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/* Copyright (c) 1990 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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#endif
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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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#include <stdio.h>
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#include "rasterfile.h"
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#include "color.h"
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extern double atof(), pow();
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double gamma = 2.0; /* gamma correction */
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char *progname;
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int xmax, ymax;
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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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progname = argv[0];
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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 '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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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_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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putchar('\n');
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fputresolu(YMAJOR|YDECR, xmax, ymax, stdout);
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/* convert file */
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pr2ra();
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} else {
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/* discard input header */
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getheader(stdin, NULL);
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/* get resolution */
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if (fgetresolu(&xmax, &ymax, stdin) != (YMAJOR|YDECR))
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quiterr("bad picture size");
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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] [input [output]]\n",
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progname);
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exit(1);
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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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pr2ra() /* convert 24-bit scanlines to Radiance picture */
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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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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 (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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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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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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}
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