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greg |
1.1 |
/* Copyright (c) 1986 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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* mt160r.c - program to dump pixel file to Mannesman-Tally 160.
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*
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* 8/16/85
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*/
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#include <stdio.h>
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#include "color.h"
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#define NCOLS 880 /* for wide carriage */
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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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int i;
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int status = 0;
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if (argc < 2)
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status += printp(NULL) == -1;
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else
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for (i = 1; i < argc; i++)
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status += printp(argv[i]) == -1;
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exit(status);
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}
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printp(fname) /* print a picture */
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char *fname;
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{
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FILE *input;
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int xres, yres;
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COLOR scanline[NCOLS];
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char sbuf[256];
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int i;
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if (fname == NULL) {
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input = stdin;
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fname = "<stdin>";
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} else if ((input = fopen(fname, "r")) == NULL) {
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fprintf(stderr, "%s: cannot open\n", fname);
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return(-1);
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}
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/* discard header */
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while (fgets(sbuf, sizeof(sbuf), input) != NULL && sbuf[0] != '\n')
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;
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/* get picture dimensions */
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greg |
1.2 |
if (fgetresolu(&xres, &yres, input) != (YMAJOR|YDECR)) {
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greg |
1.1 |
fprintf(stderr, "%s: bad picture size\n", fname);
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return(-1);
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}
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if (xres > NCOLS) {
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fprintf(stderr, "%s: resolution mismatch\n", fname);
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return(-1);
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}
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fputs("\033[6~\033[7z", stdout);
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for (i = yres-1; i >= 0; i--) {
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if (freadscan(scanline, xres, input) < 0) {
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fprintf(stderr, "%s: read error (y=%d)\n", fname, i);
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return(-1);
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}
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plotscan(scanline, xres, i);
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}
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fputs("\f\033[6~", stdout);
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fclose(input);
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return(0);
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}
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plotscan(scan, len, y) /* plot a scanline */
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COLOR scan[];
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int len;
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int y;
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{
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static BYTE pat[NCOLS];
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int bpos;
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register int i;
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if (bpos = y & 7) {
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for (i = 0; i < len; i++)
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pat[i] |= bit(scan[i], i) << bpos;
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} else {
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fputs("\033%5", stdout);
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putchar(len & 255);
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putchar(len >> 8);
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for (i = 0; i < len; i++) {
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pat[i] |= bit(scan[i], i);
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putchar(pat[i]);
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pat[i] = 0;
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}
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putchar('\r');
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putchar('\n');
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}
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}
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bit(col, x) /* return bit for color at x */
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COLOR col;
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register int x;
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{
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static float cerr[NCOLS];
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static double err;
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double b;
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register int isblack;
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b = bright(col);
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if (b > 1.0) b = 1.0;
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err += b + cerr[x];
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isblack = err < 0.5;
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if (!isblack) err -= 1.0;
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cerr[x] = err *= 0.5;
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return(isblack);
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}
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