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- /* Copyright (c) 1991 Regents of the University of California */
-
- #ifndef lint
- static char SCCSid[] = "@(#)mt160r.c 2.3 1/29/92 LBL";
- #endif
-
- /*
- * mt160r.c - program to dump pixel file to Mannesman-Tally 160.
- *
- * 8/16/85
- */
-
- #include <stdio.h>
- #ifdef MSDOS
- #include <fcntl.h>
- #endif
-
- #include "color.h"
- #include "resolu.h"
-
- #define NCOLS 880 /* for wide carriage */
-
-
- main(argc, argv)
- int argc;
- char *argv[];
- {
- int i;
- int status = 0;
- #ifdef MSDOS
- extern int _fmode;
- _fmode = O_BINARY;
- setmode(fileno(stdin), O_BINARY);
- setmode(fileno(stdout), O_BINARY);
- #endif
- if (argc < 2)
- status += printp(NULL) == -1;
- else
- for (i = 1; i < argc; i++)
- status += printp(argv[i]) == -1;
- exit(status);
- }
-
-
- printp(fname) /* print a picture */
- char *fname;
- {
- FILE *input;
- int xres, yres;
- COLR scanline[NCOLS];
- int i;
-
- if (fname == NULL) {
- input = stdin;
- fname = "<stdin>";
- } else if ((input = fopen(fname, "r")) == NULL) {
- fprintf(stderr, "%s: cannot open\n", fname);
- return(-1);
- }
- /* discard header */
- if (checkheader(input, COLRFMT, NULL) < 0) {
- fprintf(stderr, "%s: not a Radiance picture\n", fname);
- return(-1);
- }
- /* get picture dimensions */
- if (fgetresolu(&xres, &yres, input) < 0) {
- fprintf(stderr, "%s: bad picture size\n", fname);
- return(-1);
- }
- if (xres > NCOLS) {
- fprintf(stderr, "%s: resolution mismatch\n", fname);
- return(-1);
- }
-
- fputs("\033[6~\033[7z", stdout);
- #ifdef _IOLBF
- stdout->_flag &= ~_IOLBF;
- #endif
-
- for (i = yres-1; i >= 0; i--) {
- if (freadcolrs(scanline, xres, input) < 0) {
- fprintf(stderr, "%s: read error (y=%d)\n", fname, i);
- return(-1);
- }
- normcolrs(scanline, xres, 0);
- plotscan(scanline, xres, i);
- }
-
- fputs("\f\033[6~", stdout);
-
- fclose(input);
-
- return(0);
- }
-
-
- plotscan(scan, len, y) /* plot a scanline */
- COLR scan[];
- int len;
- int y;
- {
- static BYTE pat[NCOLS];
- int bpos;
- register int i;
-
- if (bpos = y & 7) {
-
- for (i = 0; i < len; i++)
- pat[i] |= bit(scan[i], i) << bpos;
-
- } else {
-
- fputs("\033%5", stdout);
- putchar(len & 255);
- putchar(len >> 8);
-
- for (i = 0; i < len; i++) {
- pat[i] |= bit(scan[i], i);
- putchar(pat[i]);
- pat[i] = 0;
- }
- putchar('\r');
- putchar('\n');
- fflush(stdout);
- }
- }
-
-
- bit(clr, x) /* return bit for color at x */
- COLR clr;
- register int x;
- {
- static int cerr[NCOLS];
- static int err;
- int b, errp;
- register int isblack;
-
- b = normbright(clr);
- errp = err;
- err += b + cerr[x];
- isblack = err < 128;
- if (!isblack) err -= 256;
- err /= 3;
- cerr[x] = err + errp;
- return(isblack);
- }
-