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greg |
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/* 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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} |
