head.ras_height = ymax; |
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head.ras_depth = 24; |
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head.ras_length = xmax*ymax*3; |
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head.ras_type = RT_STANDARD; |
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head.ras_maptype = RMT_NONE; |
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head.ras_maplength = 0; |
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fwrite((char *)&head, sizeof(head), 1, stdout); |
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/* convert file */ |
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ra2pr(); |
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} |
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exit(0); |
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userr: |
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fprintf(stderr, "Usage: %s [-r][-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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quiterr(err) /* print message and exit */ |
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char *err; |
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{ |
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if (err != NULL) { |
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fprintf(stderr, "%s: %s\n", progname, err); |
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exit(1); |
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} |
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exit(0); |
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} |
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|
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|
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pr2ra(rf) /* convert 24-bit scanlines to Radiance picture */ |
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int rf; |
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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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if (scanout == NULL) |
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quiterr("out of memory in pr2ra"); |
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/* convert image */ |
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for (y = ymax-1; y >= 0; y--) { |
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for (x = 0; x < xmax; x++) |
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if (rf == RT_FORMAT_RGB) { |
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scanout[x][RED] = getc(stdin); |
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scanout[x][GRN] = getc(stdin); |
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scanout[x][BLU] = getc(stdin); |
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} else { |
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scanout[x][BLU] = getc(stdin); |
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scanout[x][GRN] = getc(stdin); |
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scanout[x][RED] = getc(stdin); |
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} |
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if (feof(stdin) || ferror(stdin)) |
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quiterr("error reading rasterfile"); |
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gambs_colrs(scanout, xmax); |
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if (bradj) |
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shiftcolrs(scanout, xmax, bradj); |
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if (fwritecolrs(scanout, xmax, stdout) < 0) |
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quiterr("error writing Radiance picture"); |
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} |
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/* free scanline */ |
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free((char *)scanout); |
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} |
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|
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|
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ra2pr() /* convert Radiance scanlines to 24-bit rasterfile */ |
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{ |
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COLR *scanin; |
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register int x; |
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int y; |
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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 pr2ra"); |
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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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colrs_gambs(scanin, xmax); |
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for (x = 0; x < xmax; x++) { |
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putc(scanin[x][BLU], stdout); |
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putc(scanin[x][GRN], stdout); |
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putc(scanin[x][RED], stdout); |
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} |
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if (ferror(stdout)) |
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quiterr("error writing rasterfile"); |
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} |
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/* free scanline */ |
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free((char *)scanin); |
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} |
