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#ifndef lint
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static const char RCSid[] = "$Id: mt160r.c,v 2.8 2004/03/28 20:33:14 schorsch Exp $";
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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 <time.h>
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#include "platform.h"
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#include "color.h"
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#include "resolu.h"
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#define NCOLS 880 /* for wide carriage */
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static int printp(char *fname);
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static void plotscan(COLR scan[], int len, int y);
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static int bit(COLR clr, int x);
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int
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main(
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int argc,
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char *argv[]
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)
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{
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int i;
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int status = 0;
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SET_DEFAULT_BINARY();
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SET_FILE_BINARY(stdin);
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SET_FILE_BINARY(stdout);
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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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static int
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printp( /* print a picture */
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char *fname
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)
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{
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FILE *input;
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int xres, yres;
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COLR scanline[NCOLS];
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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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if (checkheader(input, COLRFMT, NULL) < 0) {
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fprintf(stderr, "%s: not a Radiance picture\n", fname);
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return(-1);
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}
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/* get picture dimensions */
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if (fgetresolu(&xres, &yres, input) < 0) {
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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 (freadcolrs(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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normcolrs(scanline, xres, 0);
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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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static void
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plotscan( /* plot a scanline */
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COLR scan[],
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int len,
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int y
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)
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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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fflush(stdout);
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}
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}
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static int
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bit( /* return bit for color at x */
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COLR clr,
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register int x
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)
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{
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static int cerr[NCOLS];
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static int err;
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int b, errp;
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register int isblack;
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b = normbright(clr);
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errp = err;
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err += b + cerr[x];
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isblack = err < 128;
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if (!isblack) err -= 256;
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err /= 3;
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cerr[x] = err + errp;
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return(isblack);
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}
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